Flexible cophase power supply device, through-type cophase power supply system and traction power supply system

Abstract

The embodiment of the invention provides a flexible cophase power supply device, a through-type cophase power supply system and a traction power supply system, and relates to the technical field of railway traction power supply. A flexible in-phase power supply device is applied to railway traction power supply and comprises a plurality of transformers, a voltage regulating switch and / or a change-over switch. The plurality of transformers are used for transforming the input voltage into a plurality of single-phase output voltages directly or step by step; the voltage regulating switch and / or the change-over switch are / is arranged on a transformation path of the transformer and are / is used for regulating the voltage amplitude and / or polarity of the single-phase output voltage; the output voltage of the flexible in-phase power supply device comprises a series voltage, and the series voltage is obtained based on the series connection of at least two single-phase output voltages with different phases. The output voltage of the transformer is regulated by controlling the voltage regulating switch and / or the change-over switch, so that the amplitude and the phase of the output voltage of the flexible in-phase power supply device are regulated, the cost is low, and the reliability is high.

Description

Technical Field

[0001] This manual relates to the field of railway traction power supply, and in particular to a flexible in-phase power supply device, a through-type in-phase power supply system, and a traction power supply system. Background Technology

[0002] Currently, railway traction power supply commonly uses phase-separated insulators or electrical segmentation to isolate adjacent substation power supply areas, requiring pantographs to be lowered and power cut off when trains pass, severely restricting transportation efficiency. While existing in-phase power supply schemes can eliminate electrical phase separation, they rely on a single topology, making it difficult to dynamically adjust voltage amplitude and phase, resulting in high circulating current losses and poor multi-substation coordination in the traction network. Furthermore, while voltage regulation schemes based on all-power electronic converters offer rapid response, their large-scale application is limited by the cost and reliability risks of high-voltage, high-capacity devices. Summary of the Invention

[0003] One embodiment of this specification provides a flexible in-phase power supply device for railway traction power supply, comprising n (n≥1) transformers, and voltage regulating switches and / or switching switches; the input voltage of the flexible in-phase power supply device is a three-phase voltage or multiple single-phase voltages with different phases; the n transformers are used to directly or stepwise transform the input voltage into m (m≥2) single-phase output voltages; among the m single-phase output voltages, k (2≤k≤m) single-phase output voltages are constructed by combining the voltage regulating switches and / or switching switches, and the multi-tap characteristics of the transformer windings; the voltage regulating switches and / or switching switches are arranged on the transformer transformation path to adjust the voltage amplitude and / or polarity of the single-phase output voltages; the output voltage of the flexible in-phase power supply device includes a series voltage, which is obtained based on the series connection of at least two single-phase output voltages with different phases; by adjusting the single-phase output voltages, the output voltage amplitude and phase of the flexible in-phase power supply device are adjusted.

[0004] In some embodiments, the flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr The system comprises a first voltage regulating switch assembly and a second voltage regulating switch assembly; the three-phase input voltage is input to the flexible in-phase power supply device through phase lines L1, L2, and L3; both the first and second voltage regulating switch assemblies include voltage regulating switches and / or switching switches; wherein, the single-phase transformer T... M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap OM Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3; single-phase transformer T M and single-phase transformer T T The output voltage of the secondary winding is the single-phase output voltage U. M and single-phase output voltage U T Single-phase output voltage U M and single-phase output voltage U T The phase difference is 90°; single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding of the single-phase transformer T has multiple taps. Mr The output voltage of the secondary winding is the single-phase output voltage ΔU M The first voltage regulating switch assembly is used to connect the single-phase transformer T. Mr Different taps on the secondary winding control the single-phase output voltage ΔU M The polarity and amplitude; single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T Tr The secondary winding of the single-phase transformer T has multiple taps. Tr The output voltage of the secondary winding is the single-phase output voltage ΔU T The second voltage regulating switch assembly is used to connect the single-phase transformer T. Tr Different taps on the secondary winding control the single-phase output voltage ΔU T The polarity and amplitude; the single-phase output voltage ΔU M and the single-phase output voltage ΔU T The phase difference is 90°; the output voltage U of the flexible in-phase power supply device TT This includes a series voltage, which is based on the single-phase output voltage ΔU. M The single-phase output voltage ΔU T The single-phase output voltage U M And / or the single-phase output voltage U T The first and second voltage regulating switch assemblies are connected in series to connect different taps and adjust the single-phase output voltage ΔU. M and the single-phase output voltage ΔU T The amplitude and polarity of the voltage U are used to adjust the output voltage U. TT The amplitude and phase.

[0005] In some embodiments, the single-phase transformer T M and the single-phase transformer T Mr Common core; and / or, the single-phase transformer T T and the single-phase transformer T Tr Common iron core.

[0006] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer, the isolation transformer being used to: supply power to the single-phase transformer T Mr The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU. M ; and / or ; for the single-phase transformer T Tr The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU. T The single-phase output voltage ΔU M and single-phase output voltage ΔU T The phase difference is 90°.

[0007] In some embodiments, the first voltage regulating switch assembly includes a voltage regulating switch S M The second voltage regulating switch assembly includes a voltage regulating switch S. T The single-phase transformer T Mr The secondary winding has multiple taps, including the center tap O. Mr The voltage regulating switch S M Used to connect the single-phase transformer T Mr Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. M Connect the lead wire, center tap O Mr and the voltage regulating switch S M The voltage between the connected leads is the single-phase output voltage ΔU. M The single-phase transformer T Tr The secondary winding has multiple taps, including the center tap O. Tr The voltage regulating switch S T Used to connect the single-phase transformer T Tr Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. T Connect the lead wire, center tap O Tr and the voltage regulating switch S T The voltage between the connected leads is the single-phase output voltage ΔU. T .

[0008] In some embodiments, the first voltage regulating switch assembly includes a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch KM1r Switch K M2r The single-pole double-throw switch K Ms Switch K M1r Switch K M2r For switching; single-phase transformer T Mr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two stationary connection terminals; voltage regulating switch S Mr Used to connect the single-phase transformer T Mr The voltage regulating switch S is any one of the multiple taps of the secondary winding. Mr and the switch K M2r The first end is connected via a lead wire; switch K M2r The second-end lead wire and the single-pole double-throw switch K Ms Switch K is connected between the leads of the moving point connection terminal. M1r Switch K M1r The voltage across the terminals is the single-phase output voltage ΔU. M The second voltage regulating switch assembly includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r The single-pole double-throw switch K Ts Switch K T1r Switch K T2r For switching; single-phase transformer T Tr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals; voltage regulating switch S Tr Used to connect the single-phase transformer T Tr The voltage regulating switch S is any one of the multiple taps of the secondary winding. Tr and the switch K T2r The first end is connected via a lead wire; switch K T2r The second-end lead and single-pole double-throw switch K Ts Switch K is connected between the leads of the moving point connection terminal. T1r Switch K T1r The voltage across the terminals is the single-phase output voltage ΔU. T .

[0009] In some embodiments, the flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T and single-phase transformer T rThe first and second voltage regulating switch assemblies are used to input the three-phase input voltage to the flexible in-phase power supply device through phase lines L1, L2, and L3; both the first and second voltage regulating switch assemblies include voltage regulating switches and / or switching switches; wherein, the single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to the phase line L3; wherein, the single-phase transformer T M The output voltage of the secondary winding is the single-phase output voltage U. S Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T T The secondary winding of the single-phase transformer T has multiple taps. T The output voltage of the secondary winding is a single-phase output voltage ΔU1, and the first voltage regulating switch assembly is used to connect the single-phase transformer T. T Different taps on the secondary winding control the polarity and amplitude of the single-phase output voltage ΔU1; single-phase transformer T r The secondary winding of the single-phase transformer T has multiple taps. r The output voltage of the secondary winding is the single-phase output voltage ΔU2, and the second voltage regulating switch assembly is used to connect the single-phase transformer T. r Different taps on the secondary winding control the polarity and amplitude of the single-phase output voltage ΔU2; the single-phase output voltage ΔU1 and the single-phase output voltage ΔU2 are 90° out of phase; the output voltage U of the flexible in-phase power supply device... TT This includes series voltages based on the single-phase output voltages ΔU1, ΔU2, and U. S The first and second voltage regulating switch assemblies are connected in series to connect different taps, thereby adjusting the amplitude and polarity of the single-phase output voltage ΔU1 and the single-phase output voltage ΔU2, and thus adjusting the output voltage U. TT The amplitude and phase; or, the amplitude and phase of a single-phase transformer T. T The output voltage of the secondary winding is the single-phase output voltage U. S Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T MThe secondary winding of the single-phase transformer T has multiple taps. M The output voltage of the secondary winding is a single-phase output voltage ΔU1, and the first voltage regulating switch assembly is used to connect the single-phase transformer T. M Different taps on the secondary winding control the polarity and amplitude of the single-phase output voltage ΔU1; single-phase transformer T r The secondary winding of the single-phase transformer T has multiple taps. r The output voltage of the secondary winding is the single-phase output voltage ΔU2, and the second voltage regulating switch assembly is used to connect the single-phase transformer T. r Different taps on the secondary winding control the polarity and amplitude of the single-phase output voltage ΔU2; the single-phase output voltage ΔU1 and the single-phase output voltage ΔU2 are 90° out of phase; the output voltage U of the flexible in-phase power supply device... TT This includes series voltages based on the single-phase output voltages ΔU1, ΔU2, and U. S The first and second voltage regulating switch assemblies are connected in series to connect different taps, thereby adjusting the amplitude and polarity of the single-phase output voltage ΔU1 and the single-phase output voltage ΔU2, and thus adjusting the output voltage U. TT The amplitude and phase.

[0010] In some embodiments, the single-phase transformer T r and the single-phase transformer T M Common iron core.

[0011] In some embodiments, the single-phase transformer T r and the single-phase transformer T T Common iron core.

[0012] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer, the isolation transformer being used to: supply power to the single-phase transformer T T The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU1; for the single-phase transformer T r The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage △U2; the single-phase output voltage △U1 and the single-phase output voltage △U2 are 90° out of phase.

[0013] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer, the isolation transformer being used to: supply power to the single-phase transformer T M The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU1; for the single-phase transformer T rThe output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage △U2; the single-phase output voltage △U1 and the single-phase output voltage △U2 are 90° out of phase.

[0014] In some embodiments, the first voltage regulating switch assembly includes a voltage regulating switch S, and the second voltage regulating switch assembly includes a voltage regulating switch S. r The single-phase transformer T T The secondary winding has multiple taps, including the center tap O. S The voltage regulating switch S is used to connect the single-phase transformer T. T Any one of the multiple taps of the secondary winding, the connected tap is connected to the lead wire through the voltage regulating switch S, and the intermediate tap O S The voltage between the lead wires connected to the voltage regulating switch S is the single-phase output voltage ΔU1; the single-phase transformer T r The secondary winding has multiple taps, including the center tap O. r The voltage regulating switch S r Used to connect the single-phase transformer T r Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. r Connect the lead wire, the intermediate tap O r and the voltage regulating switch S r The voltage between the connected leads is that of a single-phase transformer T. T The single-phase output voltage ΔU2.

[0015] In some embodiments, the first voltage regulating switch assembly includes a voltage regulating switch S, and the second voltage regulating switch assembly includes a voltage regulating switch S. r The single-phase transformer T T The secondary winding has multiple taps, including the center tap O. S The voltage regulating switch S is used to connect the single-phase transformer T. T Any one of the multiple taps of the secondary winding, the connected tap is connected to the lead wire through the voltage regulating switch S, the intermediate tap O S The voltage between the lead wires connected to the voltage regulating switch S and the single-phase transformer T is... T The single-phase output voltage ΔU1; the single-phase transformer T r The secondary winding has multiple taps, including the center tap O. r The voltage regulating switch S r Used to connect the single-phase transformer T r Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. r Connect the lead wire, the intermediate tap O rand voltage regulating switch S r The voltage between the connected leads is that of a single-phase transformer T. T The single-phase output voltage ΔU2.

[0016] In some embodiments, the second voltage regulating switch assembly includes a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r ; wherein, the single-pole double-throw switch K Ms Switch K M1r and switch K M2r For switching; single-phase transformer T r The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two static connection terminals; the voltage regulating switch S Mr and the switch K M2r The first end is connected via a lead wire; switch K M2r The second lead wire and the single-pole double-throw switch K Ms Switch K is connected between the leads of the moving point connection terminal. M1r Switch K M1r The voltage across the terminals is the single-phase output voltage ΔU2; the first voltage regulating switch assembly includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r The single-pole double-throw switch K Ts Switch K T1r and switch K T2r For switching; single-phase transformer T T The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals; voltage regulating switch S Tr Used to connect the single-phase transformer T T The voltage regulating switch S is any one of the multiple taps of the secondary winding. Tr and the switch K T2r The first end is connected via a lead wire; switch K T2r The second-end lead and single-pole double-throw switch K Ts Switch K is connected between the leads of the moving point connection terminal. T1r Switch K T1r The voltage across the two ends is the single-phase output voltage ΔU1.

[0017] In some embodiments, the second voltage regulating switch assembly includes a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch KM2r Single-phase transformer T r The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two static connection terminals; the voltage regulating switch S Mr and the switch K M2r The first end is connected via a lead wire; switch K M2r The second lead wire and the single-pole double-throw switch K Ms Switch K is connected between the leads of the moving point connection terminal. M1r Switch K M1r The voltage across the terminals is the single-phase output voltage ΔU2; the first voltage regulating switch assembly includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r Single-phase transformer T M The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals; voltage regulating switch S Tr Used to connect the single-phase transformer T M The voltage regulating switch S is any one of the multiple taps of the secondary winding. Tr and the switch K T2r The first end is connected via a lead wire; switch K T2r The second-end lead and single-pole double-throw switch K Ts Switch K is connected between the leads of the moving point connection terminal. T1r Switch K T1r The voltage across the two ends is the single-phase output voltage ΔU1.

[0018] In some embodiments, the flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Voltage regulating switch S M and voltage regulating switch S T The three-phase input voltage is input to the flexible in-phase power supply device through phase lines L1, L2, and L3; wherein, the single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3; single-phase transformer T M The secondary winding has multiple taps, and the voltage regulating switch S M Used to connect the single-phase transformer TM Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. M Connect the lead wires, single-phase transformer T M The first end of the secondary winding is connected to the voltage regulating switch S M The voltage between the connected leads is that of a single-phase transformer T. M The single-phase output voltage ΔU M The connected tap is connected via the voltage regulating switch S. T Connect the lead wires, single-phase transformer T T The first end of the secondary winding is connected to the voltage regulating switch S T The voltage between the connected leads is that of a single-phase transformer T. T The single-phase output voltage ΔU T Single-phase transformer T T The first end of the secondary winding is connected to the voltage regulating switch S. M The single-phase output voltage ΔU M and the single-phase output voltage ΔU T The phase difference is 90°; the output voltage U of the flexible in-phase power supply device TT Includes a series voltage, which is based on the single-phase output voltage U. M and the single-phase output voltage U T Obtained by connecting them in series.

[0019] In some embodiments, the single-phase transformer T T Multiple taps of the secondary winding are located in the single-phase transformer T. T The second end of the secondary winding of the single-phase transformer T; M Multiple taps of the secondary winding are located in the single-phase transformer T. M The second end of the secondary winding.

[0020] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer T. MS and isolation transformer T TS The isolation transformer is used as: a single-phase transformer T M The two ends of the secondary winding are connected to the isolation transformer T. MS The primary side of the isolation transformer T MS Used for the single-phase transformer T M The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU. M Single-phase transformer T T The two ends of the secondary winding are connected to the isolation transformer T. TS The primary side of the isolation transformer T TS Used for the single-phase transformer TT The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU. T The single-phase output voltage ΔU M and the single-phase output voltage ΔU T The phase difference is 90°.

[0021] In some embodiments, the flexible in-phase power supply device includes a three-phase transformer TPT and a voltage regulating transformer T r and voltage regulating switch S a Voltage regulating switch S b Voltage regulating switch S c The three-phase input voltage is input to the flexible in-phase power supply device through phase lines L1, L2, and L3; the primary winding of the three-phase transformer TPT is connected to phase lines L1, L2, and L3, and the secondary winding of the three-phase transformer TPT outputs the three-phase voltage; the voltage regulating transformer T... r The primary winding is connected to the output terminal of the three-phase transformer TPT, which outputs the three-phase voltage. The voltage regulating transformer T... r All three windings on the secondary side are multi-tap windings, and one end of each of the three windings is led out as a fixed connection. The voltage regulating switch S a Voltage regulating switch S b Voltage regulating switch S c These are used to connect any tap in each of the three windings, and the connected taps are respectively connected through the voltage regulating switch S. a Voltage regulating switch S b Voltage regulating switch S c The voltage regulating wires of each of the three windings are connected, and the voltage between the fixed wire and the voltage regulating wire is the voltage regulating output voltage of the corresponding winding in the three windings; the output voltage of the flexible in-phase power supply device includes a series voltage, which is obtained by connecting the three voltage regulating output voltages output by the three windings and one or more phase voltages output by the secondary winding of the three-phase transformer TPT in series.

[0022] In some embodiments, the voltage regulating transformer T r It is a three-phase transformer; or, the voltage regulating transformer T r It consists of three single-phase transformers.

[0023] In some embodiments, the voltage regulating transformer T r It shares the same core as the three-phase transformer TPT.

[0024] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer, which is used to: respectively supply power to the voltage regulating transformer T rThe secondary-side regulated output voltage is isolated and transformed, and then used as three regulated output voltages.

[0025] In some embodiments, the flexible in-phase power supply device further includes a continuously adjustable voltage source, the output voltage of which is coordinated with the single-phase output voltage to continuously adjust the amplitude and phase of the output voltage of the flexible in-phase power supply device; wherein the voltage output by the continuously adjustable voltage source is connected in series with the series voltage; and / or, the continuously adjustable voltage source is connected in series in all or part of the transformer path of the single-phase output voltage.

[0026] In some embodiments, the flexible in-phase power supply device includes a compensation converter, where the output voltage source is an inverter, and the compensation converter and the inverter share a DC bus. The AC side of the compensation converter is directly connected to or isolated via an isolation transformer and then connected to a three-phase voltage port on the main circuit of the flexible in-phase power supply device. Alternatively, the AC side of the compensation converter is directly connected to or isolated via an isolation transformer and then connected to multiple single-phase AC voltage ports on the main circuit of the flexible in-phase power supply device. The voltages of the multiple single-phase AC voltage ports have at least two different voltage phases. The compensation converter is used to draw power from the main circuit, manage reactive power and negative sequence of the traction load, and / or provide power support for the inverter's output voltage as a continuous and adjustable voltage source.

[0027] In some embodiments, the flexible in-phase power supply device bridges the converter, the bridge converter and the inverter share a DC bus, and the AC side of the bridge converter is connected to a three-phase voltage port or multiple single-phase AC voltage ports of the rail transit power distribution system; or, the AC side of the bridge converter is connected to a three-phase voltage port or multiple single-phase AC voltage ports of the rail transit power distribution system after being isolated and transformed by a transformer; the bridge converter is used to draw power from the rail transit power distribution system to provide power support for the inverter as a continuous and adjustable voltage source; the bridge converter is also used to cooperate with the inverter and / or the compensation converter sharing the DC bus to control the power exchange between the traction power supply system and the rail transit power distribution system.

[0028] One embodiment of this specification also provides a flexible in-phase power supply device, including a phase-adjusting transformer and a voltage-adjusting transformer; the phase-adjusting transformer includes multiple transformers, as well as a voltage-adjusting switch and / or a switching switch, for adjusting the phase of the output voltage; the voltage-adjusting transformer includes multiple transformers, as well as a voltage-adjusting switch and / or a switching switch, wherein some or all of the output windings of the voltage-adjusting transformer are multi-tap windings, for adjusting the amplitude of the output voltage; the input voltage of the flexible in-phase power supply device is a three-phase voltage or multiple single-phase voltages with different phases; wherein, the phase-adjusting transformer is used to adjust the phase of the input voltage and output a phase-adjusting voltage; The voltage regulating transformer is used to adjust the amplitude of the phase-modulated voltage and output an amplitude-modulated voltage; the output voltage of the flexible in-phase power supply device includes one single-phase voltage or a series voltage of multiple single-phase voltages in the amplitude-modulated voltage; or, the voltage regulating transformer is used to adjust the amplitude of the input voltage and output an amplitude-modulated voltage; the phase-modulated transformer is used to adjust the phase of the amplitude-modulated voltage and output a phase-modulated voltage; the output voltage of the flexible in-phase power supply device includes one single-phase voltage or a series voltage of multiple single-phase voltages in the phase-modulated voltage; the phase-modulated transformer and the voltage regulating transformer work together to adjust the amplitude and phase of the output voltage of the flexible in-phase power supply device.

[0029] In some embodiments, the phase-shifting transformer is a two-phase phase-shifting transformer, and the voltage-regulating transformer is a two-phase voltage-regulating transformer; the three-phase input voltage is input to the flexible in-phase power supply device through phase lines L1, L2, and L3; wherein, the two-phase voltage-regulating transformer includes a single-phase transformer T. M Single-phase transformer T T And two voltage regulating switches, single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3; single-phase transformer T M The secondary winding and single-phase transformer T T The secondary windings each include multiple taps, and the two voltage regulating switches are used to connect the single-phase transformer T. M The secondary winding or single-phase transformer T T Any tap among the multiple taps of the secondary winding is connected to a lead-out wire via a voltage regulating switch. The lead-out wire connected to the voltage regulating switch is connected to the corresponding single-phase transformer T. M The secondary winding or single-phase transformer T T The voltage between the leads at one end of the secondary winding is that of a single-phase transformer T.M The secondary winding or single-phase transformer T T The secondary winding output voltage; the single-phase transformer T M The secondary winding and single-phase transformer T T The output voltage of the secondary winding of the single-phase transformer T is 90° out of phase; M The secondary winding and single-phase transformer T T The secondary windings of the single-phase transformer T are connected in series, with the series connection point connected to the common terminal P0. M The secondary winding and single-phase transformer T T The other two ends of the secondary winding away from the common terminal are the two-phase output phase lines, and the output voltage of the two-phase voltage regulating transformer includes that of the single-phase transformer T. M and the single-phase transformer T T The output voltage of the two-phase voltage regulating transformer is an amplitude-regulated voltage; the voltage regulating switch is used to adjust the amplitude of the amplitude-regulated voltage by connecting different taps; wherein, the two-phase phase-shifting transformer includes a series transformer T. S1 Series transformer T S2 Combined transformer T E1 Combined transformer T E2 and voltage regulating switch assembly; series transformer T S1 Series transformer T S2 The primary windings of both transformers have center taps. The amplitude modulation voltage is the input voltage of the two-phase phase-shifting transformer. The phase lines of the amplitude modulation voltage are respectively connected to the first terminals of the primary windings of the two series transformers. The second terminals of the primary windings of the two series transformers serve as the phase modulation voltage output terminals P1 and P2, respectively. The combined transformer T E1 and combined transformer T E2 The first end of the primary winding is respectively connected to the series transformer T S2 and series transformer T S1 The center tap of the primary winding; the combined transformer T E1 and combined transformer T E2 The second end of the primary winding is connected to the common terminal P0; combined transformer T E1 The input voltage of the primary winding includes: single-phase transformer T M The output voltage of the secondary winding and the series transformer T S2 Half of the primary winding voltage; combined transformer T E2 The input voltage of the primary winding includes: single-phase transformer T T The output voltage of the secondary winding and the series transformer T S1 The voltage of the primary winding of the combined transformer T is half of the voltage of the primary winding. E1 and combined transformer T E2The secondary winding of the combined transformer has multiple taps. A voltage regulating switch assembly is used to connect any one of the multiple taps on the secondary winding of the combined transformer, controlling the output voltage of the combined transformer. The combined transformer T... E1 and combined transformer T E2 The output voltages are respectively those of the series transformer T. S1 Series transformer T S2 The input voltage of the secondary winding; the output voltage of the two-phase phase-shifting transformer includes: a single-phase voltage U1 between the common terminal P0 and the phase-modulation voltage output terminal P1, and a single-phase voltage U2 between the common terminal P0 and the phase-modulation voltage output terminal P2, wherein the output voltage of the two-phase phase-shifting transformer is a phase-modulation voltage; the voltage regulating switch assembly is used to adjust the phase of the phase-modulation voltage by connecting different taps; the output voltage of the flexible in-phase power supply device includes: a single-phase voltage U1 and / or a single-phase voltage U2.

[0030] In some embodiments, the voltage regulating switch assembly includes a voltage regulating switch S E1 Voltage regulating switch S E2 The combined transformer T E1 The secondary winding has multiple taps, including a center tap, and the connected taps are controlled by a voltage regulating switch S. E1 Connect the lead wires, the center tap of the secondary winding of the combined transformer, and the voltage regulating switch S. E1 The voltage between the connected leads is that of the combined transformer S E1 The output voltage of the combined transformer T; E2 The secondary winding has multiple taps, including a center tap, and the connected taps are controlled by a voltage regulating switch S. E2 Connect the lead wires, the center tap of the secondary winding of the combined transformer, and the voltage regulating switch S. E2 The voltage between the connected leads is that of the combined transformer S E2 The output voltage.

[0031] In some embodiments, the voltage regulating switch assembly includes a single-pole double-throw switch K. S Voltage regulating switch S r Switches K1 and K2; wherein, the single-pole double-throw switch K... S Switches K1 and K2 are changeover switches; the combined transformer T E1 Combined transformer T E2 The structures are identical; the two ends of the secondary winding of the combined transformer are respectively connected to a single-pole double-throw switch K. S Two static connection terminals; the voltage regulating switch S r The first end of the switch K1 is connected to the second end of the switch K1 via a lead wire; the second end of the switch K1 is connected to the single-pole double-throw switch K... SA switch K2 is connected between the leads of the moving point connection terminal, and the voltage across the switch K2 is the output voltage of the combined transformer.

[0032] In some embodiments, the phase-shifting transformer is a two-phase phase-shifting transformer, and the voltage-regulating transformer is a two-phase voltage-regulating transformer; the three-phase input voltage is input to the flexible in-phase power supply device through phase lines L1, L2, and L3; wherein, the two-phase voltage-regulating transformer includes a single-phase transformer T. M and single-phase transformer T T And two voltage regulating switches, single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3; single-phase transformer T M The secondary winding and single-phase transformer T T The secondary windings each include multiple taps, and two voltage regulating switches are used to connect the single-phase transformer T. M The secondary winding or single-phase transformer T T Any tap among the multiple taps of the secondary winding is connected to a lead-out wire via a voltage regulating switch. The lead-out wire connected to the voltage regulating switch is connected to the corresponding single-phase transformer T. M The secondary winding or single-phase transformer T T The voltage between the leads at one end of the secondary winding is that of a single-phase transformer T. M The secondary winding or single-phase transformer T T The secondary winding output voltage; the single-phase transformer T M The secondary winding and single-phase transformer T T The output voltage of the secondary winding of the single-phase transformer T is 90° out of phase; M The secondary winding and single-phase transformer T T The secondary windings of the single-phase transformer T are connected in series, with the series connection point connected to the common terminal P0. M The secondary winding and single-phase transformer T T The other two ends of the secondary winding away from the common terminal are the two-phase output phase lines, and the output voltage of the two-phase voltage regulating transformer includes that of the single-phase transformer T. M and the single-phase transformer T TThe output voltage of the two-phase voltage-regulating transformer is an amplitude-regulating voltage; the voltage regulating switch is used to adjust the amplitude of the amplitude-regulating voltage by connecting different taps; wherein, the two-phase phase-shifting transformer includes a first single-phase transformer, a second single-phase transformer, and a voltage regulating switch assembly S. T1 Voltage regulating switch assembly S T2 Voltage regulating switch assembly S M1 and voltage regulating switch assembly S M2 The secondary side of the first single-phase transformer includes winding T. T1 and winding T T2 The secondary side of the second single-phase transformer includes winding T M1 and winding T M2 The winding T T1 Winding T T2 Winding T M1 and winding T M2 Each has multiple taps; the voltage regulating switch assembly S T1 Used to connect the winding T T1 Any one of multiple taps; the voltage regulating switch assembly S T2 Used to connect the winding T T2 Any one of the multiple taps; the voltage regulating switch assembly S M1 Used to connect the winding T M1 Any one of the multiple taps; the voltage regulating switch assembly S M2 Used to connect the winding T M2 Any one of the multiple taps; the voltage regulating switch assembly S T1 Voltage regulating switch assembly S T2 Used to adjust the winding T respectively T1 and winding T T2 The output voltage of the voltage regulator is equal to the output voltage of the voltage regulator; the voltage regulating switch assembly S M1 Voltage regulating switch assembly S M2 Used to adjust the winding T respectively M1 and winding T M2 The output voltage of the first single-phase transformer is equal to the output voltage of the primary winding; the input voltage of the primary winding of the first single-phase transformer includes: winding T M1 The voltage, and the winding T M1 The input phase voltage; the input voltage of the primary winding of the second single-phase transformer includes: winding T T1 The voltage, and the winding T T1 The input phase voltage; the output voltage of the two-phase phase-shifting transformer includes: the single-phase voltage U' between the common terminal P0 and the phase-shifting voltage output terminal P1. T And the single-phase voltage U' between the common terminal P0 and the phase modulation voltage output terminal P2. MThe output voltage of the two-phase phase-shifting transformer is a phase-modulated voltage; the first and second voltage-regulating switch assemblies are used to adjust the phase of the phase-modulated voltage by connecting different taps; the output voltage of the flexible in-phase power supply device includes: single-phase voltage U' T and / or single-phase voltage U' M .

[0033] In some embodiments, the plurality of taps includes an intermediate tap, and the voltage regulating switch assembly S T1 Voltage regulating switch assembly S T2 Voltage regulating switch assembly S M1 and voltage regulating switch assembly S M2 Each includes a voltage regulating switch; the voltage regulating switch assembly S T1 Voltage regulating switch assembly S T2 Voltage regulating switch assembly S M1 and voltage regulating switch assembly S M2 These are respectively used to connect the winding T T1 Winding T T2 Winding T M1 and winding T M2 Any one of the multiple taps, the connected tap is connected through the voltage regulating switch assembly S. T1 Voltage regulating switch assembly S T2 Voltage regulating switch assembly S M1 and voltage regulating switch assembly S M2 Connect the lead wires, the voltage regulating switch assembly S T1 The connected lead wire and the winding T T1 The voltage between the intermediate taps is the voltage of the winding T. T1 The output voltage; the voltage regulating switch assembly S T2 The connected lead wire and the winding T T2 The voltage between the intermediate taps is the voltage of the winding T. T2 The output voltage; the voltage regulating switch assembly S M1 The connected lead wire and the winding T M1 The voltage between the intermediate taps is the voltage of the winding T. M1 The output voltage; the voltage regulating switch assembly S M2 The connected lead wire and the winding T M2 The voltage between the intermediate taps is the voltage of the winding T. M2 The output voltage.

[0034] In some embodiments, the voltage regulating switch assembly S T1 Voltage regulating switch assembly S T2 Voltage regulating switch assembly S M1 and voltage regulating switch assembly S M2 They have the same structure and both include a single-pole double-throw switch K.S Voltage regulating switch S r Switches K1 and K2; wherein, the single-pole double-throw switch K... S Switches K1 and K2 are switching switches; the winding T T1 Winding T T2 Winding T M1 and winding T M2 The structures are the same; the winding T T1 Winding T T2 Winding T M1 Or winding T M2 Both ends are connected to a single-pole double-throw switch K. S Two static connection terminals; the voltage regulating switch S r The first end of the switch K1 is connected to the second end of the switch K1 via a lead wire; the second end of the switch K1 is connected to the single-pole double-throw switch K... S A switch K2 is connected between the leads of the moving point connection terminal, and the voltage across the switch K2 is equal to the voltage across the winding T. T1 Winding T T2 Winding T M1 Or winding T M2 The output voltage.

[0035] In some embodiments, the phase-shifting transformer is a two-phase phase-shifting transformer, and the voltage-regulating transformer is a two-phase voltage-regulating transformer; the three-phase input voltage is input to the flexible in-phase power supply device through phase lines L1, L2, and L3; wherein, the two-phase voltage-regulating transformer includes a single-phase transformer T. M and single-phase transformer T T And two voltage regulating switches, single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3; single-phase transformer T M The secondary winding and single-phase transformer T T The secondary windings each include multiple taps, and two voltage regulating switches are used to connect the single-phase transformer T. M The secondary winding or single-phase transformer T T Any tap among the multiple taps of the secondary winding is connected to a lead-out wire via a voltage regulating switch. The lead-out wire connected to the voltage regulating switch is connected to the corresponding single-phase transformer T. M The secondary winding or single-phase transformer T TThe voltage between the leads at one end of the secondary winding is that of a single-phase transformer T. M The secondary winding or single-phase transformer T T The secondary winding output voltage; the single-phase transformer T M The secondary winding and single-phase transformer T T The output voltage of the secondary winding of the single-phase transformer T is 90° out of phase; M The secondary winding and single-phase transformer T T The secondary windings of the single-phase transformer T are connected in series, with the series connection point connected to the common terminal P0. M The secondary winding and single-phase transformer T T The other two ends of the secondary winding away from the common terminal are the two-phase output phase lines, and the output voltage of the two-phase voltage regulating transformer includes that of the single-phase transformer T. M and the single-phase transformer T T The output voltage of the two-phase voltage-regulating transformer is an amplitude-regulating voltage; the voltage regulating switch is used to adjust the amplitude of the amplitude-regulating voltage by connecting different taps; wherein, the two-phase phase-shifting transformer includes a single-phase transformer T. S1 Single-phase transformer T S2 Voltage regulating switch S M1 Voltage regulating switch S M2 Voltage regulating switch S T1 and voltage regulating switch S T2 The single-phase transformer T S1 and the single-phase transformer T S2 The secondary windings each have multiple taps, including a center tap; the voltage regulating switch S T1 and voltage regulating switch S T2 These are respectively used to connect the single-phase transformer T S1 Any one of the multiple taps of the secondary winding, the connected taps are respectively connected through the voltage regulating switch S T1 and voltage regulating switch S T2 Connect the lead wire, the voltage regulating switch S T1 The connected lead wires and the voltage regulating switch S T2 The connected lead wire is the single-phase transformer T S1 The output voltage of the secondary winding; the voltage regulating switch S M1 and voltage regulating switch S M2 Used to connect single-phase transformer T S2 Any one of the multiple taps of the secondary winding, the connected taps are respectively connected through the voltage regulating switch S M1 and voltage regulating switch S M2 Connect the lead wire, the voltage regulating switch S M1 The connected lead wires and the voltage regulating switch S M2 The voltage between the connected leads is that of the single-phase transformer TS2 The output voltage of the secondary winding; the voltage regulating switch S T1 The voltage regulating switch S is connected to one phase line of the phase-shifting voltage regulator via a lead-out wire, serving as one input terminal of the two-phase phase-shifting transformer. T2 The voltage regulating switch S is connected to one output terminal P1 of a two-phase phase-shifting transformer via a lead wire. M1 The voltage regulating switch S is connected to one phase line of the phase-shifting voltage regulator via a lead-out wire, serving as one input terminal of the two-phase phase-shifting transformer. M2 The single-phase transformer T is connected to one output terminal P2 of the two-phase phase-shifting transformer via a lead wire. S2 The input voltage of the primary winding includes: single-phase transformer T S1 The phase voltage connected to the secondary winding, and the voltage regulating switch S T1 and the single-phase transformer T S1 The voltage between the intermediate taps of the secondary winding; the single-phase transformer T S1 The input voltage of the primary winding includes: single-phase transformer T S2 The phase voltage connected to the secondary winding, and the voltage regulating switch S T2 and the single-phase transformer T S2 The voltage between the intermediate taps of the secondary winding; the voltage regulating switch S T1 Voltage regulating switch S T2 Used to adjust the single-phase transformer T S1 The output voltages on both sides of the middle tap of the secondary winding are made equal; the voltage regulating switch S M1 Voltage regulating switch S M2 Used to adjust the single-phase transformer T S2 The output voltage of the intermediate tap of the secondary winding is equal to the output voltage of the two-phase phase-shifting transformer. The output voltage of the two-phase phase-shifting transformer includes the single-phase voltage U' between the common terminal P0 and the phase-adjustment voltage output terminal P1. T And the single-phase voltage U' between the common terminal P0 and the phase modulation voltage output terminal P2. M The output voltage of the two-phase phase-shifting transformer is a phase-modulation voltage; the voltage regulating switch S T2 Voltage regulating switch S M2 The component is used to adjust the phase of the phase-modulated voltage by connecting different taps; the output voltage of the flexible in-phase power supply device includes: single-phase voltage U' T and / or single-phase voltage U' M .

[0036] In some embodiments, the flexible in-phase power supply device further includes a continuously adjustable voltage source, which works in conjunction with the phase-adjusting transformer and the voltage-adjusting transformer to continuously adjust the amplitude and phase of the output voltage of the flexible in-phase power supply device; wherein the continuously adjustable voltage source is connected in series in one or more of the output voltage circuit, input voltage circuit, phase-adjusting voltage circuit or amplitude-adjusting voltage circuit of the flexible in-phase power supply device.

[0037] In some embodiments, the flexible in-phase power supply device further includes a compensation converter, the output voltage continuous and adjustable voltage source is an inverter, and the compensation converter and the inverter share a DC bus; the AC side of the compensation converter is connected to a three-phase voltage port or multiple single-phase AC voltage ports on the main circuit of the flexible in-phase power supply device; or, the AC side of the compensation converter is isolated by an isolation transformer and then connected to a three-phase voltage port or multiple single-phase AC voltage ports on the main circuit of the flexible in-phase power supply device; wherein, the voltages of the multiple single-phase AC voltage ports have multiple different voltage phases; the compensation converter is used to draw power from the main circuit, manage the reactive power and negative sequence of the traction load, and / or provide power support for the output voltage of the inverter as an output voltage continuous and adjustable voltage source.

[0038] In some embodiments, the flexible in-phase power supply device further includes a bridging converter, which shares a DC bus with the inverter. The AC side of the bridging converter is connected to a three-phase voltage port or multiple single-phase AC voltage ports of the rail transit power distribution system; or, the AC side of the bridging converter is connected to a three-phase voltage port or multiple single-phase AC voltage ports of the rail transit power distribution system after being isolated and transformed by a transformer. The bridging converter is used to draw power from the rail transit power distribution system to provide power support for the inverter as a continuous and adjustable voltage source. The bridging converter is also used to cooperate with the inverter and / or the compensation converter sharing the DC bus to control the power exchange between the traction power supply system and the rail transit power distribution system.

[0039] One embodiment of this specification also provides a multi-power flexible through-type in-phase power supply system, including an external power supply line, multiple traction substations, and an electrically continuous traction network. Among the multiple traction substations, at most one is a non-adjustable voltage traction substation, and the remaining traction substations are adjustable voltage traction substations. At least one of the adjustable voltage traction substations includes a flexible in-phase power supply device as described in any of the preceding embodiments. Each traction substation corresponds to at least one external power supply line. The adjustable voltage traction substation is used to adjust the phase and amplitude of the voltage input to the corresponding external power supply line. The output voltage of the traction substation is the traction power supply voltage, which is transmitted to the traction network. The adjustable voltage traction substation adjusts its own output voltage so that the voltage difference between the output voltages of all traction substations is less than a voltage threshold. Alternatively, the adjustable voltage traction substation adjusts the relative value of the output voltage between traction substations, and controls the distribution of traction load power flow among various traction substations by adjusting the magnitude of the relative value, or responds to the demand for external power auxiliary services of the traction substations.

[0040] One embodiment of this specification also provides an uninterrupted power supply traction power supply system, including an external power supply line, multiple traction substations, an electrically continuous traction network, and multiple electrical substations. Among the multiple traction substations, at most one is a non-adjustable voltage traction substation, and the remaining traction substations are adjustable voltage traction substations. At least one of the adjustable voltage traction substations includes a flexible in-phase power supply device as described in any of the preceding embodiments. Each traction substation corresponds to at least one external power supply line. The adjustable voltage traction substation is used to adjust the phase and amplitude of the voltage input to the corresponding external power supply line. The output voltage is the traction power supply voltage, which is transmitted to the traction network. Multiple electrical substations are installed on the traction network between every two adjacent traction substations, dividing the traction network into multiple sections. Each section's traction network is powered by the traction substation connected to that section's traction network. The adjustable voltage traction substation adjusts the phase and amplitude of its output voltage to ensure that the phase and amplitude of the output voltage of all traction substations are equal. Alternatively, the adjustable voltage traction substation dynamically adjusts the phase and amplitude of its output voltage. When a vehicle needs to cross an electrical substation, at least one traction substation on both sides of the substation to be crossed adjusts its output voltage to ensure that the voltage phase and amplitude on both sides of the substation to be crossed are equal.

[0041] In some embodiments, the uninterrupted power supply traction power supply system further includes a power balancing device connected in parallel to the electrical substation. The power balancing device is an AC-DC-AC converter, and it is used to regulate the power flow between the traction substations. Attached Figure Description

[0042] This specification will be further described by way of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not limiting; in these embodiments, the same reference numerals denote the same structures, wherein:

[0043] Figure 1 This is a schematic diagram of a multi-source flexible through-type in-phase power supply system according to some embodiments of this specification;

[0044] Figure 2 This is a structural schematic diagram of an uninterrupted power supply traction power supply system according to some embodiments of this specification;

[0045] Figure 3-16 This is a schematic diagram of a first type of topology of a flexible in-phase power supply device according to some embodiments of this specification;

[0046] Figure 17-28 This is a schematic diagram of a second type of topology of a flexible in-phase power supply device according to some embodiments of this specification;

[0047] Figures 29-30 This is a schematic diagram of a third type of topology for a flexible in-phase power supply device according to some embodiments of this specification;

[0048] Figures 31-44 This is a schematic diagram of a fourth type of topology for a flexible in-phase power supply device according to some embodiments of this specification;

[0049] Figures 45-53 This is a schematic diagram of a fifth type of topology for a flexible in-phase power supply device according to some embodiments of this specification;

[0050] Figure 54-62 This is a schematic diagram of a sixth type of topology for a flexible in-phase power supply device according to some embodiments of this specification;

[0051] Figures 63-66 This is a schematic diagram of a seventh type of topology for a flexible in-phase power supply device according to some embodiments of this specification. Detailed Implementation

[0052] To more clearly illustrate the technical solutions of the embodiments in this specification, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are merely some examples or embodiments of this specification. For those skilled in the art, these drawings can be applied to other similar scenarios without creative effort. Unless obvious from the context or otherwise specified, the same reference numerals in the drawings represent the same structures or operations.

[0053] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one way to distinguish different components, elements, parts, sections, or assemblies at different levels. However, if other terms can achieve the same purpose, they may be replaced by other expressions.

[0054] As indicated in this specification and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0055] Figure 1 This is a schematic diagram of a flexible, continuous, in-phase power supply system with multiple power sources, as shown in some embodiments of this specification.

[0056] like Figure 1 As shown, one embodiment of this specification provides a flexible, continuous, in-phase power supply system with multiple power sources, including n external power inputs (S1-S2). n n traction substations (TS1-TS n ), and an electrically connected traction network TN, wherein, among the plurality of traction substations, at most one traction substation is a non-adjustable voltage traction substation, and the remaining traction substations are adjustable voltage traction substations, and among the adjustable voltage traction substations, at least one traction substation includes a flexible in-phase power supply device.

[0057] Each of the traction substations corresponds to at least one external power supply line. The adjustable voltage traction substation is used to adjust the phase and amplitude of the voltage input to the corresponding external power supply line. The output voltage of the traction substation is the traction power supply voltage, which is transmitted to the traction network.

[0058] The adjustable voltage traction substation adjusts its own output voltage so that the voltage difference between the output voltages of all traction substations is less than the voltage threshold.

[0059] or,

[0060] The adjustable voltage traction substation adjusts the relative value of the output voltage between traction substations, and controls the distribution of traction load power flow between each traction substation by adjusting the magnitude of the relative value, or responds to the demand for external power auxiliary services of the traction substation.

[0061] The through-type in-phase power supply system employs a hybrid deployment of non-adjustable traction substations (at most one) and adjustable traction substations (all others), with each adjustable substation containing at least one flexible in-phase power supply device (or a voltage regulation device compatible with traditional power electronic converters). The core of the system is phase / amplitude coordinated regulation: each adjustable substation dynamically adjusts its single-phase output voltage (amplitude ±ΔU, phase ±Δθ) via a switching switch / adjustable voltage source, and series-connects multiple single-phase outputs with different phases to synthesize the target voltage. Through central dispatch control, two operating modes are implemented: Mode 1: adjusting the output voltage of each substation until the amplitude and phase difference are less than a threshold (global voltage equalization); Mode 2: strategically controlling the relative values ​​of output voltages between substations (such as the difference ΔU or phase difference Δθ) to proactively guide load flow or respond to grid demands.

[0062] For example, when a high-speed train travels from the power supply area of ​​substation A to the power supply area of ​​substation B, the central dispatcher detects a 5° phase difference and a 3kV amplitude difference (above the threshold) in the output voltage of the two substations. At this time, the flexible in-phase power supply device of substation B is activated for adjustment: first, the amplitude is increased by 2kV through transformer tap switching, and then a series synthesis circuit is used to compensate for the 3° phase difference; at the same time, substation A finely adjusts the amplitude by -1kV, so that the output voltage difference between the two substations converges to <0.5kV / <1°. This eliminates circulating current in the traction network and avoids overheating and loss of cables.

[0063] For example, when there is a significant difference between peak and off-peak electricity prices (off-peak prices are 30% lower), the central dispatch center proactively sets the output voltage amplitude of station B to be 4kV lower than that of station A (creating a controllable voltage difference). The load naturally shifts to station B (due to impedance balance principles), ensuring that 80% of the load is covered by the lower-priced off-peak electricity. Simultaneously, station A reduces its output power and responds to ancillary services—injecting 10Mvar of reactive power into the local grid to obtain frequency regulation compensation benefits.

[0064] By allowing up to one non-adjustable traction substation (traditional fixed output) to coexist with multiple adjustable substations, the following can be achieved: when upgrading existing railway networks, the original substation infrastructure can be retained, with only a few new adjustable substations added; or, non-critical sections can be supplied by traditional substations, while intelligent equipment can focus on critical nodes.

[0065] By requiring at least one flexible in-phase power supply device (the rest can be compatible with power electronic converters) in the adjustable voltage traction substation, the following are achieved: the transformer-based scheme (flexible device) ensures reliability in high-voltage, high-capacity scenarios (e.g., >10kV / 50MW), and the power electronic scheme responds to high-frequency fine-tuning; at the same time, the flexible in-phase power supply device has a lower equipment cost compared to the traditional adjustable voltage traction substation based on power electronic converters, which can save costs for the entire line's through-type in-phase power supply system.

[0066] Figure 2This is a structural schematic diagram of an uninterrupted power supply traction power supply system according to some embodiments of this specification.

[0067] like Figure 2 As shown, one embodiment of this specification also provides an uninterrupted power supply traction power supply system, including n external power input lines (S1-S2). n n traction substations (TS1-TS n The traction network TN, which is electrically connected throughout the entire line, and n electrical sub-sections (SC1-SC1). n ), wherein, among the plurality of traction substations, at most one traction substation is a non-adjustable voltage traction substation, and the remaining traction substations are adjustable voltage traction substations, and among the adjustable voltage traction substations, at least one traction substation includes a flexible in-phase power supply device;

[0068] Each of the traction substations corresponds to at least one external power supply line. The adjustable voltage traction substation is used to adjust the phase and amplitude of the voltage input to the corresponding external power supply line. The output voltage of the traction substation is the traction power supply voltage, which is transmitted to the traction network.

[0069] Multiple electrical substations are installed on the traction network between every two adjacent traction substations, dividing the traction network into multiple sections. The traction network of each section is powered by the traction substation connected to the traction network of that section.

[0070] The adjustable voltage traction substation adjusts the phase and amplitude of its own output voltage so that the phase and amplitude of the output voltage of all traction substations are equal.

[0071] or,

[0072] The adjustable voltage traction substation dynamically adjusts the phase and amplitude of its own output voltage. When the vehicle needs to cross an electrical substation, at least one traction substation on both sides of the electrical substation to be crossed adjusts its own output voltage so that the voltage phase and amplitude on both sides of the electrical substation to be crossed are equal.

[0073] The working principle of the uninterrupted power supply (UPS) traction power supply system is based on the coordinated regulation of multiple traction substations to achieve uninterrupted power supply along the entire line in the same phase: After the external incoming power supply inputs three-phase or multi-phase voltage to the substations, most adjustable traction substations (at most one non-adjustable substation as a backup) dynamically adjust the amplitude and phase of the output voltage through internal voltage regulation mechanisms, specifically accomplished by flexible in-phase power supply devices or other voltage regulators (such as power electronic converters); through central dispatch control, the output voltage of all substations is forced to match to the same amplitude and phase, thereby eliminating voltage differences on the segmented traction network of the electrical substation. When a vehicle needs to cross an electrical substation, the voltage of the adjacent substation dynamically fine-tunes to ensure that the voltage difference between the two sides of the electrical substation is less than a threshold, avoiding traditional electromagnetic compatibility issues.

[0074] For example, when all trains are operating normally within their respective power supply sections, the system maintains a steady-state balance: each adjustable traction substation (including at least one substation with a flexible in-phase power supply device, the rest being traditional voltage regulators) monitors its own output voltage phase and amplitude in real time and coordinates adjustments through central dispatch instructions; the flexible in-phase power supply device operates the voltage regulating switch in the transformer path according to the instructions to change the winding connection state or connect a continuous voltage source to synthesize a precise match with the output voltage of other substations (such as phase error < 1 degree, amplitude error < 5%), ensuring that the traction network voltage in all sections of the network is consistent and that power transmission is stable. At this time, non-adjustable substations (if they exist) play the role of a fixed reference but do not participate in the adjustment, maximizing power supply reliability and saving costs.

[0075] For example, when a train approaches an electrical break section and needs to cross it, the system triggers a dynamic adjustment process: the adjustable voltage traction substations on both sides of the electrical break section (such as stations containing flexible in-phase power supply devices) receive control signals and instantly adjust the transformer path parameters, such as changing the output polarity through switching switches or compensating for the phase difference with a continuous voltage source, so that the voltage amplitude and phase on both sides of the break section are synchronized to less than the threshold within milliseconds; if this process involves flexible in-phase power supply devices, their multi-transformer cascading capability is fully utilized to efficiently generate series voltage, while other traditional voltage regulating substations (such as power electronic converter types) also respond and coordinate, ultimately ensuring a smooth and uninterrupted transition for the train. At the same time, the system may reduce the adjustment frequency to prioritize economic dispatch (such as optimizing the grid-side active power distribution) and avoid energy loss.

[0076] By configuring multiple traction substations into a structure of "at most one non-adjustable voltage substation and the rest adjustable voltage substations", the system achieves high reliability and economic flexibility: the non-adjustable voltage substations serve as simplified backup nodes (such as using a traditional fixed output design), reducing system complexity and cost, while the adjustable voltage substations dominate regulation (accounting for >90%), ensuring active voltage balance across the entire network, avoiding the risk of collapse due to a single node failure, and enhancing the scalability to be compatible with the existing power grid.

[0077] By setting "at least one flexible in-phase power supply device" in the adjustable voltage traction substation (the rest can be other voltage regulation methods such as converters), the system achieves dual optimization of voltage regulation accuracy and economic efficiency: the flexible in-phase power supply device relies on transformers and switches to achieve voltage regulation (key scenarios such as phase fine adjustment) to save costs, while other substations can use traditional power electronic converters in cooperation. Overall, it not only meets the stringent in-phase requirements, but also reduces the overall investment, and can aggregate power flow data from multiple stations to support dynamic economic dispatch (such as profit from grid-side active power resale).

[0078] By coordinating the adjustment of the output voltage amplitude and phase, the voltage difference at the electrical section is reduced to below the threshold. The amplitude and phase consistency eliminates the electromagnetic interference of zero-crossing switching, ensuring that the train crosses the electrical section without interruption, thus improving transportation efficiency and safety.

[0079] By flexibly switching between dynamic power supply balance and optimized economic dispatch, the system becomes both efficient and economical: in steady state, priority is given to voltage balance to stabilize the traction network load; during idle periods, the grid service is optimized according to the dispatch based on the "power flow" (such as active power flow), such as local consumption or cross-grid transactions, to achieve energy cost savings.

[0080] In some embodiments, an uninterruptible power supply traction power supply system further includes a power balancing device connected in parallel to the electrical substation. The power balancing device is an AC-DC-AC converter, and it is used to regulate the power flow between the traction substations.

[0081] One embodiment of this specification also provides a flexible in-phase power supply device for railway traction power supply, comprising n (n≥1) transformers, as well as voltage regulating switches and / or switching switches;

[0082] The input voltage of the flexible in-phase power supply device is a three-phase voltage or a single-phase voltage with multiple phase differences;

[0083] n transformers are used to directly or stepwise transform the input voltage into m (m≥2) single-phase output voltages;

[0084] Of the m single-phase output voltages, k (2≤k≤m) single-phase output voltages are constructed by combining the voltage regulating switch and / or switching switch, as well as the multi-tap characteristic of the transformer winding. The voltage regulating switch and / or switching switch are set on the transformer's transformer path to adjust the voltage amplitude and / or polarity of the single-phase output voltage.

[0085] The output voltage of the flexible in-phase power supply device includes a series voltage, which is obtained by connecting at least two single-phase output voltages with different phases in series; by adjusting the single-phase output voltage, the amplitude and phase of the output voltage of the flexible in-phase power supply device are adjusted.

[0086] A transformer path refers to the key circuit path involved in voltage transformation. It can be either the primary or secondary winding branch in a single transformer that realizes input-output conversion, or it can be extended to a composite voltage regulation channel composed of multiple primary or secondary windings when multiple transformers are connected in parallel or cascaded.

[0087] In some embodiments, the flexible in-phase power supply device further includes a continuously adjustable voltage source, wherein the output voltage of the continuously adjustable voltage source and the single-phase output voltage are coordinated to continuously adjust the amplitude and phase of the output voltage of the flexible in-phase power supply device.

[0088] in,

[0089] The voltage output by the continuously adjustable voltage source is connected in series with the series voltage.

[0090] And / or,

[0091] A continuous and adjustable voltage source for the output voltage is connected in series in the transformer path of all or part of the single-phase output voltage.

[0092] In some embodiments, the flexible in-phase power supply device further includes a compensation converter, the output voltage source being an inverter with continuous and adjustable voltage, and the compensation converter and the inverter sharing a DC bus.

[0093] The AC side of the compensation converter is directly connected to or, after being isolated by an isolation transformer, connected to the three-phase voltage port on the main circuit of the flexible in-phase power supply device.

[0094] or,

[0095] The AC side of the compensation converter is directly connected to, or isolated by an isolation transformer, to, multiple single-phase AC voltage ports on the main circuit of the flexible in-phase power supply device.

[0096] Among them, the voltages of multiple single-phase AC voltage ports have at least two different voltage phases;

[0097] The compensating converter is used to draw power from the main circuit, manage the reactive power and negative sequence of the traction load, and / or provide power support for the inverter as a continuous and adjustable voltage source.

[0098] In some embodiments, the flexible in-phase power supply device further includes a bridging converter, the bridging converter and the inverter share a DC bus, and the AC side of the bridging converter is connected to a three-phase voltage port or multiple single-phase AC voltage ports of the rail transit power distribution system.

[0099] or,

[0100] The AC side of the bridging converter is connected to the three-phase voltage port or multiple single-phase AC voltage ports of the rail transit power distribution system after being isolated and transformed by a transformer.

[0101] The bridging converter is used to draw power from the rail transit power distribution system to provide power support for the inverter as a continuous and adjustable voltage source.

[0102] Bridge converters are also used in conjunction with inverters and / or compensating converters on a common DC bus to control the power exchange between the traction power supply system and the rail transit power distribution system.

[0103] In some embodiments, the flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr The first voltage regulating switch assembly and the second voltage regulating switch assembly; the three-phase input voltage is input to the flexible in-phase power supply device through phase lines L1, L2 and L3; both the first voltage regulating switch assembly and the second voltage regulating switch assembly include a voltage regulating switch and / or a switching switch;

[0104] Among them, single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to the phase line L3;

[0105] Single-phase transformer T M and single-phase transformer T T The output voltage of the secondary winding is the single-phase output voltage U. M and single-phase output voltage U T Single-phase output voltage U M and single-phase output voltage U T The phase difference is 90°;

[0106] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding of the single-phase transformer T has multiple taps. Mr The output voltage of the secondary winding is the single-phase output voltage ΔU M The first voltage regulating switch assembly is used to connect the single-phase transformer T. Mr Different taps on the secondary winding control the single-phase output voltage ΔU M The polarity and amplitude;

[0107] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer TTr The secondary winding of the single-phase transformer T has multiple taps. Tr The output voltage of the secondary winding is the single-phase output voltage ΔU T The second voltage regulating switch assembly is used to connect the single-phase transformer T. Tr Different taps on the secondary winding control the single-phase output voltage ΔU T The polarity and amplitude;

[0108] The single-phase output voltage ΔU M and the single-phase output voltage ΔU T The phase difference is 90°;

[0109] The output voltage U of the flexible in-phase power supply device TT This includes a series voltage, which is based on the single-phase output voltage ΔU. M The single-phase output voltage ΔU T The single-phase output voltage U M And / or the single-phase output voltage U T Obtained by connecting in series;

[0110] The first and second voltage regulating switch assemblies are used to connect different taps to adjust the single-phase output voltage ΔU. M and the single-phase output voltage ΔU T The amplitude and polarity of the voltage U are used to adjust the output voltage U. TT The amplitude and phase.

[0111] In some embodiments, the single-phase transformer T M and the single-phase transformer T Mr Common core;

[0112] And / or,

[0113] The single-phase transformer T T and the single-phase transformer T Tr Common iron core.

[0114] In some embodiments, the first voltage regulating switch assembly includes a voltage regulating switch S M The second voltage regulating switch assembly includes a voltage regulating switch S. T ;

[0115] The single-phase transformer T Mr The secondary winding has multiple taps, including the center tap O. Mr The voltage regulating switch S M Used to connect the single-phase transformer T Mr Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. MConnect the lead wire, center tap O Mr and the voltage regulating switch S M The voltage between the connected leads is the single-phase output voltage ΔU. M ;

[0116] The single-phase transformer T Tr The secondary winding has multiple taps, including the center tap O. Tr The voltage regulating switch S T Used to connect the single-phase transformer T Tr Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. T Connect the lead wire, center tap O Tr and the voltage regulating switch S T The voltage between the connected leads is the single-phase output voltage ΔU. T .

[0117] Figure 3-16 This is a schematic diagram of a first type of topology for a flexible in-phase power supply device according to some embodiments of this specification.

[0118] like Figure 3 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr Voltage regulating switch S M and S T .

[0119] Among them, single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0120] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T MrThe secondary winding includes a center tap O. Mr Several taps, including the voltage regulating switch S M From including the middle tap O Mr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. M Lead-out wires, single-phase transformer T Mr The center tap O of the secondary winding Mr With single-phase transformer T M The first end of the secondary winding is connected.

[0121] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T Tr The secondary winding includes a center tap O. Tr Several taps, including the voltage regulating switch S T From including the middle tap O Tr Choose any one of the taps, including the one for voltage regulating switch S. T Lead wires; Single-phase transformer T Tr The center tap O of the secondary winding Tr Connect voltage regulating switch S M Lead wire.

[0122] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to a voltage regulating switch S. T One lead is connected to the other output terminal, which is connected to a single-phase transformer T. T The second end of the secondary winding.

[0123] Specifically, in this embodiment, the output voltage U TT The formula for calculating the series vector summation of voltage sources is as follows:

[0124]

[0125] in,

[0126] k1 is a single-phase transformer T Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer, ΔU M For single-phase transformer T Mr The center tap O of the secondary winding Mr To the voltage regulating switch S M The voltage between the leads represents the voltage across the single-phase transformer T. Mr Secondary output voltage, ΔU TFor single-phase transformer T Tr The center tap O of the secondary winding Tr To the voltage regulating switch S T The voltage between the leads represents the voltage across the single-phase transformer T. Tr Secondary output voltage, U M For single-phase transformer T M The output voltage of the secondary winding, U T For single-phase transformer T T The output voltage of the secondary winding, voltage U M and U T The phase difference is 90°, and the voltage ΔU M and △U T The phase difference is 90°; by adjusting the voltage regulating switch S M and S T By adjusting the position of the tap, the actual transformer ratios k1 and k2 are changed, thereby adjusting ΔU. M and △U T The amplitude and polarity are used to achieve the output voltage U. TT Continuous adjustment of amplitude and phase.

[0127] Adjust the voltage regulating switch S M and S T The position of the switching tap is changed to alter the actual turns ratios k1 and k2, thereby independently adjusting the voltage ΔU. M and △U T The amplitude and polarity of the voltage U make the output voltage U TT The amplitude and phase can be continuously adjusted, thereby enabling flexible control of the power supply device, adapting to different load requirements, and improving the system's adaptability and efficiency.

[0128] like Figure 4 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr Voltage regulating switch S M and S T .

[0129] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer TT The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0130] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding includes a center tap O. Mr Several taps, including the voltage regulating switch S M From including the middle tap O Mr Choose any one of the taps, including the one for voltage regulating switch S. M Lead-out wires, single-phase transformer T Mr The center tap O of the secondary winding Mr With single-phase transformer T M The first end of the secondary winding is connected.

[0131] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding. Single-phase transformer T Tr The secondary winding includes a center tap O. Tr Several taps, including the voltage regulating switch S T From including the middle tap O Tr Choose any one of the taps, including the one for voltage regulating switch S. T Lead wires. Single-phase transformer T Tr The center tap O of the secondary winding Tr Connect voltage regulating switch S M Lead wire.

[0132] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to a voltage regulating switch S. T One lead is connected to the other output terminal, which is connected to a single-phase transformer T. M The second end of the secondary winding.

[0133] Specifically, in this embodiment, the output voltage U TT The formula for calculating the series vector summation of voltage sources is as follows:

[0134]

[0135]

[0136] △U M For single-phase transformer TMr The center tap O of the secondary winding Mr To the voltage regulating switch S M The voltage between the leads represents the voltage across the single-phase transformer T. Mr Secondary output voltage, ΔU T For single-phase transformer T Tr The center tap O of the secondary winding Tr To the voltage regulating switch S T The voltage between the leads represents the voltage across the single-phase transformer T. Tr Secondary output voltage; U M It is a single-phase transformer T M The output voltage of the secondary winding, U T It is a single-phase transformer T T The output voltage of the secondary winding, voltage U M and U T The phase difference is 90°. The output terminal selects only series ΔU based on the connection point. M , △U T and U M Composition of U TT By adjusting the voltage regulating switch S M and S T By adjusting the position of the tap, the actual transformer ratios k1 and k2 are changed, thereby adjusting ΔU. M and △U T The amplitude and polarity (polarity change originates from tap selection direction), combined with a fixed voltage U M To achieve output voltage U TT Amplitude and phase adjustment.

[0137] By introducing a voltage and phase regulating device, including a single-phase transformer T Mr and T Tr and its voltage regulating switch S M and S T A single-phase transformer T combining the SCOTT transformer structure M and T T This makes the output voltage U TT The amplitude and phase can be adjusted independently and flexibly, thereby significantly improving the adaptability and flexibility of the power supply system and meeting different load requirements.

[0138] like Figure 5 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr Voltage regulating switch S M and S T .

[0139] Single-phase transformer TM Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0140] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding includes a center tap O. Mr Several taps, including the voltage regulating switch S M From including the middle tap O Mr Choose any one of the taps, including the one for voltage regulating switch S. M Lead-out wires, single-phase transformer T Mr The center tap O of the secondary winding Mr Connecting single-phase transformer T T The first end of the secondary winding.

[0141] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding. Single-phase transformer T Tr The secondary winding includes a center tap O. Tr Several taps, including the voltage regulating switch S T From including the middle tap O Tr Choose any one of the taps, including the one for voltage regulating switch S. T Lead wires. Single-phase transformer T Tr The center tap O of the secondary winding Tr Connect voltage regulating switch S M Lead wire.

[0142] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to a voltage regulating switch S. T One lead is connected to the other output terminal, which is connected to a single-phase transformer T. T The second end of the secondary winding.

[0143] Specifically, in this embodiment, the output voltage U TT The formula for calculating the series vector summation of voltage sources is as follows:

[0144]

[0145]

[0146] Here, U M It is a single-phase transformer T M The output voltage of the secondary winding, U T It is a single-phase transformer T T The output voltages of the secondary windings are 90° out of phase with each other, ΔU M It is a single-phase transformer T Mr The secondary output voltage is obtained from the center tap O. Mr and voltage regulating switch S M The voltage between the leads is adjustable in amplitude and polarity, ΔU T It is a single-phase transformer T Tr The secondary output voltage is obtained from the center tap O. Tr and voltage regulating switch S T The voltage between the leads is determined, and its amplitude and polarity can be adjusted. This is achieved by adjusting the voltage regulating switch S. M and S T The actual transformer ratios k1 and k2 are changed by adjusting the position of the tap, thereby adjusting ΔU. M and △U T The amplitude and polarity (including positive and negative phase switching), and also due to ΔU M and △U T With a fixed voltage U T The series circuit forms the output loop; changing their vector sum adjusts the output voltage U. TT The overall amplitude and phase.

[0147] By introducing a voltage and phase regulating device, including a single-phase transformer T Mr and T Tr and voltage regulating switch S M and S T The actual turns ratio k1 and k2 are changed by selecting different tap positions using a voltage regulating switch, thereby adjusting ΔU. M and △U T The amplitude and polarity of the voltage U make the output voltage U TT The overall amplitude and phase can be adjusted independently and flexibly, achieving precise control of the power supply voltage and improving the system's adaptability to different load requirements and power supply stability.

[0148] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer, the isolation transformer being used for:

[0149] For the single-phase transformer T Mr The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU. M ;

[0150] and / or;

[0151] For the single-phase transformer T Tr The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU. T ;

[0152] The single-phase output voltage ΔU M and single-phase output voltage ΔU T The phase difference is 90°.

[0153] like Figure 6 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr Voltage regulating switch S M and S T And two isolation transformers.

[0154] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0155] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding includes a center tap O. Mr Several taps, including the voltage regulating switch S M From including the middle tap OMr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. M Lead-out wires, single-phase transformer T Mr The output voltage ΔU is obtained through the isolation transformer. M .

[0156] The two ends of the primary winding of isolation transformer one are respectively connected to single-phase transformer T. Mr The center tap O of the secondary winding Mr and voltage regulating switch S M The leads connect the first end of the secondary winding of isolation transformer one to the second end of the secondary winding of isolation transformer two, and the second end of the secondary winding of isolation transformer one is connected to the single-phase transformer T. M The first end of the secondary winding is connected.

[0157] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T Tr The secondary winding includes a center tap O. Tr Several taps, including the voltage regulating switch S T From including the middle tap O Tr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. T Lead-out wires, single-phase transformer T Tr The output voltage ΔU of the isolation transformer is... T .

[0158] The two ends of the primary winding of isolation transformer 2 are respectively connected to single-phase transformer T. Tr The center tap O of the secondary winding Tr and voltage regulating switch S T The lead wire connects the first end of the secondary winding of isolation transformer two to one output terminal of the flexible in-phase power supply device, and the second end of the secondary winding of isolation transformer two is connected to the first end of the secondary winding of isolation transformer one.

[0159] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to the first end of the secondary winding of isolation transformer II, and the other output terminal is connected to single-phase transformer T. T The second end of the secondary winding.

[0160] Specifically, in this embodiment, the output voltage U TT The formula for calculating the series vector summation of voltage sources is as follows:

[0161]

[0162]

[0163] Where k1 is the single-phase transformer T Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer, ΔU M For single-phase transformer T Mr The center tap O of the secondary winding Mr To the voltage regulating switch S M The voltage between the leads is the voltage output from the isolation transformer, ΔU T For single-phase transformer T Tr The center tap O of the secondary winding Tr To the voltage regulating switch S T The voltage between the leads is the output voltage through isolation transformer two; U M Indicates a single-phase transformer T M The secondary winding output voltage, U T Indicates a single-phase transformer T T The secondary winding output voltage; voltage U M and U T With a phase difference of 90°, both isolation transformers transmit power at a 1:1 ratio. TT It is composed of △U M , △U T U M and U T The vector sum is formed by superimposing these four voltages in series. This can be achieved by adjusting the voltage regulating switch S. M By adjusting the position of the tap, the actual transformer ratio k1 is changed, thereby adjusting ΔU. M The amplitude and polarity (including magnitude and direction); simultaneously, by adjusting the voltage regulating switch S T By changing the position of the tap, the actual transformer ratio k2 is altered, thereby adjusting ΔU. T The amplitude and polarity; due to U TT It is a vector combination of voltages with a 90° phase difference, adjusting ΔU M and △U T The amplitude and polarity will change the total voltage U TT The amplitude and phase, for example, increasing ΔU M When the amplitude or polarity of U is reversed, it will directly affect U. TT The direction and magnitude of the synthesized vector are determined, thereby enabling flexible control of the output voltage.

[0164] By setting up a single-phase transformer T Mr and T Tr Voltage regulating switch S M and S TAnd the voltage and phase regulator of the isolation transformer, compared with the traditional SCOTT transformer structure, makes the output voltage U TT The amplitude and phase can be adjusted independently and continuously, thereby achieving precise and flexible control of the output voltage, improving the adaptability and stability of the power supply system, and meeting the voltage requirements under different load conditions.

[0165] like Figure 7 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr Voltage regulating switch S M and S T Two isolation transformers.

[0166] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0167] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding includes a center tap O. Mr Several taps, including the voltage regulating switch S M From including the middle tap O Mr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. M Lead-out wires, single-phase transformer T Mr The output voltage ΔU is obtained through the isolation transformer. M .

[0168] The two ends of the primary winding of isolation transformer one are respectively connected to single-phase transformer T. Mr The center tap O of the secondary winding Mr and voltage regulating switch S MThe leads connect the first end of the secondary winding of isolation transformer one to the second end of the secondary winding of isolation transformer two, and the second end of the secondary winding of isolation transformer one is connected to the single-phase transformer T. M The first end of the secondary winding is connected.

[0169] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T Tr The secondary winding includes a center tap O. Tr Several taps, including the voltage regulating switch S T From including the middle tap O Tr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. T Lead-out wires, single-phase transformer T Tr The output voltage ΔU of the isolation transformer is... T .

[0170] The two ends of the primary winding of isolation transformer 2 are respectively connected to single-phase transformer T. Tr The center tap O of the secondary winding Tr and voltage regulating switch S T The lead wire connects the first end of the secondary winding of isolation transformer two to one output terminal of the flexible in-phase power supply device, and the second end of the secondary winding of isolation transformer two is connected to the first end of the secondary winding of isolation transformer one.

[0171] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to the first end of the secondary winding of isolation transformer II, and the other output terminal is connected to single-phase transformer T. M The second end of the secondary winding.

[0172] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0173]

[0174]

[0175] △U M For single-phase transformer T Mr The center tap O of the secondary winding Mr To the voltage regulating switch S M The voltage between the leads is the voltage output from the isolation transformer, ΔU T For single-phase transformer T Tr The center tap O of the secondary windingTr To the voltage regulating switch S T The voltage between the leads is the output voltage through isolation transformer two; U M Indicates a single-phase transformer T M The secondary winding output voltage, U T Indicates a single-phase transformer T T The secondary winding output voltage; voltage U M and U T 90° phase difference, U TT It is composed of △U M , △U T and U M This is the vector sum of the three voltages connected in series. The voltage is adjusted by the voltage regulator switch S. M and S T Adjust the position of the tap to connect the single-phase transformer T. Mr The actual turns ratio k1 and the single-phase transformer T Tr The actual turns ratio k2 is used to determine the voltage ΔU. M and △U T The amplitude and polarity are adjusted to control the output voltage U. TT The amplitude and phase are adjusted.

[0176] By adopting the SCOTT transformer wiring structure combined with voltage and phase regulating devices, including single-phase transformer T Mr and T Tr Voltage regulating switch S M and S T And the isolation transformer, so that the output voltage U TT The amplitude and phase can be flexibly adjusted to adapt to different load requirements and achieve precise voltage control; at the same time, the introduction of the isolation transformer provides electrical isolation, enhances the safety and reliability of the system, and avoids the limitations of traditional fixed output power supply devices.

[0177] like Figure 8 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr Voltage regulating switch S M and S T And two isolation transformers.

[0178] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer TT The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0179] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding includes a center tap O. Mr Several taps, including the voltage regulating switch S M From including the middle tap O Mr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. M Lead-out wires, single-phase transformer T Mr The output voltage ΔU is obtained through the isolation transformer. M .

[0180] The two ends of the primary winding of isolation transformer one are respectively connected to single-phase transformer T. Mr The center tap O of the secondary winding Mr and voltage regulating switch S M The leads are connected to the first end of the secondary winding of isolation transformer one and the second end of the secondary winding of isolation transformer two. The second end of the secondary winding of isolation transformer one is connected to single-phase transformer T. T The first end of the secondary winding.

[0181] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T Tr The secondary winding includes a center tap O. Tr Several taps, including the voltage regulating switch S T From including the middle tap O Tr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. T Lead-out wires, single-phase transformer T Tr The output voltage ΔU of the isolation transformer is... T .

[0182] The two ends of the primary winding of isolation transformer 2 are respectively connected to single-phase transformer T. Tr The center tap O of the secondary winding Tr and voltage regulating switch S TThe lead wire connects the first end of the secondary winding of isolation transformer two to one output terminal of the flexible in-phase power supply device, and the second end of the secondary winding of isolation transformer two is connected to the first end of the secondary winding of isolation transformer one.

[0183] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to the first end of the secondary winding of isolation transformer II, and the other output terminal is connected to single-phase transformer T. T The second end of the secondary winding.

[0184] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0185]

[0186]

[0187] △U M For single-phase transformer T Mr The center tap O of the secondary winding Mr To the voltage regulating switch S M The voltage between the leads is the voltage output from the isolation transformer, ΔU T For single-phase transformer T Tr The center tap O of the secondary winding Tr To the voltage regulating switch S T The voltage between the leads is the output voltage through isolation transformer two; U M Indicates a single-phase transformer T M The secondary winding output voltage, U T Indicates a single-phase transformer T T The secondary winding output voltage; voltage U M and U T 90° phase difference, U TT It is composed of △U M , △U T and U T This is the vector sum of the three voltages connected in series. The voltage is adjusted by the voltage regulator switch S. M By adjusting the position of the tap, the actual transformer ratio k1 is changed, thereby adjusting ΔU. M The amplitude and polarity (including magnitude and direction); simultaneously, by adjusting the voltage regulating switch S T By changing the position of the tap, the actual transformer ratio k2 is altered, thereby adjusting ΔU. T The amplitude and polarity; due to U TT It is a vector combination of voltages with a 90° phase difference, adjusting ΔU Mand △U T The amplitude and polarity will change the total voltage U TT The amplitude and phase, for example, increasing ΔU M When the amplitude or polarity of U is reversed, it will directly affect U. TT The direction and magnitude of the synthesized vector are determined, thereby enabling flexible control of the output voltage.

[0188] By adopting a single-phase transformer T Mr T Tr Voltage regulating switch S M and S T The isolation transformer's voltage and phase regulating device structure, combined with the SCOTT transformer wiring foundation, enables independent adjustment of the output voltage U. TT The amplitude and phase of the signal allow for highly flexible power supply control, adapting to diverse load requirements and enhancing system stability and efficiency.

[0189] In some embodiments, the first voltage regulating switch assembly includes a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r The single-pole double-throw switch K Ms Switch K M1r Switch K M2r For switching; single-phase transformer T Mr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two stationary connection terminals; voltage regulating switch S Mr Used to connect the single-phase transformer T Mr The voltage regulating switch S is any one of the multiple taps of the secondary winding. Mr and the switch K M2r The first end is connected via a lead wire; switch K M2r The second-end lead and single-pole double-throw switch K Ms Switch K is connected between the leads of the moving point connection terminal. M1r Switch K M1r The voltage across the terminals is the single-phase output voltage ΔU. M ;

[0190] The second voltage regulating switch assembly includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r The single-pole double-throw switch K Ts Switch K T1r Switch K T2r For switching; single-phase transformer T TrThe two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals; voltage regulating switch S Tr Used to connect the single-phase transformer T Tr The voltage regulating switch S is any one of the multiple taps of the secondary winding. Tr and the switch K T2r The first end is connected via a lead wire; switch K T2r The second-end lead and single-pole double-throw switch K Ts Switch K is connected between the leads of the moving point connection terminal. T1r Switch K T1r The voltage across the terminals is the single-phase output voltage ΔU. T .

[0191] Figure 9 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr First voltage regulating switch assembly S M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r ).

[0192] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0193] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. MThe two ends of the secondary winding, single-phase transformer T Mr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two stationary connection terminals, single-phase transformer T Mr The secondary winding contains several taps, and the voltage regulating switch S Mr One tap can be randomly selected from several taps as the voltage regulating switch S. Mr Lead wire, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first terminal, switch K M2r The second end and single-pole double-throw switch K Ms Switch K is connected between the moving point connection terminals. M1r Switch K M1r The voltage at both ends constitutes a single-phase transformer T. Mr Secondary winding output voltage.

[0194] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding, single-phase transformer T Tr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals, single-phase transformer T Tr The secondary winding contains several taps, and the voltage regulating switch S Tr One tap can be randomly selected from several taps as the voltage regulating switch S. Tr Lead wire, voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first terminal, switch K T2r The second end and single-pole double-throw switch K Ts Switch K is connected between the moving point connection terminals. T1r Switch K T1r The voltage at both ends constitutes a single-phase transformer T. Tr Secondary winding output voltage.

[0195] Single-pole double-throw switch K Ts Moving point connection terminal and switch K M2r The second end is connected to a single-pole double-throw switch K. Ms Moving point connection terminal and single-phase transformer T M The first end of the secondary winding is connected.

[0196] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to switch K. T2r The second terminal, and the other output terminal, are connected to a single-phase transformer T. T The second end of the secondary winding.

[0197] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0198]

[0199]

[0200] Where k1 is the single-phase transformer T Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer, ΔU M For single-phase transformer T Mr Secondary output voltage, ΔU T For single-phase transformer T Tr Secondary output voltage, U M For single-phase transformer T M The output voltage of the secondary winding, U T For single-phase transformer T T The output voltage of the secondary winding, voltage U M and U T Phase difference 90°; Output voltage U TT The adjustment is achieved by operating the first voltage regulating switch assembly S. M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r To achieve this, the switch K is first disconnected during normal operation. M1r or K T1r And close switch K M2r or K T2r Single-pole double-throw switch K Ms or K Ts Select a static point to connect, and adjust the voltage regulating switch S. Mr or S Tr The position of the switch tap is changed to alter the actual transformer ratio k1 or k2, thereby adjusting ΔU. M or △U T The amplitude; when it is necessary to switch polarity, for example in the voltage regulating switch S Mr After dynamically adjusting to the zero output point, close switch K in sequence. M1r , breaking K M2rSwitch the single-pole double-throw switch K Ms To another static point, close K again. M2r And break K M1r Complete △U M Polarity switching and amplitude adjustment in opposite ranges are similar to adjusting ΔU. T ; through collaborative changes in △U M and △U T The amplitude and polarity of U are used to achieve U TT Amplitude and phase adjustment.

[0201] Single-phase transformer T Mr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The switches are adjusted in coordination. Under normal operating conditions, switch K... M1r Disconnect, switch K M2r Closed, single-pole double-throw switch K Ms Select one of the static points to connect, and switch the voltage regulator S. Mr By adjusting the single-phase transformer T Mr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Mr During dynamic adjustment, when the voltage regulating switch S Mr Adjust to single-pole double-throw switch K Ms The single-phase transformer T connected to the static point Mr When one end of the secondary winding is connected, the single-phase transformer T Mr The secondary output voltage is 0; at this time, switch K is closed sequentially. M1r Disconnect switch K M2r The single-pole double-throw switch K Ms Switch to connect another static point by turning on the voltage regulating switch S. Mr Connected to single-phase transformer T Mr At the other end of the secondary winding, close switch K. M2r Disconnect switch K M1r At this point, the single-phase transformer T is completed by switching the switch. Mr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Mr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0202] Single-phase transformer T Tr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2rThe switches are adjusted in coordination. Under normal operating conditions, switch K... T1r Disconnect, switch K T2r Closed, single-pole double-throw switch K Ts Select one of the static points to connect, and switch the voltage regulator S. Tr By adjusting the single-phase transformer T Tr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Tr During dynamic adjustment, when the voltage regulating switch S Tr Adjust to single-pole double-throw switch K Ts The single-phase transformer T connected to the static point Tr When one end of the secondary winding is connected, the single-phase transformer T Tr The secondary output voltage is 0; at this time, switch K is closed sequentially. T1r Disconnect switch K T2r The single-pole double-throw switch K Ts Switch to connect another static point by turning on the voltage regulating switch S. Tr Connected to single-phase transformer T Tr At the other end of the secondary winding, close switch K. T2r Disconnect switch K T1r At this point, the single-phase transformer T is completed by switching the switch. Tr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Tr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0203] By setting up voltage and phase regulators, the amplitude and phase of the output voltage can be adjusted independently and collaboratively, achieving continuous and uninterrupted polarity switching and amplitude control, thereby significantly improving the flexibility and adaptability of the power supply system and meeting diverse load requirements.

[0204] like Figure 10 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr First voltage regulating switch assembly S M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r ).

[0205] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0206] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding, single-phase transformer T Mr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two stationary connection terminals, single-phase transformer T Mr The secondary winding contains several taps, and the voltage regulating switch S Mr One tap can be randomly selected from several taps as the voltage regulating switch S. Mr Lead wire, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first terminal, switch K M2r The second end and single-pole double-throw switch K Ms Switch K is connected between the moving point connection terminals. M1r Switch K M1r The voltage at both ends constitutes a single-phase transformer T. Mr Secondary winding output voltage.

[0207] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding, single-phase transformer T Tr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals, single-phase transformer T Tr The secondary winding contains several taps, and the voltage regulating switch S Tr One tap can be randomly selected from several taps as the voltage regulating switch S. Tr Lead wire, voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first terminal, switch K T2r The second end and single-pole double-throw switch KTs Switch K is connected between the moving point connection terminals. T1r Switch K T1r The voltage at both ends constitutes a single-phase transformer T. Tr Secondary winding output voltage.

[0208] Single-pole double-throw switch K Ts Moving point connection terminal and switch K M2r The second end is connected to a single-pole double-throw switch K. Ms Moving point connection terminal and single-phase transformer T M The first end of the secondary winding is connected.

[0209] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to switch K. T2r The second terminal, and the other output terminal, are connected to a single-phase transformer T. M The second end of the secondary winding.

[0210] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0211]

[0212]

[0213] Where k1 is the single-phase transformer T Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer, ΔU M For single-phase transformer T Mr Secondary output voltage, ΔU T For single-phase transformer T Tr Secondary output voltage, U M For single-phase transformer T M The output voltage of the secondary winding, U T For single-phase transformer T T The output voltage of the secondary winding, voltage U M and U T Phase difference 90°; Output voltage U TT The adjustment is achieved by operating the first voltage regulating switch assembly S. M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T(including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r To achieve this, the switch K is first disconnected during normal operation. M1r or K T1r And close switch K M2r or K T2r Single-pole double-throw switch K Ms or K Ts Select a static point to connect, and adjust the voltage regulating switch S. Mr or S Tr The position of the switch tap is changed to alter the actual transformer ratio k1 or k2, thereby adjusting ΔU. M or △U T The amplitude; when it is necessary to switch polarity, for example in the voltage regulating switch S Mr After dynamically adjusting to the zero output point, close switch K in sequence. M1r , breaking K M2r Switch the single-pole double-throw switch K Ms To another static point, close K again. M2r And break K M1r Complete △U M Polarity switching and amplitude adjustment in opposite ranges are similar to adjusting ΔU. T ; through collaborative changes in △U M and △U T The amplitude and polarity of U are used to achieve U TT Amplitude and phase adjustment.

[0214] Single-phase transformer T Mr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The switches are adjusted in coordination. Under normal operating conditions, switch K... M1r Disconnect, switch K M2r Closed, single-pole double-throw switch K Ms Select one of the static points to connect, and switch the voltage regulator S. Mr By adjusting the single-phase transformer T Mr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Mr During dynamic adjustment, when the voltage regulating switch S Mr Adjust to single-pole double-throw switch K Ms The single-phase transformer T connected to the static point Mr When one end of the secondary winding is connected, the single-phase transformer T Mr The secondary output voltage is 0; at this time, switch K is closed sequentially. M1rDisconnect switch K M2r The single-pole double-throw switch K Ms Switch to connect another static point by turning on the voltage regulating switch S. Mr Connected to single-phase transformer T Mr At the other end of the secondary winding, close switch K. M2r Disconnect switch K M1r At this point, the single-phase transformer T is completed by switching the switch. Mr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Mr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0215] Single-phase transformer T Tr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r The switches are adjusted in coordination. Under normal operating conditions, switch K... T1r Disconnect, switch K T2r Closed, single-pole double-throw switch K Ts Select one of the static points to connect, and switch the voltage regulator S. Tr By adjusting the single-phase transformer T Tr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Tr During dynamic adjustment, when the voltage regulating switch S Tr Adjust to single-pole double-throw switch K Ts The single-phase transformer T connected to the static point Tr When one end of the secondary winding is connected, the single-phase transformer T Tr The secondary output voltage is 0; at this time, switch K is closed sequentially. T1r Disconnect switch K T2r The single-pole double-throw switch K Ts Switch to connect another static point by turning on the voltage regulating switch S. Tr Connected to single-phase transformer T Tr At the other end of the secondary winding, close switch K. T2r Disconnect switch K T1r At this point, the single-phase transformer T is completed by switching the switch. Tr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Tr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0216] The first voltage regulating switch assembly enables ΔU M and ΔU TThe amplitude and polarity can be flexibly adjusted, thus relating to U M Combined to achieve output voltage U TT The independent adjustment of amplitude and phase overcomes the limitations of inflexible adjustment in traditional power supply devices, and improves the adaptability, stability and ease of operation of the power supply system.

[0217] like Figure 11 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr First voltage regulating switch assembly S M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r ).

[0218] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0219] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding, single-phase transformer T Mr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two stationary connection terminals, single-phase transformer T Mr The secondary winding contains several taps, and the voltage regulating switch S Mr One tap can be randomly selected from several taps as the voltage regulating switch S. Mr Lead wire, voltage regulating switch SMr The lead wire is connected to switch K. M2r The first terminal, switch K M2r The second end and single-pole double-throw switch K Ms Switch K is connected between the moving point connection terminals. M1r Switch K M1r The voltage at both ends constitutes a single-phase transformer T. Mr Secondary winding output voltage.

[0220] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding, single-phase transformer T Tr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals, single-phase transformer T Tr The secondary winding contains several taps, and the voltage regulating switch S Tr One tap can be randomly selected from several taps as the voltage regulating switch S. Tr Lead wire, voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first terminal, switch K T2r The second end and single-pole double-throw switch K Ts Switch K is connected between the moving point connection terminals. T1r Switch K T1r The voltage at both ends constitutes a single-phase transformer T. Tr Secondary winding output voltage.

[0221] Single-pole double-throw switch K Ts Moving point connection terminal and switch K M2r The second end is connected to a single-pole double-throw switch K. Ms Moving point connection terminal and single-phase transformer T T The first end of the secondary winding is connected.

[0222] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to switch K. T2r The second terminal, and the other output terminal, are connected to a single-phase transformer T. T The second end of the secondary winding.

[0223] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0224]

[0225]

[0226] Where k1 is the single-phase transformer T Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer, ΔU M For single-phase transformer T Mr Secondary output voltage, ΔU T For single-phase transformer T Tr Secondary output voltage, U M For single-phase transformer T M The output voltage of the secondary winding, U T For single-phase transformer T T The output voltage of the secondary winding, voltage U M and U T Phase difference 90°; Output voltage U TT The adjustment is achieved by operating the first voltage regulating switch assembly S. M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r To achieve this, the switch K is first disconnected during normal operation. M1r or K T1r And close switch K M2r or K T2r Single-pole double-throw switch K Ms or K Ts Select a static point to connect, and adjust the voltage regulating switch S. Mr or S Tr The position of the switch tap is changed to alter the actual transformer ratio k1 or k2, thereby adjusting ΔU. M or △U T The amplitude; when it is necessary to switch polarity, for example in the voltage regulating switch S Mr After dynamically adjusting to the zero output point, close switch K in sequence. M1r , breaking K M2r Switch the single-pole double-throw switch K Ms To another static point, close K again. M2r And break K M1r Complete △U M Polarity switching and amplitude adjustment in opposite ranges are similar to adjusting ΔU. T ; through collaborative changes in △U M and △U TThe amplitude and polarity of U are used to achieve U TT Amplitude and phase adjustment.

[0227] Single-phase transformer T Mr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The switches are adjusted in coordination. Under normal operating conditions, switch K... M1r Disconnect, switch K M2r Closed, single-pole double-throw switch K Ms Select one of the static points to connect, and switch the voltage regulator S. Mr By adjusting the single-phase transformer T Mr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Mr During dynamic adjustment, when the voltage regulating switch S Mr Adjust to single-pole double-throw switch K Ms The single-phase transformer T connected to the static point Mr When one end of the secondary winding is connected, the single-phase transformer T Mr The secondary output voltage is 0; at this time, switch K is closed sequentially. M1r Disconnect switch K M2r The single-pole double-throw switch K Ms Switch to connect another static point by turning on the voltage regulating switch S. Mr Connected to single-phase transformer T Mr At the other end of the secondary winding, close switch K. M2r Disconnect switch K M1r At this point, the single-phase transformer T is completed by switching the switch. Mr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Mr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0228] Single-phase transformer T Tr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r The switches are adjusted in coordination. Under normal operating conditions, switch K... T1r Disconnect, switch K T2r Closed, single-pole double-throw switch K Ts Select one of the static points to connect, and switch the voltage regulator S. Tr By adjusting the single-phase transformer T Tr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... TrDuring dynamic adjustment, when the voltage regulating switch S Tr Adjust to single-pole double-throw switch K Ts The single-phase transformer T connected to the static point Tr When one end of the secondary winding is connected, the single-phase transformer T Tr The secondary output voltage is 0; at this time, switch K is closed sequentially. T1r Disconnect switch K T2r The single-pole double-throw switch K Ts Switch to connect another static point by turning on the voltage regulating switch S. Tr Connected to single-phase transformer T Tr At the other end of the secondary winding, close switch K. T2r Disconnect switch K T1r At this point, the single-phase transformer T is completed by switching the switch. Tr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Tr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0229] Through single-phase transformer T Mr and T Tr With single-pole double-throw switch K Ms K Ts Voltage regulating switch S Mr S Tr and switch K M1r K M2r K T1r K T2r Coordinated operation to adjust ΔU M and ΔU T The amplitude and polarity of the voltage U make the output voltage U TT The amplitude and phase can be continuously and flexibly controlled to adapt to different load requirements and improve the adaptability and efficiency of the power supply system.

[0230] like Figure 12 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr First voltage regulating switch assembly S M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch KT2r ) and two isolation transformers.

[0231] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding, single-phase transformer T Mr The secondary winding of a single-phase transformer T contains several taps. Mr The two ends of the secondary winding are respectively connected to the first voltage regulating switch assembly S. M The two input terminals, one of which has several taps, are connected to the first voltage regulating switch assembly S. M The selection end;

[0232] First voltage regulating switch assembly S M Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r Single-pole double-throw switch K Ms The two static connection terminals are the input terminals of the first voltage regulating switch assembly, voltage regulating switch S Mr As the first voltage regulating switch assembly S M Selection terminal, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1r Switch K M2r The second end and single-pole double-throw switch K Ms The moving point connection terminal serves as the first voltage regulating switch assembly S M The two output terminals.

[0233] The primary side of isolation transformer one is connected to the first voltage regulating switch assembly S. M The output terminal of the single-phase transformer T is connected in series with the secondary side in the output circuit, making the single-phase transformer T Mr The secondary voltage can be output after being isolated by an isolation transformer.

[0234] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding, single-phase transformer T Tr The secondary winding of a single-phase transformer T contains several taps. Tr The two ends of the secondary winding are respectively connected to the second voltage regulating switch assembly S. T The two input terminals, one of which has several taps, are connected to the second voltage regulating switch assembly S. T The selection end;

[0235] Second voltage regulating switch assembly ST Including single-pole double-throw switch K Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r Single-pole double-throw switch K Ts The two static connection terminals are the input terminals of the second voltage regulating switch assembly, voltage regulating switch S Tr As the second voltage regulating switch component S T Selection terminal, voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r Switch K T2r The second end and single-pole double-throw switch K Ts The moving point connection terminal serves as the second voltage regulating switch assembly S T The two output terminals.

[0236] The primary side of isolation transformer two is connected to the second voltage regulating switch assembly S. T The output terminal of the single-phase transformer T is connected in series with the secondary side in the output circuit, making the single-phase transformer T Tr The secondary voltage can be output after being isolated by an isolation transformer.

[0237] The flexible in-phase power supply device has two output terminals. In this embodiment, these are the secondary windings of isolation transformer one, isolation transformer two, and single-phase transformer T. M Secondary winding, single-phase transformer T T After the secondary windings are connected in series, the two ports formed are the output terminals of the flexible in-phase power supply device.

[0238] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0239]

[0240]

[0241] Where k1 is the single-phase transformer T Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer, ΔU M For single-phase transformer T Mr The voltage output from the secondary side through the isolation transformer, ΔU T For single-phase transformer T TrThe voltage output from the secondary side through isolation transformer two; U M Indicates a single-phase transformer T M The secondary winding output voltage, U T Indicates a single-phase transformer T T The secondary winding output voltage; voltage U M and U T With a phase difference of 90°, both isolation transformers transmit power at a 1:1 ratio. TT It is composed of △U M , △U T U M and U T The vector sum of these four voltages, superimposed in series. Output voltage U TT The adjustment is achieved by operating the first voltage regulating switch assembly S. M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r To achieve this, the switch K is first disconnected during normal operation. M1r or K T1r And close switch K M2r or K T2r Single-pole double-throw switch K Ms or K Ts Select a static point to connect, and adjust the voltage regulating switch S. Mr or S Tr The position of the switch tap is changed to alter the actual transformer ratio k1 or k2, thereby adjusting ΔU. M or △U T The amplitude; when it is necessary to switch polarity, for example in the voltage regulating switch S Mr After dynamically adjusting to the zero output point, close switch K in sequence. M1r , breaking K M2r Switch the single-pole double-throw switch K Ms To another static point, close K again. M2r And break K M1r Complete △U M Polarity switching and amplitude adjustment in opposite ranges are similar to adjusting ΔU. T ; through collaborative changes in △U M and △U T The amplitude and polarity of U are used to achieve U TT Amplitude and phase adjustment.

[0242] Single-phase transformer TMr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The switches are adjusted in coordination. Under normal operating conditions, switch K... M1r Disconnect, switch K M2r Closed, single-pole double-throw switch K Ms Select one of the static points to connect, and switch the voltage regulator S. Mr By adjusting the single-phase transformer T Mr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Mr During dynamic adjustment, when the voltage regulating switch S Mr Adjust to single-pole double-throw switch K Ms The single-phase transformer T connected to the static point Mr When one end of the secondary winding is connected, the single-phase transformer T Mr The secondary output voltage is 0; at this time, switch K is closed sequentially. M1r Disconnect switch K M2r The single-pole double-throw switch K Ms Switch to connect another static point by turning on the voltage regulating switch S. Mr Connected to single-phase transformer T Mr At the other end of the secondary winding, close switch K. M2r Disconnect switch K M1r At this point, the single-phase transformer T is completed by switching the switch. Mr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Mr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0243] Single-phase transformer T Tr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r The switches are adjusted in coordination. Under normal operating conditions, switch K... T1r Disconnect, switch K T2r Closed, single-pole double-throw switch K Ts Select one of the static points to connect, and switch the voltage regulator S. Tr By adjusting the single-phase transformer T Tr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Tr During dynamic adjustment, when the voltage regulating switch S Tr Adjust to single-pole double-throw switch K TsThe single-phase transformer T connected to the static point Tr When one end of the secondary winding is connected, the single-phase transformer T Tr The secondary output voltage is 0; at this time, switch K is closed sequentially. T1r Disconnect switch K T2r The single-pole double-throw switch K Ts Switch to connect another static point by turning on the voltage regulating switch S. Tr Connected to single-phase transformer T Tr At the other end of the secondary winding, close switch K. T2r Disconnect switch K T1r At this point, the single-phase transformer T is completed by switching the switch. Tr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Tr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0244] By introducing a voltage and phase regulating device assembly, including a single-phase transformer T Mr and T Tr The first voltage regulating switch assembly, the second voltage regulating switch assembly, and the isolation transformer, by changing the operating states of the switches, such as switching the static point, selecting the tap position, and the opening and closing sequence, enable the output voltage U to be adjusted. TT The amplitude and phase can be continuously adjusted, thereby realizing the flexibility and adaptability of the power supply system and meeting different load requirements.

[0245] like Figure 13 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr First voltage regulating switch assembly S M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r ) and two isolation transformers.

[0246] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. MConnecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0247] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding, single-phase transformer T Mr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two stationary connection terminals, single-phase transformer T Mr The secondary winding contains several taps, and the voltage regulating switch S Mr One tap can be randomly selected from several taps as the voltage regulating switch S. Mr Lead wire, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1r The two ends of the primary winding of isolation transformer one are respectively connected to single-pole double-throw switches K. Ms Moving point connection terminal and switch K M2r The second end of the secondary winding of isolation transformer one is connected to the second end of the secondary winding of isolation transformer two, and the second end of the secondary winding of isolation transformer one is connected to the single-phase transformer T. M The first end of the secondary winding is connected.

[0248] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding, single-phase transformer T Tr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals, single-phase transformer T Tr The secondary winding contains several taps, and the voltage regulating switch S Tr One tap can be randomly selected from several taps as the voltage regulating switch S. Tr Lead wire, voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2rSwitch K is connected between the second end. T1r The two ends of the primary winding of isolation transformer two are respectively connected to single-pole double-throw switches K. Ts Moving point connection terminal and switch K T2r The second end of the secondary winding of the second isolation transformer is connected to the first end of the secondary winding of the first isolation transformer. The second end of the secondary winding of the second isolation transformer is connected to the first end of the secondary winding of the first isolation transformer.

[0249] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to switch K. T2r The second terminal, and the other output terminal, are connected to a single-phase transformer T. M The second end of the secondary winding.

[0250] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0251]

[0252]

[0253] Where k1 is the single-phase transformer T Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer, ΔU M For single-phase transformer T Mr The voltage output from the secondary side through the isolation transformer, ΔU T For single-phase transformer T Tr The voltage output from the secondary side through isolation transformer two; U M Indicates a single-phase transformer T M The secondary winding output voltage, U T Indicates a single-phase transformer T T The secondary winding output voltage; voltage U M and U T With a phase difference of 90°, both isolation transformers transmit power at a 1:1 ratio. TT It is composed of △U M , △U T U M and U T The vector sum of these four voltages, superimposed in series. Output voltage U TT The adjustment is achieved by operating the first voltage regulating switch assembly S. M (including single-pole double-throw switch K) Ms Voltage regulating switch S MrSwitch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r To achieve this, the switch K is first disconnected during normal operation. M1r or K T1r And close switch K M2r or K T2r Single-pole double-throw switch K Ms or K Ts Select a static point to connect, and adjust the voltage regulating switch S. Mr or S Tr The position of the switch tap is changed to alter the actual transformer ratio k1 or k2, thereby adjusting ΔU. M or △U T The amplitude; when it is necessary to switch polarity, for example in the voltage regulating switch S Mr After dynamically adjusting to the zero output point, close switch K in sequence. M1r , breaking K M2r Switch the single-pole double-throw switch K Ms To another static point, close K again. M2r And break K M1r Complete △U M Polarity switching and amplitude adjustment in opposite ranges are similar to adjusting ΔU. T ; through collaborative changes in △U M and △U T The amplitude and polarity of U are used to achieve U TT Amplitude and phase adjustment.

[0254] Single-phase transformer T Mr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The switches are adjusted in coordination. Under normal operating conditions, switch K... M1r Disconnect, switch K M2r Closed, single-pole double-throw switch K Ms Select one of the static points to connect, and switch the voltage regulator S. Mr By adjusting the single-phase transformer T Mr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Mr During dynamic adjustment, when the voltage regulating switch S Mr Adjust to single-pole double-throw switch K Ms The single-phase transformer T connected to the static point MrWhen one end of the secondary winding is connected, the single-phase transformer T Mr The secondary output voltage is 0; at this time, switch K is closed sequentially. M1r Disconnect switch K M2r The single-pole double-throw switch K Ms Switch to connect another static point by turning on the voltage regulating switch S. Mr Connected to single-phase transformer T Mr At the other end of the secondary winding, close switch K. M2r Disconnect switch K M1r At this point, the single-phase transformer T is completed by switching the switch. Mr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Mr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0255] Single-phase transformer T Tr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r The switches are adjusted in coordination. Under normal operating conditions, switch K... T1r Disconnect, switch K T2r Closed, single-pole double-throw switch K Ts Select one of the static points to connect, and switch the voltage regulator S. Tr By adjusting the single-phase transformer T Tr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Tr During dynamic adjustment, when the voltage regulating switch S Tr Adjust to single-pole double-throw switch K Ts The single-phase transformer T connected to the static point Tr When one end of the secondary winding is connected, the single-phase transformer T Tr The secondary output voltage is 0; at this time, switch K is closed sequentially. T1r Disconnect switch K T2r The single-pole double-throw switch K Ts Switch to connect another static point by turning on the voltage regulating switch S. Tr Connected to single-phase transformer T Tr At the other end of the secondary winding, close switch K. T2r Disconnect switch K T1r At this point, the single-phase transformer T is completed by switching the switch. Tr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Tr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0256] By introducing a voltage and phase regulator and combining it with the traditional SCOTT transformer structure, the voltage and phase regulator includes a single-phase transformer T Mr Single-phase transformer T Tr The first voltage regulating switch assembly, the second voltage regulating switch assembly, and the isolation transformer enable dynamic adjustment of the voltage regulating switch S. Mr and S Tr The tap positions are changed to alter the turns ratios k1 and k2, and the polarity is switched at zero voltage using a single-pole double-throw switch, thereby continuously regulating the output voltage U. TT The amplitude and phase of the transformer provide higher voltage regulation accuracy and phase control flexibility compared to traditional fixed-output SCOTT transformers, adapting to diverse load requirements and improving the efficiency and stability of the power supply system.

[0257] like Figure 14 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr and single-phase transformer T Tr First voltage regulating switch assembly S M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r ) and two isolation transformers.

[0258] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0259] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends.M The two ends of the secondary winding, single-phase transformer T Mr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two stationary connection terminals, single-phase transformer T Mr The secondary winding contains several taps, and the voltage regulating switch S Mr One tap can be randomly selected from several taps as the voltage regulating switch S. Mr Lead wire, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1r The two ends of the primary winding of isolation transformer one are respectively connected to single-pole double-throw switches K. Ms Moving point connection terminal and switch K M2r The second end of the secondary winding of isolation transformer one is connected to the second end of the secondary winding of isolation transformer two, and the second end of the secondary winding of isolation transformer one is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0260] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding, single-phase transformer T Tr The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals, single-phase transformer T Tr The secondary winding contains several taps, and the voltage regulating switch S Tr One tap can be randomly selected from several taps as the voltage regulating switch S. Tr Lead wire, voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r The two ends of the primary winding of isolation transformer two are respectively connected to single-pole double-throw switches K. Ts Moving point connection terminal and switch K T2r The second end of the secondary winding of the second isolation transformer is connected to the first end of the secondary winding of the first isolation transformer. The second end of the secondary winding of the second isolation transformer is connected to the first end of the secondary winding of the first isolation transformer.

[0261] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to switch K. T2rThe second terminal, and the other output terminal, are connected to a single-phase transformer T. T The second end of the secondary winding.

[0262] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0263]

[0264]

[0265] Where k1 is the single-phase transformer T Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer, ΔU M For single-phase transformer T Mr The voltage output from the secondary side through the isolation transformer, ΔU T For single-phase transformer T Tr The voltage output from the secondary side through isolation transformer two; U M Indicates a single-phase transformer T M The secondary winding output voltage, U T Indicates a single-phase transformer T T The secondary winding output voltage; voltage U M and U T With a phase difference of 90°, both isolation transformers transmit power at a 1:1 ratio. TT It is composed of △U M , △U T U M and U T The vector sum of these four voltages, superimposed in series. Output voltage U TT The adjustment is achieved by operating the first voltage regulating switch assembly S. M (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r and the second voltage regulating switch assembly S T (including single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r To achieve this, the switch K is first disconnected during normal operation. M1r or K T1r And close switch K M2r or K T2r Single-pole double-throw switch K Ms or K TsSelect a static point to connect, and adjust the voltage regulating switch S. Mr or S Tr The position of the switch tap is changed to alter the actual transformer ratio k1 or k2, thereby adjusting ΔU. M or △U T The amplitude; when it is necessary to switch polarity, for example in the voltage regulating switch S Mr After dynamically adjusting to the zero output point, close switch K in sequence. M1r , breaking K M2r Switch the single-pole double-throw switch K Ms To another static point, close K again. M2r And break K M1r Complete △U M Polarity switching and amplitude adjustment in opposite ranges are similar to adjusting ΔU. T ; through collaborative changes in △U M and △U T The amplitude and polarity of U are used to achieve U TT Amplitude and phase adjustment.

[0266] Single-phase transformer T Mr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The switches are adjusted in coordination. Under normal operating conditions, switch K... M1r Disconnect, switch K M2r Closed, single-pole double-throw switch K Ms Select one of the static points to connect, and switch the voltage regulator S. Mr By adjusting the single-phase transformer T Mr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Mr During dynamic adjustment, when the voltage regulating switch S Mr Adjust to single-pole double-throw switch K Ms The single-phase transformer T connected to the static point Mr When one end of the secondary winding is connected, the single-phase transformer T Mr The secondary output voltage is 0; at this time, switch K is closed sequentially. M1r Disconnect switch K M2r The single-pole double-throw switch K Ms Switch to connect another static point by turning on the voltage regulating switch S. Mr Connected to single-phase transformer T Mr At the other end of the secondary winding, close switch K. M2r Disconnect switch K M1r At this point, the single-phase transformer T is completed by switching the switch. Mr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S.Mr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0267] Single-phase transformer T Tr The amplitude and polarity of the secondary output voltage are determined by a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r The switches are adjusted in coordination. Under normal operating conditions, switch K... T1r Disconnect, switch K T2r Closed, single-pole double-throw switch K Ts Select one of the static points to connect, and switch the voltage regulator S. Tr By adjusting the single-phase transformer T Tr The voltage amplitude is adjusted by selecting the taps on the secondary winding; the voltage regulating switch S... Tr During dynamic adjustment, when the voltage regulating switch S Tr Adjust to single-pole double-throw switch K Ts The single-phase transformer T connected to the static point Tr When one end of the secondary winding is connected, the single-phase transformer T Tr The secondary output voltage is 0; at this time, switch K is closed sequentially. T1r Disconnect switch K T2r The single-pole double-throw switch K Ts Switch to connect another static point by turning on the voltage regulating switch S. Tr Connected to single-phase transformer T Tr At the other end of the secondary winding, close switch K. T2r Disconnect switch K T1r At this point, the single-phase transformer T is completed by switching the switch. Tr The polarity of the secondary output voltage is switched by adjusting the voltage regulating switch S. Tr Adjusting the single-phase transformer T in another polarity range Mr The amplitude of the secondary output voltage.

[0268] By introducing a voltage and phase regulator and combining it with the traditional SCOTT transformer structure, the voltage and phase regulator includes a single-phase transformer T Mr Single-phase transformer T Tr The first voltage regulating switch assembly, the second voltage regulating switch assembly, and the isolation transformer enable dynamic adjustment of the voltage regulating switch S. Mr and S Tr The tap positions are changed to alter the turns ratios k1 and k2, and the polarity is switched at zero voltage using a single-pole double-throw switch, thereby continuously regulating the output voltage U. TTThe amplitude and phase of the transformer provide higher voltage regulation accuracy and phase control flexibility compared to traditional fixed-output SCOTT transformers, adapting to diverse load requirements and improving the efficiency and stability of the power supply system.

[0269] like Figure 15 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr Single-phase transformer T Tr Voltage regulating switch S M and S T Two isolation transformers and a continuously adjustable voltage source CPSD.

[0270] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0271] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding includes a center tap O. Mr Several taps, including the voltage regulating switch S M From including the middle tap O Mr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. M Lead-out wires, single-phase transformer T Mr The output voltage ΔU is obtained through the isolation transformer. M .

[0272] The two ends of the primary winding of isolation transformer one are respectively connected to single-phase transformer T. Mr The center tap O of the secondary winding Mr and voltage regulating switch S MThe leads connect the first end of the secondary winding of isolation transformer one to the second end of the secondary winding of isolation transformer two, and the second end of the secondary winding of isolation transformer one is connected to the single-phase transformer T. M The first end of the secondary winding is connected.

[0273] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T Tr The secondary winding includes a center tap O. Tr Several taps, including the second voltage regulating switch assembly S T From including the middle tap O Tr Choose any one of the several taps, including the second voltage regulating switch assembly S. T Lead-out wires, single-phase transformer T Tr The output voltage ΔU of the isolation transformer is... T .

[0274] The two ends of the primary winding of isolation transformer 2 are respectively connected to single-phase transformer T. Tr The center tap O of the secondary winding Tr Second voltage regulating switch assembly S T The lead wire connects the first end of the secondary winding of isolation transformer two to one output terminal of the flexible in-phase power supply device, and the second end of the secondary winding of isolation transformer two is connected to the first end of the secondary winding of isolation transformer one.

[0275] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to the first end of the secondary winding of isolation transformer II, and the other output terminal is connected to single-phase transformer T. T The second end of the secondary winding.

[0276] The flexible in-phase power supply device also includes a continuously adjustable voltage source CPSD, with the output voltage U input in series. TT In the output circuit, the voltage regulating switch S M and S T Coarse adjustment is performed, and fine adjustment is performed using the voltage source CPSD via the voltage regulating switch S. M and S T It works in conjunction with a continuously adjustable voltage source CPSD to achieve continuous adjustment of the output voltage amplitude and phase of the flexible in-phase power supply device.

[0277] like Figure 15 The diagram shows one embodiment of this flexible in-phase power supply device, in which the voltage source CPSD is connected in series with the single-phase transformer T. TAfter the second end of the secondary winding, specifically, the first port of the continuously adjustable voltage source CPSD is connected to the single-phase transformer T. T The second terminal of the secondary winding, and the second port of the continuously adjustable voltage source CPSD, are connected to the other output terminal of the flexible in-phase power supply device. At this time, the output voltage U TT To Figure 6 Output voltage U TT In addition to the output circuit, a voltage source CPSD is added.

[0278] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0279]

[0280]

[0281] Among them, U M Indicates a single-phase transformer T M The secondary winding output voltage, U T Indicates a single-phase transformer T T The secondary winding output voltage; voltage U M and U T With a phase difference of 90°, both isolation transformers transmit power at a 1:1 ratio, ΔU M For single-phase transformer T Mr The center tap O of the secondary winding Mr To the voltage regulating switch S M The voltage between the leads is the voltage output from the isolation transformer, ΔU T For single-phase transformer T Tr The center tap O of the secondary winding Tr To the voltage regulating switch S T The voltage between the leads is the output voltage through isolation transformer II, where k1 is the voltage of single-phase transformer T. Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer; U TT It is composed of △U M , △U T U M and U T , △U CPSD The vector sum is formed by superimposing these five voltages in series. This is achieved by adjusting the voltage regulating switch S. M By adjusting the position of the tap, the actual transformer ratio k1 is changed, thereby adjusting ΔU. M The amplitude and polarity (including magnitude and direction); simultaneously, by adjusting the voltage regulating switch ST By changing the position of the tap, the actual transformer ratio k2 is altered, thereby adjusting ΔU. T The amplitude and polarity of △U. CPSD Additional voltage component generated by the continuously adjustable voltage source CPSD.

[0282] Through the voltage regulating switch S M and S T Select single-phase transformer T Mr and T Tr The tap position of the secondary winding is coarsely adjusted by the voltage component ΔU. M and △U T The amplitude and polarity are determined by continuously adjusting ΔU using a voltage source CPSD. CPSD Fine-tuning is performed to make the output voltage U TT The amplitude and phase can be continuously and precisely coordinated, thereby improving the flexibility and control accuracy of the power supply system and reducing the dependence of traditional voltage regulating equipment on independent adjustment of phase and amplitude.

[0283] like Figure 16 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T Mr Single-phase transformer T Tr Voltage regulating switch S M and S T Two isolation transformers and continuously adjustable voltage sources CPSD1 and CPSD2.

[0284] Single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer, a single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The first end of the secondary winding is connected.

[0285] Single-phase transformer T Mr The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T Mr The secondary winding includes a center tap O.Mr Several taps, including the voltage regulating switch S M From including the middle tap O Mr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. M Lead wire.

[0286] Single-phase transformer T Tr The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T Tr The secondary winding includes a center tap O. Tr Several taps, including the voltage regulating switch S T From including the middle tap O Tr Choose any one of the several taps, including the one mentioned above, as the voltage regulating switch S. T Lead wire.

[0287] The flexible in-phase power supply device also includes two continuously adjustable voltage sources, CPSD1 and CPSD2, which are connected in series with the single-phase transformer T. Mr and single-phase transformer T Tr In the transformer path of the single-phase output voltage, such as Figure 16 The diagram shows one embodiment of this flexible in-phase power supply device, with a single-phase transformer T. Mr A voltage source CPSD1 is connected in series between the isolation transformer and the single-phase transformer T. Tr A voltage source CPSD2 is connected in series between the isolation transformer I and the isolation transformer II. Specifically, the first terminal of the primary winding of the isolation transformer I and the voltage regulating switch S... M A voltage source CPSD1 is connected in series between the leads, and the second end of the primary winding of isolation transformer one is connected to a single-phase transformer T. Mr The center tap O of the secondary winding Mr The first end of the secondary winding of isolation transformer one is connected to the second end of the secondary winding of isolation transformer two, and the second end of the secondary winding of isolation transformer one is connected to the single-phase transformer T. M The first end of the secondary winding is connected. The first end of the primary winding of isolation transformer two is connected to the voltage regulating switch S. T A voltage source CPSD2 is connected in series between the leads, and the second end of the primary winding of isolation transformer two is connected to a single-phase transformer T. Tr The center tap O of the secondary winding Tr The first end of the secondary winding of isolation transformer two is connected to one output terminal of the flexible in-phase power supply device, and the second end of the secondary winding of isolation transformer two is connected to the first end of the secondary winding of isolation transformer one.

[0288] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals.TT One of the output terminals is connected to the first end of the secondary winding of isolation transformer II, and the other output terminal is connected to single-phase transformer T. T The second end of the secondary winding.

[0289] Specifically, in this embodiment, the output voltage U TT The formula for calculating the voltage source series vector summation is U. TT The calculation formula is:

[0290]

[0291]

[0292] Among them, U M Indicates a single-phase transformer T M The secondary winding output voltage, U T Indicates a single-phase transformer T T The secondary winding output voltage, voltage U M and U T With a phase difference of 90°, both isolation transformers transmit power at a 1:1 ratio; for ΔU M Voltage regulating switch S M Coarse adjustment is performed, and fine adjustment is performed using voltage source CPSD1; for ΔU T Voltage regulating switch S T Coarse adjustment is performed, and fine adjustment is performed using voltage source CPSD2; k1 is the single-phase transformer T. Mr The actual turns ratio of the primary and secondary windings involved in the transformation, k2 is the single-phase transformer T Tr The actual turns ratio of the primary and secondary windings involved in the transformer is adjusted by regulating the voltage regulating switch S. M The position of the switching tap changes the actual transformer ratio k1, and the voltage regulating switch S T The position of the switching tap changes the actual transformer ratio k2, thereby coarsely adjusting ΔU. M and △U T The amplitude; △U CPSD1 and △U CPSD2 These are additional voltage components generated by two continuously adjustable voltage sources, CPSD1 and CPSD2, respectively. The ΔU is then finely adjusted by finely tuning the voltage sources CPSD1 and CPSD2. M and △U T Voltage regulating switch S M and S T And the continuously adjustable voltage sources CPSD1 and CPSD2 perform coordinated coarse and fine adjustment processes, enabling continuous adjustment of ΔU. M and △U T The amplitude and polarity of these voltage components are compared with U. M U TSeries superposition achieves the output voltage U of a flexible in-phase power supply device. TT The amplitude and phase can be continuously adjusted in any direction.

[0293] This circuit structure includes a voltage regulating transformer (including a single-phase transformer T). M and T T ) and voltage and phase regulators (including single-phase transformers T) Mr T Tr Voltage regulating switch S M and S T (Isolation transformer) and continuously adjustable voltage sources CPSD1 and CPSD2, which are coordinated and regulated by voltage regulating switch S M and S T The position of the switching taps is changed to coarsely adjust the actual turns ratio k1 and k2, while voltage sources CPSD1 and CPSD2 are used for fine-tuning to adjust the output voltage U. TT The amplitude and phase can be continuously adjusted in any direction, thereby significantly improving the adjustment accuracy, operational flexibility and system stability of the power supply device.

[0294] In some embodiments, the flexible in-phase power supply device includes a single-phase transformer T M Single-phase transformer T T and single-phase transformer T r The first voltage regulating switch assembly and the second voltage regulating switch assembly are used to input the three-phase input voltage to the flexible in-phase power supply device through phase lines L1, L2 and L3; both the first voltage regulating switch assembly and the second voltage regulating switch assembly include voltage regulating switches and / or switching switches.

[0295] Among them, single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to the phase line L3;

[0296] in,

[0297] Single-phase transformer T M The output voltage of the secondary winding is the single-phase output voltage U. S Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. M Both ends of the secondary winding; single-phase transformer T T The secondary winding of the single-phase transformer T has multiple taps. TThe output voltage of the secondary winding is a single-phase output voltage ΔU1, and the first voltage regulating switch assembly is used to connect the single-phase transformer T. T Different taps on the secondary winding control the polarity and amplitude of the single-phase output voltage ΔU1.

[0298] Single-phase transformer T r The secondary winding of the single-phase transformer T has multiple taps. r The output voltage of the secondary winding is the single-phase output voltage ΔU2, and the second voltage regulating switch assembly is used to connect the single-phase transformer T. r Different taps on the secondary winding control the polarity and amplitude of the single-phase output voltage ΔU2.

[0299] The single-phase output voltage ΔU1 and the single-phase output voltage ΔU2 are 90° out of phase;

[0300] The output voltage U of the flexible in-phase power supply device TT This includes series voltages based on the single-phase output voltages ΔU1, ΔU2, and U. S The series connection is obtained;

[0301] The first and second voltage regulating switch assemblies are used to connect different taps to adjust the amplitude and polarity of the single-phase output voltage ΔU1 and the single-phase output voltage ΔU2, thereby adjusting the output voltage U. TT The amplitude and phase.

[0302] In some embodiments, the first voltage regulating switch assembly includes a voltage regulating switch S, and the second voltage regulating switch assembly includes a voltage regulating switch S. r ;

[0303] The single-phase transformer T T The secondary winding has multiple taps, including the center tap O. S The voltage regulating switch S is used to connect the single-phase transformer T. T Any one of the multiple taps of the secondary winding, the connected tap is connected to the lead wire through the voltage regulating switch S, and the intermediate tap O S The voltage between the lead wires connected to the voltage regulating switch S is the single-phase output voltage ΔU1;

[0304] The single-phase transformer T r The secondary winding has multiple taps, including the center tap O. r The voltage regulating switch S r Used to connect the single-phase transformer T r Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. rConnect the lead wire, the intermediate tap O r and the voltage regulating switch S r The voltage between the connected leads is that of a single-phase transformer T. T The single-phase output voltage ΔU2.

[0305] Figure 17-28 This is a schematic diagram of a second type of topology for a flexible in-phase power supply device according to some embodiments of this specification.

[0306] like Figure 17 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r Voltage regulating switches S and S r .

[0307] Among them, single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0308] Single-phase transformer T M The output voltage of the secondary winding is the single-phase output voltage U of the transformer. S Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding. Single-phase transformer T T The secondary winding includes a center tap O. S The voltage regulating switch S has several taps, including the intermediate tap O. S Choose any one of the several taps, including the one for the voltage regulator switch S; single-phase transformer T r The secondary winding has several taps, including the center tap Or, and the voltage regulating switch S r Any tap, including the center tap Or, can be selected as the voltage regulating switch S. r Lead wire.

[0309] Single-phase transformer T M The second end of the secondary winding is connected to the single-phase transformer T. T The middle tap OS Connection, single-phase transformer T r The center tap O of the secondary winding r With single-phase transformer T M The first end of the secondary winding is connected.

[0310] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to a voltage regulating switch S. r One output terminal is connected to the lead wire of the voltage regulating switch S.

[0311] Specifically, in this embodiment, the output voltage U of the flexible in-phase power supply device TT The calculation formula is:

[0312]

[0313]

[0314] Wherein, △U2 is the intermediate tap Or and the voltage regulating switch S. r The voltage between the leads, i.e., the voltage of the single-phase transformer T r Secondary output voltage (k represents the single-phase transformer T) r (Actual transformer ratio), U S For single-phase transformer T M The output voltage of the secondary winding, ΔU1, is the center tap O. S The voltage between the voltage regulator switch S lead and the single-phase transformer T T The secondary output voltage, and ΔU1 and ΔU2 are 90° out of phase; the amplitude and polarity of ΔU1 are changed by adjusting the selection tap position of the voltage regulating switch S (different taps are selected to adjust the voltage value and positive / negative direction), and the voltage regulating switch S is adjusted accordingly. r Changing the position of the tap on a single-phase transformer T r The actual turns ratio k is used to adjust the amplitude and polarity of ΔU2 (the change in k originates from the voltage ratio adjustment caused by tap selection), thereby changing the output voltage U in a series superposition manner. TT The vector sum, thus achieving the sum of U TT Adjustment of amplitude (size) and phase (angular position).

[0315] By introducing a voltage and phase regulating device, including a single-phase transformer T r and voltage regulating switches S, S r This allows for flexible adjustment of the output voltage U. TT The amplitude and phase of the voltage can be controlled to improve power quality (such as stabilizing voltage fluctuations), reduce operation and maintenance costs (adapt to load changes without hardware replacement), and enhance safety (precisely control voltage to avoid overvoltage risks) in power system applications.

[0316] In some embodiments, the flexible in-phase power supply device includes a single-phase transformer T M Single-phase transformer T T and single-phase transformer T r The first voltage regulating switch assembly and the second voltage regulating switch assembly are used to input the three-phase input voltage to the flexible in-phase power supply device through phase lines L1, L2 and L3; both the first voltage regulating switch assembly and the second voltage regulating switch assembly include voltage regulating switches and / or switching switches.

[0317] Among them, single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to the phase line L3;

[0318] in,

[0319] Single-phase transformer T T The output voltage of the secondary winding is the single-phase output voltage U. S Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. T Both ends of the secondary winding; single-phase transformer T M The secondary winding of the single-phase transformer T has multiple taps. M The output voltage of the secondary winding is a single-phase output voltage ΔU1, and the first voltage regulating switch assembly is used to connect the single-phase transformer T. M Different taps on the secondary winding control the polarity and amplitude of the single-phase output voltage ΔU1.

[0320] Single-phase transformer T r The secondary winding of the single-phase transformer T has multiple taps. r The output voltage of the secondary winding is the single-phase output voltage ΔU2, and the second voltage regulating switch assembly is used to connect the single-phase transformer T. r Different taps on the secondary winding control the polarity and amplitude of the single-phase output voltage ΔU2.

[0321] The single-phase output voltage ΔU1 and the single-phase output voltage ΔU2 are 90° out of phase;

[0322] The output voltage U of the flexible in-phase power supply device TTThis includes series voltages based on the single-phase output voltages ΔU1, ΔU2, and U. S The series connection is obtained;

[0323] The first and second voltage regulating switch assemblies are used to connect different taps to adjust the amplitude and polarity of the single-phase output voltage ΔU1 and the single-phase output voltage ΔU2, thereby adjusting the output voltage U. TT The amplitude and phase.

[0324] In some embodiments, the single-phase transformer T r and the single-phase transformer T M Common iron core.

[0325] In some embodiments, the first voltage regulating switch assembly includes a voltage regulating switch S, and the second voltage regulating switch assembly includes a voltage regulating switch S. r ;

[0326] The single-phase transformer T T The secondary winding has multiple taps, including the center tap O. S The voltage regulating switch S is used to connect the single-phase transformer T. T Any one of the multiple taps of the secondary winding, the connected tap is connected to the lead wire through the voltage regulating switch S, the intermediate tap O S The voltage between the lead wires connected to the voltage regulating switch S and the single-phase transformer T is... T The single-phase output voltage ΔU1;

[0327] The single-phase transformer T r The secondary winding has multiple taps, including the center tap O. r The voltage regulating switch S r Used to connect the single-phase transformer T r Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. r Connect the lead wire, the intermediate tap O r and voltage regulating switch S r The voltage between the connected leads is that of a single-phase transformer T. T The single-phase output voltage ΔU2.

[0328] like Figure 18 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r Voltage regulating switches S and S r .

[0329] Among them, single-phase transformer TM Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0330] Single-phase transformer T M The output voltage of the secondary winding is the single-phase output voltage U of the transformer. S Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding. Single-phase transformer T T The secondary winding includes a center tap O. S The voltage regulating switch S has several taps, including the intermediate tap O. S Choose any one of the several taps, including the one for the voltage regulator switch S; single-phase transformer T r The secondary winding has several taps, including the center tap Or, and the voltage regulating switch S r Any tap, including the center tap Or, can be selected as the voltage regulating switch S. r Lead wire.

[0331] Single-phase transformer T r The center tap O of the secondary winding r With single-phase transformer T M The center tap O of the secondary winding S Connection, single-phase transformer T T The first end of the secondary winding is connected to the lead-out line of the voltage regulating switch S.

[0332] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to a voltage regulating switch S. r One lead is connected to the other output terminal, which is connected to a single-phase transformer T. T The second end of the secondary winding.

[0333] Specifically, in this embodiment, the output voltage U TT The calculation formula is:

[0334]

[0335]

[0336] Wherein, △U1 is the center tap O S The voltage between the voltage regulator switch S lead and the single-phase transformer T T The output voltages ΔU1 and ΔU2 of the secondary winding are the center tap Or and the voltage regulating switch S. r The voltage between the leads, i.e., the voltage of the single-phase transformer T r The output voltages of the secondary winding, ΔU1 and ΔU2, are 90° out of phase, while U S For single-phase transformer T T The output voltage of the secondary winding. Compare voltages ΔU1 and ΔU2 with U... S The total output voltage U of the series connection constitutes a flexible in-phase power supply device. TT The position of the tap on the voltage regulating switch S is adjusted to change the position of the single-phase transformer T. T The secondary winding is switched on, thereby adjusting the amplitude and polarity of ΔU1, and simultaneously adjusting the voltage regulating switch S. r Changing the position of the tap on a single-phase transformer T r The secondary winding connection point is used to adjust the actual turns ratio k, thereby adjusting the amplitude and polarity of ΔU2. By coordinating the adjustment of the amplitude and polarity combination of ΔU1 and ΔU2, U is continuously controlled. TT The magnitude and phase angle of the change.

[0337] By setting up voltage and phase regulating devices, including single-phase transformer T r and voltage regulating switches S, S r This allows for the coordinated adjustment of the amplitude and polarity of ΔU1 and U2, thereby continuously controlling the total output voltage U. TT The amplitude and phase angle changes improve the flexibility and stability of the power supply system in practical applications, reduce the risk of power quality problems caused by phase mismatch, and simplify operation and maintenance. No additional complex adjustment equipment is required, which reduces system cost and maintenance difficulty.

[0338] In some embodiments, the single-phase transformer T r and the single-phase transformer T T Common iron core.

[0339] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer, the isolation transformer being used to:

[0340] For the single-phase transformer T T The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU1; for the single-phase transformer T rThe output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage △U2; the single-phase output voltage △U1 and the single-phase output voltage △U2 are 90° out of phase.

[0341] like Figure 19 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r Voltage regulating switches S and S r Two isolation transformers.

[0342] Among them, single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0343] Single-phase transformer T T The secondary winding includes a center tap O. S The voltage regulating switch S has several taps, including the intermediate tap O. S Choose any one of the several taps included to serve as the lead of the voltage regulating switch S. Connect the two ends of the primary winding of the isolation transformer to the intermediate tap O. S The voltage regulating switch S lead and the secondary winding of isolation transformer one are connected in series in the output circuit, making the single-phase transformer T T The secondary voltage can be output after isolation by an isolation transformer. Specifically, as an example, the first end of the primary winding of the isolation transformer is connected to a single-phase transformer T. M The second end of the secondary winding of the isolation transformer is connected to one output terminal of the flexible in-phase power supply device.

[0344] Single-phase transformer T r The two ends of the primary winding are connected to a single-phase transformer T. M The two ends of the secondary winding, single-phase transformer T r The secondary winding has several taps, including the center tap Or, and the voltage regulating switch S r A tap can be randomly selected from several taps, including the center tap Or, to serve as the voltage regulating switch S. rLead wires. The two ends of the primary winding of the isolation transformer are respectively connected to the intermediate tap Or and the voltage regulating switch S. r The lead-out line and the secondary winding of isolation transformer two are connected in series in the output circuit, making the single-phase transformer T... r The secondary voltage can be output after isolation by the second isolation transformer. Specifically, as an example, the first end of the secondary winding of the isolation transformer is connected to the other output end of the flexible in-phase power supply device, and the second end of the secondary winding of the isolation transformer is connected to the single-phase transformer T. M The first end of the secondary winding.

[0345] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT Among them, the secondary winding of isolation transformer one and single-phase transformer T M The two terminals formed by connecting the secondary winding of the isolation transformer and the secondary winding of the second isolation transformer in series are the output terminals of the flexible in-phase power supply device. Specifically, as an example, one output terminal of the flexible in-phase power supply device is connected to the second terminal of the primary winding of the isolation transformer, and the other output terminal is connected to the first terminal of the secondary winding of the isolation transformer.

[0346] Specifically, in this embodiment, the output voltage U of the flexible in-phase power supply device TT for:

[0347]

[0348]

[0349] Wherein, △U1 is the center tap O S The voltage between the voltage regulator switch S lead and the single-phase transformer T T The output voltages ΔU1 and ΔU2 are the center tap Or and the voltage regulating switch S. r The voltage between the leads, i.e., the voltage of the single-phase transformer T r The output voltage; voltages ΔU1 and ΔU2 are 90° out of phase. Compare voltages ΔU1 and ΔU2 with voltage U... S Series connection constitutes the output voltage U TT By adjusting the position of the tap on the voltage regulating switch S, the single-phase transformer T is changed. T The secondary winding selector taps are used to adjust the amplitude and polarity of ΔU1; the voltage regulating switch S is adjusted accordingly. r The position of the switching tap is changed to alter the position of the single-phase transformer T. r The actual turns ratio k is used to adjust the amplitude and polarity of △U2; since △U1 and △U2 are 90° out of phase, after being superimposed in series, the output voltage U is achieved by adjusting the combination of their amplitudes and polarities. TT Continuous adjustment of amplitude and phase.

[0350] By using the isolation transformer output voltage regulating switches S and S r The voltage, combined with the SCOTT transformer structure (composed of a single-phase transformer T) M and T T (Construction), making the output voltage U TT The amplitude and phase can be continuously and precisely adjusted by adjusting the position of the voltage regulator switch, thereby improving power quality (such as reducing voltage fluctuations and harmonics), enhancing operational safety (reducing the risk of electric shock through electrical isolation), simplifying the operation and maintenance process (facilitating on-site adjustment and maintenance), and reducing system costs (reducing the need for additional protection components).

[0351] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer, the isolation transformer being used to:

[0352] For the single-phase transformer T T The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU1; for the single-phase transformer T r The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage △U2; the single-phase output voltage △U1 and the single-phase output voltage △U2 are 90° out of phase.

[0353] In some embodiments, the flexible in-phase power supply device further includes an isolation transformer, the isolation transformer being used to:

[0354] For the single-phase transformer T M The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage ΔU1; for the single-phase transformer T r The output voltage of the secondary winding is isolated and transformed, and then output as a single-phase output voltage △U2; the single-phase output voltage △U1 and the single-phase output voltage △U2 are 90° out of phase.

[0355] like Figure 20 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r Voltage regulating switches S and S r Two isolation transformers.

[0356] Among them, single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively. Single-phase transformer T M The center tap O of the primary winding MConnecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0357] Single-phase transformer T M The secondary winding includes a center tap O. S The voltage regulating switch S has several taps, including the intermediate tap O. S Choose any one of the several taps included to serve as the lead of the voltage regulating switch S. Connect the two ends of the primary winding of the isolation transformer to the intermediate tap O. S The voltage regulating switch S lead and the secondary winding of isolation transformer one are connected in series in the output circuit, making the single-phase transformer T M The secondary voltage can be output after isolation by an isolation transformer. Specifically, as an example, the first end of the primary winding of the isolation transformer is connected to the second end of the secondary winding of the isolation transformer, and the second end of the primary winding of the isolation transformer is connected to a single-phase transformer T. T The first end of the secondary winding, single-phase transformer T T The second end of the secondary winding is connected to one output terminal of a flexible in-phase power supply device.

[0358] Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding. Single-phase transformer T r The secondary winding has several taps, including the center tap Or, and the voltage regulating switch S r A tap can be randomly selected from several taps, including the center tap Or, to serve as the voltage regulating switch S. r Lead wires. The two ends of the primary winding of the isolation transformer are respectively connected to the intermediate tap Or and the voltage regulating switch S. r The lead-out line and the secondary winding of isolation transformer two are connected in series in the output circuit, making the single-phase transformer T... r The secondary voltage can be output after being isolated by the isolation transformer. Specifically, as an example, the first end of the secondary winding of the isolation transformer is connected to the other output end of the flexible in-phase power supply device, and the second end of the secondary winding of the isolation transformer is connected to the first end of the primary winding of the isolation transformer.

[0359] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT Among them, the secondary winding of isolation transformer II, the secondary winding of isolation transformer I, and single-phase transformer T TAfter the secondary windings are connected in series, the two ports formed are the output terminals of the flexible in-phase power supply device. Specifically, as an example, one of the output terminals of the flexible in-phase power supply device is connected to a single-phase transformer T. T The second end of the secondary winding is connected to the first end of the secondary winding of the isolation transformer.

[0360] Specifically, in this embodiment, the output voltage is:

[0361]

[0362]

[0363] Wherein, △U1 is the center tap O S The voltage between the voltage regulator switch S lead and the single-phase transformer T T The output voltage, ΔU2, is the output voltage of the center tap Or and the voltage regulating switch S. r The voltage between the leads, i.e., the voltage of the single-phase transformer T r The output voltages, ΔU1 and ΔU2, are 90° out of phase. S For single-phase transformer T M The output voltages of the secondary winding, ΔU1, ΔU2 and U S The three are connected in series to form a U. TT By adjusting the position of the on / off tap of the voltage regulating switch S, the tap selection is changed to adjust the amplitude and polarity of ΔU1. Simultaneously, by adjusting the voltage regulating switch S... r The position of the switching tap is changed to alter the position of the single-phase transformer T. r The actual transformer ratio k is used to adjust the amplitude and polarity of ΔU2. Since the phase difference between ΔU1 and ΔU2 is fixed at 90°, adjusting their amplitude and polarity is combined with U S The series synthesis achieves the output voltage U TT Continuous adjustment of amplitude and phase.

[0364] By adding voltage regulating switches S and S r And an isolation transformer, this circuit can independently adjust the amplitude and polarity of ΔU1 and ΔU2. Since the phase difference between ΔU1 and ΔU2 is fixed at 90°, combined with U S The series connection of the voltage regulators enables continuous adjustment of the output voltage amplitude and phase. This significantly improves power quality in the power system, ensuring stable and precisely controllable output voltage, reducing voltage fluctuations and harmonic interference. At the same time, the easy operation of the voltage regulator reduces maintenance complexity, eliminating the need for frequent shutdowns for adjustments. The isolation transformer also enhances electrical isolation safety, avoiding the risk of electric shock, and reduces reliance on external compensation equipment, thereby saving overall system costs.

[0365] In some embodiments, the second voltage regulating switch assembly includes a single-pole double-throw switch K.Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r ; wherein, the single-pole double-throw switch K Ms Switch K M1r and switch K M2r For switching; single-phase transformer T r The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two static connection terminals; the voltage regulating switch S Mr and the switch K M2r The first end is connected via a lead wire; switch K M2r The second lead wire and the single-pole double-throw switch K Ms Switch K is connected between the leads of the moving point connection terminal. M1r Switch K M1r The voltage across the two ends is the single-phase output voltage ΔU2;

[0366] The first voltage regulating switch assembly includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r The single-pole double-throw switch K Ts Switch K T1r and switch K T2r For switching; single-phase transformer T T The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals; voltage regulating switch S Tr Used to connect the single-phase transformer T T The voltage regulating switch S is any one of the multiple taps of the secondary winding. Tr and the switch K T2r The first end is connected via a lead wire; switch K T2r The second-end lead and single-pole double-throw switch K Ts Switch K is connected between the leads of the moving point connection terminal. T1r Switch K T1r The voltage across the two ends is the single-phase output voltage ΔU1.

[0367] like Figure 21 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r Second voltage regulating switch assembly S r (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1rand switch K M2r ) and the first voltage regulating switch assembly S.

[0368] Among them, single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0369] The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r Single-pole double-throw switch K Ts The two stationary connection terminals serve as the two input terminals of the first voltage regulating switch assembly S, and the voltage regulating switch S Tr As the selection terminal of the first voltage regulating switch assembly S, the voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r Switch K T2r The second end and single-pole double-throw switch K Ts The moving point connection terminals serve as the two output terminals of the first voltage regulating switch assembly S.

[0370] Single-phase transformer T T The two ends of the secondary winding are respectively connected to the two input terminals of the first voltage regulating switch assembly S, and the single-phase transformer T T The secondary winding includes several taps, any one of which is connected to the selection terminal of the first voltage regulating switch assembly S. The voltage between the two output terminals of the first voltage regulating switch assembly S constitutes the single-phase transformer T. T The output voltage of the secondary winding is connected in series in the output circuit. Specifically, as an example, switch K... T2r The second terminal is connected to one output terminal of a flexible in-phase power supply device, a single-pole double-throw switch K. Ts The moving point connection terminal connects to the single-phase transformer T. M The second end of the secondary winding.

[0371] Second voltage regulating switch assembly Sr Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r Single-pole double-throw switch K Ms The two stationary connection terminals serve as the second voltage regulating switch assembly S. r The two input terminals, voltage regulating switch S Mr As the second voltage regulating switch component S r Selection terminal, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1r Switch K M2r The second end and single-pole double-throw switch K Ms The moving point connection terminal serves as the second voltage regulating switch assembly S r The two output terminals.

[0372] Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding of the single-phase transformer T r The two ends of the secondary winding are respectively connected to the second voltage regulating switch assembly S. r Input terminal; Single-phase transformer T r The secondary winding includes several taps, any one of which is connected to the second voltage regulating switch assembly S. r The selection terminal, the second voltage regulating switch assembly S r The voltage between the two output terminals constitutes a single-phase transformer T. r The output voltage of the secondary winding is connected in series in the output circuit. Specifically, as an example, switch K... M2r The second terminal connects to the other output terminal of the flexible in-phase power supply device, a single-pole double-throw switch K. Ms The moving point connection terminal connects to the single-phase transformer T. M The first end of the secondary winding.

[0373] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to switch K. T2r The second terminal, and the other output terminal, are connected to switch K. M2r The second end.

[0374] Specifically, in this embodiment, the output voltage U of the flexible in-phase power supply device TT From the formula Definition, where △U1 represents a single-phase transformer T T The single-phase output voltage drawn from the secondary winding through the first voltage regulating switch assembly S has its amplitude and polarity determined by the voltage regulating switch S. Tr The tap position determines the value; △U2 represents the single-phase transformer T. r The secondary winding is connected to the second voltage regulating switch assembly S. r The amplitude and polarity of the single-phase output voltage are determined by the voltage regulating switch S. Mr The tap position determines the location; U S Indicates a single-phase transformer T M The output voltage of the secondary winding; k represents the output voltage of the single-phase transformer T. r The actual transformation ratio; and △U1 and △U2 are 90° out of phase.

[0375] Adjust the voltage regulating switch S Tr The position of the on / off tap changes the amplitude and polarity of ΔU1; simultaneously, the voltage regulating switch S is adjusted. Mr By adjusting the position of the turn-on tap, the transformation ratio k is changed, thereby altering the amplitude and polarity of ΔU2; furthermore, by coordinating the changes in amplitude and polarity of ΔU1 and ΔU2, the output voltage U is achieved. TT Continuous adjustment in amplitude and phase.

[0376] By adopting a single-phase transformer T r Second voltage regulating switch assembly S r (including single-pole double-throw switch K) Ms Voltage regulating switch S Mr Switch K M1r and K M2r ) and the first voltage regulating switch assembly S (including a single-pole double-throw switch K) Ts Voltage regulating switch S Tr Switch K T1r and K T2r The voltage and phase regulating device structure, combined with the SCOTT transformer configuration (single-phase transformer T) M and T T This flexible in-phase power supply device enables continuous adjustment of the output voltage amplitude and phase, thereby providing a stable voltage output and reducing fluctuations in power quality; it simplifies the adjustment process of the switch tap position in operation and maintenance, making it convenient for on-site operation and maintenance; it reduces the risk of failure in terms of safety by avoiding overvoltage through switch coordinated control; and it optimizes the component layout in terms of cost, reducing the need for additional adjustment equipment.

[0377] The second voltage regulating switch assembly includes a single-pole double-throw switch K. Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r Single-phase transformer T rThe two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ms Two static connection terminals; the voltage regulating switch S Mr and the switch K M2r The first end is connected via a lead wire; switch K M2r The second lead wire and the single-pole double-throw switch K Ms Switch K is connected between the leads of the moving point connection terminal. M1r Switch K M1r The voltage across the two ends is the single-phase output voltage ΔU2;

[0378] The first voltage regulating switch assembly includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r Switch K T2r Single-phase transformer T M The two ends of the secondary winding are respectively connected to a single-pole double-throw switch K. Ts Two stationary connection terminals; voltage regulating switch S Tr Used to connect the single-phase transformer T M The voltage regulating switch S is any one of the multiple taps of the secondary winding. Tr and the switch K T2r The first end is connected via a lead wire; switch K T2r The second-end lead and single-pole double-throw switch K Ts Switch K is connected between the leads of the moving point connection terminal. T1r Switch K T1r The voltage across the two ends is the single-phase output voltage ΔU1.

[0379] like Figure 22 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r Second voltage regulating switch assembly S r and the first voltage regulating switch assembly S, wherein the second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r .

[0380] Among them, single-phase transformer T M Primary winding with center tap O MSingle-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T One end of the primary winding; single-phase transformer T T The other end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0381] The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r Single-pole double-throw switch K Ts The two stationary connection terminals serve as the two input terminals of the first voltage regulating switch assembly S, and the voltage regulating switch S Tr As the selection terminal of the first voltage regulating switch assembly S, the voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r Switch K T2r The second end and single-pole double-throw switch K Ts The moving point connection terminals serve as the two output terminals of the first voltage regulating switch assembly S.

[0382] Single-phase transformer T M The two ends of the secondary winding are respectively connected to the two input terminals of the first voltage regulating switch assembly S, and the single-phase transformer T M The secondary winding includes several taps, any one of which is connected to the selection terminal of the first voltage regulating switch assembly S. The voltage between the two output terminals of the first voltage regulating switch assembly S constitutes the single-phase transformer T. M The secondary winding output voltage is connected in series in the output circuit. Specifically, as an example, a single-pole double-throw switch K... Ts Connect the moving point to the terminal block for a single-pole double-throw switch K. Ms Moving contact terminal, switch K T2r The second end is connected to a single-phase transformer T T The first end of the secondary winding, single-phase transformer T T The second end of the secondary winding is connected to one output terminal of a flexible in-phase power supply device.

[0383] Second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S MrSwitch K M1r Switch K M2r Single-pole double-throw switch K Ms The two stationary connection terminals serve as the second voltage regulating switch assembly S. r The two input terminals, voltage regulating switch S Mr As the second voltage regulating switch component S r Selection terminal, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1r Switch K M2r The second end and single-pole double-throw switch K Ms The moving point connection terminal serves as the second voltage regulating switch assembly S r The two output terminals.

[0384] Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding of the single-phase transformer T r The two ends of the secondary winding are respectively connected to the second voltage regulating switch assembly S. r Input terminal; Single-phase transformer T r The secondary winding includes several taps, any one of which is connected to the second voltage regulating switch assembly S. r The selection terminal, the second voltage regulating switch assembly S r The voltage between the two output terminals constitutes a single-phase transformer T. r The output voltage of the secondary winding is connected in series in the output circuit. Specifically, as an example, switch K... M2r The second terminal connects to the other output terminal of the flexible in-phase power supply device, a single-pole double-throw switch K. Ms Connect the moving point to the terminal block for a single-pole double-throw switch K. Ts Moving point connection terminal.

[0385] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to a single-phase transformer T. T The second end of the secondary winding and the other output end are connected to switch K. M2r The second end.

[0386] Specifically, in this embodiment, the flexible in-phase power supply device outputs voltage U TT The calculation formula is:

[0387]

[0388] in,

[0389] △U1 is a single-phase transformer T M The single-phase output voltage of the secondary winding is drawn from the first voltage regulating switch assembly S; △U2 is the single-phase transformer T. r The secondary winding is connected to the second voltage regulating switch assembly S. r The single-phase output voltage is drawn out; U S For single-phase transformer T T The output voltage of the secondary winding; and △U1 and △U2 are 90° out of phase; the voltages △U2, △U1 and U S By connecting them in series, the output voltage U of the flexible in-phase power supply device is formed. TT .

[0390] First voltage regulating switch assembly S and second voltage regulating switch assembly S r Working principle and Figure 21 Similarly, the amplitude and polarity of ΔU1 are adjusted by the first voltage regulating switch assembly S: switch K T1r Disconnect, switch K T2r When closed, the single-pole double-throw switch K Ts Select a static point to connect, and switch the voltage regulator S. Tr By selecting single-phase transformer T M When the tap position of the secondary winding changes the amplitude of ΔU1, the voltage regulating switch S... Tr Connected to single-phase transformer T M When one end of the secondary winding is open, ΔU1 is 0. This is achieved by sequentially operating the switch (closing switch K). T1r Disconnect switch K T2r Switching single-pole double-throw switch K Ts To another static point, close switch K. T2r Disconnect switch K T1r The polarity of △U1 is switched, and the amplitude is adjusted under the new polarity; similarly, the second voltage regulating switch assembly S... r Adjust the amplitude and polarity of △U2: Switch K M1r Disconnect, switch K M2r When closed, the single-pole double-throw switch K Ms Select a static point to connect, and switch the voltage regulator S. Mr By selecting single-phase transformer T r The tap position of the secondary winding changes the amplitude of ΔU2, when the voltage regulating switch S Mr Connected to single-phase transformer T r When one end of the secondary winding is ΔU2, it is 0. This is achieved by sequentially operating the switch (closing switch K). M1r Disconnect switch K M2r Switching single-pole double-throw switch K Ms To another static point, close switch K.M2r Disconnect switch K M1r The polarity of ΔU2 is switched, and the amplitude is adjusted under the new polarity; thereby adjusting the output voltage U. TT The amplitude and phase.

[0391] By employing the first voltage regulating switch assembly S and the second voltage regulating switch assembly S r The design, including a combination of single-pole double-throw switches, voltage regulating switches, and sequential operation switches, allows for independent adjustment of the amplitude and polarity of ΔU1 and ΔU2, thereby flexibly controlling the output voltage U. TT The amplitude and phase of the signal enhance the adaptability of the power supply system in scenarios such as railways, ensuring stable power quality, while simplifying operation and maintenance, and reducing switching risks and maintenance costs.

[0392] like Figure 23 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r Second voltage regulating switch assembly S r The first voltage regulating switch assembly S and the continuously adjustable voltage source CPSD, wherein the second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r .

[0393] Among them, single-phase transformer T M Primary winding with center tap O M The two ends are connected to the three-phase input power lines L1 and L2 respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0394] The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r Single-pole double-throw switch K TsThe two stationary connection terminals serve as the two input terminals of the first voltage regulating switch assembly S, and the voltage regulating switch S Tr As the selection terminal of the first voltage regulating switch assembly S, the voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r Switch K T2r The second end and single-pole double-throw switch K Ts The moving point connection terminals serve as the two output terminals of the first voltage regulating switch assembly S.

[0395] Single-phase transformer T M The two ends of the secondary winding are respectively connected to the two input terminals of the first voltage regulating switch assembly S, and the single-phase transformer T M The secondary winding includes several taps, any one of which is connected to the selection terminal of the first voltage regulating switch assembly S. The voltage between the two output terminals of the first voltage regulating switch assembly S constitutes the single-phase transformer T. M The secondary winding output voltage is connected in series in the output circuit. Specifically, as an example, a single-pole double-throw switch K... Ts Connect the moving point to the terminal block for a single-pole double-throw switch K. Ms Moving contact terminal, switch K T2r The second end is connected to a single-phase transformer T T The first end of the secondary winding, single-phase transformer T T The second end of the secondary winding is connected to one output terminal of a flexible in-phase power supply device.

[0396] Second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r Single-pole double-throw switch K Ms The two stationary connection terminals serve as the second voltage regulating switch assembly S. r The two input terminals, voltage regulating switch S Mr As the second voltage regulating switch component S r Selection terminal, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1r Switch K M2r The second end and single-pole double-throw switch K Ms The moving point connection terminal serves as the second voltage regulating switch assembly Sr The two output terminals.

[0397] Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding of the single-phase transformer T r The two ends of the secondary winding are respectively connected to the second voltage regulating switch assembly S. r Input terminal; Single-phase transformer T r The secondary winding includes several taps, any one of which is connected to the second voltage regulating switch assembly S. r The selection terminal, the second voltage regulating switch assembly S r The voltage between the two output terminals constitutes a single-phase transformer T. r The output voltage of the secondary winding is connected in series in the output circuit. Specifically, as an example, switch K... M2r The second terminal is connected to the first port of the continuously adjustable voltage source CPSD, and a single-pole double-throw switch K. Ms Connect the moving point to the terminal block for a single-pole double-throw switch K. Ts Moving point connection terminal.

[0398] The flexible in-phase power supply device also includes a continuously adjustable voltage source CPSD, which is connected in series with the single-phase output voltage U. TT On the output circuit. Specifically, as an example, the voltage source CPSD is connected in series with switch K. M2r Between the second terminal and the other output terminal of the flexible in-phase power supply device, the first port of the voltage source CPSD is connected to switch K. M2r The second end, the second port, is connected to another output end of the flexible in-phase power supply device.

[0399] As an optional embodiment, the continuously adjustable voltage source CPSD is isolated by an isolation transformer and then connected in series with the single-phase output voltage U. TT On the output circuit.

[0400] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to a single-phase transformer T. T The second end of the secondary winding is connected to the second port of the continuously adjustable voltage source CPSD.

[0401] Specifically, in this embodiment, the output voltage U of the flexible in-phase power supply device is... TT The calculation formula is: in △U1 is a single-phase transformer T M The single-phase output voltage of the secondary winding is drawn from the first voltage regulating switch assembly S; △U2 is the single-phase transformer T. rThe secondary winding is connected to the second voltage regulating switch assembly S. r The single-phase output voltage is drawn out; U S For single-phase transformer T T The output voltage of the secondary winding; and △U1 and △U2 are 90° out of phase; the voltage U S △U1, △U2 and △U CPSD By connecting them in series, the output voltage U of the flexible in-phase power supply device is formed. TT . First voltage regulating switch assembly S and second voltage regulating switch assembly S r Working principle and Figure 22 Similarly, the amplitude and polarity of ΔU1 are adjusted by the first voltage regulating switch assembly S: switch K T1r Disconnect, switch K T2r When closed, the single-pole double-throw switch K Ts Select a static point to connect, and switch the voltage regulator S. Tr By selecting single-phase transformer T M When the tap position of the secondary winding changes the amplitude of ΔU1, the voltage regulating switch S... Tr Connected to single-phase transformer T M When one end of the secondary winding is open, ΔU1 is 0. This is achieved by sequentially operating the switch (closing switch K). T1r Disconnect switch K T2r Switching single-pole double-throw switch K Ts To another static point, close switch K. T2r Disconnect switch K T1r The polarity of △U1 is switched, and the amplitude is adjusted under the new polarity; similarly, the second voltage regulating switch assembly S... r Adjust the amplitude and polarity of △U2: Switch K M1r Disconnect, switch K M2r When closed, the single-pole double-throw switch K Ms Select a static point to connect, and switch the voltage regulator S. Mr By selecting single-phase transformer T r The tap position of the secondary winding changes the amplitude of ΔU2, when the voltage regulating switch S Mr Connected to single-phase transformer T r When one end of the secondary winding is ΔU2, it is 0. This is achieved by sequentially operating the switch (closing switch K). M1r Disconnect switch K M2r Switching single-pole double-throw switch K Ms To another static point, close switch K. M2r Disconnect switch K M1r The polarity of ΔU2 is switched, and the amplitude is adjusted under the new polarity; thereby adjusting the output voltage U. TT The amplitude and phase.

[0402] The amplitude and polarity of ΔU1 are adjusted by regulating the position of the on tap of the first voltage regulating switch assembly S and by adjusting the switching operation. The second voltage regulating switch assembly S is then adjusted accordingly. r The actual transformation ratio k is adjusted by changing the position of the tap and the switching operation, thereby adjusting the amplitude and polarity of ΔU2. ΔU2 is further adjusted by continuously adjusting the voltage source CPSD. CPSD Coarse and fine adjustments are performed, wherein the first voltage regulating switch assembly S and the second voltage regulating switch assembly S r Coarse adjustment is performed, and fine adjustment is performed using the voltage source CPSD to achieve the desired output voltage U. TT Continuous adjustment of amplitude and phase.

[0403] By adopting the SCOTT transformer wiring structure (including single-phase transformer T) M and T T ), multi-tap winding voltage regulating switch assembly (such as S) r and S switch group, including K Ms S Mr K M1r K M2r and K Ts S Tr K T1r K T2r The integrated design of the continuously adjustable voltage source CPSD enables continuous and precise control of the amplitude and phase of the output voltage, thereby significantly reducing voltage fluctuations and harmonic interference in terms of power quality, simplifying switching operations and supporting automated adjustment to reduce the need for manual intervention in terms of operation and maintenance, and reducing the use of additional compensation equipment through structural optimization in terms of cost, thus improving the overall efficiency and reliability of the system.

[0404] like Figure 24 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r An isolation transformer and a second voltage regulating switch assembly S r The first voltage regulating switch assembly S and the continuously adjustable voltage source CPSD, wherein the second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r .

[0405] The first voltage regulating switch assembly S includes a single-pole double-throw switch K.Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r Single-pole double-throw switch K Ts The two stationary connection terminals serve as the two input terminals of the first voltage regulating switch assembly S, and the voltage regulating switch S Tr As the selection terminal of the first voltage regulating switch assembly S, the voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r Switch K T2r The second end and single-pole double-throw switch K Ts The moving point connection terminals serve as the two output terminals of the first voltage regulating switch assembly S.

[0406] Single-phase transformer T M The two ends of the secondary winding are respectively connected to the two input terminals of the first voltage regulating switch assembly S, and the single-phase transformer T M The secondary winding includes several taps, any one of which is connected to the selection terminal of the first voltage regulating switch assembly S. The voltage between the two output terminals of the first voltage regulating switch assembly S constitutes the single-phase transformer T. M The secondary winding output voltage is connected in series in the output circuit. Specifically, as an example, a single-pole double-throw switch K... Ts The moving point connection terminal is connected to the second terminal of isolation transformer one, and switch K... T2r The second end is connected to a single-phase transformer T T The first end of the secondary winding, single-phase transformer T T The second end of the secondary winding is connected to one output terminal of a flexible in-phase power supply device.

[0407] Second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r Single-pole double-throw switch K Ms The two stationary connection terminals serve as the second voltage regulating switch assembly S. r The two input terminals, voltage regulating switch S Mr As the second voltage regulating switch component S r Selection terminal, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end.M1r Switch K M2r The second end and single-pole double-throw switch K Ms The moving point connection terminal serves as the second voltage regulating switch assembly S r The two output terminals.

[0408] Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. T The two ends of the secondary winding of the single-phase transformer T r The two ends of the secondary winding are respectively connected to the second voltage regulating switch assembly S. r Input terminal; Single-phase transformer T r The secondary winding includes several taps, any one of which is connected to the second voltage regulating switch assembly S. r At the selection terminal, the two ends of the primary winding of isolation transformer one are connected to the second voltage regulating switch assembly S. r The two output terminals are connected in series with the output voltage U. TT On the output circuit, this makes the single-phase transformer T r The secondary voltage can be output after isolation by an isolation transformer. Specifically, as an example, the first terminal of the isolation transformer is connected to the first port of a continuously adjustable voltage source CPSD, and the second terminal of the isolation transformer is connected to a single-pole double-throw switch K. Ts Moving point connection terminal.

[0409] The flexible in-phase power supply device also includes a continuously adjustable voltage source CPSD, with the output voltage U input in series. TT On the output circuit. Specifically, as an example, a voltage source CPSD is connected in series between the first terminal of the isolation transformer and the other output terminal of the flexible in-phase power supply device. The first port of the voltage source CPSD is connected to the first terminal of the isolation transformer, and the second port is connected to the other output terminal of the flexible in-phase power supply device.

[0410] As an optional embodiment, the continuously adjustable voltage source CPSD is isolated by an isolation transformer and then connected in series with the single-phase output voltage U. TT On the output circuit.

[0411] The flexible in-phase power supply device has two output terminals, and a voltage U is formed between the two output terminals. TT One of the output terminals is connected to a single-phase transformer T. T The second end of the secondary winding is connected to the second port of the continuously adjustable voltage source CPSD.

[0412] Specifically, in this embodiment, the output voltage U of the flexible in-phase power supply device is... TT The calculation formula is: in △U1 is a single-phase transformer T M The single-phase output voltage of the secondary winding is drawn from the first voltage regulating switch assembly S; △U2 is the single-phase transformer T. r The secondary winding is connected to the second voltage regulating switch assembly S. r The single-phase output voltage is drawn out; U S For single-phase transformer T T The output voltage of the secondary winding; and △U1 and △U2 are 90° out of phase; the voltage U S △U1, △U2 and △U CPSD By connecting them in series, the output voltage U of the flexible in-phase power supply device is formed. TT .

[0413] First voltage regulating switch assembly S and second voltage regulating switch assembly S r Working principle and Figure 22 Similarly, the amplitude and polarity of ΔU1 are adjusted by the first voltage regulating switch assembly S: switch K T1r Disconnect, switch K T2r When closed, the single-pole double-throw switch K Ts Select a static point to connect, and switch the voltage regulator S. Tr By selecting single-phase transformer T M When the tap position of the secondary winding changes the amplitude of ΔU1, the voltage regulating switch S... Tr Connected to single-phase transformer T M When one end of the secondary winding is open, ΔU1 is 0. This is achieved by sequentially operating the switch (closing switch K). T1r Disconnect switch K T2r Switching single-pole double-throw switch K Ts To another static point, close switch K. T2r Disconnect switch K T1r The polarity of △U1 is switched, and the amplitude is adjusted under the new polarity; similarly, the second voltage regulating switch assembly S... r Adjust the amplitude and polarity of △U2: Switch K M1r Disconnect, switch K M2r When closed, the single-pole double-throw switch K Ms Select a static point to connect, and switch the voltage regulator S. Mr By selecting single-phase transformer T r The tap position of the secondary winding changes the amplitude of ΔU2, when the voltage regulating switch S Mr Connected to single-phase transformer T r When one end of the secondary winding is ΔU2, it is 0. This is achieved by sequentially operating the switch (closing switch K). M1r Disconnect switch K M2r Switching single-pole double-throw switch K Ms To another static point, close switch K. M2r Disconnect switch K M1rThe polarity of ΔU2 is switched, and the amplitude is adjusted under the new polarity; thereby adjusting the output voltage U. TT The amplitude and phase.

[0414] By employing a voltage regulating switch assembly structure including a single-pole double-throw switch, a voltage regulating switch, and an auxiliary switch, combined with a continuously adjustable voltage source CPSD inserted into the circuit, operators can independently adjust the amplitude and polarity of ΔU1 and ΔU2 by simply switching the switch positions, thereby achieving the desired output voltage U. TT The precise control of amplitude and phase not only significantly improves power quality in scenarios such as railway power supply (e.g., reducing voltage fluctuations), but also simplifies operation and maintenance (e.g., eliminating the need for frequent equipment replacement) and reduces maintenance costs.

[0415] like Figure 25 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r First voltage regulating switch assembly S, second voltage regulating switch assembly S r A continuously adjustable voltage source CPSD and a converter CNC, wherein the first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r Second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The converter and voltage source CPSD share a common DC bus. The AC side of the converter is connected to the three-phase voltage port on the main circuit of the flexible in-phase power supply unit via an isolation transformer.

[0416] Among them, single-phase transformer T M Primary winding with center tap O M Single-phase transformer T M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0417] The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch STr Switch K T1r and switch K T2r Single-pole double-throw switch K Ts The two stationary connection terminals serve as the two input terminals of the first voltage regulating switch assembly S, and the voltage regulating switch S Tr As the selection terminal of the first voltage regulating switch assembly S, the voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r Switch K T2r The second end and single-pole double-throw switch K Ts The moving point connection terminals serve as the two output terminals of the first voltage regulating switch assembly S.

[0418] Single-phase transformer T M The two ends of the secondary winding are respectively connected to the two input terminals of the first voltage regulating switch assembly S, and the single-phase transformer T M The secondary winding includes several taps, any one of which is connected to the selection terminal of the first voltage regulating switch assembly S. The voltage between the two output terminals of the first voltage regulating switch assembly S constitutes the single-phase transformer T. M The secondary winding output voltage is connected in series in the output circuit. Specifically, as an example, a single-pole double-throw switch K... Ts Connect the moving point to the terminal block for a single-pole double-throw switch K. Ms Moving contact terminal, switch K T2r The second end is connected to a single-phase transformer T T The first end of the secondary winding, single-phase transformer T T The second end of the secondary winding is connected to one output terminal of a flexible in-phase power supply device.

[0419] Second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r Single-pole double-throw switch K Ms The two stationary connection terminals serve as the second voltage regulating switch assembly S. r The two input terminals, voltage regulating switch S Mr As the second voltage regulating switch component S r Selection terminal, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1rSwitch K M2r The second end and single-pole double-throw switch K Ms The moving point connection terminal serves as the second voltage regulating switch assembly S r The two output terminals.

[0420] Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding of the single-phase transformer T r The two ends of the secondary winding are respectively connected to the second voltage regulating switch assembly S. r Input terminal; Single-phase transformer T r The secondary winding includes several taps, any one of which is connected to the second voltage regulating switch assembly S. r The selection terminal, the second voltage regulating switch assembly S r The voltage between the two output terminals constitutes a single-phase transformer T. r The output voltage of the secondary winding is connected in series in the output circuit. Specifically, as an example, switch K... M2r The second terminal connects to the other output terminal of the flexible in-phase power supply device, a single-pole double-throw switch K. Ms The moving point connection terminal connects to the single-phase transformer T. M The first end of the secondary winding.

[0421] Voltage source CPSD connected in series with single-phase output voltage U TT The output circuit; the voltage source CPSD is an inverter, and the flexible in-phase power supply device also includes a converter. The DC end of the converter and the DC end of the inverter share a DC bus. The AC side of the converter is connected to the three-phase voltage port on the main circuit of the flexible in-phase power supply device through the YND11 isolation transformer.

[0422] Specifically, in this embodiment,

[0423]

[0424] Wherein, △U1 is the center tap O S The voltage between the voltage regulator switch lead and the single-phase transformer T T Secondary output voltage; △U2 is the voltage between the intermediate tap Or and the voltage regulating switch lead, i.e., the voltage of the single-phase transformer T. r Secondary output voltage; Where k is the single-phase transformer T r The actual ratio of U; S For single-phase transformer T T Output voltage of the secondary winding; ΔU CPSD This refers to the continuously adjustable voltage output from the CPSD (inverter) voltage source. The voltages ΔU1, ΔU2, and U... S and △UCPSD The output voltage U of the series connection constitutes a flexible in-phase power supply device. TT .

[0425] First voltage regulating switch assembly S and second voltage regulating switch assembly S r Working principle and Figure 22 Similarly, the amplitude and polarity of ΔU1 are adjusted by the first voltage regulating switch assembly S: switch K T1r Disconnect, switch K T2r When closed, the single-pole double-throw switch K Ts Select a static point to connect, and switch the voltage regulator S. Tr By selecting single-phase transformer T M When the tap position of the secondary winding changes the amplitude of ΔU1, the voltage regulating switch S... Tr Connected to single-phase transformer T M When one end of the secondary winding is open, ΔU1 is 0. This is achieved by sequentially operating the switch (closing switch K). T1r Disconnect switch K T2r Switching single-pole double-throw switch K Ts To another static point, close switch K. T2r Disconnect switch K T1r The polarity of △U1 is switched, and the amplitude is adjusted under the new polarity; similarly, the second voltage regulating switch assembly S... r Adjust the amplitude and polarity of △U2: Switch K M1r Disconnect, switch K M2r When closed, the single-pole double-throw switch K Ms Select a static point to connect, and switch the voltage regulator S. Mr By selecting single-phase transformer T r The tap position of the secondary winding changes the amplitude of ΔU2, when the voltage regulating switch S Mr Connected to single-phase transformer T r When one end of the secondary winding is ΔU2, it is 0. This is achieved by sequentially operating the switch (closing switch K). M1r Disconnect switch K M2r Switching single-pole double-throw switch K Ms To another static point, close switch K. M2r Disconnect switch K M1r The polarity of ΔU2 is switched, and the amplitude is adjusted under the new polarity; thereby adjusting the output voltage U. TT The amplitude and phase.

[0426] By adjusting the on / off position of the voltage regulating switch S, the amplitude and polarity of ΔU1 are changed; by adjusting the voltage regulating switch S... r By adjusting the k value at the on / off position, the amplitude and polarity of ΔU2 are changed; combined with the voltage source CPSD, ΔU2 is provided. CPSD Fine-tuning to achieve U TTContinuous control of amplitude and phase, while the converter supplies power to the inverter through the DC bus, supports voltage regulation and manages negative sequence and reactive current of traction loads.

[0427] The single-phase transformer T is changed by adjusting the voltage regulating switch S. T The magnitude and polarity of the secondary output voltage ΔU1, and the effect of adjusting the voltage regulator switch S. r Change single-phase transformer T r The magnitude and polarity of the secondary output voltage ΔU2, combined with the continuously adjustable voltage ΔU provided by the voltage source CPSD, determine the voltage and polarity of the secondary output voltage ΔU2. CPSD Fine-tuning is performed to achieve the output voltage U of the flexible in-phase power supply device. TT Continuous control of amplitude and phase; at the same time, the converter supplies power to the inverter through the DC bus, supports voltage regulation and effectively manages the negative sequence and reactive current of the traction load, thereby improving power quality (such as reducing voltage fluctuations and harmonics), enhancing system stability, and simplifying operation and maintenance (coarse adjustment is achieved through switch switching, reducing maintenance complexity).

[0428] like Figure 26 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T r First voltage regulating switch assembly S, second voltage regulating switch assembly S r A continuously adjustable voltage source CPSD (inverter) and converter CNC, and a second voltage regulating switch assembly S. r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r The DC terminals of the converter and the inverter share a common DC bus. The primary side of the specially designed isolation transformer utilizes the primary sides of the M and T sections of the SCOTT transformer, while its secondary side draws two-phase AC power with a 90° phase difference from the M and T sections, respectively.

[0429] Single-phase transformer T M Primary winding with center tap O M The two ends of the primary winding are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power; single-phase transformer T Mand single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0430] The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r Single-pole double-throw switch K Ts The two stationary connection terminals serve as the two input terminals of the first voltage regulating switch assembly S, and the voltage regulating switch S Tr As the selection terminal of the first voltage regulating switch assembly S, the voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r Switch K T2r The second end and single-pole double-throw switch K Ts The moving point connection terminals serve as the two output terminals of the first voltage regulating switch assembly S.

[0431] Single-phase transformer T M The two ends of the secondary winding are respectively connected to the two input terminals of the first voltage regulating switch assembly S, and the single-phase transformer T M The secondary winding includes several taps, any one of which is connected to the selection terminal of the first voltage regulating switch assembly S. The voltage between the two output terminals of the first voltage regulating switch assembly S constitutes the single-phase transformer T. M The secondary winding output voltage is connected in series in the output circuit. Specifically, as an example, a single-pole double-throw switch K... Ts Connect the moving point to the terminal block for a single-pole double-throw switch K. Ms Moving contact terminal, switch K T2r The second end is connected to a single-phase transformer T T The first end of the secondary winding, single-phase transformer T T The second end of the secondary winding is connected to one output terminal of a flexible in-phase power supply device.

[0432] Second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r Single-pole double-throw switch K Ms The two stationary connection terminals serve as the second voltage regulating switch assembly S. r The two input terminals, voltage regulating switch S Mr As the second voltage regulating switch component S r Selection terminal, voltage regulating switch SMr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1r Switch K M2r The second end and single-pole double-throw switch K Ms The moving point connection terminal serves as the second voltage regulating switch assembly S r The two output terminals.

[0433] Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding of the single-phase transformer T r The two ends of the secondary winding are respectively connected to the second voltage regulating switch assembly S. r Input terminal; Single-phase transformer T r The secondary winding includes several taps, any one of which is connected to the second voltage regulating switch assembly S. r The selection terminal, the second voltage regulating switch assembly S r The voltage between the two output terminals constitutes a single-phase transformer T. r The output voltage of the secondary winding is connected in series in the output circuit. Specifically, as an example, switch K... M2r The second terminal connects to the other output terminal of the flexible in-phase power supply device, a single-pole double-throw switch K. Ms The moving point connection terminal connects to the single-phase transformer T. M The first end of the secondary winding.

[0434] The flexible in-phase power supply device also includes a continuously adjustable voltage source CPSD, which is connected in series with the single-phase output voltage U. TT The output circuit. The flexible in-phase power supply device also includes a converter and an inverter as a voltage source. The DC terminals of the converter and the inverter share a common DC bus. The isolation transformer on the AC side of the converter is a specially designed transformer. The primary side of the isolation transformer utilizes the primary sides of the M and T terminals of the SCOTT transformer. The secondary side of the isolation transformer draws two-phase single-phase AC power with a 90° phase difference from the M and T terminals, respectively.

[0435] Specifically, in this embodiment, the output voltage U TT The calculation formula is:

[0436]

[0437] Among them: U S For single-phase transformer T T Output voltage of the secondary winding;

[0438] △U1 is the output voltage of the first voltage regulating switch assembly S, corresponding to the single-phase transformer T. T Output voltage of the secondary winding;

[0439] △U2 is the second voltage regulating switch assembly S r Output voltage, corresponding to single-phase transformer T r The output voltage of the secondary winding, and satisfies Where k is the single-phase transformer T r The actual ratio;

[0440] △U CPSD The output voltage of the continuously adjustable voltage source CPSD (inverter);

[0441] △U1 and △U2 are 90° out of phase, and the output voltage is regulated by connecting them in series.

[0442] First voltage regulating switch assembly S and second voltage regulating switch assembly S r Working principle and Figure 22 Similarly, the amplitude and polarity of ΔU1 are adjusted by the first voltage regulating switch assembly S: switch K T1r Disconnect, switch K T2r When closed, the single-pole double-throw switch K Ts Select a static point to connect, and switch the voltage regulator S. Tr By selecting single-phase transformer T M When the tap position of the secondary winding changes the amplitude of ΔU1, the voltage regulating switch S... Tr Connected to single-phase transformer T M When one end of the secondary winding is open, ΔU1 is 0. This is achieved by sequentially operating the switch (closing switch K). T1r Disconnect switch K T2r Switching single-pole double-throw switch K Ts To another static point, close switch K. T2r Disconnect switch K T1r The polarity of △U1 is switched, and the amplitude is adjusted under the new polarity; similarly, the second voltage regulating switch assembly S... r Adjust the amplitude and polarity of △U2: Switch K M1r Disconnect, switch K M2r When closed, the single-pole double-throw switch K Ms Select a static point to connect, and switch the voltage regulator S. Mr By selecting single-phase transformer T r The tap position of the secondary winding changes the amplitude of ΔU2, when the voltage regulating switch S Mr Connected to single-phase transformer T r When one end of the secondary winding is ΔU2, it is 0. This is achieved by sequentially operating the switch (closing switch K). M1r Disconnect switch K M2rSwitching single-pole double-throw switch K Ms To another static point, close switch K. M2r Disconnect switch K M1r The polarity of ΔU2 is switched, and the amplitude is adjusted under the new polarity; thereby adjusting the output voltage U. TT The amplitude and phase.

[0443] The polarity of ΔU1 is switched by adjusting the first voltage regulating switch assembly S, and its amplitude is adjusted within different polarity ranges; the amplitude of ΔU1 is adjusted by adjusting the second voltage regulating switch assembly S. r The turns ratio k is changed to switch the polarity of ΔU2 and adjust its amplitude; fine-tuning is performed using a continuously adjustable voltage source CPSD to change ΔU. CPSD The amplitude and phase; thereby coordinating the control of each voltage component to achieve control over the output voltage U. TT Continuous adjustment of amplitude and phase.

[0444] By employing a continuously adjustable voltage source (CPSD) (inverter), a converter, and a specially designed isolation transformer, where the DC terminals of the converter and inverter share a common DC bus, and the primary side of the isolation transformer utilizes the primary sides of the M and T terminals of the SCOTT transformer, while the secondary side draws single-phase AC power with a 90° phase difference from the M and T terminals, more precise voltage adjustment can be achieved, improving power quality stability and reducing output voltage fluctuations. Simultaneously, the shared DC bus simplifies the circuit structure, reduces component costs and installation space requirements. Furthermore, utilizing the existing SCOTT transformer structure avoids the need for additional isolation equipment, enhancing ease of operation and maintenance and system security, and adapting to diverse load scenarios.

[0445] like Figure 27 As shown, a flexible in-phase power supply device also includes a bridge converter SBC, which shares a DC bus with the inverter CPSD. The AC side of the bridge converter SBC is connected to the three-phase voltage port or multiple single-phase AC voltage ports of the rail transit power distribution system after being isolated and transformed by a transformer (YND11).

[0446] The bridge converter SBC is used to draw power from the rail transit power distribution system to provide power support for the inverter as a continuous and adjustable voltage source.

[0447] The bridge converter (SBC) is also used in conjunction with inverters and / or compensation converters on a common DC bus to control the power exchange between the traction power supply system and the rail transit power distribution system.

[0448] like Figure 28 As shown, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Single-phase transformer T rSecond voltage regulating switch assembly S r The system includes a first voltage regulating switch assembly S, a continuously adjustable voltage source CPSD, and two converter CNCs. The second voltage regulating switch assembly S... r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r and switch K M2r The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r One isolation transformer shares the primary side with the M-type terminal of the SCOTT transformer, and the other isolation transformer shares the primary side with the T-type terminal of the SCOTT transformer.

[0449] Single-phase transformer T M Primary winding with center tap O M The two ends are connected to phase lines L1 and L2 of the three-phase input power, respectively, with a center tap O. M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to phase line L3 of the three-phase input power, and the single-phase transformer T... M and single-phase transformer T T The wiring structure that constitutes a SCOTT transformer.

[0450] The first voltage regulating switch assembly S includes a single-pole double-throw switch K. Ts Voltage regulating switch S Tr Switch K T1r and switch K T2r Single-pole double-throw switch K Ts The two stationary connection terminals serve as the two input terminals of the first voltage regulating switch assembly S, and the voltage regulating switch S Tr As the selection terminal of the first voltage regulating switch assembly S, the voltage regulating switch S Tr The lead wire is connected to switch K. T2r The first end, single-pole double-throw switch K Ts Moving point connection terminal and switch K T2r Switch K is connected between the second end. T1r Switch K T2r The second end and single-pole double-throw switch K Ts The moving point connection terminals serve as the two output terminals of the first voltage regulating switch assembly S.

[0451] Single-phase transformer T M The two ends of the secondary winding are respectively connected to the two input terminals of the first voltage regulating switch assembly S, and the single-phase transformer T MThe secondary winding includes several taps, any one of which is connected to the selection terminal of the first voltage regulating switch assembly S. The voltage between the two output terminals of the first voltage regulating switch assembly S constitutes the single-phase transformer T. M The secondary winding output voltage is connected in series in the output circuit. Specifically, as an example, a single-pole double-throw switch K... Ts Connect the moving point to the terminal block for a single-pole double-throw switch K. Ms Moving contact terminal, switch K T2r The second end is connected to a single-phase transformer T T The first end of the secondary winding, single-phase transformer T T The second end of the secondary winding is connected to one output terminal of a flexible in-phase power supply device.

[0452] Second voltage regulating switch assembly S r Including single-pole double-throw switch K Ms Voltage regulating switch S Mr Switch K M1r Switch K M2r Single-pole double-throw switch K Ms The two stationary connection terminals serve as the second voltage regulating switch assembly S. r The two input terminals, voltage regulating switch S Mr As the second voltage regulating switch component S r Selection terminal, voltage regulating switch S Mr The lead wire is connected to switch K. M2r The first end, single-pole double-throw switch K Ms Moving point connection terminal and switch K M2r Switch K is connected between the second end. M1r Switch K M2r The second end and single-pole double-throw switch K Ms The moving point connection terminal serves as the second voltage regulating switch assembly S r The two output terminals.

[0453] Single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. M The two ends of the secondary winding of the single-phase transformer T r The two ends of the secondary winding are respectively connected to the second voltage regulating switch assembly S. r Input terminal; Single-phase transformer T r The secondary winding includes several taps, any one of which is connected to the second voltage regulating switch assembly S. r The selection terminal, the second voltage regulating switch assembly S r The voltage between the two output terminals constitutes a single-phase transformer T. r The output voltage of the secondary winding is connected in series in the output circuit. Specifically, as an example, switch K... M2rThe second terminal connects to the other output terminal of the flexible in-phase power supply device, a single-pole double-throw switch K. Ms The moving point connection terminal connects to the single-phase transformer T. M The first end of the secondary winding.

[0454] The flexible in-phase power supply device also includes a continuously adjustable voltage source CPSD, which is connected in series with the single-phase output voltage U. TT The output circuit also includes two converters. One converter's AC side isolation transformer shares a primary winding with the M-branch of the SCOTT transformer, and its secondary winding draws single-phase AC power from the M-branch. The other converter's AC side isolation transformer shares a primary winding with the T-branch of the SCOTT transformer, and its secondary winding draws single-phase AC power from the T-branch. The DC sides of both converters and the inverter share a common DC bus; △U1, △U2, U S With respect to the voltage ΔU of CPSD CPSD The output voltage U is formed by series connection. TT .

[0455] Specifically, in this embodiment, the output voltage U TT The calculation formula is:

[0456]

[0457] Where △U2 is the single-phase transformer T r The secondary output voltage is equal to the actual turns ratio k and the single-phase transformer T. M Secondary winding output voltage U S The product of, i.e. △U1 is a single-phase transformer T T Secondary output voltage; U S For single-phase transformer T T Output voltage of the secondary winding; ΔU CPSD The output voltage of the continuously adjustable voltage source CPSD; ΔU1 and ΔU2 are 90° out of phase; single-phase transformer T r The primary winding is connected to a single-phase transformer T at both ends. T The outputs of the two ends of the secondary winding are connected to the second voltage regulating switch assembly S. r Adjustment generates ΔU2, single-phase transformer T T The output of the secondary winding is adjusted by the first voltage regulating switch assembly S to generate ΔU1, and the voltage source CPSD is connected in series with U. TT The output circuit.

[0458] First voltage regulating switch assembly S and second voltage regulating switch assembly S r Working principle and Figure 22 Similarly, the amplitude and polarity of ΔU1 are adjusted by the first voltage regulating switch assembly S: switch K T1rDisconnect, switch K T2r When closed, the single-pole double-throw switch K Ts Select a static point to connect, and switch the voltage regulator S. Tr By selecting single-phase transformer T M When the tap position of the secondary winding changes the amplitude of ΔU1, the voltage regulating switch S... Tr Connected to single-phase transformer T M When one end of the secondary winding is open, ΔU1 is 0. This is achieved by sequentially operating the switch (closing switch K). T1r Disconnect switch K T2r Switching single-pole double-throw switch K Ts To another static point, close switch K. T2r Disconnect switch K T1r The polarity of △U1 is switched, and the amplitude is adjusted under the new polarity; similarly, the second voltage regulating switch assembly S... r Adjust the amplitude and polarity of △U2: Switch K M1r Disconnect, switch K M2r When closed, the single-pole double-throw switch K Ms Select a static point to connect, and switch the voltage regulator S. Mr By selecting single-phase transformer T r The tap position of the secondary winding changes the amplitude of ΔU2, when the voltage regulating switch S Mr Connected to single-phase transformer T r When one end of the secondary winding is ΔU2, it is 0. This is achieved by sequentially operating the switch (closing switch K). M1r Disconnect switch K M2r Switching single-pole double-throw switch K Ms To another static point, close switch K. M2r Disconnect switch K M1r The polarity of ΔU2 is switched, and the amplitude is adjusted under the new polarity; thereby adjusting the output voltage U. TT The amplitude and phase.

[0459] By adjusting the second voltage regulating switch component S r By adjusting the position of the on-tap and the coordination of the switch, the actual transformation ratio k and polarity are changed, thereby adjusting the amplitude and phase of ΔU2. Simultaneously, by adjusting the position of the on-tap of the first voltage regulating switch assembly S and the coordination of the switch, the amplitude and polarity of ΔU1 are adjusted; combined with the continuous adjustment of ΔU by the voltage source CPSD... CPSD As a fine-tuning process, it works in conjunction with the output voltage U to achieve... TT The amplitude and phase of the inverter are continuously controlled; the two converters draw single-phase AC power from the M and T blocks of the SCOTT transformer respectively through the isolation transformer, and supply power to the inverter through the DC bus, thereby supporting the continuous regulation of the output of the voltage source CPSD.

[0460] By introducing a continuously adjustable voltage source CPSD in series with UTT In the circuit, and combined with the design where two converters draw power from the M and T terminals of the SCOTT transformer respectively through isolation transformers and share a DC bus, and employing a voltage regulating switch assembly structure including a single-pole double-throw switch and a voltage regulating switch, the output voltage U is made... TT The amplitude and phase can be continuously and precisely coordinated, thereby significantly improving power quality and reducing voltage fluctuations and phase deviations. At the same time, the integrated design simplifies the system architecture, reduces the number of components and manufacturing costs, and facilitates operation and maintenance adjustments, thereby improving power supply reliability and security.

[0461] Figures 29-30 This is a schematic diagram of a third type of topology for a flexible in-phase power supply device according to some embodiments of this specification.

[0462] like Figure 29 As shown, in some embodiments, a flexible in-phase power supply device includes a single-phase transformer T. M Single-phase transformer T T Voltage regulating switch S M and voltage regulating switch S T The three-phase input voltage is input to the flexible in-phase power supply device through phase lines L1, L2 and L3.

[0463] Among them, single-phase transformer T M The primary winding has a center tap O M Single-phase transformer T M The two ends of the primary winding are respectively connected to phase line L1 and phase line L2, and the intermediate tap O M Connecting single-phase transformer T T The first end of the primary winding; single-phase transformer T T The second end of the primary winding is connected to the phase line L3;

[0464] Single-phase transformer T M The secondary winding has multiple taps, and the voltage regulating switch S M Used to connect the single-phase transformer T M Any one of the multiple taps of the secondary winding, the connected tap is connected through the voltage regulating switch S. M Connect the lead wires, single-phase transformer T M The first end of the secondary winding is connected to the voltage regulating switch S M The voltage between the connected leads is that of a single-phase transformer T. M The single-phase output voltage ΔU M The connected tap is connected via the voltage regulating switch S. T Connect the lead wires, single-phase transformer T T The fi...

Claims

1. A flexible, phase- balanced power supply apparatus, characterized by, The application is applied to railway traction power supply, comprising n (n≥1) transformers, voltage regulating switches and / or switching switches; The input voltage of the flexible in-phase power supply device is a three-phase voltage or a single-phase voltage with phase difference; The n transformers are used to directly or step by step transform the input voltage into m (m≥2) single-phase output voltages; Among the m single-phase output voltages, k (2≤k≤m) single-phase output voltages are constructed by combining the voltage regulating switches and / or switching switches and the multi-tap characteristics of the transformer windings, and the voltage regulating switches and / or switching switches are arranged on the transformer voltage transformation path to adjust the voltage amplitude and / or polarity of the single-phase output voltage; The output voltage of the flexible in-phase power supply device includes a series voltage, which is obtained by series connection of at least two single-phase output voltages with phase difference; the output voltage amplitude and phase of the flexible in-phase power supply device are adjusted by adjusting the single-phase output voltage.

2. A flexible phase aligned power supply device according to claim 1, wherein, A single-phase transformer (T M ), a single-phase transformer (T T ), a single-phase transformer (T Mr ), and a single-phase transformer (T Tr ), a first voltage regulating switch assembly and a second voltage regulating switch assembly; a three-phase input voltage is input into the flexible homopolar power supply device through a phase line (L1), a phase line (L2), and a phase line (L3); the first voltage regulating switch assembly and the second voltage regulating switch assembly each include a voltage regulating switch and / or a switching switch; The single-phase transformer (T M ) primary winding has a middle tap (O M ), two ends of the single-phase transformer (T M ) primary winding are connected with the phase line (L1) and the phase line (L2) respectively, and the middle tap (O M ) is connected with a first end of the single-phase transformer (T T ) primary winding; a second end of the single-phase transformer (T T ) primary winding is connected with the phase line (L3). Single-phase transformer (T M ) and single-phase transformer (T T ) output voltage of the secondary winding is single-phase output voltage (U M ) and single-phase output voltage (U T ), single-phase output voltage (U M ) and single-phase output voltage (U T ) phase difference of 90 degrees; The primary winding of the single-phase transformer (T Mr ) is connected to two ends of the secondary winding of the single-phase transformer (T M ); the secondary winding of the single-phase transformer (T Mr ) has multiple taps; the output voltage of the secondary winding of the single-phase transformer (T Mr ) is a single-phase output voltage (△U M ); the first voltage regulating switch assembly is used to connect different taps of the secondary winding of the single-phase transformer (T Mr ) to control the polarity and amplitude of the single-phase output voltage (△U M ). The primary winding of the single-phase transformer (T Tr ) is connected to two ends of the secondary winding of the single-phase transformer (T T ); the secondary winding of the single-phase transformer (T Tr ) has multiple taps, the output voltage of the secondary winding of the single-phase transformer (T Tr ) is a single-phase output voltage (△U T ), and the second voltage regulating switch assembly is used to connect different taps of the secondary winding of the single-phase transformer (T Tr ) to control the polarity and amplitude of the single-phase output voltage (△U T ). The single-phase output voltage (△U M ) and the single-phase output voltage (△U T ) are 90° out of phase. The output voltage (U TT ) of the flexible phase-locked power supply device comprises a series voltage, which is based on the single-phase output voltage (△U M ), the single-phase output voltage (△U T ), the single-phase output voltage (U M ) and / or the single-phase output voltage (U T ) in series. The first and second voltage regulating switch assemblies are used to connect different taps to regulate the magnitude and polarity of the single-phase output voltage (△U M ) and the single-phase output voltage (△U T ), thereby regulating the magnitude and phase of the output voltage (U TT ).

3. The flexible in-phase power supply device according to claim 2, wherein The single-phase transformer (T M ) and the single-phase transformer (T Mr ) share a common core; and / or The single-phase transformer (T T ) and the single-phase transformer (T Tr ) share a common core.

4. A flexible phase aligned power supply device according to claim 2, wherein, Further comprising an isolation transformer, which is used to The output voltage of the secondary winding of the single-phase transformer (T Mr ) is isolated and then output as a single-phase output voltage (ΔU M ). and / or The output voltage of the secondary winding of the single-phase transformer (T Tr ) is isolated and then output as a single-phase output voltage (ΔU T ). The single-phase output voltage (△U M ) and the single-phase output voltage (△U T ) are 90° out of phase.

5. A flexible phase aligned power supply device according to claim 2, wherein, The first voltage regulating switch assembly includes a voltage regulating switch (S M ), and the second voltage regulating switch assembly includes a voltage regulating switch (S T ). The multiple taps of the secondary winding of the single-phase transformer (T Mr ) include a middle tap (O Mr ), the voltage regulating switch (S M ) is used to connect any one of the multiple taps of the secondary winding of the single-phase transformer (T Mr ), the connected tap is connected to the outgoing line through the voltage regulating switch (S M ), and the voltage between the middle tap (O Mr ) and the outgoing line connected with the voltage regulating switch (S M ) is the single-phase output voltage (△U M ). The multiple taps of the secondary winding of the single-phase transformer (T Tr ) include a middle tap (O Tr ), the voltage regulating switch (S T ) is used to connect any one of the multiple taps of the secondary winding of the single-phase transformer (T Tr ), the connected tap is connected to the outgoing line through the voltage regulating switch (S T ), the voltage between the middle tap (O Tr ) and the outgoing line connected by the voltage regulating switch (S T ) is the single-phase output voltage (△U T ).

6. A flexible phase aligned power supply device according to claim 2, wherein, The first voltage regulating switch assembly comprises a single-pole double-throw switch (K Ms ), a voltage regulating switch (S Mr ), a switch (K M1r ), and a switch (K M2r ), wherein the single-pole double-throw switch (K Ms ), the switch (K M1r ), and the switch (K M2r ) are switching switches; two terminals of a secondary winding of a single-phase transformer (T Mr ) are respectively connected to two static point connection terminals of the single-pole double-throw switch (K Ms ); the voltage regulating switch (S Mr ) is used to connect any one of multiple taps of the secondary winding of the single-phase transformer (T Mr ); the voltage regulating switch (S Mr ) and a first end of the switch (K M2r ) are connected through a lead-out wire; a switch (K M2r ) is connected between a lead-out wire of a second end of the switch (K Ms ) and a lead-out wire of a moving point connection terminal of the single-pole double-throw switch (K M1r ), and a voltage across the switch (K M1r ) is the single-phase output voltage (△U M ). The second voltage regulating switch assembly comprises a single-pole double-throw switch (K Ts ), a voltage regulating switch (S Tr ), a switch (K T1r ), a switch (K T2r ), wherein the single-pole double-throw switch (K Ts ), the switch (K T1r ), and the switch (K T2r ) are switching switches; two ends of a secondary winding of a single-phase transformer (T Tr ) are respectively connected to two static point connection terminals of the single-pole double-throw switch (K Ts ); the voltage regulating switch (S Tr ) is used to connect any one of a plurality of taps of the secondary winding of the single-phase transformer (T Tr ); the voltage regulating switch (S Tr ) and a first end of the switch (K T2r ) are connected through a lead-out wire; a switch (K T2r ) is connected between a lead-out wire of a second end of the switch (K Ts ) and a moving point connection terminal lead-out wire of the single-pole double-throw switch (K T1r ), and a voltage across two ends of the switch (K T1r ) is the single-phase output voltage (△U T ).

7. A flexible phase aligned power supply device as claimed in claim 1, characterized in that The single-phase transformer (T M ), the single-phase transformer (T T ), and the single-phase transformer (T r ), a first voltage regulating switch assembly and a second voltage regulating switch assembly, a three-phase input voltage is input into the flexible homopolar power supply device through a phase line (L1), a phase line (L2), and a phase line (L3); the first voltage regulating switch assembly and the second voltage regulating switch assembly each include a voltage regulating switch and / or a switching switch; The single-phase transformer (T M ) has a primary winding with a middle tap (O M ). The two ends of the primary winding of the single-phase transformer (T M ) are connected to the phase line (L1) and the phase line (L2) respectively, and the middle tap (O M ) is connected to the first end of the primary winding of the single-phase transformer (T T ). The second end of the primary winding of the single-phase transformer (T T ) is connected to the phase line (L3). Among them, Single-phase transformer (T) M The output voltage of the secondary winding is the single-phase output voltage (U). S Single-phase transformer (T) r The primary winding of the transformer is connected to a single-phase transformer (T). M The two ends of the secondary winding; a single-phase transformer (T T The secondary winding of the single-phase transformer (T) has multiple taps. T The output voltage of the secondary winding of the transformer is a single-phase output voltage (ΔU1), and the first voltage regulating switch assembly is used to connect the single-phase transformer (T). T Different taps on the secondary winding of the single-phase output voltage (ΔU1) control the polarity and amplitude of the single-phase output voltage. The secondary winding of a single-phase transformer (T r ) has multiple taps, the output voltage of the secondary winding of the single-phase transformer (T r ) is a single-phase output voltage (△U2), and the second voltage regulating switch assembly is used to connect different taps of the secondary winding of the single-phase transformer (T r ) to control the polarity and amplitude of the single-phase output voltage (△U2). The phase difference between the single-phase output voltage (△U1) and the single-phase output voltage (△U2) is 90°; The output voltage (U TT ) of the flexible in-phase power supply device comprises a series voltage, which is based on the series of the single-phase output voltage (△U1), the single-phase output voltage (△U2) and the single-phase output voltage (U S ). The first voltage regulating switch assembly and the second voltage regulating switch assembly are used to connect different taps to adjust the amplitude and polarity of the single-phase output voltage (△U1) and the single-phase output voltage (△U2), so as to adjust the amplitude and phase of the output voltage (U TT ) Or Single-phase transformer (T) T The output voltage of the secondary winding is the single-phase output voltage (U). S Single-phase transformer (T) r The primary winding of the transformer is connected to a single-phase transformer (T). T The two ends of the secondary winding; a single-phase transformer (T M The secondary winding of the single-phase transformer (T) has multiple taps. M The output voltage of the secondary winding of the transformer is a single-phase output voltage (ΔU1), and the first voltage regulating switch assembly is used to connect the single-phase transformer (T). M Different taps on the secondary winding of the single-phase output voltage (ΔU1) control the polarity and amplitude of the single-phase output voltage. The secondary winding of the single-phase transformer (T r ) has multiple taps, the output voltage of the secondary winding of the single-phase transformer (T r ) is a single-phase output voltage (△U2), and the second voltage regulating switch assembly is used to connect different taps of the secondary winding of the single-phase transformer (T r ) to control the polarity and amplitude of the single-phase output voltage (△U2). The phase difference between the single-phase output voltage (△U1) and the single-phase output voltage (△U2) is 90°; The output voltage (U TT ) of the flexible in-phase power supply device comprises a series voltage, which is based on the series of the single-phase output voltage (△U1), the single-phase output voltage (△U2) and the single-phase output voltage (U S ). The first and second voltage regulating switch assemblies are used to connect different taps to adjust the amplitude and polarity of the single phase output voltages (ΔU1) and (ΔU2), thereby adjusting the amplitude and phase of the output voltage (U TT ).

8. A flexible phase aligned power supply device according to claim 7, wherein, The single-phase transformer (T r ) and the single-phase transformer (T M ) share a common core.

9. A flexible phase aligned power supply device according to claim 7, wherein, The single-phase transformer (T r ) and the single-phase transformer (T T ) share a common core.

10. A flexible phase aligned power supply device according to claim 7, wherein, Further comprising an isolation transformer, which is used to The output voltage of the secondary winding of the single-phase transformer (T T ) is isolated and then output as a single-phase output voltage (△U1); the output voltage of the secondary winding of the single-phase transformer (T r ) is isolated and then output as a single-phase output voltage (△U2); the single-phase output voltage (△U1) and the single-phase output voltage (△U2) are 90° out of phase.

11. A flexible phase aligned power supply device according to claim 7, wherein, Further comprising an isolation transformer, which is used to The output voltage of the secondary winding of the single-phase transformer (T M ) is isolated and then output as a single-phase output voltage (△U1); the output voltage of the secondary winding of the single-phase transformer (T r ) is isolated and then output as a single-phase output voltage (△U2); the single-phase output voltage (△U1) and the single-phase output voltage (△U2) are 90° out of phase.

12. A flexible phase aligned power supply device according to claim 7, wherein, The first voltage regulating switch assembly comprises a voltage regulating switch (S), and the second voltage regulating switch assembly comprises a voltage regulating switch (S r ). The multiple taps of the secondary winding of the single-phase transformer (T T ) include an intermediate tap (O S ), the voltage regulating switch (S) is used to connect any one of the multiple taps of the secondary winding of the single-phase transformer (T T ), the connected tap is connected to the outgoing line through the voltage regulating switch (S), and the voltage between the intermediate tap (O S ) and the outgoing line connected by the voltage regulating switch (S) is the single-phase output voltage (△U1). The multiple taps of the secondary winding of the single-phase transformer (T r ) include an intermediate tap (O r ), the voltage regulating switch (S r ) is used to connect any one of the multiple taps of the secondary winding of the single-phase transformer (T r ), the connected tap is connected to the outgoing line through the voltage regulating switch (S r ), the voltage between the intermediate tap (O r ) and the outgoing line connected by the voltage regulating switch (S r ) is the single-phase output voltage (△U2) of the single-phase transformer (T T ).

13. The flexible phase aligned power supply of claim 7, wherein, The first voltage regulating switch assembly comprises a voltage regulating switch (S), and the second voltage regulating switch assembly comprises a voltage regulating switch (S r ). The single-phase transformer (T T ) has a plurality of taps of the secondary winding, including an intermediate tap (O S ). The voltage regulator switch (S) is used to connect any one of the plurality of taps of the secondary winding of the single-phase transformer (T T ). The connected tap is connected to the outgoing line through the voltage regulator switch (S). The voltage between the intermediate tap (O S ) and the outgoing line connected by the voltage regulator switch (S) is the single-phase output voltage (△U1) of the single-phase transformer (T T ). The multiple taps of the secondary winding of the single-phase transformer (T r ) include an intermediate tap (O r ), the voltage regulating switch (S r ) is used to connect any one of the multiple taps of the secondary winding of the single-phase transformer (T r ), the connected tap is connected to the outgoing line through the voltage regulating switch (S r ), the voltage between the intermediate tap (O r ) and the outgoing line connected by the voltage regulating switch (S r ) is the single-phase output voltage (△U2) of the single-phase transformer (T T ).

14. The flexible in-phase power supply device according to claim 7, wherein The second voltage regulating switch assembly comprises a single-pole double-throw switch (K Ms ), a voltage regulating switch (S Mr ), a switch (K M1r ) and a switch (K M2r ); wherein the single-pole double-throw switch (K Ms ), the switch (K M1r ) and the switch (K M2r ) are switching switches; two terminals of a secondary winding of a single-phase transformer (T r ) are respectively connected to two static point connection terminals of the single-pole double-throw switch (K Ms ); a first end of the voltage regulating switch (S Mr ) and the switch (K M2r ) is connected through a lead-out wire; a switch (K M2r ) is connected between a second end lead-out wire of the switch (K Ms ) and a lead-out wire of a moving point connection terminal of the single-pole double-throw switch (K M1r ), and a voltage across the switch (K M1r ) is the single-phase output voltage (△U2). The first voltage regulating switch assembly comprises a single-pole double-throw switch (K Ts ), a voltage regulating switch (S Tr ), a switch (K T1r ), a switch (K T2r ), wherein the single-pole double-throw switch (K Ts ), the switch (K T1r ) and the switch (K T2r ) are switching switches; two ends of a secondary winding of a single-phase transformer (T T ) are respectively connected to two static point connection terminals of the single-pole double-throw switch (K Ts ); the voltage regulating switch (S Tr ) is used to connect any one of a plurality of taps of the secondary winding of the single-phase transformer (T T ), the voltage regulating switch (S Tr ) and a first end of the switch (K T2r ) are connected through a lead-out wire; a switch (K T2r ) is connected between a lead-out wire of a second end of the switch (K Ts ) and a moving point connection terminal lead-out wire of the single-pole double-throw switch (K T1r ), and a voltage across two ends of the switch (K T1r ) is the single-phase output voltage (△U1).

15. The flexible in-phase power supply device according to claim 7, wherein The second voltage regulating switch assembly comprises a single-pole double-throw switch (K Ms ), a voltage regulating switch (S Mr ), a switch (K M1r ) and a switch (K M2r ); two terminals of a secondary winding of a single-phase transformer (T r ) are respectively connected to two static point connection terminals of the single-pole double-throw switch (K Ms ); a first end of the voltage regulating switch (S Mr ) and the switch (K M2r ) are connected through a lead-out wire; a switch (K M2r ) is connected between a second end lead-out wire of the switch (K Ms ) and a lead-out wire of a moving point connection terminal of the single-pole double-throw switch (K M1r ), and a voltage across the switch (K M1r ) is the single-phase output voltage (△U2). The first voltage regulating switch assembly includes a single-pole double-throw switch (K... Ts ), voltage regulating switch (S) Tr ), switch (K) T1r ), switch (K) T2r Single-phase transformer (T) M The two ends of the secondary winding are respectively connected to a single-pole double-throw switch (K). Ts Two stationary connection terminals; voltage regulating switch (S) Tr ) used to connect the single-phase transformer (T) M The voltage regulating switch (S) is any one of the multiple taps of the secondary winding of the voltage regulating switch. Tr ) and the switch (K) T2r The first end of the switch (K) is connected via a lead wire; T2r The second terminal lead and single-pole double-throw switch (K) Ts The switch (K) is connected between the leads of the moving point connection terminal. T1r ), switch (K) T1r The voltage across the terminals is the single-phase output voltage (ΔU1).

16. The flexible, phase-aligned power supply of claim 1, wherein, a single-phase transformer (T M ), a single-phase transformer (T T ), a voltage regulating switch (S M ) and a voltage regulating switch (S T ); a three-phase input voltage is input to the flexible homopolar power supply device through a phase line (L1), a phase line (L2) and a phase line (L3); The single-phase transformer (T M ) has a primary winding with a middle tap (O M ), two ends of the primary winding of the single-phase transformer (T M ) are connected to the phase line (L1) and the phase line (L2) respectively, and the middle tap (O M ) is connected to a first end of the primary winding of the single-phase transformer (T T ); a second end of the primary winding of the single-phase transformer (T T ) is connected to the phase line (L3). Single-phase transformer (T) M The secondary winding of the voltage regulator switch (S) has multiple taps. M ) used to connect the single-phase transformer (T) M The secondary winding of the circuit can be connected to any one of the multiple taps, and the connected tap is connected through the voltage regulating switch (S). M Connect the lead wires to the single-phase transformer (T). M The first end of the secondary winding of the voltage regulator (S) is connected to the voltage regulating switch (S) M The voltage between the leads connected to the transformer is that of a single-phase transformer (T). M The single-phase output voltage (ΔU) M The connected tap passes through the voltage regulating switch (S). T Connect the lead wires to the single-phase transformer (T). T The first end of the secondary winding of the voltage regulator (S) is connected to the voltage regulating switch (S) T The voltage between the leads connected to the transformer is that of a single-phase transformer (T). T The single-phase output voltage (ΔU) T ); The first end of the secondary winding of the single-phase transformer (T T ) is connected to the voltage regulating switch (S M ). The single-phase output voltage (△U M ) and the single-phase output voltage (△U T ) are 90° out of phase. The output voltage (U TT ) of the flexible phase- balanced power supply device comprises a series voltage, which is based on the single-phase output voltage (U M ) and the single-phase output voltage (U T ) in series.

17. A flexible phase aligned power supply device according to claim 16, wherein, The multiple taps of the secondary winding of the single-phase transformer (T T ) are located at the second end of the secondary winding of the single-phase transformer (T T ). The multiple taps of the secondary winding of the single-phase transformer (T M ) are located at the second end of the secondary winding of the single-phase transformer (T M ).

18. A flexible phase aligned power supply device according to claim 16, wherein, Also included are an isolation transformer (T MS ) and an isolation transformer (T TS ) to: The primary winding of the isolation transformer (T M ) is connected across the secondary winding of the single-phase transformer (T MS ), and the isolation transformer (T MS ) is used to isolate the output voltage of the secondary winding of the single-phase transformer (T M ) and then output it as a single-phase output voltage (△U M ). A single-phase transformer (T T ) is connected to the primary side of the isolation transformer (T TS ) at both ends of the secondary winding, and the isolation transformer (T TS ) is used to isolate the output voltage of the secondary winding of the single-phase transformer (T T ) and then output it as a single-phase output voltage (△U T ); The single-phase output voltage (△U M ) and the single-phase output voltage (△U T ) are 90° out of phase.

19. The flexible, phase-aligned power supply of claim 1, wherein, including a three-phase transformer (TPT), a voltage regulating transformer (T r ) and a voltage regulating switch (S a ), a voltage regulating switch (S b ), a voltage regulating switch (S c ); a three-phase input voltage is input to the flexible homopolar power supply device through a phase line (L1), a phase line (L2) and a phase line (L3); The primary winding of the three-phase transformer (TPT) is connected with phase line (L1), phase line (L2) and phase line (L3), and the secondary winding of the three-phase transformer (TPT) outputs three-phase voltage; the primary winding of the voltage regulating transformer (T r ) is connected with the output end of the three-phase voltage outputted by the three-phase transformer (TPT), and the three windings of the secondary winding of the voltage regulating transformer (T r ) are all multi-tap windings, one end of each of the three windings is led out as a fixed connection line, the voltage regulating switch (S a ), voltage regulating switch (S b ), voltage regulating switch (S c ) are respectively used to connect any tap in each of the three windings, and the connected tap is connected with the voltage regulating connection line of each of the three windings through voltage regulating switch (S a ), voltage regulating switch (S b ), voltage regulating switch (S c ) respectively, and the voltage between the fixed connection line and the voltage regulating connection line is the voltage regulating output voltage of the corresponding winding of the three windings. The output voltage of the flexible in-phase power supply device includes a series voltage, which is obtained by series connection of three voltage regulating output voltages output by the three windings and one or more voltages output by the secondary winding of the three-phase transformer (TPT).

20. A flexible phase aligned power supply device according to claim 19, wherein, The voltage regulating transformer (T r ) is a three-phase transformer; Or The voltage regulating transformer (T r ) consists of three single-phase transformers.

21. A flexible phase aligned power supply device according to claim 19, wherein, The voltage regulating transformer (T r ) is co-ferried with the three-phase transformer (TPT).

22. A flexible phase aligned power supply device according to claim 19, wherein, Further comprising an isolation transformer, which is used to The voltage regulating transformer (T r ) isolates the output voltage of the secondary side and outputs three voltage regulating output voltages.

23. A flexible phase aligned power supply apparatus as claimed in any one of claims 1 to 22, wherein, The flexible in-phase power supply device further comprises an output voltage continuous and adjustable voltage source, the output voltage of the output voltage continuous and adjustable voltage source is cooperatively adjusted with the single-phase output voltage, so as to continuously adjust the output voltage amplitude and phase of the flexible in-phase power supply device; Among them, The voltage output by the output voltage continuous and adjustable voltage source is connected in series with the series voltage; and / or All or part of the single-phase output voltage transformation paths are connected in series with the output voltage continuous and adjustable voltage source.

24. The flexible, single-phase power supply of claim 23, wherein, The flexible in-phase power supply device further comprises a compensation inverter, the output voltage continuous and adjustable voltage source is an inverter, and the compensation inverter and the inverter share a DC bus; The AC side of the compensation inverter is directly connected or connected through an isolation transformer to the three-phase voltage port on the main circuit of the flexible in-phase power supply device; Or The AC side of the compensation inverter is directly connected or connected through an isolation transformer to the multiple single-phase AC voltage ports on the main circuit of the flexible in-phase power supply device; The voltages of the plurality of single-phase AC voltage ports have at least two different voltage phases; The compensation converter is configured to take power from the main circuit, to regulate the reactive power and negative sequence of the traction load, and / or to provide power support for the inverter to output a continuous and adjustable voltage source output voltage.

25. The flexible and equal-phase power supply device according to claim 24, wherein The flexible and equal-phase power supply device further comprises a bridge converter, the bridge converter and the inverter share a common DC bus, and the AC side of the bridge converter is connected to a three-phase voltage port or a plurality of single-phase voltage ports of the rail transit power supply system; Alternatively, The AC side of the bridge converter is connected to a three-phase voltage port or a plurality of single-phase voltage ports of the rail transit power supply system through a transformer after isolation and transformation; The bridge converter is configured to take power from the rail transit power supply system, and to provide power support for the inverter to output a continuous and adjustable voltage source output voltage; The bridge converter is further configured to cooperate with the inverter and / or the compensation converter sharing the common DC bus to control the exchange of power between the traction power supply system and the rail transit power supply system.

26. A flexible phase aligned power supply apparatus, comprising: The phase-modulating transformer and the voltage-modulating transformer are included; The phase-modulating transformer includes a plurality of transformers, and a voltage-modulating switch and / or a switching switch are used to adjust the phase of the output voltage; The voltage-modulating transformer includes a plurality of transformers, and a voltage-modulating switch and / or a switching switch are used to adjust the amplitude of the output voltage, and part or all of the output windings of the voltage-modulating transformer are multi-tap windings; The input voltage of the flexible and equal-phase power supply device is a three-phase voltage or a plurality of single-phase voltages with different phases; The phase-modulating transformer is configured to adjust the phase of the input voltage to output a phase-modulated voltage, the voltage-modulating transformer is configured to adjust the amplitude of the phase-modulated voltage to output an amplitude-modulated voltage, and the output voltage of the flexible and equal-phase power supply device includes one single-phase voltage or a series connection of a plurality of single-phase voltages in the amplitude-modulated voltage; Alternatively, The voltage-modulating transformer is configured to adjust the amplitude of the input voltage to output an amplitude-modulated voltage, the phase-modulating transformer is configured to adjust the phase of the amplitude-modulated voltage to output a phase-modulated voltage, and the output voltage of the flexible and equal-phase power supply device includes one single-phase voltage or a series connection of a plurality of single-phase voltages in the phase-modulated voltage; The phase-modulating transformer and the voltage-modulating transformer cooperate to adjust the amplitude and phase of the output voltage of the flexible and equal-phase power supply device. The phase-modulating transformer is a two-phase phase-modulating transformer, and the voltage-modulating transformer is a two-phase voltage-modulating transformer; a three-phase input voltage is input to the flexible and equal-phase power supply device through phase line (L1), phase line (L2), and phase line (L3); 27. A flexible phase aligned power supply device according to claim 26, wherein, The output voltage of the two-phase phase-modulating transformer includes a single-phase voltage (U1) between the common terminal (P0) and the phase-modulated voltage output terminal (P1), and a single-phase voltage (U2) between the common terminal (P0) and the phase-modulated voltage output terminal (P2), and the output voltage of the two-phase phase-modulating transformer is a phase-modulated voltage; the voltage-modulating switch assembly is configured to adjust the phase of the phase-modulated voltage by connecting different taps; The two-phase voltage regulating transformer comprises a single-phase transformer (T M ), a single-phase transformer (T T ) and two voltage regulating switches, the primary winding of the single-phase transformer (T M ) has a middle tap (O M ), the two ends of the primary winding of the single-phase transformer (T M ) are connected with the phase line (L1) and the phase line (L2) respectively, and the middle tap (O M ) is connected with the first end of the primary winding of the single-phase transformer (T T ); the second end of the primary winding of the single-phase transformer (T T ) is connected with the phase line (L3). The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) each include a plurality of taps, and the two voltage regulating switches are respectively used to connect the secondary winding of the single-phase transformer (T M ) or any one of the plurality of taps of the secondary winding of the single-phase transformer (T T ), the connected tap is connected to an outgoing line through the voltage regulating switch, and the voltage between the outgoing line connected by the voltage regulating switch and the outgoing line at one end of the corresponding secondary winding of the single-phase transformer (T M ) or the single-phase transformer (T T ) is the output voltage of the secondary winding of the single-phase transformer (T M ) or the single-phase transformer (T T ). The phase difference between the secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) is 90°. The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) are connected in series, and the series connection point is connected to the common terminal (P0). The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) are connected to the other two terminals of the common terminal, which are the two-phase electric output phase line terminals. The output voltage of the two-phase voltage regulating transformer includes the output voltages of the single-phase transformer (T M ) and the single-phase transformer (T T ). The output voltage of the two-phase voltage regulating transformer is an amplitude modulation voltage. The voltage regulating switch is used to adjust the amplitude of the amplitude modulation voltage by connecting different taps. The two-phase phase-shifting transformer comprises a series transformer (T S1 ), a series transformer (T S2 ), a combination transformer (T E1 ), a combination transformer (T E2 ) and a voltage regulating switch assembly. series transformer (T S1 ), the primary winding of series transformer (T S2 ) has a middle tap, the amplitude modulation voltage is the input voltage of the two-phase phase-shifting transformer, the phase line of the amplitude modulation voltage is connected with the first end of the primary winding of the two series transformers respectively, and the second end of the primary winding of the two series transformers is respectively used as a phase modulation voltage output end (P1) and a phase modulation voltage output end (P2); the first end of the primary winding of the combination transformer (T E1 ) and the combination transformer (T E2 ) is connected with the middle tap of the primary winding of the series transformer (T S2 ) and the series transformer (T S1 ) respectively; and the second end of the primary winding of the combination transformer (T E1 ) and the combination transformer (T E2 ) is connected with a common end (P0). The input voltage of the primary winding of the combination transformer (T E1 ) includes the output voltage of the secondary winding of the single-phase transformer (T M ) and half of the primary winding voltage of the series transformer (T S2 ). The input voltage of the primary winding of the combination transformer (T E2 ) includes the output voltage of the secondary winding of the single-phase transformer (T T ) and half of the primary winding voltage of the series transformer (T S1 ). The combination transformer (T E1 ) and the secondary winding of the combination transformer (T E2 ) each have a plurality of taps, and a voltage regulating switch assembly is used to connect any one of the plurality of taps of the secondary winding of the combination transformer to control the output voltage of the combination transformer. The output voltages of the combined transformers (T E1 ) and (T E2 ) are the input voltages of the series transformer (T S1 ) and the secondary winding of the series transformer (T S2 ), respectively. ​ The output voltage of the flexible in-phase power supply device comprises a single-phase voltage (U1) and / or a single-phase voltage (U2).

28. A flexible phase aligned power supply device according to claim 27, wherein, The voltage regulating switch assembly comprises a voltage regulating switch (S E1 ), a voltage regulating switch (S E2 ), a plurality of taps of the secondary winding of the combined transformer (T E1 ) including an intermediate tap, the connected tap being connected to a lead-out wire through the voltage regulating switch (S E1 ), the voltage between the intermediate tap of the secondary winding of the combined transformer and the lead-out wire connected by the voltage regulating switch (S E1 ) being the output voltage of the combined transformer S E1 , a plurality of taps of the secondary winding of the combined transformer (T E2 ) including an intermediate tap, the connected tap being connected to a lead-out wire through the voltage regulating switch (S E2 ), the voltage between the intermediate tap of the secondary winding of the combined transformer and the lead-out wire connected by the voltage regulating switch (S E2 ) being the output voltage of the combined transformer S E2 .

29. A flexible phase aligned power supply device according to claim 27, wherein, The voltage regulating switch assembly comprises a single-pole double-throw switch (K S ), a voltage regulating switch (S r ), a switch (K1), and a switch (K2); wherein the single-pole double-throw switch (K S ), the switch (K1), and the switch (K2) are switching switches. The combination transformer (T E1 ) has the same structure as the combination transformer (T E2 ); two terminals of the secondary winding of the combination transformer are respectively connected to two static point connection terminals of the single-pole double-throw switch (K S ); the first end of the voltage regulating switch (S r ) and the switch (K1) are connected through a lead-out wire; a switch (K2) is connected between the second end lead-out wire of the switch (K1) and the lead-out wire of the dynamic point connection terminal of the single-pole double-throw switch (K S ), and the voltage across the two ends of the switch (K2) is the output voltage of the combination transformer.

30. A flexible phase aligned power supply device according to claim 26, wherein, The phase-shifting transformer is a two-phase phase-shifting transformer, and the voltage-regulating transformer is a two-phase voltage-regulating transformer; a three-phase input voltage is input into the flexible in-phase power supply device through phase lines (L1), (L2) and (L3); Among them, two-phase voltage regulating transformers include single-phase transformers (T M ) and single-phase transformer (T T ) and two voltage regulating switches, single-phase transformer (T) M The primary winding has a center tap (O) M Single-phase transformer (T) M The two ends of the primary winding are respectively connected to the phase line (L1) and the phase line (L2), and the intermediate tap (O) M Connecting a single-phase transformer (T) T The first end of the primary winding; a single-phase transformer (T T The second end of the primary winding is connected to the phase line (L3); The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) each include a plurality of taps, and two voltage regulating switches are respectively used to connect the secondary winding of the single-phase transformer (T M ) or any one of the plurality of taps of the secondary winding of the single-phase transformer (T T ), the connected tap is connected to an outgoing line through the voltage regulating switch, and the voltage between the outgoing line connected by the voltage regulating switch and the outgoing line at one end of the corresponding secondary winding of the single-phase transformer (T M ) or the single-phase transformer (T T ) is the output voltage of the secondary winding of the single-phase transformer (T M ) or the single-phase transformer (T T ). The phase difference between the secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) is 90°. The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) are connected in series, and the series connection point is connected to a common terminal (P0). The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) are connected to two other terminals of the common terminal, which are two-phase electric output phase line terminals. The output voltage of the two-phase voltage regulating transformer includes the output voltages of the single-phase transformer (T M ) and the single-phase transformer (T T ). The output voltage of the two-phase voltage regulating transformer is an amplitude modulation voltage. The voltage regulating switch is used to adjust the amplitude of the amplitude modulation voltage by connecting different taps. The two-phase phase-shifting transformer comprises a first single-phase transformer, a second single-phase transformer, a voltage regulating switch assembly (S T1 ), a voltage regulating switch assembly (S T2 ), a voltage regulating switch assembly (S M1 ), and a voltage regulating switch assembly (S M2 ); the secondary side of the first single-phase transformer comprises a winding (T T1 ) and a winding (T T2 ), and the secondary side of the second single-phase transformer comprises a winding (T M1 ) and a winding (T M2 ); the windings (T T1 ), (T T2 ), (T M1 ), and (T M2 ) each have multiple taps; the voltage regulating switch assembly (S T1 ) is used to connect any one of the multiple taps of the winding (T T1 ); the voltage regulating switch assembly (S T2 ) is used to connect any one of the multiple taps of the winding (T T2 ); the voltage regulating switch assembly (S M1 ) is used to connect any one of the multiple taps of the winding (T M1 ); and the voltage regulating switch assembly (S M2 ) is used to connect any one of the multiple taps of the winding (T M2 ). The voltage regulating switch assemblies (S T1 ) and (S T2 ) are respectively used to regulate the output voltages of the windings (T T1 ) and (T T2 ) and make the output voltages equal; the voltage regulating switch assemblies (S M1 ) and (S M2 ) are respectively used to regulate the output voltages of the windings (T M1 ) and (T M2 ) and make the output voltages equal. The input voltage of the first single-phase transformer primary winding comprises the voltage of winding (T M1 ) and the phase voltage accessed by winding (T M1 ); the input voltage of the second single-phase transformer primary winding comprises the voltage of winding (T T1 ) and the phase voltage accessed by winding (T T1 ); The output voltage of the two-phase phase-shifting transformer includes: a single-phase voltage (U T ) between the common terminal (P0) and the phase-regulated voltage output terminal (P1), and a single-phase voltage (U M ) between the common terminal (P0) and the phase-regulated voltage output terminal (P2), the output voltage of the two-phase phase-shifting transformer being a phase-regulated voltage; the first voltage-regulating switch assembly and the second voltage-regulating switch assembly are used to adjust the phase of the phase-regulated voltage by connecting different taps; The output voltage of the flexible in-phase power supply device comprises a single-phase voltage (U T ) and / or a single-phase voltage (U M ).

31. A flexible phase aligned power supply device according to claim 30, wherein, The plurality of taps includes a center tap, and the voltage regulating switch assembly (S T1 ), the voltage regulating switch assembly (S T2 ), the voltage regulating switch assembly (S M1 ), and the voltage regulating switch assembly (S M2 ) each include a voltage regulating switch. The voltage regulating switch The voltage regulating switch assembly (S T1 ), voltage regulating switch assembly (S T2 ), voltage regulating switch assembly (S M1 ) and voltage regulating switch assembly (S M2 ) are used to connect any one of the multiple taps of the winding (T T1 ), winding (T T2 ), winding (T M1 ) and winding (T M2 ) respectively, and the connected tap is connected to the outgoing line through the voltage regulating switch assembly (S T1 ), voltage regulating switch assembly (S T2 ), voltage regulating switch assembly (S M1 ) and voltage regulating switch assembly (S M2 ) respectively, and the voltage between the outgoing line connected by the voltage regulating switch assembly (S T1 ) and the middle tap of the winding (T T1 ) is the output voltage of the winding (T T1 ); the voltage between the outgoing line connected by the voltage regulating switch assembly (S T2 ) and the middle tap of the winding (T T2 ) is the output voltage of the winding (T T2 ); the voltage between the outgoing line connected by the voltage regulating switch assembly (S M1 ) and the middle tap of the winding (T M1 ) is the output voltage of the winding (T M1 ); the voltage between the outgoing line connected by the voltage regulating switch assembly (S M2 ) and the middle tap of the winding (T M2 ) is the output voltage of the winding (T M2 ).

32. A flexible phase aligned power supply device according to claim 30, wherein, The voltage regulating switch assembly (S T1 ), the voltage regulating switch assembly (S T2 ), the voltage regulating switch assembly (S M1 ) and the voltage regulating switch assembly (S M2 ) are the same structure, all including single-pole double-throw switch (K S ), voltage regulating switch (S r ), switch (K1), switch (K2); wherein, the single-pole double-throw switch (K S ), the switch (K1) and the switch (K2) are switching switches; The winding (T T1 ), winding (T T2 ), winding (T M1 ) and winding (T M2 ) are of the same structure; two ends of the winding (T T1 ), winding (T T2 ), winding (T M1 ) or winding (T M2 ) are connected to two static point connection terminals of the single-pole double-throw switch (K S ); the voltage regulating switch (S r ) and the first end of the switch (K1) are connected through a lead-out wire; a switch (K2) is connected between the lead-out wire of the second end of the switch (K1) and the lead-out wire of the moving point connection terminal of the single-pole double-throw switch (K S ), and the voltage across the two ends of the switch (K2) is the output voltage of the winding (T T1 ), winding (T T2 ), winding (T M1 ) or winding (T M2 ).

33. A flexible phase aligned power supply device according to claim 30, wherein, The phase-shifting transformer is a two-phase phase-shifting transformer, and the voltage-regulating transformer is a two-phase voltage-regulating transformer; a three-phase input voltage is input into the flexible in-phase power supply device through phase lines (L1), (L2) and (L3); Among them, two-phase voltage regulating transformers include single-phase transformers (T M ) and single-phase transformer (T T ) and two voltage regulating switches, single-phase transformer (T) M The primary winding has a center tap (O) M Single-phase transformer (T) M The two ends of the primary winding are respectively connected to the phase line (L1) and the phase line (L2), and the intermediate tap (O) M Connecting a single-phase transformer (T) T The first end of the primary winding; a single-phase transformer (T T The second end of the primary winding is connected to the phase line (L3); The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) each include a plurality of taps, and two voltage regulating switches are respectively used to connect the secondary winding of the single-phase transformer (T M ) or any one of the plurality of taps of the secondary winding of the single-phase transformer (T T ). The connected tap is connected to an outgoing line through the voltage regulating switch. The voltage between the outgoing line connected by the voltage regulating switch and the outgoing line at one end of the corresponding secondary winding of the single-phase transformer (T M ) or the single-phase transformer (T T ) is the output voltage of the secondary winding of the single-phase transformer (T M ) or the single-phase transformer (T T ). The phase difference between the secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) is 90°. The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) are connected in series, and the series connection point is connected to a common terminal (P0). The secondary winding of the single-phase transformer (T M ) and the secondary winding of the single-phase transformer (T T ) are connected to the other two terminals of the common terminal, which are two-phase electric output phase line terminals. The output voltage of the two-phase voltage regulating transformer includes the output voltages of the single-phase transformer (T M ) and the single-phase transformer (T T ). The output voltage of the two-phase voltage regulating transformer is an amplitude modulation voltage. The voltage regulating switch is used to adjust the amplitude of the amplitude modulation voltage by connecting different taps. The two-phase phase-shifting transformer comprises a single-phase transformer (T S1 ), a single-phase transformer (T S2 ), a voltage regulating switch (S M1 ), a voltage regulating switch (S M2 ), a voltage regulating switch (S T1 ) and a voltage regulating switch (S T2 ); the secondary winding of the single-phase transformer (T S1 ) and the single-phase transformer (T S2 ) each has a plurality of taps, including an intermediate tap. The voltage regulating switch (S T1 ) and the voltage regulating switch (S T2 ) are respectively used to connect any one of a plurality of taps of the secondary winding of the single-phase transformer (T S1 ), and the connected tap is connected to the outgoing line through the voltage regulating switch (S T1 ) and the voltage regulating switch (S T2 ) respectively, and the outgoing line connected by the voltage regulating switch (S T1 ) and the outgoing line connected by the voltage regulating switch (S T2 ) are the output voltage of the secondary winding of the single-phase transformer (T S1 ). The voltage regulating switch (S M1 ) and the voltage regulating switch (S M2 ) are used to connect any one of a plurality of taps of the secondary winding of the single-phase transformer (T S2 ), the connected tap is connected to the outgoing line through the voltage regulating switch (S M1 ) and the voltage regulating switch (S M2 ) respectively, and the voltage between the outgoing line connected by the voltage regulating switch (S M1 ) and the outgoing line connected by the voltage regulating switch (S M2 ) is the output voltage of the secondary winding of the single-phase transformer (T S2 ). The voltage regulating switch (S T1 ) connects one phase line of the phase voltage through a lead wire as an input terminal of the two-phase phase-shifting transformer, and the voltage regulating switch (S T2 ) connects one output terminal (P1) of the two-phase phase-shifting transformer through a lead wire. The voltage regulating switch (S M1 ) connects one phase line of the phase voltage through a lead as an input of the two-phase phase-shifting transformer, and the voltage regulating switch (S M2 ) connects one output (P2) of the two-phase phase-shifting transformer through a lead. The input voltage of the primary winding of the single-phase transformer (T S2 ) includes the phase voltage accessed by the secondary winding of the single-phase transformer (T S1 ) and the voltage between the voltage regulating switch (S T1 ) and the intermediate tap of the secondary winding of the single-phase transformer (T S1 ); the input voltage of the primary winding of the single-phase transformer (T S1 ) includes the phase voltage accessed by the secondary winding of the single-phase transformer (T S2 ) and the voltage between the voltage regulating switch (S T2 ) and the intermediate tap of the secondary winding of the single-phase transformer (T S2 ); The voltage regulating switch (S) T1 ), voltage regulating switch (S) T2 ) used to adjust the single-phase transformer (T) S1 The output voltage on both sides of the middle tap of the secondary winding is equalized; the voltage regulating switch (S) M1 ), voltage regulating switch (S) M2 ) used to adjust the single-phase transformer (T) S2 The output voltage of the intermediate tap of the secondary winding is equal to the output voltage of the secondary winding. The output voltage of the two-phase phase-shifting transformer comprises: a single-phase voltage (U T ) between the common terminal (P0) and the phase-regulated voltage output terminal (P1), and a single-phase voltage (U M ) between the common terminal (P0) and the phase-regulated voltage output terminal (P2), the output voltage of the two-phase phase-shifting transformer being a phase-regulated voltage; the voltage-regulating switch (S T2 ), the voltage-regulating switch (S M2 ) component is used to adjust the phase of the phase-regulated voltage by connecting different taps. The output voltage of the flexible in-phase power supply device comprises a single-phase voltage (U T ) and / or a single-phase voltage (U M ).

34. A flexible phase aligned power supply apparatus as claimed in any of claims 26 to 33, wherein, The flexible in-phase power supply device further comprises an output voltage continuous and adjustable voltage source, which is cooperatively adjusted with the phase-shifting transformer and the voltage-regulating transformer, so as to continuously adjust the amplitude and phase of the output voltage of the flexible in-phase power supply device; The output voltage continuous and adjustable voltage source is connected in series at one or more of the output voltage loop, the input voltage loop, the phase-regulating voltage loop or the amplitude-regulating voltage loop of the flexible in-phase power supply device.

35. The flexible, single-phase power supply of claim 34, wherein: The flexible in-phase power supply device further comprises a compensation inverter, and the output voltage continuous and adjustable voltage source is an inverter, and the compensation inverter and the inverter share a DC bus; The AC side of the compensation inverter is connected to a three-phase voltage port or a plurality of single-phase AC voltage ports on the main circuit of the flexible in-phase power supply device; Alternatively, The AC side of the compensation inverter is connected to a three-phase voltage port or a plurality of single-phase AC voltage ports on the main circuit of the flexible in-phase power supply device through an isolation transformer; The voltages of the plurality of single-phase AC voltage ports have a plurality of different voltage phases; the compensation inverter is used to take power from the main circuit, to govern the reactive power and negative sequence of the traction load, and / or to provide power support for the inverter as the output voltage continuous and adjustable voltage source to output voltage.

36. A flexible phase aligned power supply device according to claim 35, wherein, The flexible in-phase power supply device further comprises a bridge inverter, the bridge inverter and the inverter share a DC bus, and the AC side of the bridge inverter is connected to a three-phase voltage port or a plurality of single-phase AC voltage ports of the rail transit power distribution system; Alternatively, The AC side of the bridge inverter is connected to a three-phase voltage port or a plurality of single-phase AC voltage ports of the rail transit power distribution system through a transformer; The bridge inverter is used to take power from the rail transit power distribution system, to provide power support for the inverter as the output voltage continuous and adjustable voltage source to output voltage; The bridge inverter is also used to cooperate with the inverter and / or the compensation inverter sharing the DC bus, to control the exchange of electric energy between the traction power supply system and the rail transit power distribution system.

37. A multi-source flexible through-phase power supply system, characterized in that, The traction power supply system comprises an external incoming line power source, a plurality of traction substations, and a traction network that electrically penetrates the entire line, wherein, among the plurality of traction substations, at most one traction substation is a non-voltage-regulating traction substation, and the remaining traction substations are voltage-regulating traction substations, and among the voltage-regulating traction substations, at least one traction substation is a traction substation comprising the flexible in-phase power supply device according to any one of claims 1-36. Each of the traction substations corresponds to at least one of the external power supply lines, and the adjustable-voltage traction substation is configured to adjust the phase and amplitude of the voltage input from the corresponding external power supply line, and the output voltage of the traction substation is a traction power supply voltage, which is delivered to the traction network. The adjustable-voltage traction substations adjust their output voltages so that the voltage difference between the output voltages of all traction substations is less than a voltage threshold. Alternatively, The adjustable-voltage traction substations adjust the relative values of the output voltages between the traction substations, and control the distribution of traction load power flow between the traction substations by adjusting the relative values, or respond to the demand for external auxiliary services of the traction substations.

38. An uninterruptible traction power supply system, characterized by The traction power supply system comprises external power supply lines, traction substations, a traction network and electrical segments, wherein, of the traction substations, at most one traction substation is a non-adjustable-voltage traction substation, and the rest are adjustable-voltage traction substations, and of the adjustable-voltage traction substations, at least one traction substation is a traction substation comprising the flexible in-phase power supply device according to any one of claims 1-36. Each of the traction substations corresponds to at least one of the external power supply lines, and the adjustable-voltage traction substation is configured to adjust the phase and amplitude of the voltage input from the corresponding external power supply line, and the output voltage of the traction substation is a traction power supply voltage, which is delivered to the traction network. The electrical segments are arranged on the traction network between every two adjacent traction substations, and divide the traction network into multiple segments, and the traction network of each segment is supplied by the traction substations connected to the traction network of the segment. The adjustable-voltage traction substations adjust the phase and amplitude of their output voltages so that the phase and amplitude of the output voltages of all traction substations are equal. Alternatively, The adjustable-voltage traction substations dynamically adjust the phase and amplitude of their output voltages, and when a vehicle needs to cross an electrical segment, at least one traction substation on each side of the electrical segment to be crossed adjusts the phase and amplitude of its output voltage so that the phase and amplitude of the voltages on both sides of the electrical segment to be crossed are equal.

39. An uninterruptible traction power supply system as claimed in any one of claim 38, characterised in that, The traction power supply system further comprises a power blending device, which is connected in parallel to the electrical segment, and the power blending device is an AC / DC / AC converter, and the power blending device is configured to adjust the power flow between the traction substations.

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