A direct current power supply system based on panama power supply

Abstract

The utility model provides a kind of direct current power supply system based on Panama power supply, comprising: phase-shift transformer, power conversion module and power supply module: power conversion module is connected with phase-shift transformer and power supply module respectively;Phase-shift transformer includes N secondary side windings, each secondary side winding has only corresponding phase-shift angle;Power conversion module includes multiple power conversion units, and the number of power conversion unit is equal to the number of secondary side windings;Power supply module includes power supply unit;N secondary side windings are connected one by one with N power conversion units;Each power supply unit is connected with power conversion unit by total direct current bus;Each power conversion unit includes first AC / DC converter and first DC / DC converter, or includes second AC / DC conversion unit;The voltage of total direct current bus is equal to the output voltage of the power conversion unit, and the standard output voltage of power conversion unit is K i times of nominal voltage.The application can reduce direct current power supply cost.

Description

Technical Field

[0001] This utility model relates to the field of power supply equipment technology, specifically to a DC power supply system based on Panama power. Background Technology

[0002] With the development of internet communication technology, the construction and operation of data centers have become commonplace. The power supply system of a data center is a critical infrastructure, providing uninterrupted power to ensure the normal operation of data center equipment.

[0003] To achieve high reliability and efficiency in data center operations, major internet companies are researching and exploring suitable power supply and distribution models. Among various power supply solutions, the Panama Canal power supply solution is favored by major internet companies due to its advantages over traditional power supply solutions, such as smaller footprint, simpler architecture, and higher reliability. The output DC bus voltage of the Panama Canal power supply solution is typically selected based on the voltage range provided by industry standards for DC power supply in data centers. However, to ensure that downstream power distribution switches, cables, server power supplies, etc., meet the operating voltage requirements, the power distribution switches and cables must be selected according to the lowest operating voltage. For the same system power, the lower the output voltage, the greater the current, the larger the switch capacity, and the thicker the cables, resulting in higher costs for the downstream DC power distribution system. Simultaneously, a larger bus current also increases cable power consumption, leading to energy waste. Therefore, reducing power supply costs has become a crucial issue that urgently needs to be addressed in this field. Utility Model Content

[0004] To address the problems in the prior art, this utility model provides a DC power supply system based on Panama power, which can at least partially solve the problems existing in the prior art.

[0005] This utility model provides a DC power supply system based on Panama Power, including a phase-shifting transformer, a power conversion module, and a power supply module: one end of the power conversion module is connected to the phase-shifting transformer, and the other end is connected to the power supply module;

[0006] A phase-shifting transformer consists of N secondary windings, each secondary winding having a unique corresponding phase shift angle, where N is a positive integer greater than or equal to 2;

[0007] The power conversion module includes multiple power conversion units, the number of which is equal to the number of secondary windings; the power supply module includes at least one power supply unit.

[0008] N secondary windings are connected one-to-one with N power conversion units; each power supply unit is connected to at least one power conversion unit through the main DC bus.

[0009] Each power conversion unit includes a first AC / DC converter and a first DC / DC converter, or includes a second AC / DC conversion unit;

[0010] When the power conversion unit includes a first AC / DC converter and a first DC / DC converter: the number of first AC / DC converters is greater than or equal to 1, and the number of first DC / DC converters is K. i Each first AC / DC converter is connected to its corresponding secondary winding, and each first AC / DC converter is also connected to at least one first DC / DC converter. i Each first DC / DC converter is connected in series to the power supply unit via a main DC bus, and the output voltage of a single first DC / DC converter is the nominal voltage; when the power conversion unit includes a second AC / DC converter, the number of second AC / DC converters is K. i Each second AC / DC converter is connected to its corresponding secondary winding, K i Each second AC / DC converter is connected in series to the power supply unit via the main DC bus, and the output voltage of a single second AC / DC converter is the nominal voltage; where K i is a positive integer greater than or equal to 2, and i is a positive integer less than or equal to N;

[0011] The voltage of the total DC bus is equal to the output voltage of the power conversion unit, where the standard output voltage of the power conversion unit is K times the nominal voltage. i times.

[0012] Furthermore, each power supply unit includes K i A first power supply unit, wherein:

[0013] K in each power supply unit i A first power supply is connected in series, and two adjacent first power supplies share a common connection line. One end of the common connection line is connected to the connection midpoint of the two adjacent and series-connected first power supplies.

[0014] When the power conversion unit connected to the power supply unit includes at least one first AC / DC converter and K i When a first DC / DC converter is used, the other end of the common connection line is connected to the midpoint of the connection between two adjacent first DC / DC converters; when the power conversion unit connected to the power supply unit includes K i When there is a second AC / DC converter, the other end of the common connection line is connected to the midpoint of the connection between the two adjacent second AC / DC converters.

[0015] Each power supply unit includes K i - 1 common connection line;

[0016] The input voltage of each first power supply is the nominal voltage.

[0017] Furthermore, each power supply unit includes one second power supply unit;

[0018] When the power conversion unit connected to the power supply unit includes at least one first AC / DC converter and K i When the first DC / DC converter is used, K i The first DC / DC converter is connected in series and then connected to the second power supply through the main DC bus;

[0019] When the power conversion unit connected to the power supply unit includes K i When the second AC / DC converter is used, K i The AC / DC converters are connected in series and then connected to the second power supply via the main DC bus.

[0020] The input voltage of each secondary power supply is K of the nominal voltage. i times.

[0021] Furthermore, the power conversion unit includes a first AC / DC converter and a first DC / DC converter, wherein:

[0022] The first AC / DC converter is used to convert the alternating current from the corresponding secondary winding into a second direct current, and the first DC / DC converter is used to convert the second direct current into a first direct current output.

[0023] Furthermore, the power conversion module includes a second AC / DC converter, wherein:

[0024] The second AC / DC converter is used to convert the AC power from the corresponding secondary winding into the first DC power output.

[0025] Furthermore, the i-th power conversion unit also includes K i The first capacitor is connected in series;

[0026] When the power conversion unit includes at least one first AC / DC converter and K i When the first DC / DC converter is used, K i The first capacitor and K i Each of the first DC / DC converters is connected in a one-to-one correspondence, wherein the first capacitor is connected in parallel with the output terminal of the first DC / DC converter;

[0027] When the power conversion unit includes K i When the second AC / DC converter is used, K i The first capacitor and K iEach of the second AC / DC converters is connected in a one-to-one correspondence, wherein the first capacitor is connected in parallel with the output terminal of the second AC / DC converter.

[0028] Furthermore, the DC power supply system based on Panama power proposed in this utility model also includes an energy storage module, wherein the energy storage module is connected to the power conversion unit.

[0029] Furthermore, each power conversion unit block also includes K i A second DC / DC converter connected in series;

[0030] When the power conversion unit includes at least one first AC / DC converter and K i When the first DC / DC converter is used, K i The second DC / DC converter and K i Each first DC / DC converter is connected in a one-to-one correspondence, wherein the first end of the second DC / DC converter is connected to the energy storage module, and the second end is connected to the first DC / DC converter;

[0031] When the power conversion unit includes K i When the second AC / DC converter is used, K i The second DC / DC converter and K i Each second AC / DC converter is connected in a one-to-one correspondence, wherein the first end of the second DC / DC converter is connected to the energy storage module, and the second end is connected to the first DC / DC converter.

[0032] Furthermore, the power conversion unit also includes K i A second capacitor connected in series;

[0033] K i The second capacitor and K i Each of the second DC / DC converters is connected in a one-to-one correspondence, wherein the second capacitor is connected in parallel with the second terminal of the second DC / DC converter.

[0034] Furthermore, each secondary winding comprises n sub-windings, where n is greater than or equal to 2, where:

[0035] When the power conversion unit includes the first AC / DC converter and K i When there are n first DC / DC converters connected in series, the number of first AC / DC converters is greater than or equal to n, wherein each sub-winding is connected to at least one first AC / DC converter, and each first AC / DC converter is connected to at least one first DC / DC converter. i The first DC / DC converters are connected in series and then connected to the power supply unit via the main DC bus;

[0036] When the power conversion unit includes K iWhen there are two second AC / DC converters connected in series, where each sub-winding is connected to at least one second AC / DC converter, K i The second AC / DC converter is connected in series and then connected to the power supply unit via the main DC bus.

[0037] The DC power supply system based on Panama Power provided in this embodiment includes a phase-shifting transformer, a power conversion module, and a power supply module. One end of the power conversion module is connected to the phase-shifting transformer, and the other end is connected to the power supply module. The phase-shifting transformer includes N secondary windings, each secondary winding having a unique corresponding phase shift angle, where N is a positive integer greater than or equal to 2. The power conversion module includes multiple power conversion units, the number of which is equal to the number of secondary windings. The power supply module includes at least one power supply unit. The N secondary windings are connected one-to-one with the N power conversion units. Each power supply unit is connected to at least one power conversion unit via a main DC bus. Each power conversion unit includes a first AC / DC converter and a first DC / DC converter, or includes a second AC / DC converter. When the power conversion unit includes a first AC / DC converter and a first DC / DC converter: the number of first AC / DC converters is greater than or equal to 1, and the number of first DC / DC converters is K. i Each first AC / DC converter is connected to its corresponding secondary winding, and each first AC / DC converter is also connected to at least one first DC / DC converter. i Each first DC / DC converter is connected in series to the power supply unit via a main DC bus, and the output voltage of a single first DC / DC converter is the nominal voltage; when the power conversion unit includes a second AC / DC converter, the number of second AC / DC converters is K. i Each second AC / DC converter is connected to its corresponding secondary winding, K i Each second AC / DC converter is connected in series to the power supply unit via the main DC bus, and the output voltage of a single second AC / DC converter is the nominal voltage; where K i is a positive integer greater than or equal to 2, and i is a positive integer less than or equal to N; the voltage of the total DC bus is equal to the output voltage of the power conversion unit, where the standard output voltage of the power conversion unit is K times the nominal voltage. i This reduces the current in the total DC bus, thereby reducing cable power consumption and enabling compatibility with both power supply modules, thus lowering the cost of DC power supply. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0039] Figure 1 This is a schematic diagram of the structure of the DC power supply system based on the Panama Power Supply provided in the first embodiment of this application;

[0040] Figure 2 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the second embodiment of this application;

[0041] Figure 3 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the third embodiment of this utility model.

[0042] Figure 4 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the fourth embodiment of this utility model.

[0043] Figure 5 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the fifth embodiment of this utility model.

[0044] Figure 6 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the sixth embodiment of this utility model.

[0045] Figure 7 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the seventh embodiment of this utility model.

[0046] Figure 8 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the eighth embodiment of this utility model.

[0047] Figure 9 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the ninth embodiment of this utility model.

[0048] Figure 10 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the tenth embodiment of this utility model.

[0049] Figure 11 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the eleventh embodiment of this utility model.

[0050] Figure 12This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twelfth embodiment of this utility model.

[0051] Figure 13 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the thirteenth embodiment of this utility model.

[0052] Figure 14 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the fourteenth embodiment of this utility model.

[0053] Figure 15 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the fifteenth embodiment of this utility model.

[0054] Figure 16 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the sixteenth embodiment of this utility model.

[0055] Figure 17 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the seventeenth embodiment of this utility model.

[0056] Figure 18 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the eighteenth embodiment of this utility model.

[0057] Figure 19 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the nineteenth embodiment of this utility model.

[0058] Figure 20 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twentieth embodiment of this utility model.

[0059] Figure 21 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-first embodiment of this utility model.

[0060] Figure 22 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-second embodiment of this utility model.

[0061] Figure 23 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-third embodiment of this utility model.

[0062] Figure 24 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-fourth embodiment of this utility model.

[0063] Figure 25This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-fifth embodiment of this utility model.

[0064] Figure 26 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-sixth embodiment of this utility model.

[0065] Figure 27 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-seventh embodiment of this utility model.

[0066] Figure 28 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-eighth embodiment of this utility model.

[0067] Figure 29 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the twenty-ninth embodiment of this utility model.

[0068] Figure 30 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the thirtieth embodiment of this utility model.

[0069] Figure 31 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the thirty-first embodiment of this utility model.

[0070] Figure 32 This is a schematic diagram of the structure of a DC power supply system based on Panama power supply provided in the thirty-second embodiment of this utility model. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of this utility model are used to explain this utility model, but are not intended to limit this utility model. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other. The acquisition, storage, use, and processing of data in the technical solutions of this application all comply with relevant laws and regulations. The user information in the embodiments of this application is obtained through legal and compliant means, and the acquisition, storage, use, and processing of user information have been authorized and agreed upon by the customer.

[0072] To facilitate understanding of the technical solution provided in this application, the relevant content of the technical solution in this application will be explained below.

[0073] To reduce the power supply cost of the Panama power supply solution, this application proposes a DC power supply system based on the Panama power supply. By increasing the output voltage of the power conversion module, the bus voltage is increased, the bus current is reduced, and cable losses are decreased. Due to the increased output voltage, the current decreases, resulting in smaller switching capacity and thinner cables, thus lowering the cost and reducing losses of the downstream DC power distribution system.

[0074] Furthermore, in existing technologies, energy storage batteries are directly connected in parallel to the DC bus. When the load changes, the energy storage battery discharges to the load, while the power conversion module charges the energy storage battery, leading to an increase in the number of charge-discharge cycles and a reduction in the battery's lifespan. In this application, the energy storage module is no longer connected in parallel to the output side of the power conversion module, but is instead connected to the rectifier stage. This allows for more effective control of the energy storage module's charging and discharging, thus improving its lifespan.

[0075] like Figures 1 to 9 As shown, the DC power supply system based on the Panama Power Supply provided in this embodiment of the present invention includes a phase-shifting transformer 1, a power conversion module 2, and a power supply module 3.

[0076] One end of the power conversion module 2 is connected to the phase shifting transformer 1, and the other end of the power conversion module 2 is connected to the power supply module 3.

[0077] The phase-shifting transformer 1 includes N secondary windings, each secondary winding having a unique corresponding phase shift angle, where N is a positive integer greater than or equal to 2;

[0078] The power conversion module 2 includes multiple power conversion units, the number of which is equal to the number of secondary windings; the power supply module 3 includes at least one power supply unit.

[0079] N secondary windings are connected one-to-one with N power conversion units; each power supply unit is connected to at least one power conversion unit via a total DC bus.

[0080] Each power conversion unit includes a first AC / DC converter and a first DC / DC converter, or each of the power conversion units includes a second AC / DC converter;

[0081] When the power conversion unit includes a first AC / DC converter and a first DC / DC converter: the number of first AC / DC converters is greater than or equal to 1, and the number of first DC / DC converters is K. i Each first AC / DC converter is connected to its corresponding secondary winding, and each first AC / DC converter is also connected to at least one first DC / DC converter. iEach first DC / DC converter is connected in series to the power supply unit via a main DC bus, and the output voltage of a single first DC / DC converter is the nominal voltage; when the power conversion unit includes a second AC / DC converter, the number of second AC / DC converters is K. i Each second AC / DC converter is connected to its corresponding secondary winding, K i Each second AC / DC converter is connected in series to the power supply unit via the main DC bus, and the output voltage of a single second AC / DC converter is the nominal voltage; where K i is a positive integer greater than or equal to 2, and i is a positive integer less than or equal to N;

[0082] The voltage of the total DC bus is equal to the output voltage of the power conversion unit, where the standard output voltage of the power conversion unit is K times the nominal voltage. i times.

[0083] Specifically, the phase-shifting transformer 1 may include a primary winding 102 and N secondary windings. The primary winding 102 is connected to a first AC current, such as 10kV AC current. The phase-shifting transformer 1 is used to convert the external first AC current into a second AC current. The voltage corresponding to the first AC current is higher than the voltage corresponding to the second AC current. The second AC current is output to the power conversion units corresponding to the N secondary windings through the N secondary windings. The i-th secondary winding has a one-to-one corresponding power conversion unit, that is, a power conversion unit connected to the i-th secondary winding. Each secondary winding has a unique corresponding phase shift angle, that is, the phase shift angles of each secondary winding are different. The output voltages of the N secondary windings can be the same, or there can be secondary windings with different output voltages among the N secondary windings. The voltages of the first AC current and the second AC current are set according to actual needs, and this embodiment of the present invention does not limit them. The number of secondary windings is set according to actual needs, and this embodiment of the present invention does not limit them. N is a positive integer greater than or equal to 2.

[0084] Power conversion module 2 includes multiple power conversion units, the number of which is equal to the number of secondary windings; power supply module 3 includes at least one power supply unit. N secondary windings are connected one-to-one with N power conversion units, meaning the output terminal of each secondary winding is connected to the input terminal of the corresponding power conversion unit. The power conversion units convert the input AC power into a first DC power, which is then transmitted to power supply module 3 via a main DC bus. Each power supply unit is connected to at least one power conversion unit and supplies power to the load.

[0085] The standard output voltage of the power conversion unit corresponding to the i-th secondary winding is K of the nominal voltage. iThe nominal voltage is, for example, taken within the range of 200-288V specified in "YD / T 2378-2020 240V DC Power Supply System for Communication", or within the range of 270-4100V specified in "YD / T 3089 336V DC Power Supply System for Communication". The standard output voltage of the power conversion units corresponding to each secondary winding can be the same, or there can be power conversion units with different standard output voltages among the N secondary windings. The voltage of the total DC bus is equal to the output voltage of the connected power conversion units. Where K... i is a positive integer greater than or equal to 2, and i is a positive integer less than or equal to N.

[0086] By increasing the standard output voltage of the power conversion unit, the current in the total DC bus can be reduced for the same system power, thus decreasing cable power consumption and lowering DC power supply costs. Furthermore, the increased output voltage of the DC power supply system results in lower current, which helps reduce the cost of downstream DC distribution systems.

[0087] For example, such as Figure 1 As shown, the DC power supply system based on the Panama Power Supply includes a phase-shifting transformer 1, a power conversion module 2, and a power supply module 3. One end of the power conversion module 2 is connected to the phase-shifting transformer 1, and the other end of the power conversion module 2 is connected to the power supply module 3. The phase-shifting transformer 1 includes three secondary windings: secondary winding 101-1, secondary winding 101-2, and secondary winding 101-3, each secondary winding having a unique corresponding phase shift angle.

[0088] Power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. The input terminal of power conversion unit 2-1 is connected to the output terminal of secondary winding 101-1, the input terminal of power conversion unit 2-2 is connected to the output terminal of secondary winding 101-2, and the input terminal of power conversion unit 2-3 is connected to the output terminal of secondary winding 101-3. Power conversion unit 2-1 is connected to power supply unit 3-1 through main DC buses 4-1 and 4-2. The standard output voltage of power conversion unit 2-1 is K of the nominal voltage. i The voltages of the main DC buses 4-1 and 4-2 are equal to the output voltage of the power conversion unit 2-1, and the input voltage of the power supply unit 3-1 is equal to K. i The power conversion unit 2-2 is connected to the power supply unit 3-2 via the main DC bus 4-3 and 4-4. The standard output voltage of the power conversion unit 2-2 is K times the nominal voltage. iThe voltages of the main DC buses 4-3 and 4-4 are equal to the output voltage of power conversion unit 2-2, and the input voltage of power supply unit 3-2 is equal to K. i The power conversion unit 2-3 is connected to the power supply unit 3-3 via the main DC bus 4-5 and 4-6. The standard output voltage of the power conversion unit 2-3 is K times the nominal voltage. i The voltages of the main DC buses 4-5 and 4-6 are equal to the output voltage of power conversion unit 2-3, and the input voltage of power supply unit 3-3 is equal to K. i The standard output voltage is times the nominal voltage. The standard output voltage of each power conversion unit may differ.

[0089] For example, such as Figure 2 As shown, the DC power supply system based on the Panama Power Supply includes a phase-shifting transformer 1, a power conversion module 2, and a power supply module 3. One end of the power conversion module 2 is connected to the phase-shifting transformer 1, and the other end of the power conversion module 2 is connected to the power supply module 3. The phase-shifting transformer 1 includes three secondary windings: secondary winding 101-1, secondary winding 101-2, and secondary winding 101-3, each secondary winding having a unique corresponding phase shift angle.

[0090] Power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1 and power supply unit 3-2. The input terminal of power conversion unit 2-1 is connected to the output terminal of secondary winding 101-1, and the output terminal of power conversion unit 2-1 is connected to the main DC bus 4-1 and 4-2. The input terminal of power conversion unit 2-2 is connected to the output terminal of secondary winding 101-2, and the output terminal of power conversion unit 2-2 is connected to the main DC bus 4-3 and 4-4. The input terminal of power conversion unit 2-3 is connected to the output terminal of secondary winding 101-3, and the output terminal of power conversion unit 2-3 is connected to the main DC bus 4-5 and 4-6. Main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6 are connected in parallel.

[0091] The input terminals of power supply unit 3-1 are connected to the main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6, respectively. The input terminals of power supply unit 3-2 are connected to the main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6, respectively. All power conversion units have the same standard output voltage. The standard output voltage of power conversion unit 2-1 is K times the nominal voltage. i The standard output voltage of power conversion unit 2-2 is K times the nominal voltage. iThe standard output voltage of power conversion unit 2-3 is K times the nominal voltage. i The voltages of the main DC buses 4-1 and 4-2 are equal to the output voltage of power conversion unit 2-1; the voltages of the main DC buses 4-3 and 4-4 are equal to the output voltage of power conversion unit 2-2; and the voltages of the main DC buses 4-5 and 4-6 are equal to the output voltage of power conversion unit 2-3. The input voltage of power supply unit 3-1 is equal to K. i The nominal voltage is times that of the power supply unit 3-2. The input voltage of the power supply unit 3-2 is equal to K. i The nominal voltage is times that of the standard voltage.

[0092] For example, such as Figure 3 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. The standard output voltages of each power conversion unit may be different.

[0093] Power conversion unit 2-1 includes a first AC / DC converter 201, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output of the first AC / DC converter 201. The first DC / DC converters 202-1 and 202-2 are connected in series and then connected to power supply unit 3-1 via main DC buses 4-1 and 4-2. The standard output voltage of power conversion unit 2-1 is twice the nominal voltage. The output voltages of the first DC / DC converters 202-1 and 202-2 are the nominal voltages, and the voltages of main DC buses 4-1 and 4-2 are also twice the nominal voltages. The input voltage of power supply unit 3-1 is also twice the nominal voltage.

[0094] Power conversion unit 2-2 includes a first AC / DC converter 201, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output of the first AC / DC converter 201. The first DC / DC converters 202-1 and 202-2 are connected in series and then connected to power supply unit 3-2 via the main DC buses 4-3 and 4-4. The standard output voltage of power conversion unit 2-2 is twice the nominal voltage. The output voltages of the first DC / DC converters 202-1 and 202-2 are the nominal voltages, and the voltages on the main DC buses 4-3 and 4-4 are also twice the nominal voltages. The input voltage of power supply unit 3-2 is also twice the nominal voltage.

[0095] Power conversion unit 2-3 includes a first AC / DC converter 201, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output of the first AC / DC converter 201. The first DC / DC converters 202-1 and 202-2 are connected in series and then connected to the power supply unit 3-3 via the main DC buses 4-5 and 4-6. The standard output voltage of power conversion unit 2-3 is twice the nominal voltage. The output voltages of the first DC / DC converters 202-1 and 202-2 are the nominal voltages, and the voltages on the main DC buses 4-5 and 4-6 are also twice the nominal voltages. The input voltage of power supply unit 3-3 is also twice the nominal voltage.

[0096] For example, such as Figure 4 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. The standard output voltages of each power conversion unit may be different.

[0097] Power conversion unit 2-1 includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The first DC / DC converters 202-1 and 202-2 are connected in series and then connected to the power supply unit 3-1 through the main DC buses 4-1 and 4-2. The standard output voltage of power conversion unit 2-1 is twice the nominal voltage, the output voltages of the first DC / DC converters 202-1 and 202-2 are the nominal voltages, and the voltages of the main DC buses 4-1 and 4-2 are equal to twice the nominal voltages. The input voltage of power supply unit 3-1 is twice the nominal voltage.

[0098] Power conversion unit 2-2 includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The first DC / DC converters 202-1 and 202-2 are connected in series and then connected to the power supply unit 3-2 through the main DC buses 4-3 and 4-4. The standard output voltage of power conversion unit 2-2 is twice the nominal voltage. The output voltages of the first DC / DC converters 202-1 and 202-2 are the nominal voltages, and the voltages of the main DC buses 4-3 and 4-4 are also twice the nominal voltages. The input voltage of power supply unit 3-2 is twice the nominal voltage.

[0099] Power conversion unit 2-3 includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The first DC / DC converters 202-1 and 202-2 are connected in series and then connected to the power supply unit 3-3 through the main DC buses 4-5 and 4-6. The standard output voltage of power conversion unit 2-3 is twice the nominal voltage. The output voltages of the first DC / DC converters 202-1 and 202-2 are the nominal voltages, and the voltages of the main DC buses 4-5 and 4-6 are equal to twice the nominal voltages. The input voltage of power supply unit 3-3 is twice the nominal voltage.

[0100] For example, such as Figure 5 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. The standard output voltages of each power conversion unit may be different.

[0101] Power conversion unit 2-1 includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2. The input terminals of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected to the output terminal of the secondary winding 101-1, respectively. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the power supply unit 3-1 through the main DC buses 4-1 and 4-2. The standard output voltage of power conversion unit 2-1 is twice the nominal voltage. The output voltages of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are the nominal voltages, and the voltages of the main DC buses 4-1 and 4-2 are equal to twice the nominal voltages. The input voltage of power supply unit 3-1 is also equal to twice the nominal voltage.

[0102] Power conversion unit 2-2 includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2. The input terminals of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected to the output terminals of the secondary winding 101-2, respectively. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the power supply unit 3-2 through the main DC buses 4-3 and 4-4. The standard output voltage of power conversion unit 2-2 is twice the nominal voltage. The output voltages of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are the nominal voltages, and the voltages of the main DC buses 4-3 and 4-4 are equal to twice the nominal voltages. The input voltage of power supply unit 3-3 is also equal to twice the nominal voltage.

[0103] Power conversion unit 2-3 includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2. The input terminals of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected to the output terminals of the secondary winding 101-2, respectively. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the power supply unit 3-3 through the main DC buses 4-5 and 4-6. The standard output voltage of power conversion unit 2-3 is twice the nominal voltage. The output voltages of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are the nominal voltages, and the voltages of the main DC buses 4-5 and 4-6 are equal to twice the nominal voltages. The input voltage of power supply unit 3-3 is also equal to twice the nominal voltage.

[0104] For example, such as Figure 6As shown, power conversion module 2 includes power conversion unit 2-1 and power conversion unit 2-2. Power supply module 3 includes power supply unit 3-1 and power supply unit 3-2. Each power conversion unit includes two first AC / DC converters and four first DC / DC converters.

[0105] The power conversion unit 2-1 includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, a first DC / DC converter 202-2, a first DC / DC converter 202-3, and a first DC / DC converter 202-4. The output terminals of the first AC / DC converter 201-1 are connected in parallel with the first DC / DC converters 202-1 and 202-2. The output terminals of the first AC / DC converter 201-2 are connected in parallel with the first DC / DC converters 202-3 and 202-4. The first DC / DC converters 202-1, 202-2, 202-3, and 202-4 are connected in series and then connected to the power supply unit 3-1 via the main DC buses 4-1 and 4-2. The standard output voltage of power conversion unit 2-1 is four times the nominal voltage, the output voltage of each first DC / DC converter is the nominal voltage, and the voltage of the total DC bus 4-1 and 4-2 is equal to four times the nominal voltage. The input voltage of power supply unit 3-1 is equal to four times the nominal voltage.

[0106] Power conversion unit 2-2 includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, a first DC / DC converter 202-2, a first DC / DC converter 202-3, and a first DC / DC converter 202-4. The output terminals of the first AC / DC converter 201-1 are connected in parallel with the first DC / DC converters 202-1 and 202-2. The output terminals of the first AC / DC converter 201-2 are connected in parallel with the first DC / DC converters 202-3 and 202-4. The first DC / DC converters 202-1, 202-2, 202-3, and 202-4 are connected in series and then connected to the power supply unit 3-2 via the main DC buses 4-3 and 4-4. The standard output voltage of power conversion unit 2-2 is four times the nominal voltage, the output voltage of each first DC / DC converter is the nominal voltage, and the voltage of the total DC bus 4-3 and 4-4 is equal to four times the nominal voltage. The input voltage of power supply unit 3-2 is equal to four times the nominal voltage.

[0107] For example, such as Figure 7As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1 and power supply unit 3-2.

[0108] Power conversion unit 2-1 includes a first AC / DC converter 201, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output of the first AC / DC converter 201. The first DC / DC converters 202-1 and 202-2 are connected in series to the main DC buses 4-1 and 4-2. Power conversion unit 2-2 also includes a first AC / DC converter 201, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output of the first AC / DC converter 201. The first DC / DC converters 202-1 and 202-2 are connected in series to the main DC buses 4-3 and 4-4. Power conversion unit 2-3 includes a first AC / DC converter 201, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output of the first AC / DC converter 201. The first DC / DC converters 202-1 and 202-2 are connected in series to the main DC buses 4-5 and 4-6. Main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6 are connected in parallel. The input terminals of power supply unit 3-1 are connected to the main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6, respectively. The input terminals of the power supply unit 3-2 are connected to the main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6, respectively.

[0109] All power conversion units have the same standard output voltage. The standard output voltage of power conversion unit 2-1 is twice its nominal voltage, as are those of power conversion unit 2-2 and power conversion unit 2-3. The voltages of the main DC buses 4-1 and 4-2 are equal to the output voltage of power conversion unit 2-1, 4-3 and 4-4 are equal to the output voltage of power conversion unit 2-2, and 4-5 and 4-6 are equal to the output voltage of power conversion unit 2-3. The input voltage of power supply unit 3-1 is twice its nominal voltage. The input voltage of power supply unit 3-2 is twice its nominal voltage.

[0110] For example, such as Figure 8 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1 and power supply unit 3-2. The standard output voltage of each power conversion unit is the same.

[0111] The power conversion unit 2-1 includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The first DC / DC converters 202-1 and 202-2 are connected in series to the main DC buses 4-1 and 4-2. The power conversion unit 2-2 includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The first DC / DC converters 202-1 and 202-2 are connected in series to the main DC buses 4-3 and 4-4. Power conversion unit 2-3 includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The first DC / DC converters 202-1 and 202-2 are connected in series and then connected to the main DC buses 4-5 and 4-6. The main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6 are connected in parallel. The input terminals of power supply unit 3-1 are connected to the main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6, respectively. The input terminals of the power supply unit 3-2 are connected to the main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6, respectively.

[0112] All power conversion units have the same standard output voltage. The standard output voltage of power conversion unit 2-1 is twice its nominal voltage, as are those of power conversion unit 2-2 and power conversion unit 2-3. The voltages of the main DC buses 4-1 and 4-2 are equal to the output voltage of power conversion unit 2-1, 4-3 and 4-4 are equal to the output voltage of power conversion unit 2-2, and 4-5 and 4-6 are equal to the output voltage of power conversion unit 2-3. The input voltage of power supply unit 3-1 is twice its nominal voltage. The input voltage of power supply unit 3-2 is twice its nominal voltage.

[0113] For example, such as Figure 9 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1 and power supply unit 3-2. The standard output voltage of each power conversion unit is the same.

[0114] Power conversion unit 2-1 includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2; the input terminals of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are respectively connected to the output terminal of the secondary winding 101-1; the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the main DC buses 4-1 and 4-2. Power conversion unit 2-2 includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2; the input terminals of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are respectively connected to the output terminal of the secondary winding 101-2; the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the main DC buses 4-3 and 4-4. Power conversion unit 2-3 includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2; the input terminals of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are respectively connected to the output terminal of the secondary winding 101-3; the second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the main DC buses 4-5 and 4-6. The main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6 are connected in parallel. The input terminals of power supply unit 3-1 are connected to the main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6 respectively. The input terminals of the power supply unit 3-2 are connected to the main DC buses 4-1 and 4-2, 4-3 and 4-4, and 4-5 and 4-6, respectively.

[0115] All power conversion units have the same standard output voltage. The standard output voltage of power conversion unit 2-1 is twice its nominal voltage, as are those of power conversion unit 2-2 and power conversion unit 2-3. The output voltages of the first DC / DC converters 202-1 and 202-2 are their nominal voltages. The voltages of the main DC buses 4-1 and 4-2 are equal to the output voltage of power conversion unit 2-1, the voltages of the main DC buses 4-3 and 4-4 are equal to the output voltage of power conversion unit 2-2, and the voltages of the main DC buses 4-5 and 4-6 are equal to the output voltage of power conversion unit 2-3. The input voltage of power supply unit 3-1 is twice its nominal voltage. The input voltage of power supply unit 3-2 is twice its nominal voltage.

[0116] The DC power supply system based on Panama Power provided in this embodiment includes a phase-shifting transformer, a power conversion module, and a power supply module. One end of the power conversion module is connected to the phase-shifting transformer, and the other end is connected to the power supply module. The phase-shifting transformer includes N secondary windings, each secondary winding having a unique corresponding phase shift angle, where N is a positive integer greater than or equal to 2. The power conversion module includes multiple power conversion units, the number of which is equal to the number of secondary windings. The power supply module includes at least one power supply unit. The N secondary windings are connected one-to-one with the N power conversion units. Each power supply unit is connected to at least one power conversion unit via a main DC bus. Each power conversion unit includes a first AC / DC converter and a first DC / DC converter, or includes a second AC / DC converter. When the power conversion unit includes a first AC / DC converter and a first DC / DC converter: the number of first AC / DC converters is greater than or equal to 1, and the number of first DC / DC converters is K. i Each first AC / DC converter is connected to its corresponding secondary winding, and each first AC / DC converter is also connected to at least one first DC / DC converter. i Each first DC / DC converter is connected in series to the power supply unit via a main DC bus, and the output voltage of a single first DC / DC converter is the nominal voltage; when the power conversion unit includes a second AC / DC converter, the number of second AC / DC converters is K. i Each second AC / DC converter is connected to its corresponding secondary winding, K i Each second AC / DC converter is connected in series to the power supply unit via the main DC bus, and the output voltage of a single second AC / DC converter is the nominal voltage; where K iis a positive integer greater than or equal to 2, and i is a positive integer less than or equal to N; the voltage of the total DC bus is equal to the output voltage of the power conversion unit, where the standard output voltage of the power conversion unit is K times the nominal voltage. i This reduces the current in the total DC bus, thereby reducing cable power consumption and enabling compatibility with both power supply modules, thus lowering the cost of DC power supply.

[0117] Based on the above embodiments, each power supply unit further includes K i A first power supply unit, wherein:

[0118] K in each power supply unit i A first power supply is connected in series, and two adjacent first power supplies share a common connection line. One end of the common connection line is connected to the connection midpoint of the two adjacent and series-connected first power supplies.

[0119] When the power conversion unit connected to the power supply unit includes at least one first AC / DC converter and K i When a first DC / DC converter is used, the other end of the common connection line is connected to the midpoint of the connection between two adjacent first DC / DC converters; when the power conversion unit connected to the power supply unit includes K i When there is a second AC / DC converter, the other end of the common connection line is connected to the midpoint of the connection between the two adjacent second AC / DC converters.

[0120] Each power supply unit includes K i - 1 common connection line;

[0121] The input voltage of each first power supply is the nominal voltage.

[0122] For example, such as Figure 10 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a first AC / DC converter 201 and two first DC / DC converters, with first DC / DC converters 202-1 and 202-2 connected in parallel to the output of the first AC / DC converter 201. Each power supply unit includes a first power supply 301-1 and a first power supply 301-2, which are connected in series.

[0123] The first DC / DC converter 202-1 of power conversion unit 2-1 is connected to the first power supply unit 301-1 of power supply unit 3-1 via the main DC bus 4-1 and the common connection line 5-1; the first DC / DC converter 202-2 of power conversion unit 2-1 is connected to the first power supply unit 301-2 of power supply unit 3-1 via the common connection line 5-1 and the main DC bus 4-2. The first DC / DC converter 202-1 of power conversion unit 2-2 is connected to the first power supply unit 301-1 of power supply unit 3-2 via the main DC bus 4-3 and the common connection line 5-2; the first DC / DC converter 202-2 of power conversion unit 2-2 is connected to the first power supply unit 301-2 of power supply unit 3-2 via the common connection line 5-2 and the main DC bus 4-4. The first DC / DC converter 202-1 of the power conversion unit 2-3 is connected to the first power supply unit 301-1 of the power supply unit 3-3 through the main DC bus 4-5 and the common connection line 5-3; the first DC / DC converter 202-2 of the power conversion unit 2-3 is connected to the first power supply unit 301-2 of the power supply unit 3-3 through the common connection line 5-3 and the main DC bus 4-6.

[0124] The standard output voltage of power conversion unit 2-1 is twice the nominal voltage. The output voltages of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 of power conversion unit 2-1 are equal to the nominal voltage. The input voltages of the first power supply unit 301-1 and the first power supply unit 301-2 of power supply unit 3-1 are equal to the nominal voltage. The standard output voltage of power conversion unit 2-2 is twice the nominal voltage. The output voltages of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 of power conversion unit 2-2 are equal to the nominal voltage. The input voltages of the first power supply unit 301-1 and the first power supply unit 301-2 of power supply unit 3-2 are equal to the nominal voltage. The standard output voltage of power conversion unit 2-3 is twice the nominal voltage. The output voltages of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 of power conversion unit 2-3 are equal to the nominal voltage. The input voltages of the first power supply unit 301-1 and the first power supply unit 301-2 of power supply unit 3-3 are equal to the nominal voltage.

[0125] The main DC bus 4-1 is considered the positive DC bus. The positive input terminal of the first power supply 301-1 is connected to the positive main DC bus 4-1, and the negative input terminal of the first power supply 301-1 is connected to the common connection line 5-1. The positive input terminal of the first power supply 301-2 is connected to the common connection line 5-1, and the negative input terminal of the first power supply 301-2 is connected to the negative main DC bus 4-2. The positive main DC bus 4-1 is a positive bus relative to the common connection line 5-1, and the common connection line 5-1 can be considered the negative DC bus of the first power supply 301-1; the common connection line 5-1 is a positive bus relative to the negative main DC bus 4-2, and the common connection line 5-1 can be considered the positive DC bus of the first power supply 301-2. Compared to the existing technology where the first power supply 301-1 and the first power supply 301-2 need to be connected to the positive DC bus and the negative DC bus respectively (a total of four cables), in this embodiment, since the first power supply 301-1 and the first power supply 301-2 share a common connection line 5-1, only the positive total DC bus, the negative total DC bus, and the common connection line (three cables) are needed to connect the power conversion unit 2-1 to the two first power supplies (301-1 and 301-2), saving 25% of the cables and reducing line costs and losses. The bus voltage of the positive total DC bus 4-1 and the negative total DC bus 4-2 can be twice the nominal voltage, and the first power supply 301-1 and the first power supply 301-2 can use the existing PSU, which is equivalent to increasing the bus voltage and reducing the bus equivalent current while being compatible with the input voltage level of the existing PSU, thereby reducing losses. For the positive DC bus 4-1, the current direction on the common connection line 5-1 is from the first power supply 301-1 to the power conversion module 2; for the negative DC bus 4-2, the current direction on the common connection line 5 is from the power conversion module 2 to the first power supply 301-2. There are two DC currents in opposite directions on the common connection line 5-1, which can cancel each other out, further reducing the power consumption of the cable.

[0126] Figure 10 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0127] For example, such as Figure 11As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2, which are connected in series. Each power supply unit includes a first power supply unit 301-1 and a first power supply unit 301-2, which are connected in series.

[0128] The second AC / DC converter 203-1 of power conversion unit 2-1 is connected to the first power supply unit 301-1 of power supply unit 3-1 via the main DC bus 4-1 and the common connection line 5-1; the second AC / DC converter 203-2 of power conversion unit 2-1 is connected to the first power supply unit 301-2 of power supply unit 3-1 via the common connection line 5-1 and the main DC bus 4-2. The second AC / DC converter 203-1 of power conversion unit 2-2 is connected to the first power supply unit 301-1 of power supply unit 3-2 via the main DC bus 4-3 and the common connection line 5-2; the second AC / DC converter 203-2 of power conversion unit 2-2 is connected to the first power supply unit 301-2 of power supply unit 3-2 via the common connection line 5-2 and the main DC bus 4-4. The second AC / DC converter 203-1 of the power conversion unit 2-3 is connected to the first power supply unit 301-1 of the power supply unit 3-3 through the main DC bus 4-5 and the common connection line 5-3; the second AC / DC converter 203-2 of the power conversion unit 2-3 is connected to the first power supply unit 301-2 of the power supply unit 3-3 through the common connection line 5-3 and the main DC bus 4-6.

[0129] The standard output voltage of power conversion unit 2-1 is twice the nominal voltage. The output voltages of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 of power conversion unit 2-1 are equal to the nominal voltage. The input voltages of the first power supply unit 301-1 and the first power supply unit 301-2 of power supply unit 3-1 are equal to the nominal voltage. The standard output voltage of power conversion unit 2-2 is twice the nominal voltage. The output voltages of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 of power conversion unit 2-2 are equal to the nominal voltage. The input voltages of the first power supply unit 301-1 and the first power supply unit 301-2 of power supply unit 3-2 are equal to the nominal voltage. The standard output voltage of power conversion unit 2-3 is twice the nominal voltage. The output voltage of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 of power conversion unit 2-3 is equal to the nominal voltage. The input voltage of the first power supply unit 301-1 and the first power supply unit 301-2 of power supply unit 3-3 is equal to the nominal voltage.

[0130] Figure 11 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0131] The power supply can utilize a power supply unit (PSU) from existing technology. This is equivalent to increasing the bus voltage and reducing the bus equivalent current while maintaining compatibility with the input voltage level of existing PSUs, thereby reducing line losses. Furthermore, for two adjacent power supplies, since they share a common connection line, which serves as both the positive and negative bus of one power supply and the negative bus of the other, the opposite DC currents on the common connection line can cancel each other out, further reducing cable power consumption. Moreover, the shared common connection line between adjacent power supplies saves on cabling costs.

[0132] When power supply is provided by increasing the bus voltage at the output side of power conversion module 2, the existing PSU input voltage is incompatible, making it unusable. This renders the existing power supply solutions unusable, requiring the redesign of a PSU with a higher input voltage level, which is time-consuming and cannot be implemented in the short term. However, the power supply module structure provided in this embodiment can combine existing PSUs to carry the increased bus voltage, reducing power supply costs while maintaining compatibility with existing PSUs.

[0133] like Figure 12 and Figure 13As shown, based on the above embodiments, each power supply unit further includes a second power supply unit 302;

[0134] When the power conversion unit connected to the power supply unit includes at least one first AC / DC converter and K i When the first DC / DC converter is used, K i The first DC / DC converter is connected in series and then connected to the second power supply 302 through the main DC bus;

[0135] When the power conversion unit connected to the power supply unit includes K i When the second AC / DC converter is used, K i The AC / DC converters are connected in series and then connected to the second power supply 302 via the main DC bus.

[0136] The input voltage of each second power supply 302 is K of the nominal voltage. i This means the total DC bus voltage is K times the nominal voltage. i times.

[0137] For example, such as Figure 12 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a first AC / DC converter 201 and two first DC / DC converters, with first DC / DC converters 202-1 and 202-2 connected in parallel to the output of the first AC / DC converter 201. Each power supply unit includes a second power supply unit 302.

[0138] The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-1 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-1 via the main DC buses 4-1 and 4-2. The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-2 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-2 via the main DC buses 4-3 and 4-4. The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-3 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-3 via the main DC buses 4-5 and 4-6.

[0139] The standard output voltage of power conversion unit 2-1 is twice the nominal voltage. The output voltages of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 of power conversion unit 2-1 are equal to the nominal voltage. The input voltage of the second power supply 302 of power supply unit 3-1 is equal to the nominal voltage. The standard output voltage of power conversion unit 2-2 is twice the nominal voltage. The output voltages of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 of power conversion unit 2-2 are equal to the nominal voltage. The input voltage of the second power supply 302 of power supply unit 3-2 is equal to the nominal voltage. The standard output voltage of power conversion unit 2-3 is twice the nominal voltage. The output voltages of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 of power conversion unit 2-3 are equal to the nominal voltage. The input voltage of the second power supply 302 of power supply unit 3-3 is equal to the nominal voltage.

[0140] Figure 12 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0141] For example, such as Figure 13 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2, which are connected in series. Each power supply unit includes a second power supply unit 302.

[0142] The second AC / DC converter 203-1 and the second AC / DC converter 203-2 of power conversion unit 2-1 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-1 through the main DC bus 4-1. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 of power conversion unit 2-2 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-2 through the main DC buses 4-3 and 4-4. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 of power conversion unit 2-3 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-3 through the main DC buses 4-5 and 4-6.

[0143] The standard output voltage of power conversion unit 2-1 is twice the nominal voltage. The output voltages of the second AC / DC converters 203-1 and 203-2 of power conversion unit 2-1 are equal to the nominal voltage. The input voltage of the second power supply unit 302 of power supply unit 3-1 is equal to the nominal voltage. The standard output voltage of power conversion unit 2-2 is twice the nominal voltage. The output voltages of the second AC / DC converters 203-1 and 203-2 of power conversion unit 2-2 are equal to the nominal voltage. The input voltage of the second power supply unit 302 of power supply unit 3-2 is equal to the nominal voltage. The standard output voltage of power conversion unit 2-3 is twice the nominal voltage. The output voltages of the second AC / DC converters 203-1 and 203-2 of power conversion unit 2-3 are equal to the nominal voltage. The input voltage of the second power supply unit 302 of power supply unit 3-3 is equal to the nominal voltage.

[0144] Figure 13 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0145] Based on the above embodiments, the power conversion unit further includes a first AC / DC converter and a first DC / DC converter, wherein:

[0146] The first AC / DC converter is used to convert the alternating current from the corresponding secondary winding into a second direct current, and the first DC / DC converter is used to convert the second direct current into a first direct current output.

[0147] For example, such as Figure 4 and Figure 8 As shown, each power conversion unit includes a first AC / DC converter 201-1, a first AC / DC converter 201-2, a first DC / DC converter 202-1, and a first DC / DC converter 202-2; the input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2.

[0148] The first AC / DC converter 201-1 of power conversion unit 2-1 converts the alternating current from the secondary winding 101-1 into a second direct current, and the first DC / DC converter 202-1 converts the second direct current into a first direct current output. Similarly, the first AC / DC converter 201-2 of power conversion unit 2-1 converts the alternating current from the secondary winding 101-1 into a second direct current, and the first DC / DC converter 202-2 converts the second direct current into a first direct current output. Likewise, the first AC / DC converter 201-1 of power conversion unit 2-2 converts the alternating current from the secondary winding 101-2 into a second direct current, and the first DC / DC converter 202-1 converts the second direct current into a first direct current output. The first AC / DC converter 201-1 of the power conversion unit 2-3 converts the AC power from the secondary winding 103-1 into the second DC power, and the first DC / DC converter 202-1 converts the second DC power into the first DC power output; the first AC / DC converter 201-2 of the power conversion unit 2-3 converts the AC power from the secondary winding 103-1 into the second DC power, and the first DC / DC converter 202-2 converts the second DC power into the first DC power output.

[0149] For example, such as Figure 10 and Figure 12 As shown, each power conversion unit includes a first AC / DC converter 201 and two first DC / DC converters. First DC / DC converters 202-1 and 202-2 are connected in parallel to the output of the first AC / DC converter 201. In power conversion unit 2-1, the first AC / DC converter 201 converts the AC power from the secondary winding 101-1 into a second DC power. The first DC / DC converters 202-1 and 202-2 convert the second DC power into a first DC power output. Similarly, in power conversion unit 2-2, the first AC / DC converter 201 converts the AC power from the secondary winding 102-1 into a second DC power. The first DC / DC converters 202-1 and 202-2 convert the second DC power into a first DC power output. The first AC / DC converter 201 of the power conversion unit 2-3 converts the AC power from the secondary winding 103-1 into the second DC power, and the first DC / DC converter 202-1 and the first DC / DC converter 202-2 respectively convert the second DC power into the first DC power output.

[0150] Based on the above embodiments, the power conversion module further includes a second AC / DC converter, wherein:

[0151] The second AC / DC converter is used to convert the AC power from the corresponding secondary winding into the first DC power output.

[0152] For example, such as Figure 11 and Figure 13 As shown, the power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Each power conversion unit includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2, which are connected in series.

[0153] The second AC / DC converter 203-1 of power conversion unit 2-1 converts the AC power from the secondary winding 101-1 into a first DC power output; the second AC / DC converter 203-1-2 of power conversion unit 2-1 converts the AC power from the secondary winding 101-2 into a first DC power output. The second AC / DC converter 203-1 of power conversion unit 2-2 converts the AC power from the secondary winding 101-2 into a first DC power output; the second AC / DC converter 203-2 of power conversion unit 2-2 converts the AC power from the secondary winding 101-2 into a first DC power output. The second AC / DC converter 203-1 of power conversion unit 2-3 converts the AC power from the secondary winding 101-3 into a first DC power output; the second AC / DC converter 203-2 of power conversion unit 2-3 converts the AC power from the secondary winding 101-3 into a first DC power output.

[0154] like Figures 14 to 17 As shown, based on the above embodiments, the i-th power conversion unit further includes K. i The first capacitor is connected in series;

[0155] When the power conversion unit includes at least one first AC / DC converter and K i When the first DC / DC converter is used, K i The first capacitor and K i Each of the first DC / DC converters is connected in a one-to-one correspondence, wherein the first capacitor is connected in parallel with the output terminal of the first DC / DC converter;

[0156] When the power conversion unit includes K i When the second AC / DC converter is used, K i The first capacitor and K i Each of the second AC / DC converters is connected in a one-to-one correspondence, with the first capacitor connected in parallel with the output terminal of the second AC / DC converter. The first capacitor serves as a filter and energy storage unit.

[0157] For example, such as Figure 14 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a first AC / DC converter 201 and two first DC / DC converters. First DC / DC converters 202-1 and 202-2 are connected in parallel to the output of first AC / DC converter 201. A first capacitor C1-1 is connected in parallel to the output of first DC / DC converter 202-1, and a first capacitor C1-2 is connected in parallel to the output of first DC / DC converter 202-2. First capacitors C1-1 and C1-2 are connected in series and in parallel to the main DC buses 4-1 and 4-2. Each power supply unit includes a first power supply 301-1 and a first power supply 301-2, which are connected in series.

[0158] The first DC / DC converter 202-1 of power conversion unit 2-1 is connected to the first power supply unit 301-1 of power supply unit 3-1 via the main DC bus 4-1 and the common connection line 5-1; the first DC / DC converter 102-2 of power conversion unit 2-1 is connected to the first power supply unit 301-2 of power supply unit 3-1 via the common connection line 5-1 and the main DC bus 4-2. The first DC / DC converter 202-1 of power conversion unit 2-2 is connected to the first power supply unit 301-1 of power supply unit 3-2 via the main DC bus 4-3 and the common connection line 5-2; the first DC / DC converter 202-2 of power conversion unit 2-2 is connected to the first power supply unit 301-2 of power supply unit 3-2 via the common connection line 5-2 and the main DC bus 4-4. The first DC / DC converter 202-1 of the power conversion unit 2-3 is connected to the first power supply unit 301-1 of the power supply unit 3-3 through the main DC bus 4-5 and the common connection line 5-3; the first DC / DC converter 202-2 of the power conversion unit 2-3 is connected to the first power supply unit 301-2 of the power supply unit 3-3 through the common connection line 5-3 and the main DC bus 4-6.

[0159] Figure 14 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0160] For example, such as Figure 15As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a first AC / DC converter 201 and two first DC / DC converters. First DC / DC converters 202-1 and 202-2 are connected in parallel to the output of first AC / DC converter 201. A first capacitor C1-1 is connected in parallel to the output of first DC / DC converter 202-1, and a first capacitor C1-2 is connected in parallel to the output of first DC / DC converter 202-2. First capacitors C1-1 and C1-2 are connected in series and in parallel to the main DC buses 4-1 and 4-2. Each power supply unit includes a second power supply unit 302.

[0161] The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-1 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-1 via the main DC buses 4-1 and 4-2. The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-2 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-2 via the main DC buses 4-3 and 4-4. The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-3 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-3 via the main DC buses 4-5 and 4-6.

[0162] Figure 15 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0163] For example, such as Figure 16As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2, connected in series. A first capacitor C1-1 is connected in parallel to the output terminal of the second AC / DC converter 203-1, and a first capacitor C1-2 is connected in parallel to the output terminal of the second AC / DC converter 203-2. The first capacitors C1-1 and C1-2 are connected in series and in parallel on the main DC buses 4-1 and 4-2. Each power supply unit includes a first power supply unit 301-1 and a first power supply unit 301-2, connected in series.

[0164] The second AC / DC converter 203-1 of power conversion unit 2-1 is connected to the first power supply unit 301-1 of power supply unit 3-1 via the main DC bus 4-1 and the common connection line 5-1; the second AC / DC converter 203-2 of power conversion unit 2-1 is connected to the first power supply unit 301-2 of power supply unit 3-1 via the common connection line 5-1 and the main DC bus 4-2. The second AC / DC converter 203-1 of power conversion unit 2-2 is connected to the first power supply unit 301-1 of power supply unit 3-2 via the main DC bus 4-3 and the common connection line 5-2; the first and second AC / DC converters 203-2 of power conversion unit 2-2 are connected to the first power supply unit 301-2 of power supply unit 3-2 via the common connection line 5-2 and the main DC bus 4-4. The second AC / DC converter 203-1 of the power conversion unit 2-3 is connected to the first power supply unit 301-1 of the power supply unit 3-3 through the main DC bus 4-5 and the common connection line 5-3; the second AC / DC converter 203-2 of the power conversion unit 2-3 is connected to the first power supply unit 301-2 of the power supply unit 3-3 through the common connection line 5-3 and the main DC bus 4-6.

[0165] Figure 16 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0166] For example, such as Figure 17As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a second AC / DC converter 203-1 and a second AC / DC converter 203-2, which are connected in series. A first capacitor C1-1 is connected in parallel to the output terminal of the second AC / DC converter 203-1, and a first capacitor C1-2 is connected in parallel to the output terminal of the second AC / DC converter 203-2. The first capacitors C1-1 and C1-2 are connected in series and in parallel to the main DC buses 4-1 and 4-2. Each power supply unit includes a second power supply unit 302.

[0167] The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-1 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-1 via the main DC buses 4-1 and 4-2. The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-2 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-2 via the main DC buses 4-3 and 4-4. The first DC / DC converters 202-1 and 102-2 of power conversion unit 2-3 are connected in series and then connected to the second power supply unit 302 of power supply unit 3-3 via the main DC buses 4-5 and 4-6.

[0168] Figure 17 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0169] Based on the above embodiments, the DC power supply system based on Panama power provided in this embodiment of the present invention further includes an energy storage module, which is connected in parallel to the main DC bus.

[0170] For example, such as Figure 18 As shown, the DC power supply system based on the Panama Power Supply includes a phase-shifting transformer 1, a power conversion module 2, and a power supply module 3. One end of the power conversion module 2 is connected to the phase-shifting transformer 1, and the other end of the power conversion module 2 is connected to the power supply module 3. The phase-shifting transformer 1 includes three secondary windings: secondary winding 101-1, secondary winding 101-2, and secondary winding 101-3, each secondary winding having a unique corresponding phase shift angle.

[0171] Power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Power conversion unit 2-1 is connected to power supply unit 3-1 via main DC buses 4-1 and 4-2; energy storage module 6-1 is connected in parallel to main DC buses 4-1 and 4-2. Power conversion unit 2-2 is connected to power supply unit 3-2 via main DC buses 4-3 and 4-4; energy storage module 6-2 is connected in parallel to main DC buses 4-3 and 4-4. Power conversion unit 2-3 is connected to power supply unit 3-3 via main DC buses 4-5 and 4-6; energy storage module 6-3 is connected in parallel to main DC buses 4-5 and 4-6.

[0172] Figure 18 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0173] like Figure 19 As shown, based on the above embodiments, the DC power supply system based on Panama power provided in this utility model embodiment further includes an energy storage module 6, wherein the energy storage module 6 is connected to the power conversion unit 2-1.

[0174] Specifically, each power conversion unit is connected to the energy storage module 6. To address the problem of low battery life caused by directly connecting the energy storage battery in parallel to the main DC bus in existing technologies, this application no longer connects the energy storage module in parallel to the output side of the power conversion unit. Instead, the input of the energy storage module is connected to the rectifier power supply stage. When the power conversion unit supplies power to the power supply module 3, it can simultaneously charge the energy storage module. When the power conversion unit is disconnected or loses power, the energy storage module can supply power to the power supply module 3, ensuring uninterrupted power supply to the power supply module 3. The energy storage module can be a battery or a battery pack, selected according to actual needs; this embodiment of the invention does not limit the choice.

[0175] Because the energy storage module is not connected in parallel to the output side of the power conversion unit, but rather connected to the rectifier power supply stage, the output voltage of the DC power supply system is independent of the energy storage module's voltage. This allows the power conversion unit's output voltage to be set to a fixed value. Since the energy storage module is connected to the power conversion unit but not directly to the load, its charging and discharging are independent of the load. This allows for precise control of the energy storage module's charging and discharging current, effectively controlling its operation so that it only discharges when the power conversion unit is disconnected. This reduces the number of charging and discharging cycles and extends the module's lifespan.

[0176] The output voltage of the DC power supply system is independent of the voltage of energy storage module 6. Its output voltage range can be very small, and a higher voltage can be selected. For example, for a 336V DC power supply system, a higher voltage range of 380-402Vdc can be chosen. Downstream electrical equipment such as power distribution switches, cables, and server power supplies only need to meet this higher voltage range. For the same system power, a higher output voltage results in a lower current, a smaller switch capacity, and thinner cables, which means lower costs and lower losses for the downstream DC power distribution system.

[0177] Furthermore, when a short-circuit fault occurs in the power supply module 3, the energy storage module can provide sufficient short-circuit current through redundancy technology, enabling the faulty power supply module 3 to be disconnected more reliably.

[0178] like Figure 20 As shown, based on the above embodiments, each power conversion unit further includes K. i A second DC / DC converter connected in series;

[0179] When the power conversion unit includes at least one first AC / DC converter and K i When the first DC / DC converter is used, K i The second DC / DC converter and K i Each first DC / DC converter is connected in a one-to-one correspondence, wherein the first end of the second DC / DC converter is connected to the energy storage module, and the second end is connected to the first DC / DC converter;

[0180] When the power conversion unit includes K i When the second AC / DC converter is used, K i The second DC / DC converter and K i Each second AC / DC converter is connected in a one-to-one correspondence, wherein the first end of the second DC / DC converter is connected to the energy storage module, and the second end is connected to the first DC / DC converter.

[0181] For example, such as Figure 20 As shown, power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Power supply module 3 includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power conversion unit includes a first AC / DC converter 201, two first DC / DC converters, and two second DC / DC converters; the first DC / DC converter 202-1 is correspondingly connected to the second DC / DC converter 204-1, and the first DC / DC converter 202-2 is correspondingly connected to the second DC / DC converter 204-2.

[0182] The power conversion unit 2-1 includes a first AC / DC converter 201, a first DC / DC converter 202-1, a first DC / DC converter 202-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the first DC / DC converter 202-1 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-1. The output terminal of the first DC / DC converter 202-2 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-1.

[0183] The power conversion unit 2-2 includes a first AC / DC converter 201, a first DC / DC converter 202-1, a first DC / DC converter 202-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the first DC / DC converter 202-1 of the power conversion unit 2-1 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-2. The output terminal of the first DC / DC converter 202-2 of the power conversion unit 2-1 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-2.

[0184] The power conversion unit 2-3 includes a first AC / DC converter 201, a first DC / DC converter 202-1, a first DC / DC converter 202-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the first DC / DC converter 202-1 of the power conversion unit 2-1 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-3. The output terminal of the first DC / DC converter 202-2 of the power conversion unit 2-1 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-3.

[0185] Figure 20 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0186] For example, such as Figure 21As shown, the power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Each power conversion unit includes two second AC / DC converters and two second DC / DC converters; the second AC / DC converter 203-1 is connected to the second DC / DC converter 204-1, and the second AC / DC converter 203-2 is connected to the second DC / DC converter 204-2.

[0187] The power conversion unit 2-1 includes a second AC / DC converter 203-1, a second AC / DC converter 203-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the second AC / DC converter 203-1 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-1. The output terminal of the second AC / DC converter 203-2 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-1.

[0188] The power conversion unit 2-2 includes a second AC / DC converter 203-1, a second AC / DC converter 203-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the second AC / DC converter 203-1 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-2. The output terminal of the second AC / DC converter 203-2 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-2.

[0189] The power conversion unit 2-3 includes a second AC / DC converter 203-1, a second AC / DC converter 203-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the second AC / DC converter 203-1 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-3. The output terminal of the second AC / DC converter 203-2 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-3.

[0190] Figure 21For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0191] Based on the above embodiments, the power conversion unit further includes K i A second capacitor connected in series;

[0192] K i The second capacitor and K i Each second DC / DC converter is connected in a one-to-one correspondence, with the second capacitor connected in parallel with the second terminal of the second DC / DC converter. The second capacitor serves as a filter and energy storage device.

[0193] For example, such as Figure 22 As shown, the power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Each power conversion unit includes a first AC / DC converter 201, two first DC / DC converters, and two second DC / DC converters; the first DC / DC converters 202-1 and 204-1 are connected to each other, and the first DC / DC converters 202-2 and 204-2 are connected to each other.

[0194] The power conversion unit 2-1 includes a first AC / DC converter 201, a first DC / DC converter 202-1, a first DC / DC converter 202-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the first DC / DC converter 202-1 is connected to the second terminal of the second DC / DC converter 204-1. The first terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-1, and a second capacitor C2-1 is connected in parallel to the second terminal of the second DC / DC converter 204-1. Similarly, the output terminal of the first DC / DC converter 202-2 is connected to the second terminal of the second DC / DC converter 204-2. The first terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-1, and a second capacitor C2-2 is connected in parallel to the second terminal of the second DC / DC converter 204-2. The second capacitors C2-1 and C2-2 are connected in series. The second capacitor C2-1 and the second capacitor C2-2 are connected in series and then in parallel with the main DC bus 4-1 and 4-2. The connection line between the second capacitor C2-1 and the second capacitor C2-2 is connected to the common connection line 5-1.

[0195] Power conversion unit 2-2 includes a first AC / DC converter 201, a first DC / DC converter 202-1, a first DC / DC converter 202-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the first DC / DC converter 202-1 is connected to the second terminal of the second DC / DC converter 204-1. The first terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-2. A second capacitor C2-1 is connected in parallel to the second terminal of the second DC / DC converter 204-1. The output terminal of the first DC / DC converter 202-2 is connected to the second terminal of the second DC / DC converter 204-2. The first terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-2. A second capacitor C2-2 is connected in parallel to the second terminal of the second DC / DC converter 204-2. The second capacitor C2-1 and the second capacitor C2-2 are connected in series. The second capacitor C2-1 and the second capacitor C2-2 are connected in series and then in parallel with the main DC bus 4-3 and 4-4. The connection line between the second capacitor C2-1 and the second capacitor C2-2 is connected to the common connection line 5-2.

[0196] The power conversion unit 2-3 includes a first AC / DC converter 201, a first DC / DC converter 202-1, a first DC / DC converter 202-2, a second DC / DC converter 204-1, and a second DC / DC converter 204-2. The output terminal of the first DC / DC converter 202-1 is connected to the second terminal of the second DC / DC converter 204-1. The first terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-3. A second capacitor C2-1 is connected in parallel to the second terminal of the second DC / DC converter 204-1. The output terminal of the first DC / DC converter 202-2 is connected to the second terminal of the second DC / DC converter 204-2. The first terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-3. A second capacitor C2-2 is connected in parallel to the second terminal of the second DC / DC converter 204-2. The second capacitors C2-1 and C2-2 are connected in series. The second capacitor C2-1 and the second capacitor C2-2 are connected in series and then in parallel with the main DC bus 4-5 and 4-6. The connection line between the second capacitor C2-1 and the second capacitor C2-2 is connected to the common connection line 5-3.

[0197] Figure 22 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0198] Based on the above embodiments, each secondary winding further includes n sub-windings, where n is greater than or equal to 2, wherein:

[0199] When the power conversion unit includes the first AC / DC converter and K i When there are n first DC / DC converters connected in series, the number of first AC / DC converters is greater than or equal to n, wherein each sub-winding is connected to at least one first AC / DC converter, and each first AC / DC converter is connected to at least one first DC / DC converter. i The first DC / DC converters are connected in series and then connected to the power supply unit via the main DC bus;

[0200] When the power conversion unit includes K i When there are two second AC / DC converters connected in series, where each sub-winding is connected to at least one second AC / DC converter, K i The second AC / DC converters are connected in series and then connected to the power supply unit via the main DC bus. Since each secondary winding has a unique corresponding phase shift angle, the phase shift angles of the sub-windings included in each secondary winding are the same.

[0201] For example, such as Figure 23 As shown, the phase-shifting transformer 1 includes three secondary windings, each secondary winding including two sub-windings, with the two sub-windings corresponding to the same phase shift angle. The power conversion module 2 includes power conversion units 2-1, 2-2, and 2-3. Each power conversion unit includes a first AC / DC converter 201, a first AC / DC converter 202, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The power supply module includes power supply units 3-1, 3-2, and 3-3.

[0202] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of one sub-winding of the secondary winding 101-1 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-1. The output terminal of the other sub-winding of the secondary winding 101-1 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-1. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. After the first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series, they are connected to the power supply unit 3-1 through the main DC bus 4-1 and 4-2.

[0203] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of one sub-winding of the secondary winding 101-2 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-2. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-2. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. After the first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series, they are connected to the power supply unit 3-2 through the main DC bus 4-3 and 4-4.

[0204] The output terminal of the secondary winding 101-3 is connected to the input terminal of the power conversion unit 2-3. The output terminal of one sub-winding of the secondary winding 101-3 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-3. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-3. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series to the power supply unit 3-3 through the main DC bus 4-5 and 4-6.

[0205] Figure 23 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0206] For example, such as Figure 24As shown, the phase-shifting transformer 1 includes three secondary windings, each secondary winding including two sub-windings, with the two sub-windings corresponding to the same phase shift angle. The power conversion module 2 includes power conversion units 2-1, 2-2, and 2-3. Each power conversion unit includes a first AC / DC converter 201, a first AC / DC converter 202, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The power supply module includes power supply units 3-1, 3-2, and 3-3. Each power supply unit includes a first power supply unit 301-1 and a first power supply unit 301-2, which are connected in series.

[0207] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of one sub-winding of the secondary winding 101-1 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-1. The output terminal of the other sub-winding of the secondary winding 101-1 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-1. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. The first DC / DC converter 202-1 of the power conversion unit 2-1 is connected to the first power supply unit 301-1 of the power supply unit 3-1 through the main DC bus 4-1 and the common connection line 5-1; the first DC / DC converter 202-2 of the power conversion unit 2-1 is connected to the first power supply unit 301-2 of the power supply unit 3-1 through the common connection line 5-1 and the main DC bus 4-2.

[0208] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of one sub-winding of the secondary winding 101-2 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-2. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-2. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. The first DC / DC converter 202-1 of the power conversion unit 2-2 is connected to the first power supply unit 301-1 of the power supply unit 3-2 through the main DC bus 4-3 and the common connection line 5-2; the first DC / DC converter 202-2 of the power conversion unit 2-2 is connected to the first power supply unit 301-2 of the power supply unit 3-2 through the common connection line 5-2 and the main DC bus 4-4.

[0209] The output terminal of the secondary winding 101-3 is connected to the input terminal of the power conversion unit 2-3. The output terminal of one sub-winding of the secondary winding 101-3 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-3. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-3. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. The first DC / DC converter 202-1 of the power conversion unit 2-3 is connected to the first power supply unit 301-1 of the power supply unit 3-3 through the main DC bus 4-5 and the common connection line 5-3; the first DC / DC converter 202-2 of the power conversion unit 2-3 is connected to the first power supply unit 301-2 of the power supply unit 3-3 through the common connection line 5-3 and the main DC bus 4-6.

[0210] Figure 24 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0211] For example, such as Figure 25As shown, the phase-shifting transformer 1 includes three secondary windings, each secondary winding including two sub-windings, with the two sub-windings corresponding to the same phase shift angle. The power conversion module 2 includes power conversion units 2-1, 2-2, and 2-3. Each power conversion unit includes a first AC / DC converter 201, a first AC / DC converter 202, a first DC / DC converter 202-1, and a first DC / DC converter 202-2. The input terminal of the first DC / DC converter 202-1 is connected to the output terminal of the first AC / DC converter 201-1, and the input terminal of the first DC / DC converter 202-2 is connected to the output terminal of the first AC / DC converter 201-2. The power supply module includes power supply units 3-1, 3-2, and 3-3. Each power supply unit includes a second power supply unit 302.

[0212] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of one sub-winding of the secondary winding 101-1 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-1. The output terminal of the other sub-winding of the secondary winding 101-1 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-1. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. After the first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series, they are connected to the second power supply 302 through the main DC bus 4-1 and 4-2.

[0213] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of one sub-winding of the secondary winding 101-2 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-2. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-2. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series and then connected to the second power supply 302 through the main DC bus 4-3 and 4-4.

[0214] The output terminal of the secondary winding 101-3 is connected to the input terminal of the power conversion unit 2-3. The output terminal of one sub-winding of the secondary winding 101-3 is connected to the input terminal of one first AC / DC converter 201-1 of the power conversion unit 2-3. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of another first AC / DC converter 201-2 of the power conversion unit 2-3. The first AC / DC converter 201-1 is connected in series with the first DC / DC converter 202-1, and the first AC / DC converter 201-2 is connected in series with the first DC / DC converter 202-2. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series to the second power supply 302 through the main DC bus 4-5 and 4-6.

[0215] Figure 25 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0216] For example, such as Figure 26 As shown, the phase-shifting transformer 1 includes three secondary windings, each secondary winding including two sub-windings, with the two sub-windings corresponding to the same phase shift angle. The power conversion module 2 includes power conversion units 2-1, 2-2, and 2-3. Each power conversion unit includes two second AC / DC converters. The power supply module includes power supply units 3-1, 3-2, and 3-3.

[0217] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of one sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-1. The output terminal of the other sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-1. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the power supply unit 3-1 through the main DC bus 4-1 and 4-2.

[0218] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of one sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-2. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-2. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the power supply unit 3-2 through the main DC bus 4-3 and 4-4.

[0219] The output terminal of the secondary winding 101-3 is connected to the input terminal of the power conversion unit 2-3. The output terminal of one sub-winding of the secondary winding 101-3 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-3. The output terminal of the other sub-winding of the secondary winding 101-3 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-3. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the power supply unit 3-3 through the main DC bus 4-5 and 4-6.

[0220] Figure 26 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0221] For example, such as Figure 27 As shown, the phase-shifting transformer 1 includes three secondary windings, each secondary winding including two sub-windings, with the two sub-windings corresponding to the same phase shift angle. The power conversion module 2 includes power conversion units 2-1, 2-2, and 2-3. Each power conversion unit includes two second AC / DC converters. The power supply module includes power supply units 3-1, 3-2, and 3-3. Each power supply unit includes a first power supply unit 301-1 and a first power supply unit 301-2, which are connected in series.

[0222] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of one sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-1. The output terminal of the other sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-1. The first DC / DC converter 202-1 of the power conversion unit 2-1 is connected to the first power supply unit 301-1 of the power supply unit 3-1 through the main DC bus 4-1 and the common connection line 5-1. The first DC / DC converter 202-2 of the power conversion unit 2-1 is connected to the first power supply unit 301-2 of the power supply unit 3-1 through the common connection line 5-1 and the main DC bus 4-2.

[0223] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of one sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-2. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-2. The first DC / DC converter 202-1 of the power conversion unit 2-2 is connected to the main DC bus 4-3 and the main DC bus 4-2. The common connection line 5-2 is connected to the first power supply 301-1 of the power supply unit 3-2; the first DC / DC converter 202-1 of the power conversion unit 2-3 is connected to the first power supply 301-1 of the power supply unit 3-3 through the main DC bus 4-5 and the common connection line 5-3; the first DC / DC converter 202-2 of the power conversion unit 2-3 is connected to the first power supply 301-2 of the power supply unit 3-3 through the common connection line 5-3 and the main DC bus 4-6.

[0224] The output terminal of the secondary winding 101-3 is connected to the input terminal of the power conversion unit 2-3. The output terminal of one sub-winding of the secondary winding 101-3 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-3. The output terminal of the other sub-winding of the secondary winding 101-3 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-3. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the power supply unit 3-3 through the main DC bus 4-5 and 4-6.

[0225] Figure 27 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0226] For example, such as Figure 28 As shown, the phase-shifting transformer 1 includes three secondary windings, each secondary winding including two sub-windings, with the two sub-windings corresponding to the same phase shift angle. The power conversion module 2 includes power conversion units 2-1, 2-2, and 2-3. Each power conversion unit includes two second AC / DC converters. The power supply module includes power supply units 3-1, 3-2, and 3-3. Each power supply unit includes a second power supply unit 302.

[0227] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of one sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-1. The output terminal of the other sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-1. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the second power supply 302 through the main DC bus 4-1 and 4-2.

[0228] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of one sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-2. The output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-2. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the second power supply 302 through the main DC bus 4-3 and 4-4.

[0229] The output terminal of the secondary winding 101-3 is connected to the input terminal of the power conversion unit 2-3. The output terminal of one sub-winding of the secondary winding 101-3 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-3. The output terminal of the other sub-winding of the secondary winding 101-3 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-3. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series and then connected to the second power supply 302 through the main DC bus 4-5 and 4-6.

[0230] Figure 28 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0231] For example, such as Figure 29 As shown, the phase-shifting transformer 1 includes three secondary windings, each secondary winding including two sub-windings, with the two sub-windings corresponding to the same phase shift angle. The power conversion module 2 includes power conversion units 2-1, 2-2, and 2-3. Each power conversion unit includes two first AC / DC converters and four first DC / DC converters, with the four first DC / DC converters connected in series. The power supply module includes power supply units 3-1, 3-2, and 3-3. Each power supply unit includes four first power supplies, with the four first power supplies connected in series.

[0232] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of the sub-winding 1011-1 of the secondary winding 101-1 is connected to the input terminal of a first AC / DC converter 201-1 of the power conversion unit 2-1. The output terminal of the sub-winding 1011-2 of the secondary winding 101-1 is connected to the input terminal of the first AC / DC converter 201-2 of the power conversion unit 2-1. First DC / DC converters 202-1 and 202-2 are connected in parallel at the output terminal of the first AC / DC converter 201-1. First DC / DC converters 202-3 and 202-4 are connected in parallel at the output terminal of the first AC / DC converter 201-2. A first capacitor C1-1 is connected in parallel at the output terminal of the first DC / DC converter 202-1. A first capacitor C1-2 is connected in parallel at the output terminal of the first DC / DC converter 202-2. A second capacitor C2-1 is connected in parallel to the output terminal of power converter 3, and a second capacitor C2-2 is connected in parallel to the output terminal of the first DC / DC converter 202-4; the first DC / DC converter 202-1 of power conversion unit 2-1 is connected to the first power supply unit 301-1 of power supply unit 3-1 through the main DC bus 4-1 and the common connection line 5-1; the first DC / DC converter 202-2 of power conversion unit 2-1 is connected to the first power supply unit 301-2 of power supply unit 3-1 through the common connection line 5-1 and the common connection line 5-2; the first DC / DC converter 202-3 of power conversion unit 2-1 is connected to the first power supply unit 301-3 of power supply unit 3-1 through the common connection line 5-2 and the common connection line 5-3; the first DC / DC converter 202-4 of power conversion unit 2-1 is connected to the first power supply unit 301-4 of power supply unit 3-1 through the common connection line 5-3 and the main DC bus 4-2.

[0233] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of the sub-winding 1012-1 of the secondary winding 101-2 is connected to the input terminal of a first AC / DC converter 201-1 of the power conversion unit 2-2. The output terminal of the sub-winding 1012-2 of the secondary winding 101-2 is connected to the input terminal of the first AC / DC converter 201-2 of the power conversion unit 2-2. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output terminal of the first AC / DC converter 201-1. The first DC / DC converters 202-3 and 202-4 are connected in parallel to the output terminal of the first AC / DC converter 201-2. The first capacitor C1-1 is connected in parallel to the output terminal of the first DC / DC converter 202-1. The first capacitor C1-2 is connected in parallel to the output terminal of the first DC / DC converter 202-2. A second capacitor C2-1 is connected in parallel to the output terminal of power conversion unit 3, and a second capacitor C2-2 is connected in parallel to the output terminal of the first DC / DC converter 202-4; the first DC / DC converter 202-1 of power conversion unit 2-2 is connected to the first power supply unit 301-1 of power supply unit 3-2 through the main DC bus 4-3 and the common connection line 5-4; the first DC / DC converter 202-2 of power conversion unit 2-2 is connected to the first power supply unit 301-2 of power supply unit 3-2 through the common connection line 5-4 and the common connection line 5-5; the first DC / DC converter 202-3 of power conversion unit 2-2 is connected to the first power supply unit 301-3 of power supply unit 3-2 through the common connection line 5-5 and the common connection line 5-6; the first DC / DC converter 202-4 of power conversion unit 2-2 is connected to the first power supply unit 301-4 of power supply unit 3-2 through the common connection line 5-6 and the main DC bus 4-4.

[0234] Figure 29 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0235] For example, such as Figure 30 As shown, the phase-shifting transformer 1 includes three secondary windings, each secondary winding including two sub-windings, with the two sub-windings corresponding to the same phase shift angle. The power conversion module 2 includes power conversion units 2-1, 2-2, and 2-3. Each power conversion unit includes two first AC / DC converters and four first DC / DC converters, with the four first DC / DC converters connected in series. The power supply module includes power supply units 3-1, 3-2, and 3-3. Each power supply unit includes a second power supply unit 302.

[0236] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of the sub-winding 1011-1 of the secondary winding 101-1 is connected to the input terminal of the first AC / DC converter 201-1 of the power conversion unit 2-1. The output terminal of the sub-winding 1011-2 of the secondary winding 101-1 is connected to the input terminal of the first AC / DC converter 201-2 of the power conversion unit 2-1. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output terminal of the first AC / DC converter 201-1. The first DC / DC converters 202-3 and 202-4 are connected in parallel to the first AC / DC converter 201-1. The output terminals of 1-2; the output terminals of the first DC / DC converter 202-1 are connected in parallel with the first capacitor C1-1, the output terminals of the first DC / DC converter 202-2 are connected in parallel with the first capacitor C1-2, the output terminals of the first DC / DC converter 202-3 are connected in parallel with the second capacitor C2-1, and the output terminals of the first DC / DC converter 202-4 are connected in parallel with the second capacitor C2-2; the first DC / DC converters 202-1, 202-2, 202-3, and 202-4 of the power conversion unit 2-1 are connected in series and then connected to the second power supply unit 302 of the power supply unit 3-1 through the main DC bus 4-1 and 4-2.

[0237] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of the sub-winding 1012-1 of the secondary winding 101-2 is connected to the input terminal of a first AC / DC converter 201-1 of the power conversion unit 2-2. The output terminal of the sub-winding 1012-2 of the secondary winding 101-2 is also connected to the input terminal of the first AC / DC converter 201-2 of the power conversion unit 2-2. The first DC / DC converters 202-1 and 202-2 are connected in parallel to the output terminal of the first AC / DC converter 201-1. The first DC / DC converters 202-3 and 202-4 are connected in parallel to the first AC / DC converter 201-1. The output terminals of 01-2; the output terminals of the first DC / DC converter 202-1 are connected in parallel with the first capacitor C1-1, the output terminals of the first DC / DC converter 202-2 are connected in parallel with the first capacitor C1-2, the output terminals of the first DC / DC converter 202-3 are connected in parallel with the second capacitor C2-1, and the output terminals of the first DC / DC converter 202-4 are connected in parallel with the second capacitor C2-2; the first DC / DC converters 202-1, 202-2, 202-3, and 202-4 of the power conversion unit 2-2 are connected in series and then connected to the second power supply unit 302 of the power supply unit 3-2 through the main DC bus 4-3 and 4-4.

[0238] Figure 30 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0239] For example, such as Figure 31 As shown, each secondary winding includes two sub-windings, with the two sub-windings corresponding to the same phase shift angle. Power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Each power conversion unit includes two second AC / DC converters and two second DC / DC converters; second AC / DC converter 203-1 is connected to second DC / DC converter 204-1, and second AC / DC converter 203-2 is connected to second DC / DC converter 204-2. Power supply module includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power supply unit includes a first power supply unit 301-1 and a first power supply unit 301-2, which are connected in series.

[0240] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of one sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-1, and the output terminal of the other sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-1. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 are connected in series. The second AC / DC converter 203-1 of the power conversion unit 2-1 is connected to the first power supply unit 301-1 of the power supply unit 3-1 through the main DC bus 4-1 and the common connection line 5-1. The second AC / DC converter 203-2 of the power conversion unit 2-1 is connected to the first power supply unit 301-2 of the power supply unit 3-1 through the common connection line 5-1 and the main DC bus 4-2. The output terminal of the second AC / DC converter 203-1 of the power conversion unit 2-1 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-1. The output terminal of the second AC / DC converter 203-2 of the power conversion unit 2-1 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-1.

[0241] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of one sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-2, and the output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-2. The second AC / DC converter 203-1 of the power conversion unit 2-2 is connected to the first power supply unit 301-1 of the power supply unit 3-2 through the main DC bus 4-3 and the common connection line 5-2. The second AC / DC converter 203-2 of the power conversion unit 2-2 is connected to the first power supply unit 301-2 of the power supply unit 3-2 through the common connection line 5-2 and the main DC bus 4-4. The output terminal of the second AC / DC converter 203-1 of the power conversion unit 2-2 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-2. The output terminal of the second AC / DC converter 203-2 of the power conversion unit 2-2 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-2.

[0242] Figure 31 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0243] For example, such as Figure 32 As shown, each secondary winding includes two sub-windings, with the two sub-windings corresponding to the same phase shift angle. Power conversion module 2 includes power conversion unit 2-1, power conversion unit 2-2, and power conversion unit 2-3. Each power conversion unit includes two second AC / DC converters and two second DC / DC converters; second AC / DC converter 203-1 is connected to second DC / DC converter 204-1, and second AC / DC converter 203-2 is connected to second DC / DC converter 204-2. Power supply module includes power supply unit 3-1, power supply unit 3-2, and power supply unit 3-3. Each power supply unit includes a second power supply unit 302.

[0244] The output terminal of the secondary winding 101-1 is connected to the input terminal of the power conversion unit 2-1. The output terminal of one sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-1, and the output terminal of the other sub-winding of the secondary winding 101-1 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-1. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 of the power conversion unit 2-1 are connected in series. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 of the power conversion unit 2-1 are connected to the second power supply unit 302 of the power supply unit 3-1 through the main DC bus 4-1 and 4-2. The output terminal of the second AC / DC converter 203-1 of the power conversion unit 2-1 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-1. The output terminal of the second AC / DC converter 203-2 of the power conversion unit 2-1 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-1.

[0245] The output terminal of the secondary winding 101-2 is connected to the input terminal of the power conversion unit 2-2. The output terminal of one sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-1 of the power conversion unit 2-2, and the output terminal of the other sub-winding of the secondary winding 101-2 is connected to the input terminal of the second AC / DC converter 203-2 of the power conversion unit 2-2. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 of the power conversion unit 2-2 are connected in series. The second AC / DC converter 203-1 and the second AC / DC converter 203-2 of the power conversion unit 2-2 are connected to the second power supply unit 302 of the power supply unit 3-1 through the main DC bus 4-3 and 4-4. The output terminal of the second AC / DC converter 203-1 of the power conversion unit 2-2 is connected to the first terminal of the second DC / DC converter 204-1, and the second terminal of the second DC / DC converter 204-1 is connected to the energy storage module 6-2. The output terminal of the second AC / DC converter 203-2 of the power conversion unit 2-2 is connected to the first terminal of the second DC / DC converter 204-2, and the second terminal of the second DC / DC converter 204-2 is connected to the energy storage module 6-2.

[0246] Figure 32 For structures and / or connections not described herein, please refer to the relevant embodiments above, which will not be repeated here.

[0247] In the description of this specification, the references to terms such as "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0248] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A DC power supply system based on Panamax power, characterized in that, It includes a phase-shifting transformer, a power conversion module, and a power supply module: one end of the power conversion module is connected to the phase-shifting transformer, and the other end is connected to the power supply module; The phase-shifting transformer includes N secondary windings, each of which has a unique corresponding phase-shifting angle, where N is a positive integer greater than or equal to 2. The power conversion module includes multiple power conversion units, the number of which is equal to the number of secondary windings; the power supply module includes at least one power supply unit. N secondary windings are connected one-to-one with N power conversion units; each power supply unit is connected to at least one power conversion unit via a total DC bus. Each of the power conversion units includes a first AC / DC converter and a first DC / DC converter, or includes a second AC / DC conversion unit; When the power conversion unit includes the first AC / DC converter and the first DC / DC converter: the number of the first AC / DC converter is greater than or equal to 1, and the number of the first DC / DC converter is K. i Each of the first AC / DC converters is connected to the corresponding secondary winding, and each of the first AC / DC converters is also connected to at least one of the first DC / DC converters, K i Each of the first DC / DC converters is connected in series to the power supply unit via the total DC bus, and the output voltage of a single first DC / DC converter is the nominal voltage; when the power conversion unit includes the second AC / DC converter, the number of the second AC / DC converters is K. i Each of the second AC / DC converters is connected to the corresponding secondary winding, K i Each of the second AC / DC converters is connected in series and then connected to the power supply unit via the total DC bus. The output voltage of a single second AC / DC converter is the nominal voltage; where K i is a positive integer greater than or equal to 2, and i is a positive integer less than or equal to N; The voltage of the total DC bus is equal to the output voltage of the power conversion unit, wherein the standard output voltage of the power conversion unit is K times the nominal voltage. i times.

2. The DC power supply system based on the Panama Power Supply according to claim 1, characterized in that, Each of the power supply units includes K i A first power supply unit, wherein: K in each of the power supply units i The first power supply is connected in series, and two adjacent first power supplies share a common connection line. One end of the common connection line is connected to the midpoint of the connection between two adjacent and series-connected first power supplies. When the power conversion unit connected to the power supply unit includes at least one first AC / DC converter and K i When there is a first DC / DC converter, the other end of the common connection line is connected to the midpoint of the connection between two adjacent first DC / DC converters; when the power conversion unit connected to the power supply unit includes K i When there is a second AC / DC converter, the other end of the common connection line is connected to the midpoint of the connection between two adjacent second AC / DC converters; Each of the power supply units includes K i -1 of the aforementioned common connection lines; The input voltage of each of the first power supplies is the nominal voltage.

3. The DC power supply system based on the Panama Power Supply according to claim 1, characterized in that, Each of the power supply units includes one second power supply unit; When the power conversion unit connected to the power supply unit includes at least one first AC / DC converter and K i When the first DC / DC converter is used, K i The first DC / DC converters are connected in series and then connected to the second power supply via the main DC bus; When the power conversion unit connected to the power supply unit includes K i When the second AC / DC converter is used, K i The AC / DC converters are connected in series and then connected to the second power supply via the main DC bus. The input voltage of each of the second power supplies is K of the nominal voltage. i times.

4. The DC power supply system based on the Panama Power Supply according to claim 1, characterized in that, The power conversion unit includes the first AC / DC converter and the first DC / DC converter, wherein: The first AC / DC converter is used to convert the alternating current from the corresponding secondary winding into a second direct current, and the first DC / DC converter is used to convert the second direct current into a first direct current output.

5. The DC power supply system based on the Panama Power Supply according to claim 1, characterized in that, The power conversion module includes the second AC / DC converter, wherein: The second AC / DC converter is used to convert the alternating current from the corresponding secondary winding into a first direct current output.

6. The DC power supply system based on the Panama Power Source according to claim 1, characterized in that, The i-th power conversion unit also includes K i The first capacitor is connected in series; When the power conversion unit includes at least one of the first AC / DC converters and K i When the first DC / DC converter is used, K i The first capacitor and K i Each of the first DC / DC converters is connected in a one-to-one correspondence, wherein the first capacitor is connected in parallel with the output terminal of the first DC / DC converter; When the power conversion unit includes K i When the second AC / DC converter is used, K i The first capacitor and K i Each of the second AC / DC converters is connected in a one-to-one correspondence, wherein the first capacitor is connected in parallel with the output terminal of the second AC / DC converter.

7. The DC power supply system based on the Panama Power Supply according to claim 1, characterized in that, It also includes an energy storage module, wherein the energy storage module is connected to the power conversion unit.

8. The DC power supply system based on the Panama Power Supply according to claim 7, characterized in that, Each of the power conversion units also includes K i A second DC / DC converter connected in series; When the power conversion unit includes at least one of the first AC / DC converters and K i When the first DC / DC converter is used, K i The second DC / DC converter and K i Each of the first DC / DC converters is connected in a one-to-one correspondence, wherein the first end of the second DC / DC converter is connected to the energy storage module, and the second end is connected to the first DC / DC converter; When the power conversion unit includes K i When the second AC / DC converter is used, K i The second DC / DC converter and K i Each of the second AC / DC converters is connected in a one-to-one correspondence, wherein the first end of the second DC / DC converter is connected to the energy storage module, and the second end is connected to the first DC / DC converter.

9. The DC power supply system based on the Panama Power Supply according to claim 8, characterized in that, The power conversion unit also includes K i A second capacitor connected in series; K i The second capacitor and K i Each of the second DC / DC converters is connected in a one-to-one correspondence, wherein the second capacitor is connected in parallel with the second terminal of the second DC / DC converter.

10. The DC power supply system based on the Panama Power Supply according to claim 1, characterized in that, Each of the secondary windings comprises n sub-windings, where n is greater than or equal to 2, wherein: When the power conversion unit includes the first AC / DC converter and K i When the first DC / DC converters are connected in series, the number of the first AC / DC converters is greater than or equal to n, wherein each sub-winding is connected to at least one first AC / DC converter, and each first AC / DC converter is connected to at least one first DC / DC converter. i The first DC / DC converters are connected in series and then connected to the power supply unit through the main DC bus; When the power conversion unit includes K i When the second AC / DC converters are connected in series, wherein each of the sub-windings is connected to at least one of the second AC / DC converters, K i The second AC / DC converters are connected in series and then connected to the power supply unit via the main DC bus.

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