Direct current power supply system based on Panama power supply

Abstract

The invention provides a DC power supply system based on a Panama power supply. The DC power supply system comprises a phase-shifting transformer, a power conversion module and a power supply module. The power conversion module is connected with the phase-shifting transformer and the power supply module. The phase-shifting transformer comprises N secondary windings, and each secondary winding has a unique corresponding phase-shifting angle; the power conversion module comprises a plurality of power conversion units, and the number of the power conversion units is equal to that of the secondary windings; the power supply module comprises a power supply unit; the N secondary windings are connected with the N power conversion units in a one-to-one correspondence manner; each power supply unit is correspondingly connected with the power conversion unit through a main direct-current bus; each power conversion unit comprises a first AC / DC converter and a first DC / DC converter, or comprises a second AC / DC conversion unit; the voltage of the total direct current bus is equal to the output voltage of the power conversion unit, and the standard output voltage of the power conversion unit is Ki times of the nominal voltage. The direct-current power supply cost can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply equipment, in particular to a direct current power supply system based on Panama power supply. BACKGROUND

[0002] With the development of Internet communication technology, the construction and operation of data centers have become normalized. The power supply system of the data center is a key infrastructure of the data center, which can provide uninterrupted power supply for the data center to ensure the normal operation of the data center equipment.

[0003] To realize the high reliability and high efficiency of the operation of the data center, major Internet companies are researching and exploring power supply and distribution modes suitable for themselves. Among various power supply schemes, the Panama power supply scheme has the advantages of less land occupation, simple architecture, high reliability, etc. compared with the traditional power supply scheme, and is favored by major Internet companies. The output DC bus voltage of the Panama power supply scheme is usually selected based on the voltage range provided by the industry standard of data center DC power supply. However, in order to meet the working voltage requirements of the downstream power distribution switch, cable, server power supply, etc., the working voltage needs to be selected according to the lowest working voltage. For the same system power, the lower the output side voltage, the greater the current, the greater the switch capacity, and the thicker the cable, that is, the higher the cost of the downstream DC power distribution system. At the same time, the larger bus current also increases the cable power consumption, causing energy waste. Therefore, how to reduce the power supply cost has become an important topic to be solved in the field. SUMMARY

[0004] In view of the problems in the prior art, the embodiment of the present application provides a direct current power supply system based on Panama power supply, which can at least partially solve the problems in the prior art.

[0005] The direct current power supply system based on Panama power supply provided by the embodiment of the present application comprises a phase-shifting transformer, a power conversion module and a power supply module: one end of the power conversion module is connected with the phase-shifting transformer, and the other end is connected with the power supply module;

[0006] The phase-shifting transformer comprises N secondary side windings, each secondary side winding has a unique phase-shifting angle, and N is a positive integer greater than or equal to 2;

[0007] The power conversion module comprises a plurality of power conversion units, the number of the power conversion units is equal to the number of the secondary side windings; and the power supply module comprises at least one power supply unit;

[0008] The N secondary side windings are connected with the N power conversion units one by one; and each power supply unit is connected with at least one power conversion unit through a total DC bus;

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

[0010] When the power conversion unit comprises the first AC / DC converter and the first DC / DC converter, the number of the first AC / DC converters is greater than or equal to 1, and the number of the first DC / DC converters is K i Each first AC / DC converter is connected to a corresponding secondary winding, and each first AC / DC converter is further connected to at least one first DC / DC converter, K i first DC / DC converters are connected in series and connected to the power supply unit through a total DC bus, and the output voltage of a single first DC / DC converter is a nominal voltage; when the power conversion unit comprises the second AC / DC converter, the number of the second AC / DC converters is K i Each second AC / DC converter is connected to a corresponding secondary winding, K i second AC / DC converters are connected in series and connected to the power supply unit through a total DC bus, and the output voltage of a single second AC / DC converter is a nominal voltage; wherein 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, wherein the standard output voltage of the power conversion unit is K i times the nominal voltage.

[0012] Further, each power supply unit comprises K i first power supply units, wherein:

[0013] The K i first power supply units in each power supply unit are connected in series, and two adjacent first power supply units share a common connection line, one end of the common connection line being connected to the connection midpoint of the two adjacent and connected first power supply units;

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

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

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

[0017] Further, each power supply unit comprises one second power supply;

[0018] When the power conversion unit connected with the power supply unit comprises at least one first AC / DC converter and K i first DC / DC converters, the K i first DC / DC converters are connected in series and then connected with the second power supply through the total DC bus;

[0019] When the power conversion unit connected with the power supply unit comprises K i second AC / DC converters, the K i AC / DC converters are connected in series and then connected with the second power supply through the total DC bus;

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

[0021] Further, the power conversion unit comprises the first AC / DC converter and the first DC / DC converter, wherein:

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

[0023] Further, the power conversion module comprises the second AC / DC converter, wherein:

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

[0025] Further, the i-th power conversion unit further comprises K i first capacitors connected in series;

[0026] When the power conversion unit comprises at least one first AC / DC converter and K i first DC / DC converters, the K i first capacitors are connected with the K i first DC / DC converters one by one, wherein the first capacitor is connected in parallel with the output terminal of the first DC / DC converter;

[0027] When the power conversion unit comprises K i second AC / DC converters, the K i first capacitors are connected with the K iThe first AC / DC converter is connected with the first DC / DC converter in one-to-one correspondence.

[0028] Further, the DC power supply system based on the Panama power source further comprises an energy storage module, wherein the energy storage module is connected with the power conversion unit.

[0029] Further, each power conversion unit block further comprises K i second DC / DC converters in series;

[0030] When the power conversion unit comprises at least one first AC / DC converter and K i second DC / DC converters in series, the number of the first AC / DC converters is greater than or equal to n, wherein each sub-winding is connected with at least one first AC / DC converter in one-to-one correspondence, each first AC / DC converter is connected with at least one first DC / DC converter, and the K i second DC / DC converters are connected with the K i first DC / DC converters in one-to-one correspondence.

[0031] When the power conversion unit comprises K i second AC / DC converters, the K i second DC / DC converters are connected with the K i second AC / DC converters in one-to-one correspondence.

[0032] Further, the power conversion unit further comprises K i second capacitors in series;

[0033] The K i second capacitors are connected with the K i second DC / DC converters in one-to-one correspondence.

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

[0035] When the power conversion unit comprises first AC / DC converters and K i first DC / DC converters in series, the number of the first AC / DC converters is greater than or equal to n, wherein each sub-winding is connected with at least one first AC / DC converter in one-to-one correspondence, each first AC / DC converter is connected with at least one first DC / DC converter, and the K i first DC / DC converters are connected with the power supply unit through the total DC bus after being connected in series.

[0036] When the power conversion unit comprises K iK i second AC / DC converters are connected in series and connected to the power supply unit through the total DC bus.

[0037] The DC power supply system based on the Panama power supply provided by the embodiment of the application comprises 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 comprises N secondary windings, each secondary winding has a unique phase-shifting angle, and N is a positive integer greater than or equal to 2; the power conversion module comprises a plurality of power conversion units, the number of the power conversion units is equal to the number of the secondary windings; the power supply module comprises at least one power supply unit; the N secondary windings are connected to the N power conversion units one by one; each power supply unit is connected to at least one power conversion unit through a total DC bus; each power conversion unit comprises a first AC / DC converter and a first DC / DC converter, or comprises a second AC / DC converter; when the power conversion unit comprises the first AC / DC converter and the first DC / DC converter: the number of the first AC / DC converters is greater than or equal to 1, the number of the first DC / DC converters is K i , each first AC / DC converter is connected to a corresponding secondary winding, and each first AC / DC converter is connected to at least one first DC / DC converter, K i first DC / DC converters are connected in series and connected to the power supply unit through the total DC bus, and the output voltage of a single first DC / DC converter is a nominal voltage; when the power conversion unit comprises the second AC / DC converter, the number of the second AC / DC converters is K i , each second AC / DC converter is connected to a corresponding secondary winding, K i second AC / DC converters are connected in series and connected to the power supply unit through the total DC bus, and the output voltage of a single second AC / DC converter is a nominal voltage; wherein K i is a positive integer greater than or equal to 2, 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 i times the nominal voltage, since the current of the total DC bus is reduced, the power consumption of the cable can be reduced, and two power supply modules can be compatible, thereby reducing the cost of the DC power supply. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort. In the drawings:

[0039] Figure 1 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the first embodiment of the present application;

[0040] Figure 2 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the second embodiment of the present application;

[0041] Figure 3 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the third embodiment of the present application.

[0042] Figure 4 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the fourth embodiment of the present application.

[0043] Figure 5 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the fifth embodiment of the present application.

[0044] Figure 6 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the sixth embodiment of the present application.

[0045] Figure 7 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the seventh embodiment of the present application.

[0046] Figure 8 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the eighth embodiment of the present application.

[0047] Figure 9 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the ninth embodiment of the present application.

[0048] Figure 10 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the tenth embodiment of the present application.

[0049] Figure 11 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the eleventh embodiment of the present application.

[0050] Figure 12 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by the twelfth embodiment of the present application.

[0051] Figure 13 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a thirteenth embodiment of the present application.

[0052] Figure 14 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a fourteenth embodiment of the present application.

[0053] Figure 15 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a fifteenth embodiment of the present application.

[0054] Figure 16 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a sixteenth embodiment of the present application.

[0055] Figure 17 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a seventeenth embodiment of the present application.

[0056] Figure 18 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by an eighteenth embodiment of the present application.

[0057] Figure 19 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a nineteenth embodiment of the present application.

[0058] Figure 20 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twentieth embodiment of the present application.

[0059] Figure 21 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-first embodiment of the present application.

[0060] Figure 22 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-second embodiment of the present application.

[0061] Figure 23 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-third embodiment of the present application.

[0062] Figure 24 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-fourth embodiment of the present application.

[0063] Figure 25 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-fifth embodiment of the present application.

[0064] Figure 26is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-sixth embodiment of the present application.

[0065] Figure 27 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-seventh embodiment of the present application.

[0066] Figure 28 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-eighth embodiment of the present application.

[0067] Figure 29 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a twenty-ninth embodiment of the present application.

[0068] Figure 30 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a thirtieth embodiment of the present application.

[0069] Figure 31 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a thirty-first embodiment of the present application.

[0070] Figure 32 is a structural schematic diagram of a direct current power supply system based on a Panama power supply provided by a thirty-second embodiment of the present application. DETAILED DESCRIPTION

[0071] To make the objects, technical solutions, and advantages of the embodiments of the present application clearer, further specifically describe the embodiments of the present application below with reference to the drawings. Here, the illustrative embodiments of the present application and their descriptions are used to explain the present application, but are not used as limitations of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any manner without conflict. The acquisition, storage, use, processing, etc. of data in the technical solutions in the present application all comply with relevant provisions of laws and regulations. The user information in the embodiments of the present application is obtained through legal and compliant ways, and the acquisition, storage, use, processing, etc. of the user information is authorized and agreed by the client.

[0072] To facilitate the understanding of the technical solutions provided by the present application, first describe the related content of the technical solutions of the present application.

[0073] To reduce the power supply cost of the Panama power supply scheme, the present application provides a direct current power supply system based on a Panama power supply, which improves the output voltage of the power conversion module, thereby improving the bus voltage, reducing the bus current, and reducing the cable loss. Due to the increase of the output voltage, the current becomes smaller, the switching capacity becomes smaller, and the cable becomes thinner, so that the cost of the downstream direct current power distribution system becomes lower, and the loss becomes lower.

[0074] In addition, in the prior art, the energy storage battery is directly connected in parallel to the DC bus, and when the load changes, the energy storage battery discharges to the load and the power conversion module charges the energy storage battery, which causes the number of charging and discharging of the battery to increase and reduces the service life of the energy storage battery. In the present application, the energy storage module is no longer connected in parallel to the output side of the power conversion module, but is connected to the rectification link, which can more effectively control the charging and discharging of the energy storage module and improve the service life.

[0075] As shown in Figures 1 to 9 , the DC power supply system based on Panama power supply provided by the embodiment of the present application comprises a phase-shift transformer 1, a power conversion module 2 and a power supply module 3:

[0076] One end of the power conversion module 2 is connected with the phase-shift transformer 1, and the other end of the power conversion module 2 is connected with the power supply module 3;

[0077] The phase-shift transformer 1 comprises N secondary side windings, each of which has a unique phase-shift angle corresponding thereto, and N is a positive integer greater than or equal to 2;

[0078] The power conversion module 2 comprises a plurality of power conversion units, the number of the power conversion units is equal to the number of the secondary side windings; and the power supply module 3 comprises at least one power supply unit;

[0079] The N secondary side windings are connected with the N power conversion units one by one; and each of the power supply units is connected with at least one power conversion unit through a total DC bus;

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

[0081] When the power conversion unit comprises the first AC / DC converter and the first DC / DC converter, the number of the first AC / DC converters is greater than or equal to 1, and the number of the first DC / DC converters is K i , each of the first AC / DC converters is connected with a corresponding secondary side winding, each of the first AC / DC converters is further connected with at least one first DC / DC converter, K i first DC / DC converters are connected in series and then connected with the power supply unit through the total DC bus, and the output voltage of a single first DC / DC converter is a nominal voltage; when the power conversion unit comprises the second AC / DC conversion unit, the number of the second AC / DC conversion units is K i , each of the second AC / DC conversion units is connected with a corresponding secondary side winding, K i second AC / DC conversion units are connected in series and then connected with the power supply unit through the total DC bus, and the output voltage of a single second AC / DC conversion unit is a nominal voltage; wherein, Ki K 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, wherein the standard output voltage of the power conversion unit is K i times the nominal voltage.

[0083] Specifically, the phase-shifting transformer 1 can include a primary winding 102 and N secondary windings. The primary winding 102 is connected to a first alternating current, such as a 10kV alternating current. The phase-shifting transformer 1 is used to convert the first alternating current into a second alternating current. The voltage corresponding to the first alternating current is higher than the voltage corresponding to the second alternating current. The second alternating current is output to the N power conversion units through the N secondary windings. The i-th secondary winding has a corresponding power conversion unit, i.e., a power conversion unit connected to the i-th secondary winding. Each secondary winding has a unique phase-shifting angle, i.e., the phase-shifting angles of the secondary windings are different from each other. 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 alternating current and the second alternating current are set according to actual needs, which are not limited by the embodiments of the present application. The number of secondary windings is set according to actual needs, which is not limited by the embodiments of the present application. N is a positive integer greater than or equal to 2.

[0084] The power conversion module 2 includes a plurality of power conversion units, and the number of power conversion units is equal to the number of secondary windings. The power supply module 3 includes at least one power supply unit. The N secondary windings are connected to the N power conversion units one by one, i.e., the output end of each secondary winding is connected to the input end of the corresponding power conversion unit. The power conversion unit can convert the input alternating current into a first direct current, and the first direct current is transmitted to the power supply module 3 through the total DC bus. Each power supply unit is connected to at least one power conversion unit, and the power supply unit supplies power to the load.

[0085] The standard output voltage of the i-th power conversion unit corresponding to the i-th secondary winding is K i times the nominal voltage, for example, the value in the range of 200-288V specified in YD / T 2378-2020 Communication 240V DC Power Supply System, or the value in the range of 270-4100V specified in YD / T 3089 Communication 336V DC Power Supply System. The standard output voltages of the corresponding power conversion units of the secondary windings can be the same, or there can be power conversion units with different standard output voltages among the N power conversion units corresponding to the N secondary windings. The voltage of the total DC bus is equal to the output voltage of the connected power conversion unit. 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. i 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 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 2As shown, the DC power supply system based on the Panama power supply comprises a phase-shift transformer 1, a power conversion module 2 and a power supply module 3. One end of the power conversion module 2 is connected with the phase-shift transformer 1, and the other end of the power conversion module 2 is connected with the power supply module 3. The phase-shift transformer 1 comprises three secondary winding groups: a secondary winding group 101-1, a secondary winding group 101-2 and a secondary winding group 101-3. Each secondary winding group has a unique phase-shift angle.

[0090] The power conversion module 2 comprises a power conversion unit 2-1, a power conversion unit 2-2 and a power conversion unit 2-3. The power supply module 3 comprises a power supply unit 3-1 and a power supply unit 3-2. The input end of the power conversion unit 2-1 is connected with the output end of the secondary winding group 101-1, and the output end of the power conversion unit 2-1 is connected with the total DC bus 4-1 and 4-2. The input end of the power conversion unit 2-2 is connected with the output end of the secondary winding group 101-2, and the output end of the power conversion unit 2-2 is connected with the total DC bus 4-3 and 4-4. The input end of the power conversion unit 2-3 is connected with the output end of the secondary winding group 101-3, and the output end of the power conversion unit 2-3 is connected with the total DC bus 4-5 and 4-6. The total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6 are connected in parallel.

[0091] The input end of the power supply unit 3-1 is connected with the total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6 respectively. The input end of the power supply unit 3-2 is connected with the total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6 respectively. The standard output voltage of each power conversion unit is the same. The standard output voltage of the power conversion unit 2-1 is K i times of the nominal voltage, the standard output voltage of the power conversion unit 2-2 is K i times of the nominal voltage, and the standard output voltage of the power conversion unit 2-3 is K i times of the nominal voltage. The voltage of the total DC bus 4-1 and 4-2 is equal to the output voltage of the power conversion unit 2-1, the voltage of the total DC bus 4-3 and 4-4 is equal to the output voltage of the power conversion unit 2-2, and the voltage of the total DC bus 4-5 and 4-6 is equal to the output voltage of the power conversion unit 2-3. The input voltage of the power supply unit 3-1 is equal to K i times of the nominal voltage. The input voltage of the power supply unit 3-2 is equal to K i times of the nominal voltage.

[0092] For example, as Figure 3As shown, the power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2, and a power conversion unit 2-3. The power supply module 3 includes a power supply unit 3-1, a power supply unit 3-2, and a power supply unit 3-3. The standard output voltage of each power conversion unit can not be the same.

[0093] The 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, which are connected in parallel at the output of the first AC / DC converter 201. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series and connected to the power supply unit 3-1 through the total DC buses 4-1 and 4-2. The standard output voltage of the power conversion unit 2-1 is twice the nominal voltage, the output voltage of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 is the nominal voltage, the voltage of the total DC buses 4-1 and 4-2 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-1 is equal to twice the nominal voltage.

[0094] The 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, which are connected in parallel at the output of the first AC / DC converter 201. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series and connected to the power supply unit 3-2 through the total DC buses 4-3 and 4-4. The standard output voltage of the power conversion unit 2-2 is twice the nominal voltage, the output voltage of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 is the nominal voltage, the voltage of the total DC buses 4-3 and 4-4 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-2 is equal to twice the nominal voltage.

[0095] The 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, which are connected in parallel at the output of the first AC / DC converter 201. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series and connected to the power supply unit 3-3 via the total DC bus 4-5 and 4-6. The standard output voltage of the power conversion unit 2-3 is twice the nominal voltage, the output voltage of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 is the nominal voltage, and the voltage of the total DC bus 4-5 and 4-6 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-3 is equal to twice the nominal voltage.

[0096] For example, as shown in FIG. 2, the power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2 and a power conversion unit 2-3. The power supply module 3 includes a power supply unit 3-1, a power supply unit 3-2 and a power supply unit 3-3. The standard output voltage of each power conversion unit can be different. Figure 4

[0097] 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 of the first DC / DC converter 202-1 is connected to the output of the first AC / DC converter 201-1, and the input of the first DC / DC converter 202-2 is connected to the output of the first AC / DC converter 201-2. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series and connected to the power supply unit 3-1 via the total DC bus 4-1 and 4-2. The standard output voltage of the power conversion unit 2-1 is twice the nominal voltage, the output voltage of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 is the nominal voltage, and the voltage of the total DC bus 4-1 and 4-2 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-1 is equal to 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] The 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 terminals 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 total DC bus 4-1 and 4-2. The standard output voltage of the power conversion unit 2-1 is twice the nominal voltage, the output voltage of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 is the nominal voltage, and the voltage of the total DC bus 4-1 and 4-2 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-1 is equal to twice the nominal voltage.

[0102] The 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 total DC bus 4-3 and 4-4. The standard output voltage of the power conversion unit 2-2 is twice the nominal voltage, the output voltage of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 is the nominal voltage, and the voltage of the total DC bus 4-3 and 4-4 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-3 is equal to twice the nominal voltage.

[0103] The 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 total DC bus 4-5 and 4-6. The standard output voltage of the 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 is the nominal voltage, and the voltage of the total DC bus 4-5 and 4-6 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-3 is equal to twice the nominal voltage.

[0104] For example, as Figure 6As shown, the power conversion module 2 includes a power conversion unit 2-1 and a power conversion unit 2-2. The power supply module 3 includes a power supply unit 3-1 and a 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 of the first AC / DC converter 201-1 is connected in parallel to the first DC / DC converter 202-1 and the first DC / DC converter 202-2. The output of the first AC / DC converter 201-2 is connected in parallel to the first DC / DC converter 202-3 and the first DC / DC converter 202-4. The first DC / DC converter 202-1, the first DC / DC converter 202-2, the first DC / DC converter 202-3, and the first DC / DC converter 202-4 are connected in series and connected to the power supply unit 3-1 through the total DC bus 4-1 and 4-2. The standard output voltage of the power conversion unit 2-1 is 4 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 4 times the nominal voltage. The input voltage of the power supply unit 3-1 is equal to 4 times the nominal voltage.

[0106] 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, a first DC / DC converter 202-2, a first DC / DC converter 202-3, and a first DC / DC converter 202-4. The output of the first AC / DC converter 201-1 is connected in parallel to the first DC / DC converter 202-1 and the first DC / DC converter 202-2. The output of the first AC / DC converter 201-2 is connected in parallel to the first DC / DC converter 202-3 and the first DC / DC converter 202-4. The first DC / DC converter 202-1, the first DC / DC converter 202-2, the first DC / DC converter 202-3, and the first DC / DC converter 202-4 are connected in series and connected to the power supply unit 3-2 through the total DC bus 4-3 and 4-4. The standard output voltage of the power conversion unit 2-2 is 4 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 4 times the nominal voltage. The input voltage of the power supply unit 3-2 is equal to 4 times the nominal voltage.

[0107] For example, as shown in FIG. 2, the power conversion module 2 includes a power conversion unit 2-1 and a power conversion unit 2-2. The power supply module 3 includes a power supply unit 3-1 and a power supply unit 3-2. Each power conversion unit includes two first AC / DC converters and four first DC / DC converters. Figure 7As shown, the power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2, and a power conversion unit 2-3. The power supply module 3 includes a power supply unit 3-1 and a power supply unit 3-2.

[0108] The 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, which are connected in parallel at the output of the first AC / DC converter 201, and the first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series to the total DC bus 4-1 and 4-2. The 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, which are connected in parallel at the output of the first AC / DC converter 201, and the first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series to the total DC bus 4-3 and 4-4. The 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, which are connected in parallel at the output of the first AC / DC converter 201, and the first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series to the total DC bus 4-5 and 4-6. The total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6 are connected in parallel. The input of the power supply unit 3-1 is connected to the total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6, respectively. The input of the power supply unit 3-2 is connected to the total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6, respectively.

[0109] The standard output voltage of each power conversion unit is the same. The standard output voltage of the power conversion unit 2-1 is twice the nominal voltage, the standard output voltage of the power conversion unit 2-2 is twice the nominal voltage, and the standard output voltage of the power conversion unit 2-3 is twice the nominal voltage. The voltage of the total DC bus 4-1 and 4-2 is equal to the output voltage of the power conversion unit 2-1, the voltage of the total DC bus 4-3 and 4-4 is equal to the output voltage of the power conversion unit 2-2, and the voltage of the total DC bus 4-5 and 4-6 is equal to the output voltage of the power conversion unit 2-3. The input voltage of the power supply unit 3-1 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-2 is equal to twice the nominal voltage.

[0110] For example, as shown in FIG. 2, the power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2, and a power conversion unit 2-3. The power supply module 3 includes a power supply unit 3-1 and a power supply unit 3-2. The standard output voltage of each power conversion unit is the same. Figure 8 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 end of the first DC / DC converter 202-1 is connected to the output end of the first AC / DC converter 201-1, and the input end of the first DC / DC converter 202-2 is connected to the output end of the first AC / DC converter 201-2. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series and connected to the total DC bus 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 end of the first DC / DC converter 202-1 is connected to the output end of the first AC / DC converter 201-1, and the input end of the first DC / DC converter 202-2 is connected to the output end of the first AC / DC converter 201-2. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series and connected to the total DC bus 4-3 and 4-4. The 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 end of the first DC / DC converter 202-1 is connected to the output end of the first AC / DC converter 201-1, and the input end of the first DC / DC converter 202-2 is connected to the output end of the first AC / DC converter 201-2. The first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in series and connected to the total DC bus 4-5 and 4-6. The total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6 are connected in parallel. The input end of the power supply unit 3-1 is connected to the total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6, respectively. The input end of the power supply unit 3-2 is connected to the total DC bus 4-1 and 4-2, the total DC bus 4-3 and 4-4, and the total DC bus 4-5 and 4-6, respectively.

[0111]

[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] The standard output voltage of each power conversion unit is the same. The standard output voltage of the power conversion unit 2-1 is twice the nominal voltage, the standard output voltage of the power conversion unit 2-2 is twice the nominal voltage, and the standard output voltage of the power conversion unit 2-3 is twice the nominal voltage. The output voltage of the first DC / DC converter 202-1 and the first DC / DC converter 202-2 is the nominal voltage. The voltage of the total DC bus 4-1 and 4-2 is equal to the output voltage of the power conversion unit 2-1, the voltage of the total DC bus 4-3 and 4-4 is equal to the output voltage of the power conversion unit 2-2, and the voltage of the total DC bus 4-5 and 4-6 is equal to the output voltage of the power conversion unit 2-3. The input voltage of the power supply unit 3-1 is equal to twice the nominal voltage. The input voltage of the power supply unit 3-2 is equal to twice the nominal voltage.

[0116] The DC power supply system based on the Panama power supply provided by the embodiment of the application comprises a phase-shifting transformer, a power conversion module and a power supply module, one end of the power conversion module is connected with the phase-shifting transformer, and the other end of the power conversion module is connected with the power supply module; the phase-shifting transformer comprises N secondary side windings, each secondary side winding has a unique phase-shifting angle, and N is a positive integer greater than or equal to 2; the power conversion module comprises a plurality of power conversion units, the number of the power conversion units is equal to the number of the secondary side windings; the power supply module comprises at least one power supply unit; the N secondary side windings are connected with the N power conversion units in one-to-one correspondence; each power supply unit is connected with at least one power conversion unit in correspondence through a total DC bus; each power conversion unit comprises a first AC / DC converter and a first DC / DC converter, or comprises a second AC / DC converter; when the power conversion unit comprises the first AC / DC converter and the first DC / DC converter: the number of the first AC / DC converters is greater than or equal to 1, the number of the first DC / DC converters is K i , each first AC / DC converter is connected with a corresponding secondary side winding, each first AC / DC converter is further connected with at least one first DC / DC converter, K i first DC / DC converters are connected in series and then connected with the power supply unit through the total DC bus, and the output voltage of a single first DC / DC converter is a nominal voltage; when the power conversion unit comprises the second AC / DC converter, the number of the second AC / DC converters is K i , each second AC / DC converter is connected with a corresponding secondary side winding, K i second AC / DC converters are connected in series and then connected with the power supply unit through the total DC bus, and the output voltage of a single second AC / DC converter is a nominal voltage; wherein 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 the power conversion unit 2-1 is connected to the first power supply 301-1 of the power supply unit 3-1 through the total 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 301-2 of the power supply unit 3-1 through the common connection line 5-1 and the total DC bus 4-2. The first DC / DC converter 202-1 of the power conversion unit 2-2 is connected to the first power supply 301-1 of the power supply unit 3-2 through the total 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 301-2 of the power supply unit 3-2 through the common connection line 5-2 and the total 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 301-1 of the power supply unit 3-3 through the total 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 total DC bus 4-6.

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

[0125] The positive total DC bus 4-1 is regarded as a positive DC bus, the positive input end of the first power supply 301-1 is connected with the positive total DC bus 4-1, and the negative input end of the first power supply 301-1 is connected with the common connection line 5-1. The positive input end of the first power supply 301-2 is connected with the common connection line 5-1, and the negative input end of the first power supply 301-2 is connected with the negative total DC bus 4-2. The positive total DC bus 4-1 is a positive bus for the common connection line 5-1, and the common connection line 5-1 can be regarded as a negative DC bus of the first power supply 301-1. The common connection line 5-1 is a positive bus for the negative total DC bus 4-2, and the common connection line 5 can be regarded as a positive DC bus of the first power supply 301-2. In the prior art, the first power supply 301-1 and the first power supply 301-2 need to be connected with positive DC buses and negative DC buses respectively (four cables in total). In the embodiment of the present application, the first power supply 301-1 and the first power supply 301-2 share the common connection line 5-1, and only the positive total DC bus, the negative total DC bus and the common connection line (three cables in total) can realize the connection between the power conversion unit 2-1 and the two first power supplies (301-1 and 301-2), thereby saving 25% of the cables, reducing the line cost and reducing the line loss. The bus voltage of the positive total DC bus 4-1 and the negative total DC bus 4-2 can be 2 times of the nominal voltage, and the first power supply 301-1 and the first power supply 301-2 can adopt the PSU in the prior art, which is equivalent to increasing the bus voltage and reducing the bus equivalent current on the basis of the compatible PSU input voltage level in the prior art, thereby reducing the loss. For the positive total 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 total 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, and there are two opposite DC currents on the common connection line 5-1, which can be offset to further reduce the power consumption of the cable.

[0126] Figure 10 Structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0127] For example, as Figure 11As shown, the power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2, and a power conversion unit 2-3. The power supply module 3 includes a power supply unit 3-1, a power supply unit 3-2, and a 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. Each power supply unit includes a first power supply 301-1 and a first power supply 301-2 connected in series.

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

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

[0130] Figure 11 Structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0131] The power supply can adopt a power supply unit (PSU) in the prior art, which is equivalent to increasing the bus voltage and reducing the bus equivalent current on the basis of the input voltage level compatible with the PSU in the prior art, thereby reducing the line loss. In addition, for two adjacent power supplies, since the common connection line is shared, the common connection line acts as the positive bus of one power supply and the negative bus of another power supply, that is, there are direct currents with opposite directions on the common connection line, which can be offset, thereby further reducing the power consumption of the cable. Further, since the two adjacent power supplies share the common connection line, the cable can be saved.

[0132] In the case of increasing the bus voltage at the output side of the power conversion module 2 for power supply, since the input voltage of the PSU in the prior art cannot be compatible, the PSU cannot be directly used, and the power supply scheme in the prior art cannot be used, a PSU with a higher input voltage level needs to be redesigned, which has a long design period and cannot be implemented in the short term. The specific structure of the power supply module provided in the embodiments of the present application can combine the PSU in the prior art to bear the increased bus voltage, thereby reducing the power supply cost on the basis of being compatible with the PSU in the prior art.

[0133] As 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 the power conversion unit 2-1 is 2 times the nominal voltage, the output voltage of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 of the power conversion unit 2-1 is equal to the nominal voltage, and the input voltage of the second power supply 302 of the power supply unit 3-1 is equal to the nominal voltage. The standard output voltage of the power conversion unit 2-2 is 2 times the nominal voltage, the output voltage of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 of the power conversion unit 2-2 is equal to the nominal voltage, and the input voltage of the second power supply 302 of the power supply unit 3-2 is equal to the nominal voltage. The standard output voltage of the power conversion unit 2-3 is 2 times the nominal voltage, the output voltage of the second AC / DC converter 203-1 and the second AC / DC converter 203-2 of the power conversion unit 2-3 is equal to the nominal voltage, and the input voltage of the second power supply 302 of the power supply unit 3-3 is equal to the nominal voltage.

[0144] Figure 13 Structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0145] On the basis of the above embodiments, further, the power conversion unit comprises a first AC / DC converter and a first DC / DC converter, wherein:

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

[0147] For example, as shown in Figure 4 and Figure 8 Each power conversion unit comprises 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 end of the first DC / DC converter 202-1 is connected to the output end of the first AC / DC converter 201-1, and the input end of the first DC / DC converter 202-2 is connected to the output end 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 configured to convert alternating current from the corresponding secondary winding into first direct current output.

[0152] For example, as shown in Figure 11 and Figure 13 , the power conversion module 2 comprises a power conversion unit 2-1, a power conversion unit 2-2 and a power conversion unit 2-3. Each power conversion unit comprises 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 the power conversion unit 2-1 converts alternating current from the secondary winding 101-1 into first direct current output; the second AC / DC converter 203-1-2 of the power conversion unit 2-1 converts alternating current from the secondary winding 101-2 into first direct current output. The second AC / DC converter 203-1 of the power conversion unit 2-2 converts alternating current from the secondary winding 101-2 into first direct current output; the second AC / DC converter 203-2 of the power conversion unit 2-2 converts alternating current from the secondary winding 101-2 into first direct current output. The second AC / DC converter 203-1 of the power conversion unit 2-3 converts alternating current from the secondary winding 101-3 into first direct current output; the second AC / DC converter 203-2 of the power conversion unit 2-3 converts alternating current from the secondary winding 101-3 into first direct current output.

[0154] As shown in Figures 14 to 17 , on the basis of the above-mentioned embodiments, further, the i-th power conversion unit further comprises K i first capacitors connected in series;

[0155] When the power conversion unit comprises at least one first AC / DC converter and K i first DC / DC converters, K i first capacitors are connected one-to-one with the K i first DC / DC converters in parallel with the output terminals of the first DC / DC converters;

[0156] When the power conversion unit comprises K i second AC / DC converters, K i first capacitors are connected one-to-one with the K i second AC / DC converters in parallel with the output terminals of the second AC / DC converters. The first capacitors can play the role of filtering and energy storage.

[0157] For example, as shown in Figure 14 The power conversion module 2 includes power conversion units 2-1, 2-2 and 2-3. The power supply module 3 includes power supply units 3-1, 3-2 and 3-3. Each power conversion unit includes a first AC / DC converter 201 and two first DC / DC converters, a first DC / DC converter 202-1 and a first DC / DC converter 202-2, which are connected in parallel at the output of the first AC / DC converter 201, respectively. The output of the first DC / DC converter 202-1 is connected in parallel with a first capacitor C1-1, and the output of the first DC / DC converter 202-2 is connected in parallel with a first capacitor C1-2. The first capacitor C1-1 and the first capacitor C1-2 are connected in series and connected in parallel to the total DC bus 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 the power conversion unit 2-1 is connected to the first power supply 301-1 of the power supply unit 3-1 through the total DC bus 4-1 and the common connection line 5-1; the first DC / DC converter 102-2 of the power conversion unit 2-1 is connected to the first power supply 301-2 of the power supply unit 3-1 through the common connection line 5-1 and the total DC bus 4-2. The first DC / DC converter 202-1 of the power conversion unit 2-2 is connected to the first power supply 301-1 of the power supply unit 3-2 through the total 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 301-2 of the power supply unit 3-2 through the common connection line 5-2 and the total 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 301-1 of the power supply unit 3-3 through the total 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 total DC bus 4-6.

[0159] Figure 14 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0160] For example, as shown in Figure 15As shown, the power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2 and a power conversion unit 2-3. The power supply module 3 includes a power supply unit 3-1, a power supply unit 3-2 and a power supply unit 3-3. Each power conversion unit includes a first AC / DC converter 201 and two first DC / DC converters, a first DC / DC converter 202-1 and a first DC / DC converter 202-2, which are connected in parallel at the output of the first AC / DC converter 201, respectively. The output of the first DC / DC converter 202-1 is connected in parallel with a first capacitor C1-1, and the output of the first DC / DC converter 202-2 is connected in parallel with a first capacitor C1-2. The first capacitor C1-1 and the first capacitor C1-2 are connected in series, and the first capacitor C1-1 and the first capacitor C1-2 are connected in parallel on the total DC bus 4-1 and 4-2. Each power supply unit includes a second power supply 302.

[0161] The first DC / DC converter 202-1 and the first DC / DC converter 102-2 of the power conversion unit 2-1 are connected in series and connected to the second power supply 302 of the power supply unit 3-1 through the total DC bus 4-1 and 4-2. The first DC / DC converter 202-1 and the first DC / DC converter 102-2 of the power conversion unit 2-2 are connected in series and connected to the second power supply 302 of the power supply unit 3-2 through the total DC bus 4-3 and 4-4. The first DC / DC converter 202-1 and the first DC / DC converter 102-2 of the power conversion unit 2-3 are connected in series and connected to the second power supply 302 of the power supply unit 3-3 through the total DC bus 4-5 and 4-6.

[0162] Figure 15 Structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

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

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

[0165] Figure 16 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0166] For example, 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 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 embodiment of the invention 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 impose limitations.

[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 comprises 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 end of the first DC / DC converter 202-1 of the power conversion unit 2-1 is connected to the first end of the second DC / DC converter 204-1, and the second end of the second DC / DC converter 204-1 is connected to the energy storage module 6-1. The output end of the first DC / DC converter 202-2 of the power conversion unit 2-1 is connected to the first end of the second DC / DC converter 204-2, and the second end of the second DC / DC converter 204-2 is connected to the energy storage module 6-1.

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

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

[0185] Figure 20 Structures and / or connection relationships not described in the foregoing are described in detail in the relevant embodiments above, and will not be described here.

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

[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 end of the second AC / DC converter 203-1 of the power conversion unit 2-1 is connected to the first end of the second DC / DC converter 204-1, and the second end of the second DC / DC converter 204-1 is connected to the energy storage module 6-1. The output end of the second AC / DC converter 203-2 of the power conversion unit 2-1 is connected to the first end of the second DC / DC converter 204-2, and the second end 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 end of the second AC / DC converter 203-1 of the power conversion unit 2-2 is connected to the first end of the second DC / DC converter 204-1, and the second end of the second DC / DC converter 204-1 is connected to the energy storage module 6-2. The output end of the second AC / DC converter 203-2 of the power conversion unit 2-2 is connected to the first end of the second DC / DC converter 204-2, and the second end 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 end of the second AC / DC converter 203-1 of the power conversion unit 2-3 is connected to the first end of the second DC / DC converter 204-1, and the second end of the second DC / DC converter 204-1 is connected to the energy storage module 6-3. The output end of the second AC / DC converter 203-2 of the power conversion unit 2-3 is connected to the first end of the second DC / DC converter 204-2, and the second end 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] The power conversion unit 2-2 comprises 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 end of the first DC / DC converter 202-1 of the power conversion unit 2-2 is connected to the second end of the second DC / DC converter 204-1, the first end of the second DC / DC converter 204-1 is connected to the energy storage module 6-2, and the second end of the second DC / DC converter 204-1 is connected in parallel with a second capacitor C2-1. The output end of the first DC / DC converter 202-2 of the power conversion unit 2-2 is connected to the second end of the second DC / DC converter 204-2, the first end of the second DC / DC converter 204-2 is connected to the energy storage module 6-2, and the second end of the second DC / DC converter 204-2 is connected in parallel with a second capacitor C2-2. 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 parallel with the total DC bus 4-3 and 4-4 after being connected in series, and the connection line of 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 comprises 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 end of the first DC / DC converter 202-1 of the power conversion unit 2-3 is connected to the second end of the second DC / DC converter 204-1, the first end of the second DC / DC converter 204-1 is connected to the energy storage module 6-3, and the second end of the second DC / DC converter 204-1 is connected in parallel with a second capacitor C2-1. The output end of the first DC / DC converter 202-2 of the power conversion unit 2-3 is connected to the second end of the second DC / DC converter 204-2, the first end of the second DC / DC converter 204-2 is connected to the energy storage module 6-3, and the second end of the second DC / DC converter 204-2 is connected in parallel with a second capacitor C2-2. 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 parallel with the total DC bus 4-5 and 4-6 after being connected in series, and the connection line of the second capacitor C2-1 and the second capacitor C2-2 is connected to the common connection line 5-3.

[0197] Figure 22 Structures and / or connection relationships not described in the above embodiments are described in detail in the relevant embodiments above, and will not be described here.

[0198] On the basis of the above embodiments, each sub winding comprises n sub windings, 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 end of the secondary winding 101-2 is connected with the input end of the power conversion unit 2-2, the output end of one sub-winding of the secondary winding 101-2 is connected with the input end of one first AC / DC converter 201-1 of the power conversion unit 2-2, and the output end of another sub-winding of the secondary winding 101-2 is connected with the input end 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, 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 connected in series are connected with the power supply unit 3-2 through the total DC bus 4-3 and 4-4.

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

[0205] Figure 23 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

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

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

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

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

[0210] Figure 24 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

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

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

[0213] The output end of the secondary winding 101-2 is connected with the input end of the power conversion unit 2-2, the output end of one sub-winding of the secondary winding 101-2 is connected with the input end of one first AC / DC converter 201-1 of the power conversion unit 2-2, and the output end of the other sub-winding of the secondary winding 101-2 is connected with the input end of the other 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 with the second power supply 302 through the total DC bus 4-3 and 4-4.

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

[0215] Figure 25 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0216] For example, as shown in FIG. 1, the phase-shifting transformer 1 includes three secondary windings, each of which includes two sub-windings, and the two sub-windings correspond to the same phase-shifting angle. Figure 26 The power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2 and a power conversion unit 2-3. Each power conversion unit includes two second AC / DC converters. The power supply module includes a power supply unit 3-1, a power supply unit 3-2 and a power supply unit 3-3.

[0217] The output end of the secondary winding 101-1 is connected with the input end of the power conversion unit 2-1, the output end of one sub-winding of the secondary winding 101-1 is connected with the input end of the second AC / DC converter 203-1 of the power conversion unit 2-1, and the output end of another sub-winding of the secondary winding 101-1 is connected with the input end 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 with the power supply unit 3-1 through the total DC bus 4-1 and 4-2.

[0218] The output end of the secondary winding 101-2 is connected with the input end of the power conversion unit 2-2, the output end of one sub-winding of the secondary winding 101-2 is connected with the input end of the second AC / DC converter 203-1 of the power conversion unit 2-2, and the output end of another sub-winding of the secondary winding 101-2 is connected with the input end 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 with the power supply unit 3-2 through the total DC bus 4-3 and 4-4.

[0219] The output end of the secondary winding 101-3 is connected with the input end of the power conversion unit 2-3, the output end of one sub-winding of the secondary winding 101-3 is connected with the input end of the second AC / DC converter 203-1 of the power conversion unit 2-3, and the output end of another sub-winding of the secondary winding 101-3 is connected with the input end 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 with the power supply unit 3-3 through the total DC bus 4-5 and 4-6.

[0220] Figure 26 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

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

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

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

[0224] The output end of the secondary winding 101-3 is connected with the input end of the power conversion unit 2-3, the output end of one sub-winding of the secondary winding 101-3 is connected with the input end of the second AC / DC converter 203-1 of the power conversion unit 2-3, and the output end of another sub-winding of the secondary winding 101-3 is connected with the input end 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 with the power supply unit 3-3 through the total DC buses 4-5 and 4-6.

[0225] Figure 27 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0226] For example, as shown in FIG. 1, the phase-shifting transformer 1 includes three secondary windings, each of which includes two sub-windings, and the two sub-windings correspond to the same phase-shifting angle. Figure 28 The power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2 and a power conversion unit 2-3. Each power conversion unit includes two second AC / DC converters. The power supply module includes a power supply unit 3-1, a power supply unit 3-2 and a power supply unit 3-3. Each power supply unit includes one second power supply 302.

[0227] The output end of the secondary winding 101-1 is connected with the input end of the power conversion unit 2-1, the output end of one sub-winding of the secondary winding 101-1 is connected with the input end of the second AC / DC converter 203-1 of the power conversion unit 2-1, and the output end of another sub-winding of the secondary winding 101-1 is connected with the input end 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 with the second power supply 302 through the total DC bus 4-1 and 4-2.

[0228] The output end of the secondary winding 101-2 is connected with the input end of the power conversion unit 2-2, the output end of one sub-winding of the secondary winding 101-2 is connected with the input end of the second AC / DC converter 203-1 of the power conversion unit 2-2, and the output end of another sub-winding of the secondary winding 101-2 is connected with the input end 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 with the second power supply 302 through the total DC bus 4-3 and 4-4.

[0229] The output end of the secondary winding 101-3 is connected with the input end of the power conversion unit 2-3, the output end of one sub-winding of the secondary winding 101-3 is connected with the input end of the second AC / DC converter 203-1 of the power conversion unit 2-3, and the output end of another sub-winding of the secondary winding 101-3 is connected with the input end 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 with the second power supply 302 through the total DC bus 4-5 and 4-6.

[0230] Figure 28 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0231] For example, as shown in FIG. 1, the phase-shifting transformer 1 includes three secondary windings, each of which includes two sub-windings, and the two sub-windings correspond to the same phase-shifting angle. Figure 29 The power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2, and a power conversion unit 2-3. Each power conversion unit includes two first AC / DC converters and four first DC / DC converters, and the four first DC / DC converters are connected in series. The power supply module includes a power supply unit 3-1, a power supply unit 3-2, and a power supply unit 3-3. Each power supply unit includes four first power supplies, and the four first power supplies are 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 end of the secondary winding 101-2 is connected with the input end of the power conversion unit 2-2, the output end of the sub-winding 1012-1 of the secondary winding 101-2 is connected with the input end of a first AC / DC converter 201-1 of the power conversion unit 2-2, and the output end of the sub-winding 1012-2 of the secondary winding 101-2 is connected with the input end of a first AC / DC converter 201-2 of the power conversion unit 2-2; the first DC / DC converter 202-1 and the first DC / DC converter 202-2 are connected in parallel at the output end of the first AC / DC converter 201-1, the first DC / DC converter 202-3 and the first DC / DC converter 202-4 are connected in parallel at the output end of the first AC / DC converter 201-2; the output end of the first DC / DC converter 202-1 is connected in parallel with a first capacitor C1-1, the output end of the first DC / DC converter 202-2 is connected in parallel with a first capacitor C1-2, the output end of the first DC / DC converter 202-3 is connected in parallel with a second capacitor C2-1, and the output end of the first DC / DC converter 202-4 is connected in parallel with a second capacitor C2-2; the first DC / DC converter 202-1 of the power conversion unit 2-2 is connected with the first power supply 301-1 of the power supply unit 3-2 through a total DC bus 4-3 and a common connection line 5-4; the first DC / DC converter 202-2 of the power conversion unit 2-2 is connected with the first power supply 301-2 of the power supply unit 3-2 through the common connection line 5-4 and a common connection line 5-5; the first DC / DC converter 202-3 of the power conversion unit 2-2 is connected with the first power supply 301-3 of the power supply unit 3-2 through the common connection line 5-5 and a common connection line 5-6; and the first DC / DC converter 202-4 of the power conversion unit 2-2 is connected with the first power supply 301-4 of the power supply unit 3-2 through the common connection line 5-6 and a total DC bus 4-4.

[0234] Figure 29 Structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0235] For example, as shown in FIG. 1, the phase-shift transformer 1 includes three secondary windings, each of which includes two sub-windings, and the two sub-windings correspond to the same phase-shift angle. Figure 30 The power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2, and a power conversion unit 2-3. Each power conversion unit includes two first AC / DC converters and four first DC / DC converters, and the four first DC / DC converters are connected in series.

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

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

[0238] Figure 30 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0239] For example, as shown in FIG. 2, each of the secondary winding groups includes two sub-winding groups, and the two sub-winding groups correspond to the same phase shift angle. Figure 31 The power conversion module 2 includes a power conversion unit 2-1, a power conversion unit 2-2, and a power conversion unit 2-3. Each of the power conversion units 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 in correspondence, and the second AC / DC converter 203-2 is connected to the second DC / DC converter 204-2 in correspondence. The power supply module includes a power supply unit 3-1, a power supply unit 3-2, and a power supply unit 3-3. Each of the power supply units includes a first power supply 301-1 and a first power supply 301-2, and the first power supply 301-1 and the first power supply 301-2 are connected in series.

[0240] The output end of the secondary winding group 101-1 is connected to the input end of the power conversion unit 2-1, the output end of one of the sub-winding groups of the secondary winding group 101-1 is connected to the input end of the second AC / DC converter 203-1 of the power conversion unit 2-1, and the output end of the other sub-winding group of the secondary winding group 101-1 is connected to the input end 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 301-1 of the power supply unit 3-1 through the total 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 301-2 of the power supply unit 3-1 through the common connection line 5-1 and the total DC bus 4-2. The output end of the second AC / DC converter 203-1 of the power conversion unit 2-1 is connected to the first end of the second DC / DC converter 204-1, and the second end of the second DC / DC converter 204-1 is connected to the energy storage module 6-1. The output end of the second AC / DC converter 203-2 of the power conversion unit 2-1 is connected to the first end of the second DC / DC converter 204-2, and the second end 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 end of the secondary winding 101-1 is connected with the input end of the power conversion unit 2-1, the output end of one sub-winding of the secondary winding 101-1 is connected with the input end of the second AC / DC converter 203-1 of the power conversion unit 2-1, and the output end of another sub-winding of the secondary winding 101-1 is connected with the input end 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 and the second AC / DC converter 203-2 of the power conversion unit 2-1 are connected with the second power supply 302 of the power supply unit 3-1 through the total DC bus 4-1 and 4-2. The output end of the second AC / DC converter 203-1 of the power conversion unit 2-1 is connected with the first end of the second DC / DC converter 204-1, and the second end of the second DC / DC converter 204-1 is connected with the energy storage module 6-1. The output end of the second AC / DC converter 203-2 of the power conversion unit 2-1 is connected with the first end of the second DC / DC converter 204-2, and the second end of the second DC / DC converter 204-2 is connected with the energy storage module 6-1.

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

[0246] Figure 32 The structures and / or connection relationships not described in the above embodiments are described in detail in the above embodiments, and will not be described here.

[0247] In the description of the specification, the description of the terms "one embodiment", "one specific embodiment", "some embodiments", "for example", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0248] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present application. It should be understood that the above are only specific embodiments of the present application and are not used to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A direct current power supply system based on a Panama power source, characterized by, The power conversion module is connected with the phase-shifting transformer at one end and with the power supply module at the other end; The phase-shifting transformer comprises N secondary winding groups, each of which has a unique phase-shifting angle, and N is a positive integer greater than or equal to 2; The power conversion module comprises a plurality of power conversion units, the number of the power conversion units being equal to the number of the secondary winding groups; and the power supply module comprises at least one power supply unit; N secondary winding groups are connected with N power conversion units one by one; and each power supply unit is connected with at least one power conversion unit through a total DC bus; Each power conversion unit comprises a first AC / DC converter and a first DC / DC converter, or a second AC / DC conversion unit; When the power conversion unit comprises 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 converter is connected with the corresponding secondary winding, and each of the first AC / DC converter is further connected with at least one of the first DC / DC converter, K i first DC / DC converters are connected in series and then connected with the power supply unit through the total DC bus, and the output voltage of a single first DC / DC converter is a nominal voltage; when the power conversion unit comprises the second AC / DC converter, the number of the second AC / DC is K i , each of the second AC / DC converter is connected with the corresponding secondary winding, K i second AC / DC converters are connected in series and then connected with the power supply unit through the total DC bus, and the output voltage of a single second AC / DC converter is a nominal voltage; wherein 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 of the nominal voltage i .

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

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

4. The Panama power based DC power supply system of claim 1, wherein, The power conversion unit comprises the first AC / DC converter and the first DC / DC converter, wherein: The first AC / DC converter is used for converting alternating current from the corresponding secondary winding group into second direct current, and the first DC / DC converter is used for converting the second direct current into first direct current output.

5. The Panama power based DC power supply system according to claim 1, characterized by, The power conversion module comprises the second AC / DC converter, wherein: The second AC / DC converter is used for converting alternating current from the corresponding secondary winding group into first direct current output.

6. The Panama power source based DC power supply system of claim 1, wherein, The i-th power conversion unit further comprises K i first capacitors in series. When the power conversion unit comprises at least one first AC / DC converter and K i first DC / DC converters, K i first capacitors are connected to the K i first DC / DC converters one by one, wherein the first capacitors are connected in parallel with the output terminals of the first DC / DC converters. When the power conversion unit comprises K i second AC / DC converters, K i first capacitors are connected in one-to-one correspondence with the K i second AC / DC converters, wherein the first capacitors are connected in parallel with the output terminals of the second AC / DC converters.

7. The Panama power based DC power supply system of claim 1, wherein, Further comprising an energy storage module, wherein:

8. The Panama power based DC power supply system according to claim 7, characterized in that, Each of the power conversion units further comprises K i second DC / DC converters in series. When the power conversion unit comprises at least one first AC / DC converter and K i first DC / DC converters, K i second DC / DC converters are connected one by one with K i first DC / DC converters, wherein the first end of the second DC / DC converter is connected with the energy storage module, and the second end is connected with the first DC / DC converter. When the power conversion unit comprises K i second AC / DC converters, K i second DC / DC converters are connected one by one with K i second AC / DC converters, wherein the first end of the second DC / DC converter is connected with the energy storage module, and the second end is connected with the first DC / DC converter.

9. The Panama power based DC power supply system of claim 8, wherein, The power conversion unit further includes K i second capacitors in series. K i one of the second capacitors is connected in parallel with a second end of one of the second DC / DC converters. i one of the second capacitors is connected in parallel with a second end of one of the second DC / DC converters.

10. The Panama power source based DC power supply system of claim 1, wherein, Each secondary winding group comprises n sub-winding groups, n being greater than or equal to 2, wherein: The energy storage module is connected with the power conversion unit. When the power conversion unit comprises the first AC / DC converter and K i first DC / DC converters in series, the number of the first AC / DC converters is greater than or equal to n, wherein each of the sub-coils is connected to at least one of the first AC / DC converters, each of the first AC / DC converters is connected to at least one of the first DC / DC converters, and K i first DC / DC converters are connected in series to the power supply unit through the total DC bus. When the power conversion unit comprises K i second AC / DC converters in series, wherein each of the sub-windings is connected to at least one of the second AC / DC converters, K i second AC / DC converters are connected in series and connected to the power supply unit through the total DC bus.

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