Novel full-direct-current power supply system and method for data center with multi-energy access, electronic equipment and storage medium

Abstract

The invention discloses a data center novel full direct current power supply system with multi-energy access, a method, electronic equipment and a storage medium, and the system comprises a 2N + 1 power supply scheme, a power supply from two 110kV buses is constructed into two sections of DC750 direct current buses through a unidirectional rectification link, the two sections of direct current buses can be interconnected for standby through a bus tie switch, and the two sections of direct current buses are connected with each other through a bus tie switch. The two sections of direct current buses convert voltage into DC240V through the DC / DC converter to supply power to the data center server, the power supply reliability of the data center is guaranteed, meanwhile, each section of bus is connected with the DC / DC photovoltaic converter, the AC / DC fan converter, the DC / DC energy storage converter and the AC / DC photovoltaic absorption unit through the direct current switch cabinet, the access capability of new energy is improved, and the power supply reliability of the data center is improved. And the power supply of the data center is further ensured by modifying the operation mode under various working conditions such as upper-level commercial power loss and alternating current system failure.

Description

Technical Field

[0001] The present invention belongs to the technical field of power system distribution networks, and in particular relates to a new all-DC power supply system, method, electronic equipment and storage medium for a data center with multi-energy access. Background Art

[0002] Traditional data centers typically use UPS (uninterrupted power supply) AC power supply solutions, where electricity is converted from the AC system into DC power to supply servers after multiple stages of conversion. This results in low system efficiency. Subsequently, HVDC (high voltage direct current) power supply solutions began to be gradually promoted. Compared with the UPS solution, this solution eliminates the inverter link and directly outputs DC power, improving system efficiency. Based on the HVDC solution, the Panama power supply solution was introduced by integrating the previous-stage distribution transformer step-down, AC / DC rectification, and DC / DC transformation. However, since the output DC voltage is directly supplied to the load, this solution requires multiple stages of conversion when new energy is connected, resulting in low efficiency and restricting the proportion of green electricity consumption. Summary of the Invention

[0003] Purpose of the invention: The present invention provides a new all-DC power supply system, method, electronic equipment and storage medium for a data center with multi-energy access, with the aim of ensuring power supply under different working conditions of the data center, improving the access capability of new energy, and enhancing the overall energy utilization efficiency.

[0004] Technical solution: The present invention provides a new all-DC power supply system for data centers with multi-energy access, including: The AC / DC interconnection module includes two 110kV AC power supplies and one 110kV backup power supply. The two 110kV AC power supplies are connected to the corresponding 10kV AC busbars through 110kV / 10kV step-down transformers and AC switchgear. The 110kV backup power supply is connected to the AC busbar through a 110kV / 10kV step-down transformer and AC switchgear. The two 10kV AC busbars are connected to the corresponding 750VDC DC busbars through a feedback unit and a unidirectional rectifier unit. The DC and converter interconnection module is used to connect two 750VDC DC buses to a DC / DC energy storage converter via a DC switch or switch cabinet; simultaneously, the two 750VDC DC buses are connected to a DC / DC step-down converter via a DC switch or switch cabinet to power the server; simultaneously, the two 750VDC DC buses are connected to a DC / DC photovoltaic converter, an AC / DC wind turbine converter, and a DC / AC photovoltaic absorption converter via a DC switch or switch cabinet to access new energy equipment; The fault response module is used to implement fault response by switching the operating mode.

[0005] Furthermore, in the AC / DC interconnection module, the 10kV AC bus is connected to the 750VDC DC bus through a feedback unit and a unidirectional rectifier unit, including: the 10kV AC bus is connected to the 10kV side of the 10kV / 0.4kV step-down transformer through the AC switch cabinet of the feedback unit, the 0.4kV side of the 10kV / 0.4kV step-down transformer is connected to the AC side of the feedback AC / DC, and the DC side of the feedback AC / DC is connected to the 750VDC DC bus through the DC switch cabinet; the 10kV AC bus is simultaneously connected to the high-voltage side of the multi-winding phase-shifting transformer through the high-voltage switch cabinet of the unidirectional rectifier unit, the low-voltage side of the multi-winding phase-shifting transformer is respectively connected to multiple three-phase uncontrolled rectifier bridges, and is connected to the 750VDC DC bus through the DC switch cabinet.

[0006] Furthermore, in the DC and converter interconnection module, the 750VDC DC bus is connected to the converter, including: The 750VDC DC bus is connected to one end of the DC / DC energy storage converter through a DC switch or switch cabinet, and the other end of the DC / DC energy storage converter is connected to the energy storage battery to store and utilize electrical energy; The 750VDC DC bus is connected to one end of the DC / DC step-down converter through a DC switch or switch cabinet. The other end of the DC / DC step-down converter is connected to the terminal cabinet. The terminal cabinet is connected to the server through a DC cable to provide power to the server. The 750VDC DC bus is also connected to the DC / DC photovoltaic converter through a DC switch or switch cabinet. The input end of the DC / DC converter is connected to the photovoltaic panels after being combined by the combiner box, and is connected to short-distance small-capacity photovoltaic power. The 750VDC bus is connected to the DC side of the AC / DC wind turbine converter through a DC switch or switch cabinet, and the AC side of the AC / DC wind turbine converter is connected to the wind turbine to access wind power; The 750VDC bus is simultaneously connected to the DC / AC photovoltaic absorption converter through a DC switch or switch cabinet. The AC input of the DC / AC photovoltaic absorption converter is connected to the step-up transformer. The high-voltage side of the step-up transformer is connected to a 10kV grid bus through a high-voltage switch cabinet to absorb long-distance large-capacity photovoltaics.

[0007] Furthermore, in the fault response module, the fault response includes: When a single-side power supply fails, the two 10kV AC busbars are connected by closing the switch of the AC bus coupling cabinet, and energy is supplied simultaneously by the AC power supply on the unfaulted side and the renewable energy generation; When a single-side AC system fault occurs, the two 750VDC DC buses are connected by closing the DC bus coupler switch in the DC bus coupler cabinet, and energy is supplied by both the AC power supply on the surviving side and the renewable energy generation. When the AC power supply on both sides fails, the backup power supply is connected to the two 10kV AC busbars by closing the switch of the AC busbar cabinet, and energy is supplied by the backup power supply and renewable energy generation simultaneously; When a fault occurs in the AC system on both sides, the AC system and all bus tie switches are disconnected, and energy is supplied simultaneously by the energy storage battery and new energy generation.

[0008] The present invention also provides a novel all-DC power supply method for a data center with multi-energy access, comprising: Two 110kV AC power supplies and one 110kV standby power supply. The two 110kV AC power supplies are connected to the corresponding 10kV AC busbars through 110kV / 10kV step-down transformers and AC switchgear. The 110kV standby power supply is connected to the AC busbar coupler through 110kV / 10kV step-down transformers and AC switchgear. The two 10kV AC busbars are connected to the corresponding 750VDC busbars through feedback units and unidirectional rectifier units. Two 750VDC DC buses are connected to a DC / DC energy storage converter via a DC switch or switch cabinet. Simultaneously, the two 750VDC DC buses are connected to a DC / DC step-down converter via a DC switch or switch cabinet to power the server. Simultaneously, the two 750VDC DC buses are connected to a DC / DC photovoltaic converter, an AC / DC wind turbine converter, and a DC / AC photovoltaic absorption converter via a DC switch or switch cabinet to access new energy equipment. Fault response is achieved by switching the operating mode.

[0009] Furthermore, the 10kV AC bus is connected to the 750VDC DC bus through a feedback unit and a unidirectional rectifier unit, including: the 10kV AC bus is connected to the 10kV side of the 10kV / 0.4kV step-down transformer through the AC switchgear of the feedback unit, the 0.4kV side of the 10kV / 0.4kV step-down transformer is connected to the AC side of the feedback AC / DC, and the DC side of the feedback AC / DC is connected to the 750VDC DC bus through the DC switchgear; the 10kV AC bus is also connected to the high-voltage side of the multi-winding phase-shifting transformer through the high-voltage switchgear of the unidirectional rectifier unit, the low-voltage side of the multi-winding phase-shifting transformer is respectively connected to multiple three-phase uncontrolled rectifier bridges, and is connected to the 750VDC DC bus through the DC switchgear.

[0010] Furthermore, the 750VDC bus is connected to the converter, including: The 750VDC bus is connected to one end of the DC / DC energy storage converter via a DC switch or switch cabinet, and the other end of the DC / DC energy storage converter is connected to the energy storage battery to store and utilize electrical energy; The 750VDC DC bus is connected to one end of the DC / DC step-down converter through a DC switch or switch cabinet. The other end of the DC / DC step-down converter is connected to the terminal cabinet. The terminal cabinet is connected to the server through a DC cable to provide power to the server. The 750VDC DC bus is also connected to the DC / DC photovoltaic converter through a DC switch or switch cabinet. The input end of the DC / DC converter is connected to the photovoltaic panels after being combined by the combiner box, and is connected to short-distance small-capacity photovoltaic power. The 750VDC bus is connected to the DC side of the AC / DC wind turbine converter through a DC switch or switch cabinet, and the AC side of the AC / DC wind turbine converter is connected to the wind turbine to access wind power; The 750VDC bus is simultaneously connected to the DC / AC photovoltaic absorption converter through a DC switch or switch cabinet. The AC input of the DC / AC photovoltaic absorption converter is connected to the step-up transformer. The high-voltage side of the step-up transformer is connected to a 10kV grid bus through a high-voltage switch cabinet to absorb long-distance large-capacity photovoltaics.

[0011] Furthermore, the fault response design includes: When a single-side power supply fails, the two 10kV AC busbars are connected by closing the switch of the AC bus coupling cabinet, and energy is supplied simultaneously by the AC power supply on the unfaulted side and the renewable energy generation; When a single-side AC system fault occurs, the two 750VDC DC buses are connected by closing the DC bus coupler switch in the DC bus coupler cabinet, and energy is supplied by both the AC power supply on the surviving side and the renewable energy generation. When the AC power supply on both sides fails, the backup power supply is connected to the two 10kV AC busbars by closing the switch of the AC busbar cabinet, and energy is supplied by the backup power supply and renewable energy generation simultaneously; When a fault occurs in the AC system on both sides, the AC system and all bus tie switches are disconnected, and energy is supplied simultaneously by the energy storage battery and new energy generation.

[0012] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0013] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0014] Beneficial effects: The present invention provides a new all-DC power supply system, method, electronic device and storage medium for a data center with multi-energy access. Compared with the existing technology, it can use a phase-shifting transformer, a three-phase uncontrolled rectifier and a DC / DC converter to convert AC into DC voltage to ensure the power supply of the data center. At the same time, it uses a 750 DC bus to connect to photovoltaics, energy storage, fans and feedback units to improve the access capability of new energy. After the upper-level city power fails, it can further ensure the power supply of the data center through energy storage and other means. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the topology diagram of the new all-DC power supply system for the data center of the present invention.

[0016] Figure 2 This is the topology diagram of the unidirectional rectifier unit of the present invention.

[0017] Figure 3 for Figure 2 The diode circuit diagram of the three-phase uncontrolled rectifier bridge at (a) in the unidirectional rectifier unit.

[0018] Figure 4 This is the energy flow diagram when the present invention is operating normally.

[0019] Figure 5 This is the energy flow diagram when a single-side power grid fault occurs in the present invention.

[0020] Figure 6 This is the energy flow diagram when a single-side AC system fails in the present invention.

[0021] Figure 7 This is the energy flow diagram when a double-sided power grid fault occurs in the present invention.

[0022] Figure 8 This is the energy flow diagram of the double-sided AC system of the present invention when a fault occurs. DETAILED DESCRIPTION

[0023] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention made by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0024] Example 1

[0025] See also Figures 1 to 4As shown, the present invention provides a new all-DC power supply system for a data center with multi-energy access, including an AC / DC interconnection module, a DC and converter interconnection module, and a fault response module. The power supply system adopts a 2N+1 method, that is, it includes three 110kV power supplies, of which the 1#110kV AC bus is the first AC power supply, the 2#110kV AC bus is the second AC power supply, and the 3#110kV standby bus is the standby power supply. The 110kV high-voltage winding of the No.1 110kV / 10kV step-down transformer (numbered: No.1 in the figure) is connected to the 1#110kV through the AC switch cabinet, and the 10kV low-voltage winding is connected to the 1#10kV AC bus through the AC switch; the 110kV high-voltage winding of the No.2 110kV / 10kV step-down transformer (numbered: No.2 in the figure) is connected to the 2#110kV through the AC switch cabinet, and the 10kV low-voltage winding is connected to the 1#10kV AC bus through the AC switch. It is connected to the 2#10kV AC busbar through an AC switch; the 110kV high-voltage winding of the No. 3 110kV / 10kV step-down transformer (labeled as No. 3 in the figure) is connected to the 3#110kV standby busbar through an AC switch cabinet, and the 10kV low-voltage winding is connected to the AC bus coupling cabinet through an AC switch; the AC bus coupling cabinet is also connected to the 1#10kV AC busbar and the 2#10kV AC busbar through an AC switch or an AC switch cabinet.

[0026] In the AC / DC interconnection module, the 1#10kV AC busbar and the 2#10kV AC busbar are respectively connected to the 10kV / 0.4kV step-down transformer 1-2 through the AC switchgear 1-1 of the regenerative unit 1, the 0.4kV side of the 10kV / 0.4kV step-down transformer 1-2 is connected to the AC side of the regenerative AC / DC 1-3, and the DC side of the regenerative AC / DC 1-3 is connected to the 1#750VDC DC busbar through the DC switchgear 1-4. The 1#10kV AC bus is also connected to the high voltage side of the multi-winding phase-shifting transformer 2-2 through the high voltage switch cabinet 2-1 of the unidirectional rectifier unit 2, and the low voltage side of the multi-winding phase-shifting transformer 2-2 is respectively connected to multiple three-phase uncontrolled rectifier bridges 2-3, and is connected to the 1#750VDC DC bus through the DC switch cabinet; in this embodiment, the multi-winding phase-shifting transformer adopts an 8-winding phase-shifting transformer of 10kV / 540V, and each winding is phase-shifted by 30°, 22.5°, 15°, 7.5°, 0, -7.5°, -15°, and -22.5° respectively; the DC bus coupling cabinet is also connected to the 1#750VDC DC bus and the 2#750VDC DC bus through a DC switch or a DC switch cabinet. Figure 2 As shown, the low-voltage side of the multi-winding phase-shifting transformer 2-2 in this embodiment is connected to eight three-phase uncontrolled rectifier bridges 2-3. Figure 3 for Figure 2 The diode circuit diagram of the three-phase uncontrolled rectifier bridge.

[0027] In the DC and converter interconnection module, the 1#750VDC DC bus and the 2#750VDC DC bus are connected to various functional cabinets through DC switches or switch cabinets, including DC / DC photovoltaic converters, AC / DC wind turbine converters, DC / DC energy storage converters, DC / AC photovoltaic absorption converters, and DC / DC step-down converters. The 1#750VDC DC bus and the 2#750VDC DC bus are connected to the DC / DC photovoltaic converters through DC switches or switch cabinets, and the input of the DC / DC converter is connected to the photovoltaic panels after being combined by the combiner box, for short-distance, small-capacity photovoltaic access. The 1#750VDC DC bus and the 2#750VDC DC bus are connected to the DC side of the AC / DC wind turbine converter through DC switches or switch cabinets, and the AC side of the AC / DC converter is connected to the wind turbine for wind power access. The 1# 750VDC busbar and the 2# 750VDC busbar are each connected to one end of the DC / DC energy storage converter via a DC switch or switchgear. The other end of the energy storage converter is connected to the energy storage battery for energy storage and reuse. The 1# 750VDC busbar and the 2# 750VDC busbar are each connected to the DC / AC photovoltaic absorption converter via a DC switch or switchgear. The AC input of the DC / AC photovoltaic absorption converter is connected to the No. 4 step-up transformer (numbered 4 in the figure) or the No. 5 step-up transformer (numbered 5 in the figure). The high-voltage side of the step-up transformer is connected to a 10kV grid busbar through a high-voltage switchgear for long-distance, high-capacity photovoltaic absorption. The 1#750VDC DC bus and the 2#750VDC DC bus are respectively connected to the DC / DC step-down converter through a DC switch or a switch cabinet. The other end of the DC / DC step-down converter is connected to the column head cabinet. The column head cabinet is connected to the server through a DC cable to power the server.

[0028] When the power supply system operates normally and without faults, the electricity generated by wind power generation, local photovoltaic power generation and long-distance photovoltaic power generation is converged into the DC bus. The energy storage unit (DC / DC energy storage converter and energy storage battery) is charged according to the needs of the power supply system. The data center load is jointly powered by the first AC power supply and the second AC power supply (i.e., dual-sided mains power) and renewable energy power generation (wind power generation, local photovoltaic power generation and long-distance photovoltaic power generation). When the output of renewable energy power generation is large and the load of the data center is small, the dual-sided mains power supply gradually decreases to near zero, and the excess energy is fed back to the power grid after being inverted by the feedback unit, realizing efficient energy utilization and optimized distribution. The energy flow diagram is shown in the figure below. Figure 4 shown.

[0029] There is also a fault response module, which is used to respond to faults by switching operating modes under different working conditions to ensure continuous power supply to the data center.

[0030] Example 2

[0031] The connection method of the power supply system of this embodiment is the same as that of the first embodiment. The power supply system of this embodiment is for the case of a single-side power failure of the first AC power supply or the second AC power supply. The fault response module connects the 1#10kV AC bus and the 2#10kV AC bus by closing the switch of the AC bus coupling cabinet, thereby ensuring the normal operation of the system. The electric energy generated by wind power generation, local photovoltaic power generation and long-distance photovoltaic power generation is converged to the DC bus. The energy storage unit is charged according to the needs of the power supply system. The load of the data center is jointly powered by the AC power supply on the side that is not at fault (single-sided mains power) and new energy power generation. When the new energy power generation is large and the load of the data center is small, the single-sided mains power supply approaches zero, and the excess energy is fed back to the power grid through the feedback unit to achieve efficient utilization and optimized distribution of energy. The energy flow diagram is shown as follows. Figure 5 shown.

[0032] Example 3

[0033] The connection method of the power supply system of this embodiment is the same as that of embodiment 1. The power supply system of this embodiment is a case of single-sided AC system failure (including unidirectional rectifier unit failure). By closing the DC bus switch of the DC bus cabinet, the interconnection between the 1#750VDC DC bus and the 2#750VDC DC bus is achieved to ensure the power supply continuity of the DC bus. The electric energy generated by wind power generation, local photovoltaic power generation and long-distance photovoltaic power generation is converged to the DC bus. The energy storage unit is charged according to the needs of the power supply system. The data center load is jointly powered by the AC power supply on the non-faulty side (single-sided mains power) and new energy power generation. When the new energy power generation is large and the load is small, the single-sided mains power supply approaches zero, and the excess energy is fed back to the power grid through the feedback unit to achieve efficient utilization and optimized distribution of energy. The energy flow diagram is shown as follows. Figure 6 shown.

[0034] Example 4

[0035] The connection method of the power supply system of this embodiment is the same as that of the first embodiment. The power supply system of this embodiment is for the case of a failure of the AC power supply on both sides of the first AC power supply or the second AC power supply. By closing the three AC switches of the AC busbar, the 3#110kV backup power supply is connected to the 1#10kV AC bus and the 2#10kV AC bus to ensure the power supply continuity of the system. The electric energy generated by wind power generation, local photovoltaic power generation and long-distance photovoltaic power generation is converged to the DC bus. The energy storage unit is charged according to the needs of the power supply system. The data center load is jointly powered by the backup power supply and the new energy power generation. When the new energy power generation is large and the load is small, the energy supply of the backup power supply approaches zero, and the excess energy is fed back to the backup power grid through the feedback unit to achieve efficient utilization and optimized distribution of energy. The energy flow diagram is shown as follows. Figure 7 shown.

[0036] Example 5

[0037] The connection method of the power supply system of this embodiment is the same as that of embodiment 1. The power supply system of this embodiment is a case of a double-sided AC system failure (including a unidirectional rectifier unit failure). By disconnecting the AC system and all bus-connecting switches, it is completely disconnected from the faulty AC power supply. The electric energy generated by wind power generation, local photovoltaic power generation and long-distance photovoltaic power generation is converged to the DC bus, and the energy storage unit performs bus voltage stabilization. The data center load is simultaneously powered by energy storage batteries and new energy power generation. When the output of new energy power generation is large and the load is small, the energy storage supply approaches zero, and the excess energy is stored in the energy storage battery through the DC / DC energy storage converter. The energy flow diagram is shown as follows. Figure 8 shown.

Claims

1. A new all-DC power supply system for data centers with multi-energy access, characterized by: include: The AC / DC interconnection module includes two 110kV AC power supplies and one 110kV backup power supply. The two 110kV AC power supplies are connected to the corresponding 10kV AC busbars through 110kV / 10kV step-down transformers and AC switchgear. The 110kV backup power supply is connected to the AC busbar through a 110kV / 10kV step-down transformer and AC switchgear. The two 10kV AC busbars are connected to the corresponding 750VDC DC busbars through a feedback unit and a unidirectional rectifier unit. The DC and converter interconnection module is used to connect two 750VDC DC buses to a DC / DC energy storage converter via a DC switch or switch cabinet; simultaneously, the two 750VDC DC buses are connected to a DC / DC step-down converter via a DC switch or switch cabinet to power the server; simultaneously, the two 750VDC DC buses are connected to a DC / DC photovoltaic converter, an AC / DC wind turbine converter, and a DC / AC photovoltaic absorption converter via a DC switch or switch cabinet to access new energy equipment; The fault response module is used to implement fault response by switching the operating mode.

2. The novel all-DC power supply system for data centers with multi-energy access according to claim 1 is characterized in that: In the AC / DC interconnection module, the 10kV AC bus is connected to the 750VDC DC bus through a feedback unit and a unidirectional rectifier unit, including: the 10kV AC bus is connected to the 10kV side of the 10kV / 0.4kV step-down transformer through the AC switchgear of the feedback unit, the 0.4kV side of the 10kV / 0.4kV step-down transformer is connected to the AC side of the regenerative AC / DC, and the DC side of the regenerative AC / DC is connected to the 750VDC DC bus through the DC switchgear; the 10kV AC bus is also connected to the high-voltage side of the multi-winding phase-shifting transformer through the high-voltage switchgear of the unidirectional rectifier unit, the low-voltage side of the multi-winding phase-shifting transformer is respectively connected to multiple three-phase uncontrolled rectifier bridges, and is connected to the 750VDC DC bus through the DC switchgear.

3. The novel all-DC power supply system for data centers with multi-energy access according to claim 2 is characterized in that: In the DC and converter interconnection module, the 750VDC bus is connected to the converter, including: The 750VDC bus is connected to one end of the DC / DC energy storage converter via a DC switch or switch cabinet, and the other end of the DC / DC energy storage converter is connected to the energy storage battery to store and utilize electrical energy; The 750VDC DC bus is connected to one end of the DC / DC step-down converter through a DC switch or switch cabinet. The other end of the DC / DC step-down converter is connected to the terminal cabinet. The terminal cabinet is connected to the server through a DC cable to provide power to the server. The 750VDC DC bus is also connected to the DC / DC photovoltaic converter through a DC switch or switch cabinet. The input end of the DC / DC converter is connected to the photovoltaic panels after being combined by the combiner box, and is connected to short-distance small-capacity photovoltaic power. The 750VDC bus is connected to the DC side of the AC / DC wind turbine converter through a DC switch or switch cabinet, and the AC side of the AC / DC wind turbine converter is connected to the wind turbine to access wind power; The 750VDC bus is simultaneously connected to the DC / AC photovoltaic absorption converter through a DC switch or switch cabinet. The AC input of the DC / AC photovoltaic absorption converter is connected to the step-up transformer. The high-voltage side of the step-up transformer is connected to a 10kV grid bus through a high-voltage switch cabinet to absorb long-distance large-capacity photovoltaics.

4. The novel all-DC power supply system for data centers with multi-energy access according to claim 3 is characterized in that: In the fault response module, the fault response includes: When a single-side power supply fails, the two 10kV AC busbars are connected by closing the switch of the AC bus coupling cabinet, and energy is supplied simultaneously by the AC power supply on the unfaulted side and the renewable energy generation; When a single-side AC system fault occurs, the two 750VDC DC buses are connected by closing the DC bus coupler switch in the DC bus coupler cabinet, and energy is supplied by both the AC power supply on the surviving side and the renewable energy generation. When the AC power supply on both sides fails, the backup power supply is connected to the two 10kV AC busbars by closing the switch of the AC busbar cabinet, and energy is supplied by the backup power supply and renewable energy generation simultaneously; When a fault occurs in the AC system on both sides, the AC system and all bus tie switches are disconnected, and energy is supplied simultaneously by the energy storage battery and new energy generation.

5. A new all-DC power supply method for a data center with multi-energy access, characterized in that: include: Two 110kV AC power supplies and one 110kV standby power supply. The two 110kV AC power supplies are connected to the corresponding 10kV AC busbars through 110kV / 10kV step-down transformers and AC switchgear. The 110kV standby power supply is connected to the AC busbar coupler through 110kV / 10kV step-down transformers and AC switchgear. The two 10kV AC busbars are connected to the corresponding 750VDC busbars through feedback units and unidirectional rectifier units. Two 750VDC DC buses are connected to a DC / DC energy storage converter via a DC switch or switch cabinet. Simultaneously, the two 750VDC DC buses are connected to a DC / DC step-down converter via a DC switch or switch cabinet to power the server. Simultaneously, the two 750VDC DC buses are connected to a DC / DC photovoltaic converter, an AC / DC wind turbine converter, and a DC / AC photovoltaic absorption converter via a DC switch or switch cabinet to access new energy equipment. Fault response is achieved by switching the operating mode.

6. The novel all-DC power supply method for a data center with multi-energy access according to claim 5 is characterized in that: The 10kV AC bus is connected to the 750VDC DC bus through a feedback unit and a unidirectional rectifier unit, including: the 10kV AC bus is connected to the 10kV side of the 10kV / 0.4kV step-down transformer through the AC switchgear of the feedback unit, the 0.4kV side of the 10kV / 0.4kV step-down transformer is connected to the AC side of the feedback type AC / DC, and the DC side of the feedback type AC / DC is connected to the 750VDC DC bus through the DC switchgear; the 10kV AC bus is also connected to the high-voltage side of the multi-winding phase-shifting transformer through the high-voltage switchgear of the unidirectional rectifier unit, the low-voltage side of the multi-winding phase-shifting transformer is respectively connected to multiple three-phase uncontrolled rectifier bridges, and is connected to the 750VDC DC bus through the DC switchgear.

7. The novel all-DC power supply method for a data center with multi-energy access according to claim 6 is characterized in that: The 750VDC bus is connected to the converter, including: The 750VDC bus is connected to one end of the DC / DC energy storage converter via a DC switch or switch cabinet, and the other end of the DC / DC energy storage converter is connected to the energy storage battery to store and utilize electrical energy; The 750VDC DC bus is connected to one end of the DC / DC step-down converter through a DC switch or switch cabinet. The other end of the DC / DC step-down converter is connected to the terminal cabinet. The terminal cabinet is connected to the server through a DC cable to provide power to the server. The 750VDC DC bus is also connected to the DC / DC photovoltaic converter through a DC switch or switch cabinet. The input end of the DC / DC converter is connected to the photovoltaic panels after being combined by the combiner box, and is connected to short-distance small-capacity photovoltaic power. The 750VDC bus is connected to the DC side of the AC / DC wind turbine converter through a DC switch or switch cabinet, and the AC side of the AC / DC wind turbine converter is connected to the wind turbine to access wind power; The 750VDC bus is simultaneously connected to the DC / AC photovoltaic absorption converter through a DC switch or switch cabinet. The AC input of the DC / AC photovoltaic absorption converter is connected to the step-up transformer. The high-voltage side of the step-up transformer is connected to a 10kV grid bus through a high-voltage switch cabinet to absorb long-distance large-capacity photovoltaics.

8. The novel all-DC power supply method for a data center with multi-energy access according to claim 7 is characterized in that: The fault response design includes: When a single-side power supply fails, the two 10kV AC busbars are connected by closing the switch of the AC bus coupling cabinet, and energy is supplied simultaneously by the AC power supply on the unfaulted side and the renewable energy generation; When a single-side AC system fault occurs, the two 750VDC DC buses are connected by closing the DC bus coupler switch in the DC bus coupler cabinet, and energy is supplied by both the AC power supply on the surviving side and the renewable energy generation. When the AC power supply on both sides fails, the backup power supply is connected to the two 10kV AC busbars by closing the switch of the AC busbar cabinet, and energy is supplied by the backup power supply and renewable energy generation simultaneously; When a fault occurs in the AC system on both sides, the AC system and all bus tie switches are disconnected, and energy is supplied simultaneously by the energy storage battery and new energy generation.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 5 to 8 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 5 to 8 are implemented.

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