Fuel cell BOP power supply device and system, control method, equipment and medium

Abstract

The invention discloses a fuel cell BOP power supply device and system, a control method, equipment and a medium, is applied to the technical field of fuel cells, and particularly adopts a direct-current power supply system taking power from a power grid as a main power supply and an energy storage system as a hot backup to supply power to a BOP in parallel, determining a target output voltage not lower than the output voltage of the energy storage system based on the current SOC of the energy storage system, and controlling the DC power supply system to output the target output voltage; when it is determined that the direct-current power supply system has the power supply fault, the connection between the direct-current power supply system and the BOP power supply bus is controlled to be disconnected, and since the energy storage system is always hung on the BOP power supply bus for continuous output from the time when the direct-current power supply system has the power supply fault to the time when the direct-current power supply system is cut out, the performance of the BOP power supply is not affected, and normal power generation is ensured; time is won for power-off maintenance, normal shutdown according to plans is guaranteed, the sudden stop frequency is reduced, and the service life of a power generation system is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a fuel cell BOP power supply device, system, control method, equipment and medium. Background Art

[0002] Fuel cell stationary power generation system uses hydrogen fuel to feed fuel cells for power generation, which belongs to the category of clean energy power generation, and has the advantages of no pollution and high efficiency. The BOP (Balance of Plant, non-battery components) of fuel cell stationary power generation system plays an important role in the operation of fuel cells. Ensuring efficient and uninterrupted power supply of BOP is the prerequisite for the normal operation of fuel cell stationary power generation system. The power demand of BOP is directly related to the power generation efficiency and energy utilization rate of fuel cell stationary power generation system. How to achieve stable, safe and efficient power supply of BOP in fuel cell stationary power generation system, and then ensure the stable and normal operation of fuel cell stationary power generation system, is a hot issue in the current research of fuel cell technology. Summary of the invention

[0003] The present application provides a fuel cell BOP power supply device, system, control method, equipment and medium to solve the problem of unstable power supply of fuel cell BOP in the prior art, thereby affecting the life of the fuel cell fixed power generation system. Specifically, the technical solution provided by the present application is as follows:

[0004] On the one hand, the present application provides a fuel cell BOP power supply device, including a DC power supply system and an energy storage system; the input end of the DC power supply system is connected to the power grid through an AC bus, and the power supply end of the DC power supply system is connected to the power supply bus of the fuel cell BOP in the fuel cell fixed power generation system through a first DC bus; the first power supply end of the energy storage system is connected to the power supply bus of the fuel cell BOP in the fuel cell fixed power generation system through a second DC bus, and the second power supply end of the energy storage system is connected to the charging end of the DC power supply system through a third DC bus.

[0005] On the other hand, the present application provides a fuel cell fixed power generation system, including a fuel cell, a grid-connected converter, a transformer, a control and monitoring system, and the above-mentioned fuel cell BOP power supply device; the primary side of the transformer is connected to the power grid, the secondary side of the transformer is connected to the AC side of the grid-connected converter, and the DC side of the grid-connected converter is connected to the DC power output end of the fuel cell; the control and monitoring system is respectively communicated with the grid-connected converter, the fuel cell, and the energy storage system and the DC power supply system in the fuel cell BOP power supply device.

[0006] On the other hand, the present application provides a fuel cell BOP power supply control method, which is applied to the control and monitoring system in the above-mentioned fuel cell fixed power generation system, comprising:

[0007] In the process of the energy storage system and the DC power supply system in the fuel cell BOP power supply device being connected in parallel to supply power to the fuel cell BOP in the fuel cell stationary power generation system, the current SOC (State of Capacity) of the energy storage system is obtained;

[0008] Based on the current SOC of the energy storage system, determine the target output voltage of the DC power supply system, and control the DC power supply system to output the target output voltage; wherein the target output voltage of the DC power supply system is not lower than the current output voltage of the energy storage system;

[0009] When it is determined that a power supply failure occurs in the DC power supply system, control is performed to disconnect the connection between the power supply end of the DC power supply system and the power supply bus of the fuel cell BOP.

[0010] On the other hand, the present application also provides a fuel cell BOP power supply control device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned fuel cell BOP power supply control method is implemented.

[0011] On the other hand, the present application also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, the above-mentioned fuel cell BOP power supply control method is implemented.

[0012] The beneficial effects of this application are as follows:

[0013] The present application adopts a DC power supply system that draws power from the power grid as the main power supply and an energy storage system as a hot backup in parallel to power the fuel cell BOP. This not only ensures the continuous and stable output of the power supply voltage of the fuel cell BOP, but also effectively avoids the problem of power supply voltage drop of the fuel cell BOP caused by the response time of selecting the fuel cell or the power grid to power the fuel cell BOP. It can also achieve the decoupling of power generation of the fuel cell fixed power generation system and power supply of the fuel cell BOP, thereby effectively avoiding the problem that when only the fuel cell stack or the power grid is used to power the fuel cell BOP, the fuel cell BOP is immediately powered off due to power generation / power supply failure of the fuel cell stack or the power grid, which then causes the fuel cell to enter an emergency stop state and cannot execute processes such as stack purge, thereby reducing the life of the stack. In addition, in the process of the DC power supply system and the energy storage system being connected in parallel to power the fuel cell BOP, the output of the DC power supply system is controlled to be not lower than the output of the energy storage system. The target output voltage of the output voltage can be used to supply power to the fuel cell BOP while ensuring that the remaining battery capacity of the energy storage system is maintained at the upper limit of the battery capacity. Therefore, after it is determined that a power failure occurs in the DC power system and the DC power system cuts off the power supply, the fuel cell BOP can continue to be powered by the energy storage system. Moreover, the energy storage system is always connected to the power supply bus of the fuel cell BOP to continuously supply power to the fuel cell BOP from the time when the power failure occurs in the DC power system to the time when the DC power system cuts off the power supply. Therefore, the power supply of the fuel cell BOP is uninterrupted and does not affect the normal power generation of the fuel cell fixed power generation system. This can buy time for the power outage maintenance of the fuel cell fixed power generation system and ensure that the fuel cells in the fuel cell fixed power generation system can be shut down normally after executing the stack purge and other processes as planned, thereby reducing the number of emergency stops of the fuel cell and ensuring the service life of the fuel cell and the fuel cell fixed power generation system.

[0014] Other features and advantages of the present application will be described in the subsequent description, and in part, will become apparent from the description, or will be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0016] Figure 1 A schematic diagram of a structure of a fuel cell BOP power supply device and a fuel cell fixed power generation system in an embodiment of the present application;

[0017] Figure 2It is another structural schematic diagram of the fuel cell BOP power supply device and the fuel cell fixed power generation system in the embodiment of the present application;

[0018] Figure 3 It is a schematic diagram of the overview of the BOP power supply control method in the embodiment of the present application;

[0019] Figure 4 A schematic diagram of the flow of electric energy when the DC power supply system in an embodiment of the present application supplies power to the fuel cell BOP and charges the energy storage system;

[0020] Figure 5 This is a schematic diagram of the flow of electric energy when the energy storage system supplies power to the fuel cell BOP in an embodiment of the present application;

[0021] Figure 6 A schematic diagram of the flow of electric energy when the fuel cell reverses power in an embodiment of the present application;

[0022] Figure 7 This is a functional structure diagram of a BOP power supply control device in an embodiment of the present application;

[0023] Figure 8 This is a schematic diagram of the hardware structure of the BOP power supply control device in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and beneficial effects of this application clearer, the technical solution in the embodiment of this application will be clearly and completely described below in conjunction with the drawings in the embodiment of this application. Obviously, the described embodiment is only a part of the embodiment of this application, not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] In order to facilitate those skilled in the art to better understand the present application, the technical terms involved in the present application are briefly introduced below.

[0026] The fuel cell BOP power supply device is a device for supplying power to the fuel cell BOP in the fuel cell fixed power generation system. In the present application, the fuel cell BOP power supply device adopts a DC power supply system that draws power from the power grid as the main power supply and adopts an energy storage system as a hot backup in parallel to supply power to the fuel cell BOP.

[0027] The fuel cell fixed power generation system is a distributed energy source with flexibly configurable capacity and can be connected to the power grid. It uses hydrogen fuel to be fed into the fuel cell to generate electricity. In this application, the fuel cell fixed power generation system uses the above-mentioned fuel cell BOP power supply device to power the fuel cell BOP.

[0028] It should be noted that the terms "first", "second", etc. mentioned in this application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein.

[0029] After introducing the technical terms involved in this application, the application scenarios and design concepts of this application are briefly introduced.

[0030] Traditionally, the following methods are used to power the fuel cell BOP in a fuel cell fixed power generation system: the first method is to use the direct current output by the fuel cell and converted by DC / DC to power the fuel cell BOP, the second method is to use the direct current output by the power grid and converted by the converter to power the fuel cell BOP, and the third method is to switch between fuel cell power supply and power grid power supply to power the fuel cell BOP according to the working conditions of the fuel cell fixed power generation system. However, in the first method mentioned above, once a power generation failure occurs in the fuel cell stack, the fuel cell BOP is immediately powered off, the fuel cell enters an emergency stop state, and processes such as stack purge cannot be performed, thereby reducing the life of the fuel cell stack. In the second method mentioned above, similar to the first method, in the event of a power grid failure, the fuel cell BOP is immediately powered off, and the fuel cell also enters an emergency stop state, and processes such as stack purge cannot be performed, thereby reducing the life of the fuel cell stack. In the third method mentioned above, a relay or a switch device is generally used to select a fuel cell or a power grid to power the fuel cell BOP. The control signal of the relay or the switch device and the action switching of the relay or the switch device require response time. This response time will cause the power supply voltage of the fuel cell BOP to drop, making it difficult for the fuel cell BOP to work stably, and even causing the fuel cell fixed power generation system to shut down.

[0031] To this end, the present application adopts a DC power supply system that draws power from the power grid as the main power supply and an energy storage system as a hot backup in parallel to power the fuel cell BOP. In this way, not only can the continuous and stable output of the power supply voltage of the fuel cell BOP be guaranteed, and the problem of power supply voltage drop of the fuel cell BOP caused by the response time of selecting the fuel cell or the power grid to power the fuel cell BOP can be effectively avoided, but also the decoupling of power generation of the fuel cell fixed power generation system and power supply of the fuel cell BOP can be achieved, thereby effectively avoiding the problem that when the fuel cell stack or the power grid is used to power the fuel cell BOP, the fuel cell BOP is immediately powered off due to power generation / power supply failure of the fuel cell stack or the power grid, thereby causing the fuel cell to enter an emergency stop state and unable to execute processes such as stack purge, thereby reducing the life of the stack. In addition, in the process of the DC power supply system and the energy storage system being connected in parallel to power the fuel cell BOP, the output of the DC power supply system is controlled to be not lower than the output of the energy storage system. The target output voltage of the output voltage can be achieved, so that power can be supplied to the fuel cell BOP while ensuring that the remaining battery capacity of the energy storage system is maintained at the upper limit of the battery capacity. Furthermore, when the DC power supply system fails, the DC power supply system can continue to supply power to the fuel cell BOP after the DC power supply system cuts out the power supply. Moreover, the energy storage system is always connected to the power supply bus of the fuel cell BOP to continue to supply power to the fuel cell BOP from the time when the DC power supply system fails to the time when the DC power supply system cuts out the power supply. Therefore, the power supply of the fuel cell BOP is uninterrupted and does not affect the normal power generation of the fuel cell fixed power generation system. This can buy time for the power outage maintenance of the fuel cell fixed power generation system and ensure that the fuel cells in the fuel cell fixed power generation system can be shut down normally after executing the stack purge and other processes as planned, thereby reducing the number of emergency stops of the fuel cell and ensuring the service life of the fuel cell and the fuel cell fixed power generation system.

[0032] It should be noted that the "power supply failure" of the DC power supply system in this application includes system failures occurring in the DC power supply system itself, as well as failures in the power grid to which the DC power supply system is connected. As long as there are factors that may cause the DC power supply system to be unable to provide normal power supply according to the required power supply requirements, it can be considered a power supply failure of the DC power supply system.

[0033] After introducing the application scenarios and design ideas of the present application, the technical solutions provided by the present application are described in detail below.

[0034] The present application embodiment provides a fuel cell BOP power supply device, referring to Figure 1As shown, the fuel cell BOP power supply device 100 provided in the embodiment of the present application includes at least a DC power supply system 110 and an energy storage system 120; the input end of the DC power supply system 110 is connected to the power grid through an AC bus, and the power supply end of the DC power supply system 110 is connected to the power supply bus of the fuel cell BOP 131 in the fuel cell fixed power generation system 200 through a first DC bus; the first power supply end of the energy storage system 120 is connected to the power supply bus of the fuel cell BOP 131 in the fuel cell fixed power generation system 200 through a second DC bus, and the second power supply end of the energy storage system 120 is connected to the charging end of the DC power supply system 110 through a third DC bus.

[0035] In such Figure 1 In the fuel cell BOP power supply device shown, a DC power supply system 110 that draws power from a power grid and an energy storage system 120 that uses energy storage elements are connected in parallel to a power supply busbar of a fuel cell BOP 131 in a fuel cell stationary power generation system 200, forming a dual power hot backup form to supply power to the fuel cell BOP 131 in the fuel cell stationary power generation system 200, so that after the DC power supply system is cut off from power supply due to a power supply failure, the energy storage system can continue to supply power to the fuel cell BOP 131, and the energy storage system is always connected to the power supply busbar of the fuel cell BOP 131 to continue to supply power to the fuel cell BOP 131 from the time when the DC power supply system fails to the time when the DC power supply system is cut off from power supply, so that the fuel cell BOP 131 can be ensured. The power supply of 131 is uninterrupted and does not affect the normal power generation of the fuel cell fixed power generation system 200. It can not only buy time for the power outage maintenance of the fuel cell fixed power generation system 200, but also ensure that the fuel cells in the fuel cell fixed power generation system 200 can be shut down normally after executing the stack purge and other processes as planned, thereby reducing the number of emergency stops of the fuel cell and ensuring the service life of the fuel cell and the fuel cell fixed power generation system 200.

[0036] In specific implementation, in the fuel cell BOP power supply device provided in the embodiment of the present application, the DC power supply system 110 may have a variety of specific structures to realize its functions. Figure 2As shown, the DC power supply system 110 may include a power grid detection module 111, an AC / DC module 112, an energy emergency discharge module 113, a first DC voltage detection module 114, and a control module 115; the input end of the power grid detection module 111 is connected to the power grid, and the output end of the power grid detection module 111 is connected to the first input end of the control monitoring system 160 in the fuel cell stationary power generation system 200; the input end of the AC / DC module 112 is connected to the power grid, and the output end of the AC / DC module 112 is divided into two branches, one branch is connected to the power supply bus of the fuel cell BOP 131 in the fuel cell stationary power generation system 200 through the DC bus; the other branch is connected to the charging end of the energy storage system 120 through the DC bus; the energy emergency discharge module 113 is connected in parallel to the output end of the AC / DC module 112; the input end of the first DC voltage detection module 114 is connected to the output end of the AC / DC module 112, and the output end of the first DC voltage detection module 114 is connected to the second input end of the control module 115.

[0037] In such Figure 2In the fuel cell BOP power supply device shown, the power grid detection module 111 can detect the frequency, amplitude, phase and other operating status information of the current and voltage of the power grid by connecting to the power grid, and upload it to the control monitoring system 160 through the communication bus, so that the control monitoring system 160 can judge whether the power grid fails based on the frequency, amplitude, phase and other operating status information of the current and voltage of the power grid, and judge and control the operating status and output voltage of the DC power supply system 110 based on the frequency, amplitude, phase and other operating status information of the current and voltage of the power grid and in combination with the current output voltage, current output current, current SOC and other operating status information of the energy storage system 120; the AC / DC module 112 at least includes an AC / DC converter and The AC power of the AC / DC module 112 input from the power grid is converted into DC power by the AC / DC converter and filtered by the filter, and then output to the power supply bus of the fuel cell BOP in the fuel cell stationary power generation system 200 and the charging end of the energy storage system 120; the energy emergency discharge module 113 includes at least an inductor and other components, which can be connected in parallel to the output end of the AC / DC module 112 to quickly lower the output voltage of the DC power supply system 110 in an emergency such as a power grid power generation failure; the first DC voltage detection module 114 includes a voltage signal collector, which detects the output voltage of the AC / DC module 112 and then feeds it back to the control module 115 for output voltage regulation; the control module 115 can be an ASIC (Application ASIC) The control module 115 can determine whether the output voltage of the AC / DC module 112 meets the current power demand according to the output voltage of the AC / DC module 112 fed back by the first DC voltage detection module 114, and adjust the output voltage of the AC / DC module 112 accordingly according to the judgment result. The control module 115 can also receive an adjustment instruction for the output voltage of the DC power supply system 110 sent by the control monitoring system 160, and control the AC / DC module 112 to perform the precise output of the corresponding output voltage according to the adjustment instruction. The control module 115 can also receive a start-stop control instruction sent by the control monitoring system 160 and control the energy storage system 120 to perform the corresponding start-stop action, etc.

[0038] In specific implementation, in the fuel cell BOP power supply device provided in the embodiment of the present application, the energy storage system 120 may have a variety of specific structures to realize its functions. Figure 2As shown, the energy storage system 120 may include an energy storage element 121, a DC circuit protection device 122, a DC circuit closing device 123, a second DC voltage detection module 124, an energy storage management system 125 and a health detection module 126; the output end of the energy storage element 121 is connected to the DC circuit protection device 122 and the DC circuit closing device 123 in sequence, and then connected to the power supply bus of the fuel cell BOP 131 in the fuel cell fixed power generation system 200 through the DC bus; the input end of the second DC voltage detection module 124 is connected to the output end of the energy storage element 121, and the output end of the second DC voltage detection module 124 is connected to the first input end of the energy storage management system 125; the second input end of the energy storage management system 125 is connected to the output end of the health detection module 126 arranged on the energy storage element 121, and the control end of the energy storage management system 125 is connected to the enable end of the DC circuit protection device 122 and the enable end of the DC circuit closing device 123.

[0039] In such Figure 2In the fuel cell BOP power supply device shown, the energy storage system 120 can use various energy storage elements 121 such as energy storage batteries and energy storage capacitors, and the energy storage element 121 has a charge and discharge function. The energy storage element 121 that meets the voltage and power requirements of the power supply bus of the fuel cell BOP 131 can be obtained by connecting energy storage monomers of standard capacity in series and / or in parallel. The output end of each energy storage monomer in the energy storage element 121 is sequentially connected to a DC circuit protection device 122 and a DC circuit closing device 123 (for example, various power electronic switch devices) to achieve protection of the energy storage monomer; the second DC voltage detection module 124 includes a voltage signal collector, which is arranged at the output end of the energy storage element 121 and corresponds to the energy storage monomer in the energy storage element 121 one by one. The second DC voltage detection module 124 collects the current voltage of each energy storage monomer in the energy storage element 121 through the voltage signal collector. The output voltage is fed back to the energy storage management system 125 for status monitoring; the health detection module 126 includes various data collectors such as temperature signal collectors and humidity signal collectors. These data collectors can be set on the energy storage element 121 and correspond to the energy storage monomers in the energy storage element 121. The health detection module 126 can collect the current temperature, current humidity and other current status information of each energy storage monomer in the energy storage element 121 through various data collectors and then feed it back to the energy storage management system 125 for status monitoring; the energy storage management system 125 can monitor the energy storage element 121 according to the feedback of the second DC voltage detection module 124 1 and the current state information such as the current temperature and humidity of each energy storage cell in the energy storage element 121 fed back by the health detection module 126. After monitoring whether each energy storage cell in the energy storage element 121 is operating normally, the DC circuit protection device 122 and the DC circuit closing device 123 connected to the corresponding energy storage cell in the energy storage element 121 are controlled to perform corresponding opening and closing actions according to the monitoring results to realize the protection of the corresponding energy storage cell. The energy storage management system 125 can also receive the start-stop control instructions sent by the control monitoring system 160 and control the energy storage system 120 to perform corresponding start-stop actions. And upload the current output voltage, current output current, current SOC and other operating status information of the energy storage system 120 to the control monitoring system 160, so that the control monitoring system 160 monitors the operating status of the energy storage system 120 based on the current output voltage, current output current, current SOC and other operating status information of the energy storage system 120, and judges and controls the operating status and output voltage of the DC power supply system 110 based on the current output voltage, current output current, current SOC and other operating status information of the energy storage system 120 and combined with the frequency, amplitude, phase and other operating status information of the current and voltage of the power grid.

[0040] Based on the above embodiments, the present application provides a fuel cell stationary power generation system. Figure 1and Figure 2 As shown, the fuel cell stationary power generation system 200 provided in the embodiment of the present application includes at least a fuel cell 130, a grid-connected converter 140, a transformer 150, a control and monitoring system 160, and the above-mentioned fuel cell BOP power supply device 100; the primary side of the transformer 150 is connected to the power grid, the secondary side of the transformer 150 is connected to the AC side of the grid-connected converter 140, and the DC side of the grid-connected converter 140 is connected to the DC power output end of the fuel cell 130; the control and monitoring system 160 is respectively communicated with the grid-connected converter 140, the fuel cell 130, and the DC power supply system 110 and the energy storage system 120 in the fuel cell BOP power supply device 100.

[0041] In such Figure 1 and Figure 2 In the fuel cell stationary power generation system 200 shown, the fuel cell stationary power generation system 200 may include at least one set of fuel cells 130. Figure 1 and Figure 2 In the example, only a fuel cell stationary power generation system 200 including multiple sets of fuel cells 130 is taken, each set of fuel cells 130 may include a stack and the stack corresponds to a DC / DC, or may include at least two stacks connected in parallel and / or in series and the stacks connected in parallel share a DC / DC or each corresponds to a DC / DC; the DC power output by each set of fuel cells 130 is sequentially input into a grid-connected converter 140 and a transformer 150 and then connected to the power grid. When there are at least two sets of fuel cells 130, the DC power output by each set of fuel cells 130 may be connected in parallel via a DC bus and then input into a grid-connected converter 140 and then into a transformer 150, or may be input into parallel respectively. Multiple grid-connected converters 140 are then input into multiple transformers 150 in parallel; the control and monitoring system 160 can be various integrated components such as controllers, processors, single-chip microcomputers, or various programmable logic chips such as ASIC chips or FPGA chips. The control and monitoring system 160 controls the start and stop and power output of the fuel cell 130 and the grid-connected converter 140 on the one hand, and monitors the power generation status of the fuel cell 130 and the grid-connected converter 140. On the other hand, it controls the start and stop of the energy storage system 120 in the fuel cell BOP power supply device 100 and the start and stop and voltage output of the DC power supply system 110, and monitors the operating status of the DC power supply system 110 and the energy storage system 120.

[0042] In this way, by separating the electric energy of the fuel cell fixed power generation system 200 from the power grid circuit and the fuel cell BOP power supply circuit, it can be ensured that the two circuits do not affect each other, so that the fuel cell BOP power supply and the fuel cell stack power generation can be decoupled, and thus it can be effectively avoided that when the fuel cell stack or the power grid is used to power the fuel cell BOP 131, the fuel cell BOP 131 is immediately powered off due to a power generation / power supply failure of the fuel cell stack or the power grid, which then causes the fuel cell to enter an emergency stop state and cannot perform processes such as stack purge, thereby reducing the life of the stack, thereby improving the safety of the operation of the fuel cell stack power generation part and the fuel cell BOP power supply part of the fuel cell fixed power generation system. In addition, the fuel cell BOP power supply device 100 in the fuel cell fixed power generation system 200 supplies power to the fuel cell BOP 131 in the form of dual power hot backup formed by the DC power supply system 110 and the energy storage system 120. After it is determined that a power supply failure occurs in the DC power supply system 110 and the DC power supply system 110 is cut off, the fuel cell BOP is continuously supplied by the energy storage system 120. 131 is powered, and the energy storage system 120 is always connected to the power supply bus of the fuel cell BOP 131 to continuously supply power to the fuel cell BOP 131 from the time when the DC power supply system 110 fails to the time when the DC power supply system 110 cuts off the power supply, thereby ensuring that the power supply of the fuel cell BOP 131 is uninterrupted and does not affect the normal power generation of the fuel cell fixed power generation system 200, which can not only buy time for the power outage maintenance of the fuel cell fixed power generation system 200, but also ensure that the fuel cell 130 in the fuel cell fixed power generation system 200 can be shut down normally after executing the processes such as stack purge as planned, thereby reducing the number of emergency stops of the fuel cell 130 and ensuring the service life of the fuel cell 130 and the fuel cell fixed power generation system 200.

[0043] Based on the above embodiments, the present application provides a fuel cell BOP power supply control method, which is applied to Figure 1 and Figure 2 The control and monitoring system 160 in the fuel cell stationary power generation system 200 shown in FIG. Figure 3 As shown, the overview process of the fuel cell BOP power supply control method provided in the embodiment of the present application is as follows:

[0044] Step 301: while the DC power system 110 and the energy storage system 120 in the fuel cell BOP power supply device 100 are connected in parallel to supply power to the fuel cell BOP 131 in the fuel cell stationary power generation system 200, the current SOC of the energy storage system 120 is obtained.

[0045] In practical applications, when the fuel cell stationary power generation system 200 is started, when the power grid and the DC power system 110 are normal, the control and monitoring system 160 can control the DC power system 110 and the energy storage system 120 to be connected in parallel to supply power to the fuel cell BOP 131 in the fuel cell stationary power generation system 200, which can be specifically adopted but not limited to the following methods:

[0046] First, the control monitoring system 160 sends a startup instruction to the control module 115 in the DC power supply system 110 and the energy storage management system 125 in the energy storage system 120 , respectively, to control the startup of the DC power supply system 110 and the energy storage system 120 .

[0047] Then, the control monitoring system 160 obtains the current output voltage of the energy storage system 120 , the frequency, amplitude, phase and other operating status information of the voltage output by the power grid, and the operating status information of the DC power supply system 110 .

[0048] Specifically, in one embodiment, after the energy storage system 120 is started, the second DC voltage detection module 124 in the energy storage system 120 can automatically feed back the current output voltage of the energy storage system 120 to the control monitoring system 160 through the energy storage management system 125. At the same time, after the DC power supply system 110 is started, the grid detection module 111 and the first DC voltage detection module 114 in the DC power supply system 110 will also automatically feed back the frequency, amplitude, phase and other operating status information of the voltage output by the grid and the operating status information of the DC power supply system 110 itself to the control monitoring system 160, so that the control monitoring system 160 can obtain the current output voltage of the energy storage system 120 and the frequency, amplitude, phase and other operating status information of the voltage output by the grid. The control monitoring system 160 controls the DC power supply system 110 and the energy storage system 120 to start, and can send a status acquisition instruction to the energy storage management system 125 in the energy storage system 120 to forward the current output voltage of the energy storage system 120 detected by the second DC voltage detection module 124 through the energy storage management system 125 in the energy storage system 120, and send a status acquisition instruction to the power grid detection module 111 and the first DC voltage detection module 114 in the DC power supply system 110 to obtain the frequency, amplitude, phase and other operating status information of the voltage output by the power grid and the operating status information of the DC power supply system 110 itself.

[0049] Finally, the control and monitoring system 160 determines the gradual voltage increase strategy of the DC power system 110 (for example, gradually increasing the voltage according to the target slope) according to the operating status information of the voltage output by the power grid, such as the frequency, amplitude, and phase, the operating status information of the DC power system 110 itself, and the current output voltage of the energy storage system 120, and sends a voltage increase cut-in instruction carrying the gradual voltage increase strategy to the control module 115 in the DC power system 110, so that the control module 115 determines that the output voltage of the DC power system 110 gradually increases to the current output voltage of the energy storage system 120, and then controls the connection between the power supply end of the DC power system 110 and the power supply bus of the fuel cell BOP 131, so that the DC power system 110 cuts in to power supply, thereby connecting in parallel with the energy storage system 120 to power the fuel cell BOP 131.

[0050] Further, in the process of the DC power supply system 110 and the energy storage system 120 being connected in parallel to supply power to the fuel cell BOP 131, the control monitoring system 160 can obtain the current SOC of the energy storage system 120 for state monitoring and / or voltage control. Specifically, in one embodiment, the energy storage management system 125 in the energy storage system 120 can periodically feed back the current SOC, current output voltage, current temperature, current humidity and other operating state information of the energy storage system 120 to the control monitoring system 160, so that the control monitoring system 160 can periodically obtain the current SOC, current output voltage, current temperature, current humidity and other operating state information of the energy storage system 120; in another embodiment, the control monitoring system 160 can periodically send a state acquisition instruction to the energy storage management system 125 in the energy storage system 120, so as to obtain the current SOC, current output voltage, current temperature, current humidity and other operating state information of the energy storage system 120 through the energy storage management system 125 in the energy storage system 120 for state monitoring and / or voltage control.

[0051] Step 302 : Based on the current SOC of the energy storage system 120 , determine the target output voltage of the DC power system 110 , and control the DC power system 110 to output the target output voltage; wherein the target output voltage of the DC power system 110 is not lower than the current output voltage of the energy storage system 120 .

[0052] In practical applications, after the control monitoring system 160 obtains the current SOC, current output voltage and other operating status information of the energy storage system 120, it determines the target output voltage of the DC power supply system 110 based on the current SOC of the energy storage system 120, and controls the DC power supply system 110 to output the target output voltage. There may be but are not limited to the following situations:

[0053] The first case: when the control and monitoring system 160 determines that the current SOC of the energy storage system 120 is lower than the lower limit of the remaining capacity (for example, 20%), the DC power system 110 can be controlled to output a target output voltage higher than the current output voltage of the energy storage system 120, so that the DC power system 110 supplies power to the fuel cell BOP 131 and charges the energy storage system 120. Specifically, the control and monitoring system 160 can send a voltage control instruction to the control module 115 in the DC power system 110, so that the control module 115 in the DC power system 110 controls the AC / DC module 112 to output a target output voltage higher than the current output voltage of the energy storage system 120, so that the DC power system 110 supplies power to the fuel cell BOP 131 and charges the energy storage system 120; wherein, the flow of electric energy when the DC power system 110 supplies power to the fuel cell BOP 131 and charges the energy storage system 120 is as follows: Figure 4 shown.

[0054] The second case: when the control monitoring system 160 determines that the current SOC of the energy storage system 120 is not lower than the lower limit of the remaining capacity (e.g., 20%), the DC power system 110 is controlled to output a target output voltage equal to the current output voltage of the energy storage system 120, so that the DC power system 110 supplies power to the fuel cell BOP 131 and float charges the energy storage system 120. Specifically, the control monitoring system 160 may send a voltage maintenance instruction to the control module 115 in the DC power system 110, so that the control module 115 in the DC power system 110 controls the AC / DC module 112 to continue to output a target output voltage equal to the current output voltage of the energy storage system 120, so that the DC power system 110 supplies power to the fuel cell BOP 131 and float charges the energy storage system 120. Of course, the control and monitoring system 160 may not send a voltage maintenance instruction to the control module 115 in the DC power supply system 110. When the control module 115 in the DC power supply system 110 does not receive a voltage regulation instruction issued by the control and monitoring system 160 within a set time range, the AC / DC module 112 continues to output a target output voltage equal to the current output voltage of the energy storage system 120 by default, and no control processing is performed on the AC / DC module 112.

[0055] Step 303 : When it is determined that a power supply failure occurs in the DC power supply system 110 , control to disconnect the power supply terminal of the DC power supply system 110 from the power supply bus of the fuel cell BOP 131 .

[0056] In actual applications, the control and monitoring system 160 can periodically obtain the operating status information such as the frequency, amplitude, phase, etc. of the voltage output by the power grid and the operating status information of the DC power supply system 110 itself, and based on the operating status information such as the frequency, amplitude, phase, etc. of the voltage output by the power grid and the operating status information of the DC power supply system 110 itself, detect whether the power grid and the DC power supply system 110 have failed, and when it is determined that the power grid and / or the DC power supply system 110 have failed, it is determined that a power supply failure has occurred in the DC power supply system 110. At this time, the control and monitoring system 160 can control the disconnection between the power supply end of the DC power supply system 110 and the power supply bus of the fuel cell BOP 131. Specifically, a power supply cut-off instruction can be sent to the control module 115 in the DC power supply system 110, so that the control module 115 controls the AC / DC module 112 to shut down and controls the energy emergency discharge module 113 to quickly pull down the output voltage of the DC power supply system 110 to a set value (for example, 0), and then controls the power supply end of the DC power supply system 110 to disconnect the power supply bus of the fuel cell BOP 131. The connection between the power supply busbars 131 is disconnected, so that the DC power supply system 110 cuts off the power supply. At this time, the energy storage system 120 continues to supply power to the fuel cell BOP 131, thereby ensuring that the power supply of the fuel cell BOP 131 is uninterrupted and does not affect the normal power generation of the fuel cell fixed power generation system 200. It can not only buy time for the power outage maintenance of the fuel cell fixed power generation system 200, but also ensure that the fuel cells in the fuel cell fixed power generation system 200 can be shut down normally after executing the stack purge and other processes as planned, thereby reducing the number of emergency stops of the fuel cell and ensuring the service life of the fuel cell and the fuel cell fixed power generation system 200; wherein, the power flow mode when the energy storage system 120 supplies power to the fuel cell BOP 131 is as follows: Figure 5 shown.

[0057] Furthermore, the following uses the power grid as an example to explain that when a power grid failure occurs, the control and monitoring system 160 can control the fuel cell 130 to reversely supply electricity to the power grid and the energy storage system 120 to solve the power grid power demand and the energy storage system 120 charging demand problems during power grid maintenance. Specifically, the control and monitoring system 160 can send a reverse power instruction to the fuel cell BOP 131 in the fuel cell 130 to enable the fuel cell 130 to reversely supply electricity to the power grid and the energy storage system 120. Of course, when the auxiliary equipment of the power grid needs to be operated before the power grid generates electricity, and when the excitation of the generator in the fuel cell BOP 131 needs to be adjusted to achieve system synchronization during the power generation process of the power grid and the fuel cell fixed power generation system 200, the control and monitoring system 160 also needs to control the fuel cell 130 to reversely supply electricity to the power grid and the energy storage system 120; wherein, the flow mode of electric energy when the fuel cell 130 reverses power is as follows: Figure 6 shown.

[0058] Furthermore, when the power grid maintenance is completed and normal power generation is possible, when the control and monitoring system 160 determines that the power grid has returned to normal, the connection between the power supply end of the DC power supply system 110 and the power supply bus of the fuel cell BOP 131 is restored, and the DC power supply system 110 is controlled to output a target output voltage higher than the current output voltage of the energy storage system 120, so that the DC power supply system 110 supplies power to the fuel cell BOP 131 and charges the energy storage system 120. When it is further determined that the current SOC of the energy storage system 120 reaches the upper limit of the battery capacity, the DC power supply system 110 is controlled to output a target output voltage equal to the current output voltage of the energy storage system 120, so that the DC power supply system 110 supplies power to the fuel cell BOP 131 and float charges the energy storage system 120. The control method of the control and monitoring system 160 on the DC power supply system 110 is similar to that described above and will not be repeated here.

[0059] Based on the above embodiments, the present application provides a fuel cell BOP power supply control device, referring to Figure 7 As shown, the fuel cell BOP power supply control device 400 provided in the embodiment of the present application at least includes:

[0060] The information acquisition unit 701 is used to acquire the current SOC of the energy storage system 120 in the process where the DC power system 110 and the energy storage system 120 in the fuel cell BOP power supply device 100 are connected in parallel to supply power to the fuel cell BOP 131 in the fuel cell stationary power generation system 200;

[0061] A first control unit 702 is used to determine a target output voltage of the DC power system 110 based on the current SOC of the energy storage system 120, and control the DC power system 110 to output the target output voltage; wherein the target output voltage of the DC power system 110 is not lower than the current output voltage of the energy storage system 120;

[0062] The second control unit 703 is used to control the disconnection between the power supply end of the DC power supply system 110 and the power supply bus of the fuel cell BOP 131 when it is determined that a power supply failure occurs in the DC power supply system 110 .

[0063] In a possible implementation, the fuel cell BOP power supply control device 700 provided in the embodiment of the present application further includes:

[0064] The third control unit 704 is used to control the start-up of the DC power supply system 110 and the energy storage system 120 when the fuel cell stationary power generation system 200 is started, and detect the current output voltage of the energy storage system 120; after controlling the output voltage of the DC power supply system 110 to gradually increase to the current output voltage of the energy storage system 120, control the connection between the power supply end of the DC power supply system 110 and the power supply bus of the fuel cell BOP 131.

[0065] In a possible implementation, when determining the target output voltage of the DC power system 110 based on the current SOC of the energy storage system 120 and controlling the DC power system 110 to output the target output voltage, the first control unit 702 is specifically used to:

[0066] When it is determined that the current SOC of the energy storage system 120 is lower than the lower limit of the remaining capacity, the DC power system 110 is controlled to output a target output voltage higher than the current output voltage of the energy storage system 120, so that the DC power system 110 supplies power to the fuel cell BOP131 and charges the energy storage system 120;

[0067] When it is determined that the current SOC of the energy storage system 120 is not lower than the lower limit of the remaining capacity, the DC power system 110 is controlled to output a target output voltage equal to the current output voltage of the energy storage system 120, so that the DC power system 110 supplies power to the fuel cell BOP131 and float charges the energy storage system 120.

[0068] In a possible implementation, the fuel cell BOP power supply control device 700 provided in the embodiment of the present application further includes:

[0069] The fourth control unit 705 is used to control the restoration of the connection between the power supply end of the DC power supply system 110 and the power supply bus of the fuel cell BOP 131 when it is determined that the DC power supply system 110 has restored power supply to normal, and control the DC power supply system 110 to output a target output voltage higher than the current output voltage of the energy storage system 120, so that the DC power supply system 110 can supply power to the fuel cell BOP 131 and charge the energy storage system 120; when it is determined that the current SOC of the energy storage system 120 has reached the upper limit of the battery capacity, control the DC power supply system 110 to output a target output voltage equal to the current output voltage of the energy storage system 120, so that the DC power supply system 110 can supply power to the fuel cell BOP 131 and float charge the energy storage system 120.

[0070] After introducing the fuel cell BOP power supply device, fuel cell fixed power generation system, fuel cell BOP power supply control method and device provided in the embodiments of the present application, the fuel cell BOP power supply control device provided in the embodiments of the present application is briefly introduced next.

[0071] See also Figure 8 As shown, the fuel cell BOP power supply control device 800 provided in the embodiment of the present application includes at least a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the processor 801 executes the computer program, the fuel cell BOP power supply control method provided in the embodiment of the present application is implemented.

[0072] The fuel cell BOP power supply control device 800 provided in the embodiment of the present application may also include a bus 803 connecting different components (including the processor 801 and the memory 802). The bus 803 represents one or more of several types of bus structures, including a memory bus, a peripheral bus, a local bus, and the like.

[0073] The memory 802 may include a readable medium in the form of a volatile memory, such as a RAM (Random Access Memory) 8021 and / or a cache memory 8022, and may further include a ROM (Read Only Memory) 8023. The memory 802 may also include a program tool 8025 having a group (at least one) of program modules 8024, and the program modules 8024 include but are not limited to: an operating subsystem, one or more application programs, other program modules, and program data, each of which or some combination may include the implementation of a network environment.

[0074] The fuel cell BOP power supply control device 800 can also communicate with one or more external devices 804 (such as keyboards, remote controls, etc.), and can also communicate with one or more devices that enable users to interact with the fuel cell BOP power supply control device 800 (such as mobile phones, computers, etc.), and / or, communicate with any device that enables the fuel cell BOP power supply control device 800 to communicate with one or more other fuel cell BOP power supply control devices 800 (such as routers, modems, etc.). Such communication can be carried out through the I / O (Input / Output) interface 805. In addition, the fuel cell BOP power supply control device 800 can also communicate with one or more networks (such as LAN (Local Area Network), WAN (Wide Area Network) and / or public networks, such as the Internet) through a network adapter 806. Figure 8 As shown, the network adapter 806 communicates with other modules of the fuel cell BOP power supply control device 800 through the bus 803. It should be understood that although Figure 8 Not shown, other hardware and / or software modules may be used in conjunction with the fuel cell BOP power supply control device 800, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (Redundant Arrays of Independent Disks) subsystems, tape drives, and data backup storage subsystems.

[0075] It should be noted that Figure 8The fuel cell BOP power supply control device 800 shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0076] In addition, the embodiment of the present application further provides a computer-readable storage medium, which stores computer instructions, and when the computer instructions are executed by the processor, the fuel cell BOP power supply control method provided in the embodiment of the present application is implemented. Specifically, the computer instructions can be built into the processor, so that the processor implements the fuel cell BOP power supply control method provided in the embodiment of the present application by executing the built-in computer instructions.

[0077] In addition, the fuel cell BOP power supply control method provided in the embodiment of the present application can also be implemented as a program product, which includes a program code, and when the program code is executed by a processor, the fuel cell BOP power supply control method provided in the embodiment of the present application is implemented.

[0078] The program product provided in the embodiments of the present application may adopt any combination of one or more readable media, which may be a readable signal medium or a readable storage medium, and the readable storage medium may be but is not limited to an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. Specifically, more specific examples of readable storage media (a non-exhaustive list) include: an electrical connection with one or more wires, a portable disk, a hard disk, RAM, ROM, EPROM (Erasable Programmable Read Only Memory), optical fiber, CD-ROM (Compact Disc Read-Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0079] The program product provided in the embodiment of the present application may adopt a CD-ROM and include program code, and may also be run on a processor. However, the program product provided in the embodiment of the present application is not limited thereto. In the embodiment of the present application, the readable storage medium may be any tangible medium containing or storing a program, and the program may be used by or in combination with an instruction execution system, apparatus, or device.

[0080] It should be noted that, although several units or subunits of the device are mentioned in the above detailed description, this division is merely exemplary and not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided into multiple units to be embodied.

[0081] In addition, although the operations of the method of the present application are described in a specific order in the drawings, this does not require or imply that the operations must be performed in this specific order, or that all the operations shown must be performed to achieve the desired results. Additionally or alternatively, some steps may be omitted, multiple steps may be combined into one step, and / or one step may be decomposed into multiple steps.

[0082] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they are aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0083] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A fuel cell BOP power supply device, characterized in that: It includes a DC power supply system and an energy storage system; the input end of the DC power supply system is connected to the power grid through an AC bus, and the power supply end of the DC power supply system is connected to the power supply bus of the fuel cell BOP in the fuel cell fixed power generation system through a first DC bus; the first power supply end of the energy storage system is connected to the power supply bus of the fuel cell BOP in the fuel cell fixed power generation system through a second DC bus, and the second power supply end of the energy storage system is connected to the charging end of the DC power supply system through a third DC bus.

2. The fuel cell BOP power supply device according to claim 1, characterized in that: The DC power supply system includes a power grid detection module, an AC / DC module, an energy emergency discharge module, a first DC voltage detection module, and a control module; the input end of the power grid detection module is connected to the power grid, and the output end of the power grid detection module is connected to the first input end of the control module; the input end of the AC / DC module is connected to the power grid, and the output end of the AC / DC module is divided into two branches, one branch is connected to the power supply bus of the fuel cell BOP in the fuel cell fixed power generation system through a DC bus; the other branch is connected to the charging end of the energy storage system through a DC bus; the energy emergency discharge module is connected in parallel to the output end of the AC / DC module; the input end of the first DC voltage detection module is connected to the output end of the AC / DC module, and the output end of the first DC voltage detection module is connected to the second input end of the control module.

3. The fuel cell BOP power supply device according to claim 1 or 2, characterized in that: The energy storage system includes an energy storage element, a DC circuit protection device, a DC circuit closing device, a second DC voltage detection module, an energy storage management system and a health detection module; the output end of the energy storage element is connected to the DC circuit protection device and the DC circuit closing device in sequence, and then connected to the power supply bus of the fuel cell BOP in the fuel cell fixed power generation system through a DC bus; the input end of the second DC voltage detection module is connected to the output end of the energy storage element, and the output end of the second DC voltage detection module is connected to the first input end of the energy storage management system; the second input end of the energy storage management system is connected to the output end of the health detection module arranged on the energy storage element, and the control end of the energy storage management system is connected to the enable end of the DC circuit protection device and the enable end of the DC circuit closing device.

4. A fuel cell stationary power generation system, characterized in that: It includes a fuel cell, a grid-connected converter, a transformer, a control and monitoring system, and a fuel cell BOP power supply device as described in any one of claims 1 to 3; the primary side of the transformer is connected to the power grid, the secondary side of the transformer is connected to the AC side of the grid-connected converter, and the DC side of the grid-connected converter is connected to the DC power output end of the fuel cell; the control and monitoring system is respectively communicated with the grid-connected converter, the fuel cell, and the energy storage system and DC power supply system in the fuel cell BOP power supply device.

5. A fuel cell BOP power supply control method, characterized in that: The control and monitoring system used in the fuel cell stationary power generation system as claimed in claim 4 comprises: In the process of the energy storage system and the DC power supply system in the fuel cell BOP power supply device being connected in parallel to supply power to the fuel cell BOP in the fuel cell stationary power generation system, obtaining the current battery remaining capacity SOC of the energy storage system; Based on the current SOC of the energy storage system, determine the target output voltage of the DC power supply system, and control the DC power supply system to output the target output voltage; wherein the target output voltage of the DC power supply system is not lower than the current output voltage of the energy storage system; When it is determined that a power supply failure occurs in the DC power supply system, control is performed to disconnect the connection between the power supply end of the DC power supply system and the power supply bus of the fuel cell BOP.

6. The fuel cell BOP power supply control method according to claim 5, characterized in that: Determining a target output voltage of the DC power supply system based on a current SOC of the energy storage system, and controlling the DC power supply system to output the target output voltage, comprising: When it is determined that the current SOC of the energy storage system is lower than the lower limit of the remaining capacity, the DC power supply system is controlled to output a target output voltage higher than the current output voltage of the energy storage system, so that the DC power supply system supplies power to the fuel cell BOP and charges the energy storage system; When it is determined that the current SOC of the energy storage system is not lower than the lower limit of the remaining capacity, the DC power supply system is controlled to output a target output voltage equal to the current output voltage of the energy storage system, so that the DC power supply system supplies power to the fuel cell BOP and float charges the energy storage system.

7. The fuel cell BOP power supply control method according to claim 5, characterized in that: Before the energy storage system and the DC power supply system in the fuel cell BOP power supply device are connected in parallel to supply power to the fuel cell BOP in the fuel cell stationary power generation system, the method further includes: When the fuel cell stationary power generation system is started, controlling the energy storage system and the DC power supply system to start, and detecting the current output voltage of the energy storage system; After controlling the output voltage of the DC power supply system to gradually increase to the current output voltage of the energy storage system, controlling the connection between the power supply end of the DC power supply system and the power supply bus of the fuel cell BOP is turned on.

8. The fuel cell BOP power supply control method according to any one of claims 5 to 7, characterized in that: After controlling to disconnect the connection between the power supply end of the DC power supply system and the power supply bus of the fuel cell BOP, the method further includes: When it is determined that the DC power supply system has restored power supply to normal, control to restore the connection between the power supply end of the DC power supply system and the power supply bus of the fuel cell BOP, and control the DC power supply system to output a target output voltage higher than the current output voltage of the energy storage system, so that the DC power supply system supplies power to the fuel cell BOP and charges the energy storage system; When it is determined that the current SOC of the energy storage system reaches the upper limit of the battery capacity, the DC power supply system is controlled to output a target output voltage equal to the current output voltage of the energy storage system, so that the DC power supply system supplies power to the fuel cell BOP and float charges the energy storage system.

9. A fuel cell BOP power supply control device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the fuel cell BOP power supply control method as claimed in any one of claims 5 to 8 when executing the computer program.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the fuel cell BOP power supply control method according to any one of claims 5 to 8 is implemented.

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