Fuel cell power generation system and control method thereof

Abstract

The application provides a fuel cell power generation system and a control method thereof, the power generation system comprising a fuel cell system, an inverter power supply and an energy storage system, the direct current side of the inverter power supply being connected with the fuel cell system through a direct current bus, the alternating current side of the inverter power supply being connected with an external alternating current system, and the energy storage system being connected to the direct current bus. The control method comprises: in response to the operation of closing a feed-in system switch between the alternating current side of the inverter power supply and the external alternating current system, starting the energy storage system and instructing it to enter a voltage stabilizing mode; starting the fuel cell system, controlling the energy storage system and the fuel cell system to form a loop so that the direct current bus voltage is clamped in a preset range; monitoring the direct current bus voltage, starting the inverter power supply and regulating the power generation system to supply power to the external alternating current system when the direct current bus voltage reaches the preset range. The application solves the problem of large energy loss and waste of energy caused by the current scheme for coping with high open circuit voltage of the fuel cell.

Description

Technical Field

[0001] This invention relates to the field of fuel cell power generation technology, and in particular to a fuel cell power generation system and its control method. Background Technology

[0002] With the rapid development of the global new energy industry, some new types of fuel cells (such as hydrogen fuel cells) have shown broad application prospects in scenarios such as power grid peak shaving and valley filling, and emergency backup power.

[0003] However, fuel cells have the following problems in application: the open-circuit voltage of a fuel cell is relatively high when it is not under load or when no load is connected, but the voltage drops rapidly when it is generating electricity under normal load. For example, the open-circuit voltage of a PEMFC (Proton Exchange Membrane Fuel Cell) in hydrogen fuel cells can reach 1.0~1.2V / cell, but drops to 0.65~0.75V / cell under normal load. Another example is the SOFC (Solid Oxide Fuel Cell), whose open-circuit voltage can reach 1.1V / cell, but drops to 0.75~0.85V / cell under normal load.

[0004] To address the high open-circuit voltage characteristic of fuel cells, the current mainstream solution is to select the voltage rating of power devices in the downstream converter design based on the high open-circuit voltage of the fuel cell to ensure system startup safety. However, higher voltage-rated power devices are usually accompanied by greater on-resistance and switching losses, leading to a core contradiction: to cope with the brief high open-circuit voltage during fuel cell startup, the downstream converter must use high-loss, high-voltage devices. During most of the system's normal operation, the actual operating voltage of the fuel cell is far lower than the high open-circuit voltage, resulting in reduced conversion efficiency of the converter using high-voltage devices during normal operation and causing unnecessary energy loss.

[0005] Therefore, in the existing technology, in order to deal with the problem of high open-circuit voltage of fuel cells, power devices are usually selected with reference to the high open-circuit voltage value of fuel cells when designing converter equipment. However, this solution will lead to large system energy loss and a lot of energy waste. Summary of the Invention

[0006] In view of this, the present invention provides a fuel cell power generation system and its control method, which solves the problem that the current solutions used to deal with the high open-circuit voltage of fuel cells lead to large system energy loss and a lot of energy waste.

[0007] This application provides a fuel cell power generation system and its control method, among other embodiments. The following description covers various aspects, and the embodiments and beneficial effects described herein can be referenced interchangeably.

[0008] In a first aspect, the present invention provides a control method for a fuel cell power generation system, applicable to a fuel cell power generation system comprising a fuel cell system, an inverter, and an energy storage system. The DC side of the inverter is connected to the fuel cell system via a DC bus, the AC side of the inverter is connected to a load and the power grid, and the energy storage system is connected to the DC bus between the fuel cell system and the inverter.

[0009] The control method includes the following steps: First, in response to the closing of the feed-in system switch, the energy storage system is started and instructed to enter a voltage regulation mode; wherein, the feed-in system switch is located between the AC side of the inverter power supply and the external AC system. Next, the fuel cell system is started, and the energy storage system and the fuel cell system are controlled to form a loop so that the DC bus voltage is clamped within a preset range. Finally, the DC bus voltage is monitored; when the DC bus voltage reaches the preset range, the inverter power supply is started, and the fuel cell power generation system is regulated to supply power to the external AC system.

[0010] In one possible implementation of the first aspect above, when the DC bus voltage reaches a preset range, the inverter power supply is started, including the following steps: when the DC bus voltage stabilizes to a preset start-up voltage value, the inverter power supply is started, wherein the preset start-up voltage value is a voltage value within the preset range.

[0011] In one possible implementation of the first aspect above, regulating the fuel cell power generation system to supply power to an external AC system includes the following steps:

[0012] First, confirm the system operation mode of the fuel cell power generation system; the system operation modes include grid-connected operation and islanded operation.

[0013] Subsequently, based on the system operation mode of the fuel cell power generation system, an output mode control command is generated; wherein, the output mode control command is used to instruct the energy output mode of the energy storage system.

[0014] Next, the target output power and actual output power of the inverter are determined. The output power difference is calculated based on these two values, and a power adjustment command is generated based on this difference.

[0015] Finally, based on the output mode control command and power adjustment command, the energy storage system is controlled to adjust the output power so that the actual output power of the inverter is adjusted to the target output power value.

[0016] In one possible implementation of the first aspect above, generating output mode control commands based on the system operation mode of the fuel cell power generation system includes the following steps:

[0017] When the fuel cell power generation system operates in grid-connected mode, a first output mode control command is generated; wherein, the first output mode control command is used to instruct the energy storage system to output energy in accordance with the voltage and frequency of the power grid in the external AC system.

[0018] In one possible implementation of the first aspect above, generating output mode control commands based on the system operation mode of the fuel cell power generation system includes the following steps:

[0019] When the fuel cell power generation system operates in islanded mode, a second output mode control command is generated; the second output mode control command is used to instruct the energy storage system to output energy according to the set voltage and frequency.

[0020] In one possible implementation of the first aspect described above, the fuel cell power generation system includes multiple fuel cell power generation systems connected in parallel.

[0021] Secondly, this application provides a fuel cell power generation system, which includes a fuel cell system, an inverter, an energy storage system, and an energy management system.

[0022] In this system, the DC side of the inverter is connected to the fuel cell system via a DC bus, and the AC side of the inverter is connected to an external AC system. An energy storage system is connected to the DC bus between the fuel cell system and the inverter. The energy management system is used to execute the control method for the fuel cell power generation system disclosed in the first aspect and any possible implementation thereof.

[0023] Thirdly, this application provides a control device for a fuel cell power generation system. It is applied to a fuel cell power generation system, which includes a fuel cell system, an inverter, and an energy storage system. The DC side of the inverter is connected to the fuel cell system via a DC bus, and the AC side of the inverter is connected to an external AC system. The energy storage system is connected to the DC bus between the fuel cell system and the inverter.

[0024] The control device includes an energy storage system startup module, a fuel cell system startup module, and an inverter startup and power supply regulation module. The energy storage system startup module starts the energy storage system in response to the closing of the feed-in system switch and instructs the energy storage system to enter a voltage regulation mode; the feed-in system switch is located between the AC side of the inverter and the external AC system. The fuel cell system startup module starts the fuel cell system and controls the energy storage system and fuel cell system to form a circuit, clamping the DC bus voltage within a preset range. The inverter startup and power supply regulation module monitors the DC bus voltage; when the DC bus voltage reaches the preset range, it starts the inverter and regulates the fuel cell power generation system to supply power to the external AC system.

[0025] Fourthly, this application provides an electronic device. The electronic device includes a processor and a memory, the memory storing at least one instruction or at least one program segment, which is loaded and executed by the processor to implement the control method for a fuel cell power generation system disclosed in the first aspect and any possible implementation thereof.

[0026] Fifthly, this application provides a computer-readable storage medium storing at least one instruction or at least one program, wherein the at least one instruction or at least one program is loaded and executed by a processor to implement the control method of the fuel cell power generation system disclosed in the first aspect and any possible implementation thereof.

[0027] The above-described technical solution of the present invention has at least one of the following beneficial effects:

[0028] The system structure incorporates an energy storage system. In terms of control, the energy storage system is pre-started and instructed to enter voltage regulation mode before the inverter is started. Then, the fuel cell system is started. At this point, the energy storage system can act as a load, forming a loop with the fuel cell system. This can be understood as the fuel cell system entering a load-generating state immediately upon startup, with its output voltage being a normal load voltage, not an open-circuit voltage. Finally, when the energy management system detects that the DC bus voltage is clamped within a safe preset range, it indicates that the fuel cell system and the energy storage system have successfully established a connection and formed a loop, and the DC bus voltage has stabilized at a normal voltage level. At this point, starting the inverter will not cause any impact on the DC bus voltage.

[0029] By controlling the startup timing of each module, the high open-circuit voltage problem of the fuel cell system is avoided. The inverter can be designed according to the normal operating voltage of the fuel cell system rather than the maximum open-circuit voltage. This allows for the selection of power devices with lower withstand voltage ratings, lower on-resistance, faster switching speeds, and significantly lower losses. The inverter can always operate within the optimal efficiency range of the power devices, minimizing unnecessary energy loss and waste in the entire fuel cell power generation system. This effectively solves the problem of high energy loss and waste caused by current solutions for dealing with high open-circuit voltage in fuel cells. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a fuel cell power generation system according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic flowchart of a control method for a fuel cell power generation system according to an embodiment of the present invention;

[0032] Figure 3 This is another schematic flowchart of the control method of the fuel cell power generation system in one embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of a fuel cell power generation system according to another embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the control device of a fuel cell power generation system according to an embodiment of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of an electronic device according to an embodiment of the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of Soc in one embodiment of the present invention. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the existing technology, in order to deal with the problem of high open-circuit voltage of fuel cells, the common solution is to select power devices with reference to the high open-circuit voltage value of fuel cells when designing converter equipment. However, this solution will lead to large system energy loss and a lot of energy waste.

[0039] In view of this, embodiments of this application provide a fuel cell power generation system and its control method. In terms of system structure, an energy storage system is added and connected to the DC bus between the fuel cell system and the inverter power supply. In terms of control method, the energy storage system is pre-started before the inverter power supply of the system, allowing it to form a circuit with the fuel cell system. This clamps the DC bus voltage within a preset range, avoiding the problem of high open-circuit voltage in the fuel cell. Furthermore, it avoids unnecessary energy loss and is less likely to affect the conversion efficiency of fuel cell power generation.

[0040] The fuel cell power generation system and control method of this application will be described below with reference to specific embodiments and accompanying drawings.

[0041] First, let's introduce the structure of the fuel cell power generation system.

[0042] Figure 1 A schematic diagram of a fuel cell power generation system structure in one embodiment is shown, as follows: Figure 1 As shown, the fuel cell power generation system includes a fuel cell system, an inverter, and an energy storage system.

[0043] The inverter's DC side is connected to the fuel cell system via a DC bus, while its AC side is connected to an external AC system. The energy storage system is connected to the DC bus between the fuel cell system and the inverter.

[0044] Specifically, such as Figure 1 As shown, the external AC system may include the power grid and the load. The AC side of the inverter is connected to the external AC system through the feed-in system switch. That is, the AC side of the inverter is connected to both the power grid and the load through the feed-in system switch.

[0045] The following is a detailed description of each module in the fuel cell power generation system.

[0046] like Figure 1 As shown, the energy storage system may specifically include a battery, a power conversion system (PCS), a battery management system (BMS), and a DC / DC converter. The PCS receives commands from higher levels and controls the charging and discharging of the energy storage system. The BMS collects relevant battery information and transmits it to the PCS, and can also receive commands from the PCS. The battery can be an electrochemical energy storage device or a supercapacitor. The DC / DC converter has bidirectional power flow characteristics and can adopt an isolated or non-isolated DC / DC topology; this application does not specifically limit these aspects.

[0047] The fuel cell system can be a hydrogen fuel cell system, which directly converts the chemical energy of hydrogen and oxygen into electrical energy. It may include a hydrogen fuel cell stack, a hydrogen supply system, an oxygen supply system, a thermal management system, a water management system, a safety auxiliary system, etc. The capacity and output voltage of the fuel cell system can be designed as needed, and the embodiments of this application do not specifically limit them.

[0048] The inverter power supply is a DC / AC inverter power supply based on fully controllable power electronic devices such as IGBTs (Insulated Gate Bipolar Transistors) and SiC (Silicon Carbide). It can adopt a two-level, three-level, or modular multi-level topology, and this application does not specifically limit this. In addition, the inverter power supply can also use switching devices with high overload capacity, and by simulating the external characteristics of a synchronous generator, it can inject inertial support and damping characteristics into the power system, effectively cope with complex power grid environments, and enhance system stability.

[0049] The power grid specifically refers to the AC power grid, and the load can include only one electrical load or be a collective term for multiple electrical loads.

[0050] like Figure 1 As shown, the fuel cell power generation system may also include an energy management system. This system can macroscopically regulate the fuel cell power generation system, controlling its power supply to the external AC system. Furthermore, the energy management system can be connected to various modules and nodes within the fuel cell power generation system via communication lines, enabling intelligent data acquisition, analysis, and control of the system's data.

[0051] The following example uses an energy management system as the executing entity of the control method to illustrate the control method based on this fuel cell power generation system.

[0052] like Figure 2 As shown, the control method includes the following steps:

[0053] In step S100, in response to the operation of closing the feed system switch, the energy storage system is started and instructed to enter the voltage regulation mode.

[0054] The feed-in system switch is located between the AC side of the inverter power supply and the external AC system. Closing the feed-in system switch can be done manually or by the energy management system; this embodiment does not specifically limit this action.

[0055] In this step, specifically, the power conversion system in the energy storage system may be instructed to enter a voltage regulation mode.

[0056] Step S200: Start the fuel cell system and control the energy storage system and fuel cell system to form a circuit so that the DC bus voltage is clamped within a preset range.

[0057] It is understood that the DC bus voltage mentioned here refers to the voltage of the DC bus. In this step, a power conversion system can be used to adjust the DC / DC converter so that the DC bus voltage is gradually clamped within a preset range.

[0058] In step S300, monitor the DC bus voltage. When the DC bus voltage reaches the preset range, start the inverter power supply and regulate the fuel cell power generation system to supply power to the external AC system.

[0059] In this step, the energy management system can monitor the DC bus voltage in real time. When the DC bus voltage reaches a preset range, it indicates that a connection has been successfully established between the fuel cell system and the energy storage system, and the energy storage system has clamped the DC bus voltage within a safe preset range. At this point, the inverter power supply can be started. Based on this, those skilled in the art can also set the preset voltage range according to actual conditions, and this application embodiment does not specifically limit this.

[0060] Therefore, the solution adopted in this application embodiment to address the high open-circuit voltage of fuel cells is as follows: In terms of system structure, an energy storage system is added. In terms of control method, the energy storage system is pre-started and instructed to enter voltage regulation mode before the inverter power supply is started. Then, the fuel cell system is started. At this time, the energy storage system can act as a load, forming a loop with the fuel cell system. This can be understood as the fuel cell system entering a load-generating state immediately upon startup, with its output voltage being a normal load voltage, not an open-circuit voltage. Finally, when the energy management system detects that the DC bus voltage is clamped within a safe preset range, it indicates that the fuel cell system and the energy storage system have successfully established a connection and formed a loop, and the DC bus voltage has stabilized at a normal voltage level. At this point, starting the inverter power supply will not cause any impact on the DC bus voltage.

[0061] By controlling the startup timing of each module, the high open-circuit voltage problem of the fuel cell system is avoided. The inverter can be designed according to the normal operating voltage of the fuel cell system rather than the maximum open-circuit voltage. This allows for the selection of power devices with lower withstand voltage ratings, lower on-resistance, faster switching speeds, and significantly lower losses. The inverter can always operate within the optimal efficiency range of the power devices, minimizing unnecessary energy loss and waste in the entire fuel cell power generation system. This effectively solves the problem of high energy loss and waste caused by current solutions for dealing with high open-circuit voltage in fuel cells.

[0062] The process of starting the inverter power supply when the DC bus voltage reaches the preset range in step S300 is further explained below.

[0063] Specifically, the inverter power supply is started when the DC bus voltage stabilizes to the preset start-up voltage value. The preset start-up voltage value is within a preset range.

[0064] It should be noted that, due to the unstable output of fuel cells and the large fluctuations in output voltage, a relatively mature approach to address this issue is to add a DC / DC converter at the output of the fuel cell. After boosting the voltage using the DC / DC converter, a subsequent DC / AC inverter is used to connect to the power grid or load. However, this method of using a DC / DC converter for voltage stabilization involves multiple voltage conversion stages, which can lead to energy loss and affect the conversion efficiency of fuel cell power generation.

[0065] In this embodiment of the application, by adding an energy storage system, the energy storage system can replenish the fuel cell power generation system or absorb excess energy, thereby stabilizing the DC bus voltage to the preset start-up voltage value. This can solve the problem of large fluctuations in the fuel cell output voltage. Furthermore, the energy storage system and the fuel cell system initially establish a good energy interaction, providing a stable foundation for subsequent energy interaction between the fuel cell power generation system and the external AC system.

[0066] Based on this, those skilled in the art can also set a preset starting voltage value according to the actual situation, and this application does not impose specific limitations on this. For example, the starting voltage value can be set to 700V to meet the working voltage requirements of the inverter power supply with a three-phase unbalanced load. Of course, the output of the fuel cell system can also be considered. When the fuel cell system is under normal load, the output voltage of a single cell is usually 0.75V~0.85V. Those skilled in the art can determine the starting voltage value based on the number of single cells connected in series in the fuel cell system.

[0067] The following is combined Figure 3 The process of regulating the fuel cell power generation system to supply power to the external AC system in step S300 is explained in detail.

[0068] like Figure 3 As shown, Figure 3 The process of regulating the power supply of a fuel cell power generation system to an external AC system is shown, and the process includes steps S310-S350:

[0069] Step S310: Confirm the system operation mode of the fuel cell power generation system; wherein, the system operation mode includes grid-connected operation and islanded operation.

[0070] In this step, the energy management system can determine whether the fuel cell power generation system is operating in grid-connected or islanded mode using the following methods:

[0071] The energy management system can collect the opening and closing status of the circuit breakers on the connection line between the inverter power supply and the power grid. When the circuit breaker is closed, it is in grid-connected operation; when the circuit breaker is open, it is in islanded operation. Alternatively, the energy management system can also determine whether the fuel cell power generation system is in grid-connected or islanded operation by receiving instructions from the superior power grid dispatch center. Of course, other methods can also be used, and this application does not specifically limit them.

[0072] Step S320: Based on the system operation mode of the fuel cell power generation system, generate an output mode control command; wherein, the output mode control command is used to instruct the energy output mode of the energy storage system.

[0073] Step S330: Confirm the target output power and actual output power of the inverter power supply.

[0074] In this step, the energy management system determines the target output power and the actual output power of the inverter power supply, which can be done in the following ways:

[0075] The energy management system can obtain the actual output power of the inverter by directly collecting the voltage and current on the AC side of the inverter.

[0076] The energy management system can determine the target output power of the inverter based on system operating parameters, which may include one or more of the following: total load demand, maximum grid supply capacity, electricity prices at different times, and the capacity of the energy storage system. How to specifically determine the target output power based on these system operating parameters will be explained in detail later and will not be discussed here.

[0077] Step S340: Calculate the output power difference based on the target output power and the actual output power of the inverter power supply, and generate a power adjustment command based on the output power difference.

[0078] Step S350: Based on the output mode control command and power adjustment command, control the energy storage system to adjust the output power so that the actual output power of the inverter power supply is adjusted to the target output power value.

[0079] Therefore, in this embodiment, through steps S310-S350, the energy management system first determines the energy output mode of the energy storage system based on the system operating mode, then determines the output power difference between the target output power and the actual output power of the inverter power supply, and finally controls the energy storage system to output accordingly based on these two aspects of analysis. This achieves precise, reliable, and stable power supply between the fuel cell power generation system and the external AC system, whether the fuel cell power generation system is grid-connected or islanded. This effectively improves power quality and system reliability, and fully utilizes the rapid response characteristics of the energy storage system to compensate for the insufficient dynamic response of the fuel cell, ensuring the stability and responsiveness of the entire fuel cell power generation system's output power. Furthermore, when the grid suddenly loses power or other faults occur, the energy storage system can smoothly and without impact switch modes to ensure normal power supply to the external AC system.

[0080] Understandably, during the process of regulating the power supply from the fuel cell power generation system to the external AC system, the power conversion system inside the energy storage system can also monitor the changes in the DC bus voltage in real time. When the DC bus voltage fluctuates, the DC / DC converter is adjusted to maintain the stability of the DC bus voltage, thereby ensuring the stability of energy interaction between the fuel cell system and the energy storage battery system.

[0081] The following section provides a detailed explanation of step S320, which involves generating output mode control commands based on the system operation mode of the fuel cell power generation system, when the system operation mode of the fuel cell power generation system is either grid-connected or islanded.

[0082] When the fuel cell power generation system is in grid-connected operation mode, the first output mode control command is generated.

[0083] The first output mode control command is used to instruct the energy storage system to output energy in accordance with the voltage and frequency of the power grid in the external AC system.

[0084] Through this step, in grid-connected mode, the grid acts as the primary power source, and the energy storage system tracks the grid's voltage and frequency, adjusting its output power by regulating the output current. The advantage of this is that if the fuel cell system suddenly shuts down for any reason, the energy storage system, thanks to its synchronization with the grid, can seamlessly and almost instantaneously fill the entire power deficit without needing to adjust its output voltage and frequency, continuing to supply power to the external AC system. This enhances the reliability and resilience of the entire power generation system.

[0085] When the fuel cell power generation system operates in islanded mode, a second output mode control command is generated.

[0086] The second output mode control command is used to instruct the energy storage system to output energy according to the set voltage and frequency.

[0087] Through this step, in islanded mode, the energy storage system can establish a stable voltage and frequency framework for the islanded system, and adjust the output power by adjusting the output current to ensure the stable operation of the fuel cell power generation system.

[0088] The following section provides a detailed explanation of how energy storage systems determine the voltage and frequency of the power grid, as well as the set voltage and frequency data.

[0089] Specifically, the voltage and frequency data of the power grid can be obtained by the energy storage system from the energy management system. Before sending the corresponding output mode control command to the energy storage system, the energy management system first collects the voltage waveform on the connection line between the inverter power supply and the power grid, analyzes the waveform to obtain the voltage and frequency of the power grid, and then carries the voltage and frequency data of the power grid when sending the output mode control command to the energy storage system, so that the energy storage system can output energy according to the voltage and frequency of the power grid.

[0090] The set voltage and frequency data can be pre-set in the energy storage system without needing to be obtained from the energy management system. Alternatively, they can be pre-set in the energy management system and included when sending output mode control commands to the energy storage system, so that the energy storage system can output according to the set voltage and frequency. This application does not specifically limit this approach.

[0091] The following describes step S330, which involves determining the target output power based on system operating parameters, using a specific embodiment as an example.

[0092] When a fuel cell power generation system is connected to the grid, the target output power can be determined based on only two parameters: the total power demand of the load and the maximum power supply capacity of the grid. The specific method is as follows:

[0093] Based directly on the total power demand of the load and the maximum power supply capacity of the power grid, if the maximum power supply capacity of the power grid can meet the total power demand of the load, the target output power can be 0. If the maximum power supply capacity of the power grid cannot meet the total power demand of the load, the difference between the two is the target output power.

[0094] For example, if the total power demand of the load is 15kW and the maximum power supply capacity of the grid is 16kW, then the target output power is 0. If the total power demand of the load is 15kW and the maximum power supply capacity of the grid is 11kW, then the target output power is 4kW. In other words, the discharge system needs to supplement 4kW of power from the fuel cell power generation system to power the load.

[0095] In this approach, the load prioritizes drawing power from the grid and then uses the fuel cell power generation system as a supplement. The processing logic is relatively simple, and the system can respond more quickly.

[0096] When a fuel cell power generation system is connected to the grid, the target output power can also be determined based on three parameters: the total electricity demand of the load, the electricity price at different times, and the energy storage system's capacity. The specific method is as follows:

[0097] First, based on the current electricity price and the energy storage system's capacity, if the current electricity price is higher than the first electricity price threshold (indicating that the current period is a high electricity price period) and the energy storage system's capacity is higher than the first capacity threshold (indicating that the energy storage system has sufficient capacity), it means that the fuel cell power generation system can be used to power the load at this time.

[0098] Subsequently, based on the total power demand of the load, if the total power demand of the load is lower than the preset first power demand threshold (indicating that the total power demand of the load is small), the target output power is determined to be the total power demand of the load. At this time, the power demand of the load can be met by the fuel cell power generation system alone.

[0099] Alternatively, if the total power demand of the load is lower than the preset first power demand threshold (indicating that the total power demand of the load is relatively small), the target output power can be determined as the preset maximum output power (indicating the maximum power that the inverter can output). In this case, in addition to meeting the power demand of the load, the fuel cell power generation system can sell the remaining electricity to the grid to earn profits.

[0100] If the total power demand of the load is not lower than the preset power demand threshold (indicating that the total power demand of the load is large), then the target output power is determined to be the preset maximum output power (indicating the maximum power that the inverter can output), and energy is supplemented through the grid.

[0101] The first electricity price threshold can be set to 1.1 yuan / kWh, the first power consumption threshold can be set to 85%, the maximum output power can be set according to the rated power of the inverter, for example, 50kW, and the first power demand threshold can be set to 40% of the rated power of the inverter, for example, 20kW. Of course, those skilled in the art can also set specific values ​​according to actual conditions, and this application embodiment does not specifically limit them.

[0102] For example, if the preset first electricity demand threshold is 20kW, and the current electricity price is higher than the first electricity price threshold (a high electricity price period), the energy storage system's power supply is higher than the first power supply threshold (sufficient power supply), and the total electricity demand of the load is 15kW, then the total electricity demand of the load is lower than the electricity demand threshold. Therefore, the target output power can be determined based on the total electricity demand of the load at 15kW, meaning that the fuel cell power generation system alone can meet the load's electricity needs.

[0103] In this approach, considering the energy storage system's capacity and price, during periods of high electricity prices and when the energy storage system has sufficient capacity, the load prioritizes drawing power from the fuel cell power generation system. If the load's total electricity demand is high, the grid can be used as a supplementary energy source; if the load's total electricity demand is low, selling electricity to the grid can be considered to generate profit. This strategy has the advantages of reducing electricity costs and increasing the utilization rate of self-owned energy, and can achieve peak shaving and valley filling and peak-valley arbitrage for the grid.

[0104] Alternatively, the following situation may exist: the electricity price for the current period is lower than the second electricity price threshold (indicating that the current period is a low electricity price period), and the energy storage system's power is lower than the second power consumption threshold (indicating that the energy storage system's power is insufficient). In this case, while the load is entirely powered by the grid, electricity can be purchased from the grid and charged through an inverter. This application embodiment does not specifically limit this. For example, the second electricity price threshold can be set to 0.37 yuan / kWh, and the second power consumption threshold can be set to 25%.

[0105] When a fuel cell power generation system is operating in islanded mode, the target output power can be determined based on two parameters: the total power demand of the load and the capacity of the energy storage system. The specific method is as follows:

[0106] Based on the total power demand of the load and the power capacity of the energy storage system, one scenario is that when the power capacity of the energy storage system can meet the total power demand of the load, the target output power can be determined according to the power demand of the load.

[0107] Another scenario is that the energy storage system's power supply cannot meet the total power demand of the load. In this case, the power supply to a portion of the loads with lower priority can be cut off according to the power consumption priority of each load.

[0108] Specifically, during islanded operation, the system can be configured to determine that the energy storage system's power supply can meet the load's total power demand when the energy storage system's power level is not lower than a third power threshold (indicating sufficient power supply) and the load's total power demand is lower than a second power demand threshold (indicating low total power demand). Conversely, if the energy storage system's power supply is lower than the third power threshold (indicating insufficient power supply) or the load's total power demand is higher than the second power demand threshold (indicating high total power demand), the system can determine that the energy storage system's power supply cannot meet the load's total power demand. For example, the third power threshold can be set to 60%, and the second power demand threshold can be set to 25% of the inverter's rated power, such as 12.5 kW.

[0109] In addition, after cutting off power to a portion of the loads with lower priority, the energy management system can also reduce the internally set short-circuit protection settings for the loads to more quickly identify load short-circuit situations.

[0110] In this approach, when energy resources are limited, the most critical loads can be prioritized by sacrificing secondary loads, thereby maximizing the power supply time of the core loads and improving the system's survivability and reliability.

[0111] The above are several ways to determine the target output power based on system operating parameters. Of course, those skilled in the art can also make other designs according to actual needs and circumstances. This application does not specifically limit these methods.

[0112] The following explains how energy management obtains these system operating parameters.

[0113] Among these system operating parameters, the energy storage system's power consumption and the total power demand of the load can be collected in real time by the energy management system. The grid's maximum power supply and the electricity price for each time period can be pre-stored in the energy management system before the energy storage system is started, or received by the energy management system from the higher-level grid dispatching.

[0114] The following describes some measures that the energy management system can take in its control methods to further improve the stability and safety of the entire fuel cell power generation system.

[0115] Energy management systems can monitor the grid frequency and, when the grid frequency is too high, control the output frequency of the energy storage system to reduce the grid frequency, thereby participating in grid frequency regulation and improving grid security and stability.

[0116] When operating in isolated grid conditions, the energy management system can also limit the output power of the fuel cell system to prevent over-generation from causing the output frequency of the fuel cell system to spike.

[0117] The energy management system can also provide fault warnings and protection based on monitoring the operating status of the fuel cell power generation system. For example, it can provide warnings and protection against overvoltage, overcurrent, and overtemperature issues in the fuel cell system. Similarly, it can provide warnings and protection against overvoltage, overcurrent, overtemperature, and PCS faults in the energy storage system, based on monitoring its operating status. Finally, it can provide warnings and protection against overvoltage, overcurrent, overtemperature, and communication anomalies in the inverter power supply, based on monitoring its operating status.

[0118] Figure 4 A schematic diagram of a fuel cell power generation system in another embodiment is shown. Figure 4 The structure shown is Figure 1 Compared to the previous system, the number of fuel cell power generation systems has increased. Among them, Figure 1 It includes only one fuel cell power generation system, while Figure 4 This includes multiple fuel cell power generation systems connected in parallel, and specifically, in terms of connection structure, the AC side of the inverter power supply of each fuel cell power generation system is connected together.

[0119] This design shifts the power supply reliability from relying on a single fuel cell power generation system to relying on multiple fuel cell power generation systems. This not only improves the overall availability of the system but also brings comprehensive improvements in efficiency, flexibility, maintainability, and scalability.

[0120] The following is based on Figure 4 The structure of the fuel cell power generation system and how the energy management system regulates the process of supplying power to the external AC system will be explained in detail.

[0121] Following the same logic, when the energy management system regulates the power supply from the fuel cell power generation system to the external AC system, it only needs to extend the process of managing one fuel cell power generation system to managing multiple fuel cell power generation systems. Specifically:

[0122] First, confirm the system operation mode of each fuel cell power generation system; this includes grid-connected operation and islanded operation. Typically, the system operation mode of each fuel cell power generation system is consistent.

[0123] Subsequently, for each fuel cell power generation system, an output mode control command is generated based on the system operation mode of the fuel cell power generation system; wherein, the output mode control command is used to instruct the energy output mode of the energy storage system in the fuel cell power generation system.

[0124] Then, for each fuel cell power generation system, the output power difference is calculated based on the target output power and the actual output power of the inverter power supply in the fuel cell power generation system, and a power adjustment command is generated based on the output power difference.

[0125] Finally, for each fuel cell power generation system, based on the output mode control command and power adjustment command of the fuel cell power generation system, the energy storage system in the fuel cell power generation system is controlled to adjust the output power so that the actual output power of the corresponding inverter power supply is adjusted to the target output power value.

[0126] Therefore, extending the management approach from a single fuel cell power generation system to managing multiple fuel cell power generation systems can enhance the scalability and standardization of fuel cell power generation systems. Expansion to a large number of systems can be achieved simply by adding communication and computing resources, reducing the complexity of large-scale integration. Newly integrated fuel cell power generation systems only need to adapt to standard command interfaces, such as the interface for receiving commands during output mode and power adjustment, without requiring a reconstruction of the overall control strategy.

[0127] Furthermore, for each fuel cell power generation system, before calculating the output power difference based on the target output power and the actual output power of the inverter power supply in the fuel cell power generation system, the energy management system can first determine the target output power of the inverter power supply in the fuel cell power generation system.

[0128] The method for determining the target output power of the inverter in each fuel cell power generation system is explained below.

[0129] One approach is to directly use an equal distribution method, allocating the same target output power to the inverter power supply of each fuel cell power generation system based on the total target output power of the entire fuel cell power generation system.

[0130] Another approach is to consider factors such as the lifespan and efficiency of each fuel cell power generation system, and select only a portion of the fuel cell power generation systems to participate in the energy interaction with the load and the grid. The target output power is then allocated to the inverter power supply of these fuel cell power generation systems based on the total target output power of the entire fuel cell power generation system.

[0131] For example, considering lifespan factors, only fuel cell power generation systems with shorter operating times can be selected to participate in energy interaction with the load and the grid. For fuel cell power generation systems with longer operating times, no target output power will be allocated to their inverters, and these systems will not participate in energy interaction with the load and the grid. As another example, considering operational efficiency factors, based on the system's optimal efficiency, a subset of fuel cell power generation systems can be selected to participate in energy interaction with the load and the grid after analysis.

[0132] Of course, these are just some examples. Those skilled in the art can also use other methods to determine the target output power of the inverter power supply in each fuel cell power generation system. This application does not specifically limit this.

[0133] It is understandable that the total target output power of the entire fuel cell power generation system mentioned here can be the aforementioned Figure 1 The target output power of the inverter power supply, determined according to the system operating parameters in the control method corresponding to the single fuel cell power generation system shown, will not be elaborated here.

[0134] Furthermore, after determining the target output power of the inverter power supply in each fuel cell power generation system, the control within each fuel cell power generation system can also be performed in accordance with the aforementioned method. Figure 1 The control method for the single fuel cell power generation system shown is not described in detail here.

[0135] Now refer to Figure 5 This is a schematic diagram of the structure of a control device 1100 for a fuel cell power generation system provided in an embodiment of this application. This device is applied to a fuel cell power generation system, the structure of which can be specifically referred to above. Figure 1 The corresponding structural descriptions will not be repeated here.

[0136] Combination Figure 5 The control device 1100 may specifically include an energy storage system start-up module 1101, a fuel cell system start-up module 1102, and an inverter power supply start-up and power supply regulation module 1103.

[0137] The energy storage system startup module 1101 is designed to start the energy storage system in response to the closing of the feedin system switch and instruct the energy storage system to enter a voltage regulation mode. The feedin system switch is located between the AC side of the inverter power supply and the external AC system.

[0138] The function of the fuel cell system start-up module 1102 is to start the fuel cell system and control the energy storage system and the fuel cell system to form a circuit so that the DC bus voltage is clamped within a preset range.

[0139] The function of the inverter power supply startup and power supply regulation module 1103 is to monitor the DC bus voltage. When the DC bus voltage reaches the preset range, the inverter power supply is started, and the fuel cell power generation system is regulated to supply power to the external AC system.

[0140] It is understood that in the apparatus of this invention, each module executes the method of the above embodiments, and its specific functions and corresponding technical effects can be referred to the above embodiments. Figures 1-4 The methods explained will not be elaborated here.

[0141] Now for reference Figure 6 The diagram shows a block diagram of an electronic device 1200 according to one embodiment of this application. The electronic device 1200 may include one or more processors 1201 coupled to a controller hub 1203. In at least one embodiment, the controller hub 1203 communicates with the processor 1201 via a multi-branch bus such as a Front Side Bus (FSB), a point-to-point interface such as a Quick Path Interconnect (QPI), or a similar connection 1206. The processor 1201 executes instructions controlling general-type data processing operations. In one embodiment, the controller hub 1203 includes, but is not limited to, a Graphics Memory Controller Hub (GMCH) (not shown) and an Input / Output Hub (IOH) (which may be on a separate chip) (not shown), wherein the GMCH includes memory and a graphics controller and is coupled to the IOH.

[0142] Electronic device 1200 may also include a coprocessor 1202 and a memory 1204 coupled to a controller hub 1203. Alternatively, one or both of the memory and the GMCH may be integrated within the processor (as described in this application), with memory 1204 and coprocessor 1202 directly coupled to processor 1201 and controller hub 1203, which resides on a single chip with the IOH. Memory 1204 may be, for example, Dynamic Random Access Memory (DRAM), Phase Change Memory (PCM), or a combination of both. In one embodiment, coprocessor 1202 is a dedicated processor, such as, for example, a high-throughput MIC (Many Integerated Core) processor, a network or communication processor, a compression engine, a graphics processor, a general-purpose graphics processor (GPGPU), or an embedded processor, etc. Optional properties of coprocessor 1202 are indicated by dashed lines. Figure 6 middle.

[0143] As a computer-readable storage medium, memory 1204 may include one or more tangible, non-transitory computer-readable media for storing programs and / or instructions. For example, memory 1204 may include any suitable non-volatile memory such as flash memory and / or any suitable non-volatile storage device, such as one or more hard-disk drives (HDDs), one or more compact disc (CD) drives, and / or one or more digital versatile disc (DVD) drives.

[0144] In one embodiment, electronic device 1200 may further include a Network Interface Controller (NIC) 1206. The network interface 1206 may include a transceiver for providing a radio interface for electronic device 1200 to communicate with any other suitable device, such as a front-end module, antenna, etc. In various embodiments, the network interface 1206 may be integrated with other components of electronic device 1200. The network interface 1206 can implement the functions of the communication unit in the above embodiments.

[0145] Electronic device 1200 may further include input / output (I / O) device 1205. I / O 1205 may include: a user interface designed to enable a user to interact with electronic device 1200; a peripheral component interface designed to enable peripheral components to also interact with electronic device 1200; and / or sensors designed to determine environmental conditions and / or location information related to electronic device 1200.

[0146] It is worth noting that, Figure 6 This is merely an example. That is, although... Figure 6 The electronic device 1200 is shown to include multiple devices such as processor 1201, controller hub 1203, and memory 1204. However, in actual applications, devices using the methods of this application may include only a portion of the devices in the electronic device 1200. For example, it may include only processor 1201 and NIC 1206. Figure 6 The properties of the optional devices are shown in dashed lines. According to some embodiments of this application, the memory 1204, which is a computer-readable storage medium, stores instructions that, when executed on a computer, cause the electronic device 1200 to perform the control method of the fuel cell power generation system according to the above embodiments. Specific details can be found in the methods of the above embodiments, and will not be repeated here.

[0147] This application also provides a computer-readable storage medium storing at least one instruction or at least one program. The at least one instruction or at least one program is loaded and executed by a processor to implement the control method of the fuel cell power generation system as described in the above embodiments. For details, please refer to the methods in the above embodiments, which will not be repeated here.

[0148] Now for reference Figure 7 The diagram shown is a block diagram of a SoC (System on Chip) 1300 according to an embodiment of this application. Figure 7 In the diagram, similar components share the same reference numerals. Additionally, dashed boxes are an optional feature for more advanced SoCs. Figure 7 In this embodiment, SoC 1300 includes: an interconnect unit 1350 coupled to an application processor 1310; a system proxy unit 1380; a bus controller unit 1390; an integrated memory controller unit 1340; one or more coprocessors 1320, which may include integrated graphics logic, an image processor, an audio processor, and a video processor; a static random access memory (SRAM) unit 1330; and a direct memory access (DMA) unit 1360. In one embodiment, the coprocessor 1320 includes a dedicated processor, such as, for example, a network or communication processor, a compression engine, a GPGPU, a high-throughput MIC processor, or an embedded processor.

[0149] The static random access memory (SRAM) cell 1330 may include one or more computer-readable media for storing data and / or instructions. The computer-readable storage medium may store instructions, specifically, temporary and permanent copies of those instructions. These instructions may include, when executed by at least one unit in the processor, causing the SoC 1300 to perform the control method of the fuel cell power generation system according to the above embodiments, as detailed in the methods described above, which will not be repeated here.

[0150] Various embodiments of the mechanisms disclosed in this application can be implemented in hardware, software, firmware, or combinations of these implementation methods. Embodiments of this application can be implemented as computer programs or program code executable on a programmable system, the programmable system including at least one processor, a storage system (including volatile and non-volatile memory and / or storage elements), at least one input device, and at least one output device.

[0151] Program code can be applied to input instructions to execute the functions described in this application and generate output information. The output information can be applied to one or more output devices in a known manner. For the purposes of this application, the processing system includes any system having a processor such as, for example, a Digital Signal Processor (DSP), a microcontroller, an Application Specific Integrated Circuit (ASIC), or a microprocessor.

[0152] The program code can be implemented using a high-level procedural language or an object-oriented programming language to communicate with the processing system. Assembly language or machine language can also be used when needed. In fact, the mechanisms described in this application are not limited to any particular programming language. In either case, the language can be a compiled language or an interpreted language.

[0153] In some cases, the disclosed embodiments may be implemented in hardware, firmware, software, or any combination thereof. The disclosed embodiments may also be implemented as instructions carried or stored thereon on one or more temporary or non-temporary machine-readable (e.g., computer-readable) storage media, which may be read and executed by one or more processors. For example, the instructions may be distributed via a network or through other computer-readable media. Therefore, machine-readable media may include any mechanism for storing or transmitting information in a machine-readable (e.g., computer-readable) form, including but not limited to floppy disks, optical disks, CD-ROMs, compact disc read-only memory (CD-ROMs), magneto-optical disks, read-only memory (ROM), random access memory (RAM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), magnetic cards or optical cards, flash memory, or tangible machine-readable storage for transmitting information (e.g., carrier waves, infrared signals, digital signals, etc.) using the Internet in the form of electrical, optical, acoustic, or other forms of propagated signals. Therefore, machine-readable media includes any type of machine-readable medium suitable for storing or transmitting electronic instructions or information in a machine-readable (e.g., computer-readable) form.

[0154] In the accompanying drawings, some structural or methodological features may be shown in a specific arrangement and / or order. However, it should be understood that such a specific arrangement and / or order may not be necessary. Rather, in some embodiments, these features may be arranged in a manner and / or order different from that shown in the accompanying drawings. Furthermore, including structural or methodological features in a particular figure does not imply that such features are required in all embodiments, and in some embodiments, these features may be omitted or may be combined with other features.

[0155] It should be noted that the order of the above embodiments of the present invention is merely for descriptive purposes and does not represent the superiority or inferiority of the embodiments. Furthermore, specific embodiments have been described above. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps described in the claims can be performed in a different order than that shown in the embodiments and still achieve the desired result. Additionally, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0156] It should be noted that all units / modules mentioned in the device embodiments of this application are logical units / modules. Physically, a logical unit / module can be a physical unit / module, a part of a physical unit / module, or a combination of multiple physical units / modules. The physical implementation of these logical units / modules themselves is not the most important factor; the combination of functions implemented by these logical units / modules is the key to solving the technical problems proposed in this application. Furthermore, to highlight the innovative aspects of this application, the above-described device embodiments of this application have not introduced units / modules that are not closely related to solving the technical problems proposed in this application. This does not mean that the above-described device embodiments do not contain other units / modules.

[0157] It should be noted that in the examples and description of this patent, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0158] Although this application has been illustrated and described with reference to certain preferred embodiments thereof, those skilled in the art should understand that various changes in form and detail may be made thereto without departing from the spirit and scope of this application.

Claims

1. A control method for a fuel cell power generation system, characterized in that, This invention is applied to a fuel cell power generation system, which includes a fuel cell system, an inverter, and an energy storage system. The energy storage system includes a DC / DC converter. The DC side of the inverter is connected to the fuel cell system via a DC bus, and the AC side of the inverter is connected to an external AC system. The energy storage system is connected to the DC bus between the fuel cell system and the inverter. The control method includes: In response to the operation of closing the feed-in system switch, the energy storage system is started and instructed to enter the voltage regulation mode; wherein, the feed-in system switch is located between the AC side of the inverter power supply and the external AC system; The fuel cell system is started, and the energy storage system and the fuel cell system are controlled to form a circuit so that the DC bus voltage is clamped within a preset range. The DC / DC converter is used to clamp the DC bus voltage within the preset range. The DC bus voltage is monitored. When the DC bus voltage reaches the preset range, the inverter power supply is started, and the fuel cell power generation system is regulated to supply power to the external AC system.

2. The control method for the fuel cell power generation system according to claim 1, characterized in that, When the DC bus voltage reaches the preset range, the inverter power supply is started, including: When the DC bus voltage stabilizes to a preset start-up voltage value, the inverter power supply is started. The preset start-up voltage value is a voltage value within the preset range.

3. The control method for the fuel cell power generation system according to claim 1, characterized in that, Regulating the supply of power from the fuel cell power generation system to the external AC system includes: The system operation mode of the fuel cell power generation system is confirmed; wherein, the system operation mode includes grid-connected operation and islanded operation; Based on the system operation mode of the fuel cell power generation system, an output mode control command is generated; wherein, the output mode control command is used to instruct the energy output mode of the energy storage system; Determine the target output power and actual output power of the inverter power supply; The output power difference is calculated based on the target output power and the actual output power of the inverter power supply, and a power adjustment command is generated based on the output power difference. Based on the output mode control command and the power adjustment command, the energy storage system is controlled to adjust its output power so that the actual output power of the inverter power supply is adjusted to the target output power value.

4. The control method for the fuel cell power generation system according to claim 3, characterized in that, Based on the system operation mode of the fuel cell power generation system, output mode control commands are generated, including: When the system operation mode of the fuel cell power generation system is grid-connected operation, a first output mode control command is generated. The first output mode control command is used to instruct the energy storage system to output energy in accordance with the voltage and frequency of the power grid in the external AC system.

5. The control method for the fuel cell power generation system according to claim 3, characterized in that, Based on the system operation mode of the fuel cell power generation system, output mode control commands are generated, including: When the system operation mode of the fuel cell power generation system is isolated grid operation, a second output mode control command is generated; The second output mode control command is used to instruct the energy storage system to output energy according to the set voltage and frequency.

6. The control method for a fuel cell power generation system according to claim 1, characterized in that, The fuel cell power generation system includes multiple fuel cell power generation systems connected in parallel.

7. A fuel cell power generation system, characterized in that, include: Fuel cell system; An inverter power supply, wherein the DC side of the inverter power supply is connected to the fuel cell system via a DC bus, and the AC side of the inverter power supply is connected to an external AC system; An energy storage system is connected to the DC bus between the fuel cell system and the inverter power supply, and the energy storage system includes a DC / DC converter; An energy management system, wherein the energy management system is used to execute the control method of the fuel cell power generation system according to any one of claims 1-6.

8. A control device for a fuel cell power generation system, characterized in that, This invention is applied to a fuel cell power generation system, which includes a fuel cell system, an inverter, and an energy storage system. The energy storage system includes a DC / DC converter. The DC side of the inverter is connected to the fuel cell system via a DC bus, and the AC side of the inverter is connected to an external AC system. The energy storage system is connected to the DC bus between the fuel cell system and the inverter. The control device includes: An energy storage system startup module is used to start the energy storage system in response to the operation of closing the feed-in system switch, and to instruct the energy storage system to enter a voltage regulation mode; wherein, the feed-in system switch is located between the AC side of the inverter power supply and the external AC system; A fuel cell system start-up module is used to start the fuel cell system and control the energy storage system and the fuel cell system to form a circuit so that the DC bus voltage is clamped within a preset range, wherein the DC / DC converter is used to clamp the DC bus voltage within the preset range; The inverter power supply startup and power supply regulation module is used to monitor the DC bus voltage. When the DC bus voltage reaches a preset range, the inverter power supply is started, and the fuel cell power generation system is regulated to supply power to the external AC system.

9. An electronic device, characterized in that, The electronic device includes a processor and a memory, wherein the memory stores at least one instruction or at least one program, and the at least one instruction or the at least one program is loaded and executed by the processor to implement the control method of the fuel cell power generation system as described in any one of claims 1-6.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores at least one instruction or at least one program, which is loaded and executed by a processor to implement the control method of the fuel cell power generation system as described in any one of claims 1-6.

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