A method and device for online activation of a hydrogen fuel cell group power generation system

Abstract

The present invention discloses an online activation method and device for a hydrogen fuel cell group power generation system, which relates to the technical field of fuel cell systems, and comprises the following steps: 1. an idling activation procedure for a hydrogen fuel cell engine; 2. maintaining 80%>SOC≥30% for an energy storage battery; 3. detecting the water temperature and air temperature entering the stack of the system and controlling the water temperature and air temperature entering the stack to reach a predetermined temperature through a system thermal management cycle; 4. controlling the power change of the stack according to a given activation process current density scheme to complete the online activation procedure; 5. judging whether the voltage difference before and after the activation of the hydrogen fuel cell power generation system is greater than a predetermined value, and if so, switching other units in sequence until all are activated; compared with the prior art, the activation method for a hydrogen fuel cell group power generation system in the present invention can not only ensure the external power supply of the power generation system as a whole, but also perform real-time online activation of the stack at the same time, so as to maintain the performance state of the fuel cell under continuous and uninterrupted working conditions and extend the life of the stack.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell systems, and in particular to an online activation method and device for a hydrogen fuel cell group power generation system. Background Art

[0002] Proton exchange membrane fuel cells are devices that can directly convert chemical energy into electrical energy, and the only product is water. They are unanimously recognized as the cleanest and most efficient energy technology in the 21st century. For multi-stack fuel cell system power generation systems, they can achieve good hot spot cogeneration, greatly improve energy utilization efficiency, and have good application prospects for achieving carbon neutrality goals. But on the other hand, as the fuel cell engine runs longer, the performance of the fuel cell stack will slowly decay. When the fuel cell stack decays to 80% of its initial state, it is considered to have reached the end of its life. The factors that cause the attenuation of fuel cell stacks can be divided into two categories: one is irreversible attenuation, such as corrosion of carbon carriers, loss of catalysts, enlargement of platinum particles, damage to proton exchange membranes, etc.; the other is reversible attenuation, the most important reversible attenuation is the contamination of the catalyst by impurities, such as sulfides and nitrides in the air, and reducing gas impurities in hydrogen. Impurities will react on the catalyst surface, causing the catalyst surface to be covered and the reaction area to be reduced. Fine dust in the air will also be adsorbed on the gas diffusion layer, causing the gas diffusion layer to be blocked. After the fuel cell system has been working for a period of time, the platinum particles on the MEA will aggregate, dissolve, and migrate due to Ostwald ripening and other reasons. The platinum ions migrate to the membrane surface and are reduced by the hydrogen that penetrates the anode to form platinum belts, affecting the performance and life of the fuel cell.

[0003] Traditional activation is carried out offline, where the fuel cell stack is disassembled and placed on a test bench. The traditional PEMFC activation process usually takes several hours or days and requires power outage and shutdown, which greatly affects efficiency and convenience. In the application scenario where hydrogen fuel cells are used as power stations, the power generation hydrogen fuel cell group needs to generate electricity in real time without interruption to provide stable and sustainable electricity for the power grid. Therefore, there is an urgent need for an activation method that can achieve online activation without affecting the power supply and distribution system. Summary of the invention

[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide a method and device for online activation of a hydrogen fuel cell group power generation system, aiming to solve the technical problems in the related art to a certain extent.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0006] A method for activating a hydrogen fuel cell group power generation system comprises the following steps:

[0007] S1, the hydrogen fuel cell group power generation system is in idle state and enters the online activation program state;

[0008] S2, determine whether the SOC of the energy storage battery is not higher than 80% and not lower than 30%. If not, proceed to S3. If yes, proceed to S4.

[0009] S3, when SOC is less than 30%, the hydrogen fuel cell group power generation system enters the power generation operation state and charges the energy storage battery to SOC ≥ 30%; when SOC is greater than 80%, the energy storage battery is used as a power source to be sent to the grid through the inverter for power supply until the energy storage battery SOC is no higher than 80%, and then enters the next step;

[0010] S4, the hydrogen fuel cell group power generation system enters the activation waiting state;

[0011] S5, checking whether the water temperature and air temperature entering the stack meet the predetermined temperature requirements. If not, proceed to S6. If yes, directly proceed to step S8.

[0012] S6, start the control system thermal management cycle and proceed to the next step;

[0013] S7, control the thermal management cycle of the control system to make the water temperature and air temperature entering the reactor reach the predetermined temperature, and then proceed to the next step;

[0014] S8, controlling the stack power change according to the given activation process current density scheme, completing the online activation procedure, and proceeding to the next step;

[0015] S9, determine whether the voltage difference before and after activation of the hydrogen fuel cell group power generation system is greater than 3V, if not, adjust the humidity adjustment device to increase the air humidity, and return to step S8, if yes, proceed to the next step;

[0016] S10, the activated hydrogen fuel cell group power generation system enters the standby state, and switches other units in sequence until all are completed before entering the next step;

[0017] S11, determine whether the hydrogen fuel cell group power generation system has completed activation. If not, return to step S5. If so, end the online activation procedure.

[0018] In step S8, the output power f(t) of the activated hydrogen fuel cell group power generation system and the output power h(t) of the inactivated hydrogen fuel cell group power generation system are collected by the energy management controller. The output power is h(t)=at 3 +bt 2 +ct+d, the unit is kW, where t is time, the unit is second, a, b, c, d are all constants, and the predicted target power is G(t) = f(t) + h(t).

[0019] On the basis of the above technical solution, the step S8 is provided with a step of calculating the power of the energy storage battery, and the power of the energy storage battery is h1(t)=a1t+b 1， Where t is time in seconds, a1 and b1 are constant values, and the expected output power is calculated as G1(t) = G(t) + h1(t). After the expected output power is obtained, it is compared with the actual output power detected by the power meter. Through optimization control, the control deviation between the expected output power and the actual output power approaches 0, that is, the expected output power is consistent with the actual output power. When the predicted target power differs greatly from the expected output power, the energy storage battery is discharged, and when the predicted target power differs slightly from the expected output power, the energy storage battery is charged.

[0020] On the basis of the above technical solution, in step S5, when the water temperature entering the hydrogen fuel cell system meets 70°C and the air temperature entering the stack meets 70°C, the process proceeds to step S8.

[0021] On the basis of the above technical solution, in step S11, it is determined whether the difference between the average voltage at 600A before system activation and the average voltage at 600A after system activation is greater than 5V. If it is greater than 5V, the activation of the hydrogen fuel cell group power generation system is completed. If it is less than 5V, steps S1 to S11 are repeated, and another round of online activation is performed until the activation conditions are met; or the voltage value of the hydrogen fuel cell group power generation system at 600A current state is controlled and detected, and then the voltage difference before and after activation is compared to see whether it is greater than 3V.

[0022] On the basis of the above technical solution, an online activation device for a hydrogen fuel cell power generation system includes a hydrogen fuel cell group power generation system, an energy management controller, a DC / AC inverter, a power meter, and a hydrogen fuel cell power generation system group;

[0023] Among them, the hydrogen fuel cell group power generation system is used to supply hydrogen for power generation and provide external electrical energy;

[0024] The energy management controller is equipped with an energy storage battery module, a predicted power module, an expected power module, and an optimization control module;

[0025] DC / AC inverter is used for AC / DC conversion;

[0026] Power meters are used to monitor the power consumption and power generation of the power grid in real time.

[0027] On the basis of the above technical solution, the expected power module controls the predicted power module and the energy storage battery module to achieve the expected power output.

[0028] On the basis of the above technical solution, a hydrogen fuel cell engine for a hydrogen fuel cell group power generation system includes an air compressor, an intercooler, a humidifier and a fuel cell stack connected in sequence, wherein the humidifier is provided with a humidity regulating device and the humidity regulating device is connected to the humidifier, the fuel cell stack is provided with a radiator and a DC / DC converter, the radiator is used for auxiliary thermal management of the fuel cell stack, the DC / DC converter converts the voltage and current of the fuel cell stack and outputs it, the fuel cell stack is also provided with a hydrogen pump and a combination valve, the hydrogen pump is connected to the hydrogen circulation pipeline of the fuel cell stack to assist the hydrogen circulation, and the combination valve is connected to the hydrogen supply pipeline to adjust the amount of hydrogen entering the fuel cell stack.

[0029] On the basis of the above technical solution, the combination valve includes at least one group of pressure reducing valves and proportional valves connected in series.

[0030] On the basis of the above technical solution, a hydrogen fuel cell group power generation system includes a hydrogen supply system, at least two hydrogen fuel cell engines, a DC / DC converter and a DC / AC inverter. The hydrogen supply system is connected to the hydrogen fuel cell engines, and each hydrogen fuel cell engine is connected to a corresponding DC / DC converter. The DC / DC converter is connected to the DC / AC inverter through a switch. An energy storage battery is also provided in parallel with the hydrogen fuel cell engine. The energy storage battery is connected to the DC / AC inverter through a switch K0, and the DC / AC inverter is connected to an external power grid.

[0031] Compared with the prior art, the advantages of the present invention are:

[0032] Compared with the prior art, the activation method of a hydrogen fuel cell group power generation system in the present invention can not only ensure the external power supply of the power generation system as a whole, but also perform real-time online activation of the fuel cell stack, which has positive significance in maintaining the performance state of the fuel cell and extending the life of the fuel cell stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a principle block diagram of a method for activating a hydrogen fuel cell group power generation system in an embodiment of the present invention;

[0034] Figure 2 It is a structural schematic diagram of an online activation device for a hydrogen fuel cell power generation system;

[0035] Figure 3 is a schematic structural diagram of a single hydrogen fuel cell engine in an embodiment of the present invention;

[0036] Figure 4 This is a schematic structural diagram of a hydrogen fuel cell group power generation system according to an embodiment of the present invention;

[0037] Figure 5 is a diagram of current density during the activation process in an embodiment of the present invention;

[0038] Figure 6Graph showing power changes during the activation process in an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0040] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0041] The terms used in the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms of "a", "said" and "the" used in the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in this article refers to and includes any or all possible combinations of one or more associated listed items. It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein can be interpreted as "at the time of" or "when" or "in response to determination".

[0042] See also Figure 1 The schematic diagram of a hydrogen fuel cell group power generation system activation method in an embodiment of the present invention is shown in the embodiment of the present invention. The method includes the following steps:

[0043] S1, hydrogen fuel cell engine idle state, enters online activation program state;

[0044] S2, determine whether the SOC of the energy storage battery is not higher than 80% and not lower than 30%. If not, proceed to S3. If yes, proceed to S4.

[0045] S3, when SOC is less than 30%, the hydrogen fuel cell power generation system group enters the power generation operation state and charges the energy storage battery to SOC ≥ 30%; when SOC is greater than 80%, the energy storage battery is used as a power source to be sent to the grid through the inverter for power supply until the energy storage battery SOC is no higher than 80%, and then enters the next step;

[0046] S4, the hydrogen fuel cell engine enters a state ready for activation;

[0047] S5, checking whether the water temperature and air temperature entering the stack meet the predetermined temperature requirements. If not, proceed to S6. If yes, directly proceed to step S8.

[0048] In step S5 of this embodiment, the temperature threshold conditions are set as follows: the water temperature entering the hydrogen fuel cell system meets 70° C. and the air temperature entering the stack meets 70° C.

[0049] In some embodiments, different temperature values ​​or temperature ranges may be preset according to actual usage and battery stack model specifications.

[0050] S6, start the control system thermal management cycle and proceed to the next step;

[0051] S7, control the thermal management cycle of the control system to make the water temperature and air temperature entering the reactor reach the predetermined temperature, and then proceed to the next step;

[0052] S8, controlling the stack power change according to the given activation process current density scheme, completing the online activation procedure, and proceeding to the next step;

[0053] In step S8 of this embodiment, the output power f(t) of the activated hydrogen fuel cell group power generation system and the output power h(t) of the inactivated hydrogen fuel cell group power generation system are collected by the energy management controller. In the present disclosure, the activation power f(t) is a piecewise function, and different activation power change values ​​are set according to different time stages. The output power is h(t)=at 3 +bt 2 +ct+d, the unit is kW, where t is time, the unit is second, a, b, c, d are all constants, and the values ​​are determined according to the applicable hydrogen fuel cell model and usage scenario. The predicted target power is G(t) = f(t) + h(t), that is, the predicted target power is the sum of the activated power and the inactivated power.

[0054] In addition, step S8 is provided with a step for calculating the power of the energy storage battery, and the power of the energy storage battery is h1(t)=a1t+b 1， Where t is time in seconds. When the predicted target power differs greatly from the expected power, a positive value is taken, i.e., the discharging state; when the predicted target power differs slightly from the expected power, a negative value is taken, i.e., the charging state; a1 is a value constant, and the expected power is calculated as G1(t) = G(t) + h1(t). After the expected power is obtained, it is compared with the actual output power detected by the power meter. Through optimization control, the control deviation between the expected power and the actual output power is made 0, i.e., the expected power is consistent with the actual output power. When the predicted target power differs greatly from the expected power, i.e., it is greater than 5kW, the energy storage battery is discharged; when the predicted target power differs slightly from the expected power, i.e., it is less than 5kW, the energy storage battery is charged.

[0055] S9, determine whether the voltage difference before and after activation of the hydrogen fuel cell group power generation system is greater than 3V, if not, adjust the humidity adjustment device to increase the air humidity, and return to step S8, if yes, proceed to the next step;

[0056] In step S9 of this embodiment, the voltage value of the hydrogen fuel cell group power generation system at the 600A current state is controlled and detected, and then the voltage difference before and after activation is compared to see whether it is greater than 3V. If the voltage difference before and after activation is greater than 3V, the humidity regulating device is adjusted to increase the air humidity, and then the given current density scheme is repeated to control the power change of the stack to complete a round of online activation procedure.

[0057] S10, the activated hydrogen fuel cell group power generation system enters the standby state, and switches other units in sequence until all are completed before entering the next step;

[0058] S11, determine whether the hydrogen fuel cell group power generation system has completed activation. If not, return to step S5. If so, end the online activation procedure.

[0059] In this embodiment, it is determined whether the difference between the average voltage at 600A before system activation and the average voltage at 600A after system activation is greater than 5V. If it is greater than 5V, the engine system activation is completed. If it is less than 5V, steps S1 to S11 are repeated, and another round of online activation is performed until the activation conditions are met.

[0060] See also Figure 2 Shown is a structural schematic diagram of an online activation device for a hydrogen fuel cell power generation system in an embodiment of the present disclosure, an online activation device for a hydrogen fuel cell power generation system, including a hydrogen fuel cell group power generation system, an energy management controller, a DC / AC inverter, a power meter, and a hydrogen fuel cell power generation system group.

[0061] The hydrogen fuel cell group power generation system is used to supply hydrogen for power generation and provide external electrical energy; the energy management controller is equipped with an energy storage battery module, a predicted power module, an expected power module, and an optimization control module. The energy management controller is responsible for the management and scheduling of energy during the online activation process of the stack, especially balancing the changes in external power supply and the power changes in the online activation process, while ensuring the power scheduling of the stack activation process and the adaptation of the external power supply; the DC / AC inverter is used for AC / DC conversion, converting the DC power supply of the hydrogen fuel cell group power generation system into AC mains power; the power meter is used to monitor the power consumption and power generation power of the power grid in real time.

[0062] In this embodiment, the expected power module controls the predicted power module and the energy storage battery module to achieve the expected power output. The expected power module is scheduled by the energy storage battery module and matches the predicted power of the predicted power module to achieve the expected power output, ensuring the power change during the stack activation process and the stable control of the external power supply, while meeting the requirements of online activation and real-time grid power supply.

[0063] See also Figure 3 The figure shows a schematic diagram of the structure of a single hydrogen fuel cell engine in an embodiment of the present invention, a hydrogen fuel cell engine for a hydrogen fuel cell group power generation system, comprising an air compressor, an intercooler, a humidifier and a fuel cell stack connected in sequence, wherein the humidifier is provided with a humidity regulating device and the humidity regulating device is connected to the humidifier, the fuel cell stack is provided with a radiator and a DC / DC converter, the radiator is used for auxiliary thermal management of the fuel cell stack, the DC / DC converter converts the voltage and current of the fuel cell stack into output, the fuel cell stack is also provided with a hydrogen pump and a combination valve, the hydrogen pump is connected to the hydrogen circulation pipeline of the fuel cell stack to assist hydrogen circulation, and the combination valve is connected to the hydrogen supply pipeline to adjust the amount of hydrogen entering the fuel cell stack.

[0064] In this embodiment, the combination valve includes at least one group of pressure reducing valves and proportional valves connected in series, which controls the supply of hydrogen in the hydrogen storage bottle to the fuel cell stack for power generation through pressure reduction and pressure regulation.

[0065] See also Figure 4 The figure shows a schematic structural diagram of a hydrogen fuel cell group power generation system in an embodiment of the present invention, a hydrogen fuel cell group power generation system, including a hydrogen supply system, at least two hydrogen fuel cell engines, a DC / DC converter and a DC / AC inverter, the hydrogen supply system is connected to the hydrogen fuel cell engine, one hydrogen fuel cell engine is respectively connected to a DC / DC converter, the DC / DC converter is connected to the DC / AC inverter through a switch, and an energy storage battery is also provided in parallel with the hydrogen fuel cell engine.

[0066] The energy storage battery is connected to the DC / AC inverter through the switch K0, and the DC / AC inverter is connected to the external power grid.

[0067] See Figure 5 Shown is a diagram of current density during the activation process in an embodiment of the present invention; and Figure 6The power change diagram of the activation process in the embodiment of the present invention is shown. In this embodiment, the power change in the activation process is calculated by inference based on the current density of the activation process set in advance, and the activation process of the stack is realized by controlling the stack power to change as required. In the embodiment of the present invention, a hydrogen fuel cell engine with a net output of 120kW is used, and the power is increased in a step-by-step manner, that is, the power generation power of the fuel cell stack is gradually increased by 12kW, from 0, 12kW, 24kW, 48kW, 50kW, 62kW, 74kW, 86kW, 98kW, 120kW, and each step power section runs for 30 seconds to complete a round of power increase process, and then repeats the power increase process once, and then performs step-by-step power reduction operation, which is 120kW, 74kW, 48kW, 12kW, 0, and each step power section runs for 60 seconds, so as to complete a complete online activation program. The activation condition is that the system inlet water temperature meets 70℃ and the air temperature is 70℃.

[0068] Finally, determine whether the difference in average voltage at 600A before stack activation and at 600A after activation is greater than 5V. If it is greater than 5V, the engine system activation is completed. If it is less than 5V, another round of online activation process is performed.

[0069] A method for activating a hydrogen fuel cell group power generation system in the present invention can not only ensure the external power supply of the power generation system as a whole, but also perform real-time online activation of the fuel cell stack at the same time, avoiding the traditional activation of disassembling the hydrogen fuel cell stack and eliminating the need for power outage and shutdown. The online activation method in the present application improves the efficiency and convenience of use; and in the application scenario where hydrogen fuel cells are used as power stations, the power generation hydrogen fuel cell group needs to generate electricity uninterruptedly in real time to provide the power grid with stable and sustainable electric energy, and can achieve the effect of not affecting the power supply and distribution system. The present application has positive significance in maintaining the performance status of the fuel cell and extending the life of the fuel cell stack.

[0070] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0071] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0072] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0073] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

Claims

1. A method for activating a hydrogen fuel cell group power generation system, characterized in that: The following steps are involved: S1, the hydrogen fuel cell group power generation system is in idle state and enters the online activation program state; S2, determine whether the SOC of the energy storage battery is not higher than 80% and not lower than 30%. If not, proceed to S3. If yes, proceed to S4. S3, when SOC is less than 30%, the hydrogen fuel cell group power generation system enters the power generation operation state and charges the energy storage battery to SOC ≥ 30%; when SOC is greater than 80%, the energy storage battery is used as a power source to be sent to the grid through the inverter for power supply until the energy storage battery SOC is no higher than 80%, and then enters the next step; S4, the hydrogen fuel cell group power generation system enters the activation waiting state; S5, checking whether the water temperature and air temperature entering the stack meet the predetermined temperature requirements. If not, proceed to S6. If yes, directly proceed to step S8. S6, start the control system thermal management cycle and proceed to the next step; S7, control the thermal management cycle of the control system to make the water temperature and air temperature entering the reactor reach the predetermined temperature, and then proceed to the next step; S8. According to the change of the current density of the control stack and the change of the power of the control stack, the online activation procedure is completed, including collecting the output power f(t) of the hydrogen fuel cell power generation system in the activated state and the output power h(t) of the hydrogen fuel cell power generation system in the non-activated state through the energy management controller, where h(t)=at 3 +bt 2 +ct+d, in kW, where t is time in seconds, a, b, c, d are all constants, and the predicted target power is G(t)=f(t)+h(t); In the step S8, a power calculation step of an energy storage battery is provided, and the power of the energy storage battery is h1(t)=a1t+b1, wherein t is time in seconds, and a1 and b1 are value constants, and the expected output power is calculated as G1(t)=G(t)+h1(t). After the expected output power is obtained, it is compared with the actual output power detected by the power meter, and the control deviation between the expected output power and the actual output power is made 0 through optimization control, that is, the expected output power is consistent with the actual output power, wherein when the difference between the predicted target power and the expected output power is greater than 5kW, the energy storage battery performs discharge work, and when the difference between the predicted target power and the expected output power is less than 5kW, the energy storage battery performs charging work, and enters the next step; S9, determine whether the voltage difference before and after activation of the hydrogen fuel cell group power generation system is greater than 3V, if not, adjust the humidity adjustment device to increase the air humidity, and return to step S8, if yes, proceed to the next step; S10, the activated hydrogen fuel cell group power generation system enters the standby state, and switches other units in sequence until all are completed before entering the next step; S11, determine whether the hydrogen fuel cell group power generation system has completed activation. If not, return to step S5. If so, end the online activation procedure.

2. The method for activating a hydrogen fuel cell group power generation system according to claim 1, characterized in that: In step S5, when the water temperature entering the hydrogen fuel cell system meets 70°C and the air temperature entering the stack meets 70°C, the process proceeds to step S8.

3. The method for activating a hydrogen fuel cell group power generation system according to claim 1, characterized in that: In step S11, it is determined whether the difference between the average voltage at 600A before system activation and the average voltage at 600A after system activation is greater than 5V. If it is greater than 5V, the activation of the hydrogen fuel cell group power generation system is completed. If it is less than 5V, steps S1 to S11 are repeated, and another round of online activation is performed until the activation conditions are met; or the voltage value of the hydrogen fuel cell group power generation system at 600A is controlled and detected, and then the voltage difference before and after activation is compared to see whether it is greater than 3V.

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