Startup control method and device for hydrogen fuel cell power generation system

Abstract

The present application relates to a start control method and device for a hydrogen fuel cell power generation system, which is applied to the fuel cell technology field. The method includes: starting the system, introducing hydrogen and air in a normal loading state, and setting the loading current A1; monitoring the single cell voltage; if the highest single cell voltage V < K1, starting normally; if K1 ≤ V < K2, reducing the loading current and increasing the introduced hydrogen; after operating for t1, returning to the normal loading state; if K2 ≤ V < K3, setting the loading current to A3, increasing the introduced hydrogen, and reducing the introduced air; after operating for t2, returning to the normal loading state; if V ≥ K3, setting the stack to an open circuit, setting the air inlet flow rate into the stack to 0, opening the air back pressure valve until the air pressure is equal to the atmospheric pressure; reducing the introduced hydrogen, opening the hydrogen tail discharge valve, and reducing the loading current after the hydrogen is continuously introduced for a preset time period; after operating for t3, returning to the normal loading state. It can inhibit the occurrence of the hydrogen-air interface.

Description

Technical Field

[0001] The present application relates to the field of fuel cell technology, and in particular to a startup control method and device for a hydrogen fuel cell power generation system. Background Art

[0002] As an efficient and clean energy conversion technology, hydrogen fuel cells have received widespread attention in the context of global energy structure adjustment and increased environmental awareness. The life of hydrogen fuel cells is a very important indicator. At present, although the life of hydrogen fuel cells has been greatly improved, during the startup phase of the hydrogen fuel cell power generation system, there is still a situation where the hydrogen-air interface appears in the stack. The hydrogen-air interface mainly occurs on the anode side of the stack. Due to the generation of the hydrogen-air interface at the anode, the high potential generated at the cathode causes carbon corrosion, which leads to the destruction of the catalyst layer structure, thereby adversely affecting charge transfer and mass transfer, and directly affecting the service life of the stack. Therefore, reducing and inhibiting the generation of hydrogen-air interfaces in the stack is of great significance to improving the life of the hydrogen fuel cell power generation system.

[0003] In the related art, hydrogen is directly introduced from the hydrogen pipeline when starting up, and the generation of hydrogen-air interface in the fuel cell stack is suppressed by increasing the hydrogen flow rate. However, this method cannot identify hydrogen-air interface conditions of different severity, and does not adopt different control strategies to effectively solve them. In addition, it is impossible to identify whether the hydrogen-air interface has been completely processed, and the system is still started directly without solving the hydrogen-air interface, which will affect the service life of the hydrogen fuel cell power generation system. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a startup control method, device, electronic device and storage medium for a hydrogen fuel cell power generation system.

[0005] According to a first aspect of the present application, a startup control method for a hydrogen fuel cell power generation system is provided, comprising:

[0006] Start the hydrogen fuel cell power generation system, introduce hydrogen and air into the hydrogen fuel cell power generation system according to a first hydrogen inlet flow rate V1, a first hydrogen inlet pressure P1, a first air inlet flow rate V1′, and a first air inlet pressure P1′, and set the load current to a first load current A1;

[0007] Monitoring the single-chip voltage of the fuel cell stack in the hydrogen fuel cell power generation system;

[0008] If the highest single-chip voltage is less than the first voltage value K1, the hydrogen fuel cell power generation system is controlled to start normally;

[0009] If the highest single-chip voltage is greater than or equal to the first voltage value K1 and less than the second voltage value K2, the load current is set to the second load current A2, and hydrogen is introduced into the hydrogen fuel cell power generation system according to the second hydrogen inlet flow rate V2 and the second hydrogen inlet pressure P2; A2< A1, V2> V1, P2> P1;

[0010] After the first time period t1, return to the step of introducing hydrogen and air into the hydrogen fuel cell power generation system according to the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′, and setting the load current to the first load current A1;

[0011] If the highest single-chip voltage is greater than or equal to the second voltage value K2 and less than the third voltage value K3, the pull-load current is set to the third pull-load current A3, and hydrogen and air are introduced into the hydrogen fuel cell power generation system according to the third hydrogen inlet flow rate V3, the third hydrogen inlet pressure P3, the second air inlet flow rate V2′, and the second air inlet pressure P2′; A3< A2, V3> V2, P3> P2, V2′< V1′, P2′< P1′;

[0012] After the second time period t2, return to the step of introducing hydrogen and air into the hydrogen fuel cell power generation system according to the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′, and setting the load current to the first load current A1;

[0013] If the highest single-chip voltage is greater than or equal to the third voltage value K3, the stack is set to an open circuit state, the air compressor is turned off, the air inlet flow rate is set to 0, the air back pressure valve is fully opened, and the back pressure valve is closed when the air pressure in the stack is equal to the atmospheric pressure; hydrogen is introduced into the hydrogen fuel cell power generation system according to the fourth hydrogen inlet flow rate V4 and the fourth hydrogen inlet pressure P4, and the hydrogen tail exhaust valve is fully opened. After hydrogen is continuously introduced for a preset time period, the load current is set to the fourth load current A4; A4< A3, V4> V3, P4> P3;

[0014] After running for the third time period t3, return to the step of introducing hydrogen and air into the hydrogen fuel cell power generation system according to the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′, and setting the load current to the first load current A1.

[0015] Optionally, the first load current A1 is 50A, the second load current A2 is 40A, the third load current A3 is 20A, and the fourth load current A4 is 10A.

[0016] Optionally, the first hydrogen gas entering the stack pressure P1 is 30 kPa, the second hydrogen gas entering the stack pressure P2 is 40 kPa, the third hydrogen gas entering the stack pressure P3 is 50 kPa, and the fourth hydrogen gas entering the stack pressure P4 is 60 kPa.

[0017] Optionally, the first air entering the stack pressure P1′ is 50 kPa, and the second air entering the stack pressure P2′ is 20 kPa.

[0018] Optionally, the first time period t1<the second time period t2<the third time period t3.

[0019] According to a second aspect of the present application, a startup control device for a hydrogen fuel cell power generation system is provided, comprising:

[0020] A system startup module, used to start the hydrogen fuel cell power generation system;

[0021] A normal loading module, used to introduce hydrogen and air into the hydrogen fuel cell power generation system according to a first hydrogen inlet flow rate V1, a first hydrogen inlet pressure P1, a first air inlet flow rate V1′, and a first air inlet pressure P1′, and set the loading current to a first loading current A1;

[0022] A single-chip voltage monitoring module, used to monitor the single-chip voltage of the stack in the hydrogen fuel cell power generation system;

[0023] A normal start-up module, used to control the hydrogen fuel cell power generation system to start normally if the highest single-chip voltage monitored by the single-chip voltage monitoring module is less than the first voltage value K1;

[0024] The first adjustment module is used to set the load current to the second load current A2 if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the first voltage value K1 and less than the second voltage value K2, and to introduce hydrogen into the hydrogen fuel cell power generation system according to the second hydrogen inlet flow rate V2 and the second hydrogen inlet pressure P2; after running for the first time period t1, return to the normal load module; A2< A1, V2> V1, P2> P1;

[0025] The second adjustment module is used to set the load current to the third load current A3 if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the second voltage value K2 and less than the third voltage value K3, and introduce hydrogen and air into the hydrogen fuel cell power generation system according to the third hydrogen inlet flow rate V3, the third hydrogen inlet pressure P3, the second air inlet flow rate V2′, and the second air inlet pressure P2′; after running for the second time period t2, return to the normal load module; A3< A2, V3> V2, P3> P2, V2′< V1′, P2′< P1′;

[0026] The third adjustment module is used to set the fuel cell stack to an open circuit state, turn off the air compressor, set the air inlet flow rate to 0, open all the air back-pressure valves, and close the back-pressure valve when the air pressure in the fuel cell stack is equal to the atmospheric pressure if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the third voltage value K3; if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the third voltage value K3, the stack is set to an open circuit state, the air compressor is turned off, the air inlet flow rate is set to 0, the air back-pressure valves are fully opened, and the back-pressure valves are closed when the air pressure in the fuel cell stack is equal to the atmospheric pressure; hydrogen is introduced into the hydrogen fuel cell power generation system according to the fourth hydrogen inlet flow rate V4 and the fourth hydrogen inlet pressure P4, and the hydrogen tail exhaust valves are fully opened, and after the hydrogen is continuously introduced for a preset time period, the load current is set to the fourth load current A4; after running for the third time period t3, the normal load module is returned; A4< A3, V4> V3, P4> P3.

[0027] Optionally, the first load current A1 is 50A, the second load current A2 is 40A, the third load current A3 is 20A, and the fourth load current A4 is 10A.

[0028] Optionally, the first hydrogen gas entering the stack pressure P1 is 30 kPa, the second hydrogen gas entering the stack pressure P2 is 40 kPa, the third hydrogen gas entering the stack pressure P3 is 50 kPa, and the fourth hydrogen gas entering the stack pressure P4 is 60 kPa.

[0029] Optionally, the first air entering the stack pressure P1′ is 50 kPa, and the second air entering the stack pressure P2′ is 20 kPa.

[0030] Optionally, the first time period t1<the second time period t2<the third time period t3.

[0031] According to a third aspect of the present application, an electronic device is provided, comprising: a processor, wherein the processor is configured to execute a computer program stored in a memory, wherein the computer program implements the method described in the first aspect when executed by the processor.

[0032] According to a fourth aspect of the present application, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the method described in the first aspect is implemented.

[0033] According to a fifth aspect of the present application, a computer program product is provided. When the computer program product is run on a computer, the computer is enabled to execute the method described in the first aspect.

[0034] Compared with the prior art, the technical solution provided by the embodiments of the present application has the following advantages:

[0035] In the process of starting the hydrogen fuel cell power generation system, the different degrees of hydrogen-air interface in the stack can be identified according to the highest single-chip voltage. If the highest single-chip voltage is greater than or equal to V1 and less than V2, it means that the degree of hydrogen-air interface in the stack is relatively light. By increasing the hydrogen flow rate and hydrogen flow pressure to a larger value, the air in the hydrogen path is blown as clean as possible, and the air on the air side is inhibited from diffusing to the hydrogen side. At the same time, reducing the load current to a smaller value can reduce the damage to the stack caused by the presence of the hydrogen-air interface. After running the first time period t1, the fuel cell power generation system is restored to a normal load state, and the hydrogen-air interface is re-detected. If the highest single-chip voltage is greater than or equal to V2 and less than V3, it means that the degree of hydrogen-air interface in the stack is relatively serious. While increasing the hydrogen flow rate and hydrogen flow pressure to a larger value, reduce the air flow rate and air flow pressure to reduce the air in the stack, and further reduce the air diffusion to the hydrogen side. Reducing the load current to a smaller value can reduce the damage to the stack caused by the presence of the hydrogen-air interface. After running the second time period t2, the fuel cell power generation system is restored to a normal loading state, and the hydrogen-air interface is re-detected. If the highest single-chip voltage is greater than or equal to V3, it means that the degree of hydrogen-air interface in the stack is already very serious, the air can be cut off, and there must be no pressure on the air side, so that the air no longer has the ability to diffuse to the hydrogen side. Further increasing the hydrogen inlet flow rate and hydrogen inlet pressure can completely remove the air on the hydrogen side, so that the serious hydrogen-air interface can be quickly eliminated, reducing damage to the stack. After running the third time period t3, the fuel cell power generation system is restored to a normal loading state, and the hydrogen-air interface is re-detected. It can be seen that different control strategies can be implemented for different degrees of hydrogen-air interface to quickly suppress the continued appearance of the hydrogen-air interface. It can effectively solve the attenuation of the stack life caused by the hydrogen-air interface during the startup of the hydrogen fuel cell power generation system, and improve the service life of the stack. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0038] Figure 1 A flow chart of a start-up control method of a hydrogen fuel cell power generation system in an embodiment of the present application;

[0039] Figure 2This is a structural schematic diagram of a start-up control device for a hydrogen fuel cell power generation system in an embodiment of the present application. DETAILED DESCRIPTION

[0040] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the scheme of the present application will be further described below. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0041] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the present application, rather than all of the embodiments.

[0042] See also Figure 1 , Figure 1 This is a flow chart of a startup control method of a hydrogen fuel cell power generation system in an embodiment of the present application, which may include the following steps:

[0043] Step S102, start the hydrogen fuel cell power generation system,

[0044] Step S104, hydrogen and air are introduced into the hydrogen fuel cell power generation system according to the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′, and the load current is set to the first load current A1.

[0045] When starting the hydrogen fuel cell power generation system, the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′ are parameter values ​​under normal loading state. The set hydrogen inlet flow rate and air inlet flow rate will be different depending on the power of the fuel cell. Therefore, the hydrogen inlet flow rate and the air inlet flow rate can be set according to the power of the fuel cell. Optionally, the first loading current A1 is 50A, the first hydrogen inlet pressure P1 is 30kPa, and the first air inlet pressure P1′ is 50kPa.

[0046] Step S106, monitoring the single-chip voltage of the fuel cell stack in the hydrogen fuel cell power generation system.

[0047] The severity of the hydrogen-air interface in the stack can be determined based on the single-chip voltage of the stack. The higher the maximum single-chip voltage, the more serious the hydrogen-air interface; the lower the maximum single-chip voltage, the less serious the hydrogen-air interface. Therefore, the severity of the hydrogen-air interface can be determined by monitoring the single-chip voltage of the stack.

[0048] Step S108, determining whether the highest single-chip voltage is less than the first voltage value K1.

[0049] If the highest single chip voltage is less than the first voltage value K1, it can be considered that no hydrogen-air interface appears, and step S110 is executed; if the highest single chip voltage is greater than or equal to the first voltage value K1, step S112 is executed.

[0050] Step S110, controlling the hydrogen fuel cell power generation system to start normally.

[0051] Step S112, determining whether the highest single-chip voltage is less than the second voltage value K2.

[0052] If the highest single chip voltage is less than the second voltage value K2, it indicates that the degree of the hydrogen-air interface is relatively light, and step S114 is executed; if the highest single chip voltage is greater than or equal to the second voltage value K2, step S116 is executed.

[0053] Step S114, set the load current to the second load current A2, and introduce hydrogen into the hydrogen fuel cell power generation system according to the second hydrogen inlet flow rate V2 and the second hydrogen inlet pressure P2, run the first time period t1, and return to step S104; A2< A1, V2> V1, P2> P1.

[0054] By increasing the hydrogen flow rate into the stack, the hydrogen pipeline can be purged, and the air in the hydrogen pipeline can be blown as clean as possible. Increasing the hydrogen inlet pressure can inhibit the diffusion of air from the air side to the hydrogen side, thereby inhibiting the continued appearance of the hydrogen-air interface. When the hydrogen-air interface exists, it will cause damage to the fuel cell stack. The more serious the hydrogen-air interface is, the smaller the corresponding load current is, and the smaller the damage to the fuel cell stack will be. Therefore, by reducing the load current, the damage to the fuel cell stack can be reduced. Optionally, the second load current A2 is 40A, and the second hydrogen inlet pressure P2 is 40kPa.

[0055] Since the hydrogen-air interface is relatively mild, the hydrogen-air interface can usually be resolved after the first period of time t1, and the process returns to step S104 to restore the fuel cell power generation system to a normal loading state to re-detect whether the hydrogen-air interface is eliminated. If the hydrogen-air interface is eliminated, the hydrogen fuel cell power generation system is controlled to start normally. Otherwise, the above cycle process is continued.

[0056] Step S116, determining whether the highest single-chip voltage is less than the third voltage value K3.

[0057] If the highest single chip voltage is less than the third voltage value K3, it indicates that the degree of the hydrogen-air interface is relatively serious, and step S118 is executed; if the highest single chip voltage is greater than or equal to the third voltage value K3, it indicates that the degree of the hydrogen-air interface is already very serious, and step S120 is executed.

[0058] Step S118: Set the draw current to the third draw current A3, and introduce hydrogen and air into the hydrogen fuel cell power generation system according to the third hydrogen inlet flow rate V3, the third hydrogen inlet pressure P3, the second air inlet flow rate V2′, and the second air inlet pressure P2′. Operate for the second time period t2, and then return to step S104.

[0059] Since the degree of the hydrogen-air interface appearance is relatively serious, therefore, compared with step S112, the increase in the hydrogen inlet flow rate and the hydrogen inlet pressure will be stronger, V3 > V2, P3 > P2. Optionally, the third hydrogen inlet pressure P3 is 50 kPa. At the same time, reducing the air inlet flow rate and the air inlet pressure can reduce the air in the stack and further reduce the diffusion of air to the hydrogen side. V2′ < V1′, P2′ < P1′. Optionally, the second air inlet pressure P2′ is 20 kPa. In this way, the continuous appearance of the hydrogen-air interface can be more effectively suppressed. Set the draw current to a smaller value, that is, A3 < A2, which can reduce the damage caused by the hydrogen-air interface to the stack. Optionally, the third draw current A3 is 20 A.

[0060] Similarly, after operating for the second time period t2, return to step S104 to restore the fuel cell power generation system to the normal draw state, and re-detect whether the hydrogen-air interface is eliminated. In the case of eliminating the hydrogen-air interface, control the hydrogen fuel cell power generation system to start normally. Otherwise, continue to execute the above loop process.

[0061] Step S120: Set the stack to the open circuit state, turn off the air compressor, set the air inlet flow rate to 0, fully open the air back pressure valve, and close the back pressure valve when the pressure of the air in the stack is equal to the atmospheric pressure; introduce hydrogen into the hydrogen fuel cell power generation system according to the fourth hydrogen inlet flow rate V4 and the fourth hydrogen inlet pressure P4, and fully open the hydrogen tail exhaust valve. After hydrogen is continuously introduced for a preset time period, set the draw current to the fourth draw current A4. Operate for the third time period t3, and then return to step S104.

[0062] Since the degree of the hydrogen-air interface appearance is already very serious, therefore, the air can be cut off, and there should be no pressure on the air side to ensure that the air no longer has the ability to diffuse to the hydrogen side. And the hydrogen inlet flow rate and the hydrogen inlet pressure also increase, V4 > V3, P4 > P3. Optionally, the fourth hydrogen inlet pressure P4 is 60 kPa. In this way, all the air on the hydrogen side can be completely removed, enabling the serious hydrogen-air interface to be quickly eliminated and reducing the damage to the stack. Set the draw current to a smaller value, A4 < A3, which can reduce the damage caused by the hydrogen-air interface to the stack. Optionally, the fourth draw current A4 is 10 A.

[0063] After the third period of time t3, the system returns to step S104 to restore the fuel cell power generation system to a normal loading state to re-detect whether the hydrogen-air interface is eliminated. If the hydrogen-air interface is eliminated, the hydrogen fuel cell power generation system is controlled to start normally. Otherwise, the above cycle is continued.

[0064] The embodiment of the present application can also set different hydrogen circulation times according to different degrees of hydrogen-air interface. The more serious the hydrogen-air interface is, the longer the hydrogen circulation time can be. Optionally, the first time period t1 < the second time period t2 < the third time period t3. In this way, by increasing the hydrogen circulation time, the air on the clean hydrogen side can be removed as much as possible, so that the serious hydrogen-air interface can be quickly eliminated. For example, t1 is 20s, t2 is 40s, and t3 is 60s.

[0065] The startup control method of the hydrogen fuel cell power generation system of the embodiment of the present application can identify the different degrees of hydrogen-air interface in the stack according to the highest single-chip voltage during the startup of the hydrogen fuel cell power generation system. If the highest single-chip voltage is greater than or equal to V1 and less than V2, it means that the degree of hydrogen-air interface in the stack is relatively light. By increasing the hydrogen flow rate and hydrogen flow pressure to a larger value, the air in the hydrogen path is blown as clean as possible, and the air on the air side is inhibited from diffusing to the hydrogen side. At the same time, reducing the load current to a smaller value can reduce the damage to the stack caused by the presence of the hydrogen-air interface. After running the first time period t1, the fuel cell power generation system is restored to a normal load state, and the hydrogen-air interface is re-detected. If the highest single-chip voltage is greater than or equal to V2 and less than V3, it means that the degree of hydrogen-air interface in the stack is relatively serious. While increasing the hydrogen flow rate and hydrogen flow pressure to a larger value, the air flow rate and air flow pressure are reduced to reduce the air in the stack, and the air in the stack is further reduced to reduce the air diffusion to the hydrogen side. Reducing the load current to a smaller value can reduce the damage to the stack caused by the presence of the hydrogen-air interface. After running the second time period t2, the fuel cell power generation system is restored to a normal loading state, and the hydrogen-air interface is re-detected. If the highest single-chip voltage is greater than or equal to V3, it means that the degree of hydrogen-air interface in the stack is already very serious, the air can be cut off, and there must be no pressure on the air side, so that the air no longer has the ability to diffuse to the hydrogen side. Further increasing the hydrogen inlet flow rate and hydrogen inlet pressure can completely remove the air on the hydrogen side, so that the serious hydrogen-air interface can be quickly eliminated, reducing damage to the stack. After running the second time period t2, the fuel cell power generation system is restored to a normal loading state, and the hydrogen-air interface is re-detected. It can be seen that different control strategies can be implemented for different degrees of hydrogen-air interface to quickly suppress the continued appearance of the hydrogen-air interface. It can effectively solve the attenuation of the stack life caused by the hydrogen-air interface during the startup of the hydrogen fuel cell power generation system and improve the service life of the stack.

[0066] The present application also provides a startup control device for a hydrogen fuel cell power generation system. Figure 2 The start-up control device 200 of the hydrogen fuel cell power generation system includes:

[0067] A system startup module 202 is used to start the hydrogen fuel cell power generation system;

[0068] The normal loading module 204 is used to introduce hydrogen and air into the hydrogen fuel cell power generation system according to the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′, and set the loading current to the first loading current A1;

[0069] The single chip voltage monitoring module 206 is used to monitor the single chip voltage of the fuel cell stack in the hydrogen fuel cell power generation system;

[0070] The normal start module 208 is used to control the hydrogen fuel cell power generation system to start normally if the highest single-chip voltage monitored by the single-chip voltage monitoring module is less than the first voltage value K1;

[0071] The first adjustment module 210 is used to set the load current to the second load current A2 if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the first voltage value K1 and less than the second voltage value K2, and to introduce hydrogen into the hydrogen fuel cell power generation system according to the second hydrogen inlet flow rate V2 and the second hydrogen inlet pressure P2; after running for the first time period t1, return to the normal load module 204; A2< A1, V2> V1, P2> P1;

[0072] The second adjustment module 212 is used to set the load current to the third load current A3 if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the second voltage value K2 and less than the third voltage value K3, and introduce hydrogen and air into the hydrogen fuel cell power generation system according to the third hydrogen inlet flow rate V3, the third hydrogen inlet pressure P3, the second air inlet flow rate V2′, and the second air inlet pressure P2′; after running for the second time period t2, return to the normal load module 204; A3< A2, V3> V2, P3> P2, V2′< V1′, P2′< P1′;

[0073] The third adjustment module 214 is used to set the fuel cell stack to an open circuit state, turn off the air compressor, set the air inlet flow rate to 0, open all the air back-pressure valves, and close the back-pressure valve when the air pressure in the fuel cell stack is equal to the atmospheric pressure if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the third voltage value K3; if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the third voltage value K3, the stack is set to an open circuit state, the air compressor is turned off, the air inlet flow rate is set to 0, the air back-pressure valves are fully opened, and the back-pressure valves are closed when the air pressure in the fuel cell stack is equal to the atmospheric pressure; hydrogen is introduced into the hydrogen fuel cell power generation system according to the fourth hydrogen inlet flow rate V4 and the fourth hydrogen inlet pressure P4, and the hydrogen tail exhaust valves are fully opened, and after the hydrogen is continuously introduced for a preset time period, the load current is set to the fourth load current A4; after running for the third time period t3, return to the normal load module 204; A4< A3, V4> V3, P4> P3.

[0074] Optionally, the first load current A1 is 50A, the second load current A2 is 40A, the third load current A3 is 20A, and the fourth load current A4 is 10A.

[0075] Optionally, the first hydrogen gas entering the stack pressure P1 is 30 kPa, the second hydrogen gas entering the stack pressure P2 is 40 kPa, the third hydrogen gas entering the stack pressure P3 is 50 kPa, and the fourth hydrogen gas entering the stack pressure P4 is 60 kPa.

[0076] Optionally, the first air entering the stack pressure P1 ′ is 50 kPa, and the second air entering the stack pressure P2 ′ is 20 kPa.

[0077] Optionally, the first time period t1<the second time period t2<the third time period t3.

[0078] The specific details of each module or unit in the above device have been described in detail in the corresponding method, so they will not be repeated here.

[0079] It should be noted that, although several modules or units of the equipment for action execution are mentioned in the above detailed description, this division is not mandatory. In fact, according to the embodiments of the present application, the features and functions of two or more modules or units described above can be embodied in one module or unit. On the contrary, the features and functions of one module or unit described above can be further divided into being embodied by multiple modules or units.

[0080] An embodiment of the present application also provides an electronic device, comprising: a processor; a memory for storing instructions executable by the processor; wherein the processor is configured to execute the startup control method of the hydrogen fuel cell power generation system in the present example embodiment.

[0081] An embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the startup control method of the above-mentioned hydrogen fuel cell power generation system is implemented.

[0082] It should be noted that the computer-readable storage medium shown in the present application may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, radio frequency, etc., or any suitable combination of the above.

[0083] The embodiment of the present application also provides a computer program product. When the computer program product is run on a computer, the computer executes the startup control method of the above-mentioned hydrogen fuel cell power generation system.

[0084] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0085] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A startup control method for a hydrogen fuel cell power generation system, characterized in that: include: Start the hydrogen fuel cell power generation system, introduce hydrogen and air into the hydrogen fuel cell power generation system according to a first hydrogen inlet flow rate V1, a first hydrogen inlet pressure P1, a first air inlet flow rate V1′, and a first air inlet pressure P1′, and set the load current to a first load current A1; Monitoring the single-chip voltage of the fuel cell stack in the hydrogen fuel cell power generation system; If the highest single-chip voltage is less than the first voltage value K1, the hydrogen fuel cell power generation system is controlled to start normally; If the highest single-chip voltage is greater than or equal to the first voltage value K1 and less than the second voltage value K2, the load current is set to the second load current A2, and hydrogen is introduced into the hydrogen fuel cell power generation system according to the second hydrogen inlet flow rate V2 and the second hydrogen inlet pressure P2; A2< A1, V2> V1, P2> P1; After the first time period t1, return to the step of introducing hydrogen and air into the hydrogen fuel cell power generation system according to the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′, and setting the load current to the first load current A1; If the highest single-chip voltage is greater than or equal to the second voltage value K2 and less than the third voltage value K3, the load current is set to the third load current A3, and hydrogen and air are introduced into the hydrogen fuel cell power generation system according to the third hydrogen inlet flow rate V3, the third hydrogen inlet pressure P3, the second air inlet flow rate V2′, and the second air inlet pressure P2′; A3< A2, V3> V2, P3> P2, V2′< V1′, P2′< P1′; After the second time period t2, return to the step of introducing hydrogen and air into the hydrogen fuel cell power generation system according to the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′, and setting the load current to the first load current A1; If the highest single-chip voltage is greater than or equal to the third voltage value K3, the stack is set to an open circuit state, the air compressor is turned off, the air inlet flow rate is set to 0, the air back pressure valve is fully opened, and the back pressure valve is closed when the air pressure in the stack is equal to the atmospheric pressure; hydrogen is introduced into the hydrogen fuel cell power generation system according to the fourth hydrogen inlet flow rate V4 and the fourth hydrogen inlet pressure P4, and the hydrogen tail exhaust valve is fully opened. After hydrogen is continuously introduced for a preset time period, the load current is set to the fourth load current A4; A4< A3, V4> V3, P4> P3; After running for the third time period t3, return to the step of introducing hydrogen and air into the hydrogen fuel cell power generation system according to the first hydrogen inlet flow rate V1, the first hydrogen inlet pressure P1, the first air inlet flow rate V1′, and the first air inlet pressure P1′, and setting the load current to the first load current A1.

2. The method according to claim 1, characterized in that The first load current A1 is 50A, the second load current A2 is 40A, the third load current A3 is 20A, and the fourth load current A4 is 10A.

3. The method according to claim 1, characterized in that The first hydrogen gas entering the stack pressure P1 is 30 kPa, the second hydrogen gas entering the stack pressure P2 is 40 kPa, the third hydrogen gas entering the stack pressure P3 is 50 kPa, and the fourth hydrogen gas entering the stack pressure P4 is 60 kPa.

4. The method according to claim 1, characterized in that: The first air entering the stack pressure P1' is 50 kPa, and the second air entering the stack pressure P2' is 20 kPa.

5. The method according to claim 1, characterized in that The first time period t1<the second time period t2<the third time period t3.

6. A startup control device for a hydrogen fuel cell power generation system, characterized in that: include: A system startup module, used to start the hydrogen fuel cell power generation system; A normal loading module, used to introduce hydrogen and air into the hydrogen fuel cell power generation system according to a first hydrogen inlet flow rate V1, a first hydrogen inlet pressure P1, a first air inlet flow rate V1′, and a first air inlet pressure P1′, and set the loading current to a first loading current A1; A single-chip voltage monitoring module, used to monitor the single-chip voltage of the stack in the hydrogen fuel cell power generation system; A normal start-up module, used to control the hydrogen fuel cell power generation system to start normally if the highest single-chip voltage monitored by the single-chip voltage monitoring module is less than the first voltage value K1; The first adjustment module is used to set the load current to the second load current A2 if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the first voltage value K1 and less than the second voltage value K2, and to introduce hydrogen into the hydrogen fuel cell power generation system according to the second hydrogen inlet flow rate V2 and the second hydrogen inlet pressure P2; after running for the first time period t1, return to the normal load module; A2< A1, V2> V1, P2> P1; The second adjustment module is used to set the load current to the third load current A3 if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the second voltage value K2 and less than the third voltage value K3, and introduce hydrogen and air into the hydrogen fuel cell power generation system according to the third hydrogen inlet flow rate V3, the third hydrogen inlet pressure P3, the second air inlet flow rate V2′, and the second air inlet pressure P2′; after running for the second time period t2, return to the normal load module; A3< A2, V3> V2, P3> P2, V2′< V1′, P2′< P1′; The third adjustment module is used to set the fuel cell stack to an open circuit state, turn off the air compressor, set the air inlet flow rate to 0, open all the air back-pressure valves, and close the back-pressure valve when the air pressure in the fuel cell stack is equal to the atmospheric pressure if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the third voltage value K3; if the highest single-chip voltage monitored by the single-chip voltage monitoring module is greater than or equal to the third voltage value K3, the stack is set to an open circuit state, the air compressor is turned off, the air inlet flow rate is set to 0, the air back-pressure valves are fully opened, and the back-pressure valves are closed when the air pressure in the fuel cell stack is equal to the atmospheric pressure; hydrogen is introduced into the hydrogen fuel cell power generation system according to the fourth hydrogen inlet flow rate V4 and the fourth hydrogen inlet pressure P4, and the hydrogen tail exhaust valves are fully opened, and after the hydrogen is continuously introduced for a preset time period, the load current is set to the fourth load current A4; after running for the third time period t3, the normal load module is returned; A4< A3, V4> V3, P4> P3.

7. The device according to claim 6, characterized in that The first load current A1 is 50A, the second load current A2 is 40A, the third load current A3 is 20A, and the fourth load current A4 is 10A.

8. The device according to claim 6, characterized in that The first hydrogen gas entering the stack pressure P1 is 30 kPa, the second hydrogen gas entering the stack pressure P2 is 40 kPa, the third hydrogen gas entering the stack pressure P3 is 50 kPa, and the fourth hydrogen gas entering the stack pressure P4 is 60 kPa.

9. The device according to claim 6, characterized in that The first air entering the stack pressure P1' is 50 kPa, and the second air entering the stack pressure P2' is 20 kPa.

10. The device according to claim 6, characterized in that The first time period t1<the second time period t2<the third time period t3.

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