Multi-system parallel grouping matching control method for fuel cell power station

Abstract

The invention relates to the technical field of fuel cell power stations, in particular to a fuel cell power station multi-system parallel grouping matching control method, which comprises the following steps: firstly, installing resistors for group number distribution in power station subsystems, then, carrying out automatic group number distribution according to a subsystem grouping control program, and carrying out CAN communication ID distribution according to a CAN communication ID distribution program, after group number configuration is completed, the power station control system and the power generation subsystem both record configuration results, and group numbers are not configured repeatedly when the system is started next time, so that a plurality of completely same modularized kilowatt-level fuel cell power generation systems are connected in parallel at will, solidification in advance in the production process is not needed, the production efficiency is greatly improved, and the production cost is reduced. And the inventory management cost and the mistake proofing cost are reduced. According to the invention, after the fuel cell power station is installed, the sub-system group number distribution and ID distribution are automatically carried out, and after one sub-system is replaced, the beneficial technical effects of automatic adaptation can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel cell power stations, and in particular to a multi-system parallel grouping matching control method for a fuel cell power station. Background Art

[0002] Energy is one of the main material foundations supporting the development of modern civilized society. Every energy revolution in history has greatly promoted the development of modern civilization. The hydrogen fuel cell power generation system can directly convert hydrogen into electrical energy. It does not require the energy form change through boilers, turbines, and generators in conventional thermal power generation devices. It has higher energy conversion efficiency and lower environmental impact, which fully meets the urgent global demand for clean energy and sustainable development.

[0003] Most domestic companies that have entered the fuel cell power generation field have started with fuel cell vehicle applications. Fuel cell power generation systems are more commonly found in kilowatt-level products. As a power generation device, hydrogen fuel cells have higher power requirements, such as megawatts. This requires multiple kilowatt-level systems to be connected in parallel to meet the demand for greater power.

[0004] By combining multiple kilowatt-level fuel cell power generation systems in parallel to achieve the goal of a megawatt-level fuel cell power station, the parallel design involves the need to group and manage multiple subsystems, which involves subsystem group number management, CAN communication ID allocation, etc. At present, the industry usually adopts the method of completing the group number allocation in advance and solidifying the software in parallel according to the specified requirements. Since the group number is pre-assigned and cannot be changed, the installation position of the subsystem cannot be changed. Since the CAN communication ID needs to be distinguished, the control software needs to have multiple versions of the program, which makes it impossible to perform modular management of the subsystem. When performing inventory management, it is necessary to store according to the subsystem label. When installing in the power station, it needs to be installed in the specified order, which brings production and inventory management costs and error prevention costs. Summary of the invention

[0005] The purpose of the present invention is to address the problems existing in the background technology and to propose a multi-system parallel group matching control method for a fuel cell power station.

[0006] The technical solution of the present invention is a multi-system parallel group matching control method for a fuel cell power station, comprising the following specific implementation steps:

[0007] S1. When installing a fuel cell power station, several kilowatt-class fuel cell power generation subsystems are electrically connected in parallel, and a resistor with a resistance value of R for group number assignment is added to the power generation subsystem. Then, several power generation subsystems with added group number assignment resistors are connected in series through a control harness, and the power generation subsystem communicates with the power station control system through the CAN bus;

[0008] S2. After the fuel cell power station is installed, when the power station control system and the power generation sub-system are powered on and start working, the power station control system first detects whether the power generation sub-system needs to be configured with a group number. If the power generation sub-system is not configured with a group number, the power generation sub-system enters a receive-only mode before the group number and ID are assigned, that is, it does not send CAN messages, but only receives control commands from the power station control system;

[0009] S3, power station control system detection total resistance R total , determine that the power station has N = R total / R generating subsystems, and send the number of generating subsystems N to all generating subsystems through the CAN bus, and send a subsystem group number allocation command;

[0010] S4, after receiving the group number allocation command, each sub-system performs group resistance value detection, and confirms its own position based on the resistance value detected by itself;

[0011] S5. After each power generation subsystem confirms its own position, it writes its own position into the memory of its own control unit. After that, each power generation subsystem automatically allocates a CAN communication ID and sends a power generation subsystem status information message to the power station control system through the CAN bus, reporting its own group number;

[0012] S6. After the power generation subsystem completes the group number allocation and CAN communication ID allocation, the power station control system verifies whether the group number and ID number reported by the power generation subsystem are consistent. If there is a mismatch, repeat the above S2 to S5. If the group number and ID number reported by the power generation subsystem match, the configuration of the power station control system and each power generation subsystem is completed, and the power station control system and each power generation subsystem enter the normal working mode.

[0013] Preferably, the method for the power generation sub-system to confirm its own position based on the resistance value detected by itself is: the first power generation sub-system detects a resistance value of R, confirming its own position as R / R=1, the second power generation sub-system detects a resistance value of 2R, confirming its own position as 2R / R=2, ..., the Nth power generation sub-system detects a resistance value of NR, confirming its own position as NR / R=N.

[0014] Preferably, the method for automatically allocating CAN communication IDs for each transmitting sub-system is as follows: the default ID of the transmitting sub-system status information message is 0x100. After confirming its own group number, the first transmitting sub-system sets the status message ID to 0x110, the second transmitting sub-system sets the status message ID to 0x120, ..., and the Nth transmitting sub-system sets the status message ID to 0x1N0.

[0015] Preferably, after the power station control system and each power generation subsystem are configured, the power station control system and the power generation subsystem both record the configuration results, and after the configuration is successful, the configuration group number is not repeated the next time the system is started.

[0016] Preferably, if a power generation subsystem needs to be replaced due to a fault, after replacing the faulty power generation subsystem with a new power generation subsystem, the power station control system and the power generation subsystem reallocate group numbers and IDs, and after the allocation is completed, the fuel cell power station can operate normally.

[0017] Preferably, if a power generation subsystem fails but cannot be replaced, the failed power generation subsystem will be removed from the power station system, and the group number allocation harness will be connected across the failed power generation subsystem. The power station control system confirms the number of power generation subsystems and the power station power based on the detected resistance value. Thereafter, the power station control system and the power generation subsystem reallocate the group number and ID. After the allocation is completed, the fuel cell power station can operate normally.

[0018] Compared with the prior art, the above technical solution of the present invention has the following beneficial technical effects:

[0019] The present invention designs a multi-system parallel grouping matching control method for a fuel cell power station. The method first installs a resistor for group number allocation in the power station subsystem, then automatically allocates group numbers according to the subsystem grouping control program, and allocates CAN communication IDs according to the CAN communication ID allocation program. After the group number configuration is completed, the power station control system and the power generation subsystem both record the configuration results, and the group number is not repeatedly configured when the system is started next time, thereby achieving arbitrary parallel connection of multiple completely identical modular kilowatt-level fuel cell power generation systems without the need for pre-solidification during the production process, greatly improving production efficiency, reducing inventory management costs and error prevention costs, and achieving the beneficial technical effects of automatically allocating subsystem group numbers and IDs after the power station is installed, and automatically adapting after replacing one of the power generation subsystems. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A system principle diagram of a multi-system parallel group matching control method for a fuel cell power station proposed by the present invention;

[0021] Figure 2 This is a flow chart of a multi-system parallel group matching control method for a fuel cell power station proposed by the present invention. DETAILED DESCRIPTION

[0022] Embodiment 1, the present invention proposes a fuel cell power station multi-system parallel group matching control method, the above method includes the following specific implementation steps:

[0023] Initialization phase:

[0024] like Figure 1 As shown, when the fuel cell power station is installed, N (N≥2) kilowatt-class fuel cell power generation subsystems (hereinafter referred to as power generation subsystems) are electrically connected in parallel, and multiple fuel cell power generation subsystems simultaneously output electrical energy to increase the power output capacity of the overall system and meet the power generation demand of the fuel cell power station. Then, a group number allocation resistor is added to the fuel cell power generation subsystem, and the resistance value is defined as R. The N power generation subsystems with the added group number allocation resistor are then connected in series through the control harness, and the fuel cell power generation subsystem communicates with the fuel cell power station control system (hereinafter referred to as the power station control system) through the CAN (Controller Area Network) bus;

[0025] Group control stage:

[0026] like Figure 2 As shown, after the fuel cell power station is installed, the power station control system and the power station subsystem automatically execute the subsystem group number allocation and ID allocation procedures, and the implementation steps are as follows:

[0027] S1. When the power station control system and the power generation sub-system are powered on and start working, the power station control system first detects whether the power generation sub-system needs to be configured with a group number. If the power generation sub-system is not configured with a group number, the power generation sub-system enters a receive-only mode before the group number and ID are assigned, that is, it does not send CAN messages (to prevent message ID conflicts) and only receives control commands from the power station control system;

[0028] S2, power station control system detection total resistance R total , determine that the fuel cell power station has a total of N = R total / R generator subsystems, and send the number of generator subsystems N to all generator subsystems through the CAN bus, and send a group number allocation command to all generator subsystems;

[0029] S3. After receiving the group number allocation command, each sub-system switches from the receiving mode to the group number configuration mode to perform group resistance value detection:

[0030] The first electric generating subsystem detects the resistance value as R and confirms that its position is R / R=1;

[0031] The second power generation subsystem detects a resistance of 2R and confirms that its position is 2R / R=2;

[0032] …

[0033] The i-th generating subsystem detects a resistance value of iR and confirms that its position is iR / R=i;

[0034] …

[0035] The Nth electric generating subsystem detects a resistance value of NR and confirms that its position is NR / R=N;

[0036] S4. After each power generation subsystem confirms its own position, it writes its own position into the memory of its own control unit, executes the CAN communication ID (CAN ID) allocation program, automatically allocates the CAN ID, and then sends the power generation subsystem status information message to the power station control system through the CAN bus, reporting its own group number;

[0037] It should be noted that the default ID of the status information message of the pre-set transmitting subsystem is 0x100. After confirming its own group number, the first transmitting subsystem sets the status message ID to 0x110;

[0038] The second sending subsystem sets the status message ID to 0x120;

[0039] …

[0040] The i-th sending subsystem sets the status message ID to 0x1i0;

[0041] …

[0042] The Nth sending subsystem sets the status message ID to 0x1N0;

[0043] S5. After the power generation subsystem completes the group number allocation and CAN ID allocation, the power station control system verifies whether the group number and ID number reported by the power generation subsystem are consistent. If there is a mismatch, the above S1 to S4 are repeated, and the power station control system resends the subsystem group number allocation command, and the power generation subsystem re-allocates the group number;

[0044] If the group number and ID number reported by the power generation subsystem match, the configuration of the power station control system and each power generation subsystem is completed, and the power station control system and each power generation subsystem enter the normal working mode;

[0045] It should be noted that after completing the group number configuration, the power plant control system and the power generation subsystem both record the configuration results. After the configuration is successful, the group number will not be configured again the next time the system is started.

[0046] Embodiment 2, a fuel cell power station multi-system parallel group matching control method proposed by the present invention, compared with embodiment 1, this embodiment also includes a group control method under the power generation subsystem failure mode, and its specific implementation method is as follows:

[0047] (1) If a power generation subsystem needs to be replaced due to a fault, after replacing the faulty power generation subsystem with a new power generation subsystem, the power station control system re-allocates the group number and ID according to the multi-system parallel group matching control method of the fuel cell power station described in Example 1. After the allocation is completed, the fuel cell power station can work normally;

[0048] (2) If a power generation subsystem fails and cannot be replaced, the failed power generation subsystem will be removed from the power station system, and the group number allocation harness will be connected across the failed power generation subsystem. The power station control system confirms the number of power generation subsystems and the power station power according to the detected resistance value, and the group number and ID are reallocated according to the multi-system parallel group matching control method of the fuel cell power station described in Example 1. After the allocation is completed, the fuel cell power station can operate normally.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A fuel cell power station multi-system parallel group matching control method, characterized in that: The specific implementation steps include the following: S1. When installing a fuel cell power station, several kilowatt-class fuel cell power generation subsystems are electrically connected in parallel, and a resistor with a resistance value of R for group number assignment is added to the power generation subsystem. Then, several power generation subsystems with added group number assignment resistors are connected in series through a control harness, and the power generation subsystem communicates with the power station control system through the CAN bus; S2. After the fuel cell power station is installed, when the power station control system and the power generation sub-system are powered on and start working, the power station control system first detects whether the power generation sub-system needs to be configured with a group number. If the power generation sub-system is not configured with a group number, the power generation sub-system enters a receive-only mode before the group number and ID are assigned, that is, it does not send CAN messages, but only receives control commands from the power station control system; S3, power station control system detection total resistance R total , determine that the power station has N = R total / R generating subsystems, and send the number of generating subsystems N to all generating subsystems through the CAN bus, and send a subsystem group number allocation command; S4, after receiving the group number allocation command, each sub-system performs group resistance value detection, and confirms its own position based on the resistance value detected by itself; S5. After each power generation subsystem confirms its own position, it writes its own position into the memory of its own control unit. After that, each power generation subsystem automatically allocates a CAN communication ID and sends a power generation subsystem status information message to the power station control system through the CAN bus, reporting its own group number; S6. After the power generation subsystem completes the group number allocation and CAN communication ID allocation, the power station control system verifies whether the group number and ID number reported by the power generation subsystem are consistent. If there is a mismatch, repeat the above S2 to S5. If the group number and ID number reported by the power generation subsystem match, the configuration of the power station control system and each power generation subsystem is completed, and the power station control system and each power generation subsystem enter the normal working mode.

2. A fuel cell power station multi-system parallel group matching control method according to claim 1, characterized in that: The method for the power generation sub-system to confirm its position based on the resistance value detected by itself is: the first power generation sub-system detects a resistance value of R, confirming its position as R / R=1, the second power generation sub-system detects a resistance value of 2R, confirming its position as 2R / R=2, ..., the Nth power generation sub-system detects a resistance value of NR, confirming its position as NR / R=N.

3. A fuel cell power station multi-system parallel group matching control method according to claim 1, characterized in that: The method for automatically allocating CAN communication IDs for each sub-transmitting system is as follows: the default ID of the sub-transmitting system status information message is 0x100. After confirming its own group number, the first sub-transmitting system sets the status message ID to 0x110, the second sub-transmitting system sets the status message ID to 0x120, ..., and the Nth sub-transmitting system sets the status message ID to 0x1N0.

4. A fuel cell power station multi-system parallel group matching control method according to claim 1, characterized in that: After the power station control system and each power generation subsystem are configured, the power station control system and the power generation subsystem will record the configuration results. After the configuration is successful, the configuration group number will not be repeated the next time the system is started.

5. A fuel cell power station multi-system parallel group matching control method according to any one of claims 1 to 4, characterized in that: If a power generation subsystem needs to be replaced due to a fault, after replacing the faulty power generation subsystem with a new one, the power station control system and the power generation subsystem will reassign the group number and ID. After the allocation is completed, the fuel cell power station can work normally.

6. A fuel cell power station multi-system parallel group matching control method according to any one of claims 1 to 4, characterized in that: If a power generation subsystem fails and cannot be replaced, the failed power generation subsystem will be removed from the power station system, and the group number allocation harness will be connected across the failed power generation subsystem. The power station control system confirms the number of power generation subsystems and the power station power based on the detected resistance value. After that, the power station control system and the power generation subsystem will reallocate the group number and ID. After the allocation is completed, the fuel cell power station can operate normally.

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