SOFC power generation system and multi-fuel supply module and control method and device thereof

Abstract

The invention discloses an SOFC power generation system and a multi-fuel supply module and a control method and device thereof, and the method comprises the steps: obtaining the type of fuel provided by the fuel supply module and the operation condition of each power generation module under the condition that a fuel gas source of the SOFC power generation system is changed; calculating flow demand data of fuel required by each power generation module based on a preset fuel component database, the fuel type provided by the fuel supply module and the operation condition of each power generation module; and sending the flow demand data of the fuel required by each power generation module to the corresponding power generation module, so that the power generation module performs flow control on the required fuel according to the flow demand data. According to the invention, different fuels can be provided for the SOFC power generation system, multi-fuel coupling utilization is realized, and the problem of stable operation of the system during switching of different fuels is solved.

Description

Technical Field

[0001] The present application relates to the field of battery power generation, and in particular to a SOFC power generation system and a multi-fuel supply module and a control method and device thereof. Background Art

[0002] SOFC (Solid Oxide Fuel Cell system) power generation system is a highly efficient power generation device with the characteristics of high power generation efficiency and diversified fuels. Its fuel can be natural gas, hydrogen, biogas, biomass gas and other compounds containing C (carbon) and H (hydrogen).

[0003] In the prior art, SOFC power generation systems mostly use a single natural gas as fuel, which not only has high power generation efficiency and relatively simple operation, but also produces only water and carbon dioxide, which is more environmentally friendly. However, using a single natural gas as fuel has certain disadvantages in environmental adaptability. It is not possible to select a more suitable fuel according to operating conditions and requirements, which may increase the economic cost of the power generation system. In some public patent documents, some multi-fuel battery power generation systems are also disclosed. However, when switching fuels, the changes in fuel components and the impact of fuel flow control on the stable operation of the fuel cell system are not considered, and the system needs to be shut down before switching fuels, which makes the system poor in practicality.

[0004] It should be noted that the above statements are only used to provide background technical information related to the present application and do not necessarily constitute prior art. Summary of the invention

[0005] In view of the above problems, the embodiments of the present application provide a SOFC power generation system and its multi-fuel supply module and control method and device, which can provide different fuel supplies for the SOFC power generation system, realize multi-fuel coupling utilization, and solve the problem of stable operation of the system when switching between different fuels.

[0006] In a first aspect, an embodiment of the present application provides a method for controlling a SOFC power generation system, the method comprising:

[0007] When the fuel gas source of the SOFC power generation system changes, obtaining the fuel type provided by the fuel supply module and the operating conditions of each power generation module;

[0008] Based on a preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module, the flow demand data of the fuel required by each power generation module is calculated; the fuel component database includes flow control data when various fuels are switched between different components; the flow demand data includes target flow data of the required fuel and flow adjustment data before reaching the target flow data;

[0009] The flow demand data of the fuel required by each power generation module is sent to the corresponding power generation module, so that the power generation module controls the flow of the required fuel according to the flow demand data.

[0010] In some optional embodiments, the calculation of the flow demand data of the fuel required by each power generation module based on a preset fuel composition database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module includes:

[0011] Determine the required fuel and current fuel composition of each power generation module based on the fuel type provided by the fuel supply module and the operating conditions of each power generation module;

[0012] Based on a preset fuel component database and the required fuel and current fuel component of each power generation module, flow demand data of the required fuel of each power generation module is calculated.

[0013] In some optional embodiments, the calculation of the flow demand data of the fuel required by each power generation module based on the preset fuel composition database and the required fuel and current fuel composition of each power generation module includes:

[0014] Based on the fuel composition database and the required fuel of each power generation module, determine the target flow data of the fuel required by each power generation module; the target flow data includes the flow value of a single fuel or the flow ratio of multiple fuels;

[0015] Based on the current fuel composition and the target flow data of the fuel required by each power generation module, flow adjustment data before the fuel required by each power generation module reaches the target flow data is determined.

[0016] In some optional embodiments, the fuel supply module of the SOFC power generation system includes an isolation valve and a flow controller arranged on each fuel gas path; the flow demand data of the fuel required by each power generation module is sent to the corresponding power generation module, including:

[0017] Controlling the isolation valve of the fuel gas circuit corresponding to the required fuel to open, and controlling the isolation valves of the remaining fuel gas circuits to close;

[0018] After the pressure in front of the flow controller of the fuel gas path corresponding to the required fuel is stabilized, the flow demand data of the fuel required by each power generation module is sent to the corresponding power generation module.

[0019] In a second aspect, an embodiment of the present application provides a master control device for a SOFC power generation system, comprising:

[0020] A data acquisition module, used for acquiring the fuel type provided by the fuel supply module and the operating conditions of each power generation module when the fuel gas source of the SOFC power generation system changes;

[0021] A flow calculation module, for calculating the flow demand data of the fuel required by each power generation module based on a preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module; the fuel component database includes flow control data when various fuels are switched between different components; the flow demand data includes target flow data of the required fuel and flow adjustment data before reaching the target flow data;

[0022] The data sending module is used to send the flow demand data of the fuel required by each power generation module to the corresponding power generation module, so that the power generation module controls the flow of the required fuel according to the flow demand data.

[0023] In a third aspect, an embodiment of the present application provides a SOFC power generation system, comprising a master control module, a fuel supply module, an on-grid and off-grid module, and a plurality of power generation modules; the fuel supply module is used to provide various fuels to each of the power generation modules; each of the power generation modules is used to perform an electrochemical reaction according to the fuel provided by the fuel supply module, and output electric energy; the on-grid and off-grid module controls the electric energy output by each of the power generation modules to be on-grid and off-grid;

[0024] The master control module is connected to the fuel supply module, the grid-connected and off-grid module and each of the power generation modules respectively, and executes the control method described in any one of claims 1-4.

[0025] In some optional embodiments, the fuel supply module includes a plurality of fuel gas circuits, each for providing a different fuel gas source;

[0026] Each of the fuel gas circuits includes a gas processing device and a flow controller. The gas processing device is used to process impurity components and filter particulate matter in the gas; the flow controller is used to control the flow of the processed gas.

[0027] In some optional embodiments, the fuel supply module further includes a plurality of isolation valves, wherein the plurality of isolation valves are arranged in one-to-one correspondence with the plurality of fuel gas circuits, and the isolation valves are arranged at the source end of the fuel gas circuit to control the on-off of the fuel gas circuit.

[0028] In some optional embodiments, the fuel supply module also includes a plurality of one-way valves, and the plurality of one-way valves are arranged in one-to-one correspondence with the plurality of fuel gas circuits, and the one-way valves are arranged at the end of the fuel gas circuit to control the one-way flow of the gas in the fuel gas circuit.

[0029] In a fourth aspect, an embodiment of the present application provides a fuel supply module for a SOFC power generation system, wherein the fuel supply module is the fuel supply module described in the second aspect.

[0030] In the present application, when the fuel gas source of the SOFC power generation system changes, the fuel type provided by the fuel supply module and the operating conditions of each power generation module can be obtained, and then based on the preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module, the flow demand data of the fuel required by each power generation module, that is, the target flow data of the fuel required by each power generation module and the flow adjustment data before reaching the target flow data, are calculated. After that, the flow demand of the fuel required by each power generation module is sent to the corresponding power generation module, and each power generation module can control the flow of the corresponding gas according to the received flow demand data, and can realize the mixing of different fuels and fuel switching, thereby realizing the coupled utilization of multiple fuels, so that the power generation module can realize adaptive control under multiple fuels and stable operation of the power generation system without shutting down.

[0031] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation method of the present application is listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0033] Figure 1 A flow chart of a SOFC power generation system control method provided in some embodiments of the present application;

[0034] Figure 2 A schematic diagram of the framework structure of a SOFC power generation system provided in some embodiments of the present application;

[0035] Figure 3 A schematic diagram of the framework structure of a fuel supply module in a SOFC power generation system provided in some embodiments of the present application;

[0036] Figure 4 This is a specific flow chart of step S2 in some embodiments of the present application;

[0037] Figure 5A schematic diagram of a specific flow chart of a SOFC power generation system control method provided in some embodiments of the present application;

[0038] Figure 6 A schematic diagram of the framework of a master control device for a SOFC power generation system provided in some embodiments of the present application;

[0039] Figure 7 A schematic structural diagram of an electronic device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0040] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the embodiments of the present application; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0042] In the description of the embodiments of the present application, “plurality” means more than two, unless otherwise clearly and specifically defined.

[0043] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0044] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0045] In the related art, a multi-fuel adaptive fuel cell integrated system and integration method are disclosed, and it is proposed to use the fuel automatic identification burner module to realize the identification of multiple fuels, and heat the reformer and the battery stack through the switching device, and then use the fuel to generate electricity in grid connection. However, the document does not clearly state how to realize the automatic identification of fuels, and does not consider the impact of changes in fuel components and fuel flow control on the stable operation of the fuel cell system, and the system has poor practicality.

[0046] Based on the above reasons, the embodiment of the present application proposes a control method for a SOFC power generation system, which can be applied to a SOFC power generation system, and can be specifically executed by using a master control module of a SOFC power generation system. In this method, when the fuel gas source of the SOFC power generation system changes, the fuel type provided by the fuel supply module and the operating conditions of each power generation module are obtained; then, based on the preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module, the flow demand data of the fuel required by each power generation module is calculated; then, the flow demand of the fuel required by each power generation module is sent to the corresponding power generation module, and the power generation module can control the flow of the required fuel according to the flow demand data. In this way, when the fuel gas source of the SOFC power generation system changes, the target flow data of the fuel required by each power generation module and the flow adjustment data before reaching the target flow data can be calculated based on the preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module. The calculated target flow data and flow adjustment data are sent to the corresponding power generation module. After that, each power generation module can control the flow of the corresponding fuel gas according to the received flow demand data, and can realize the blending of different fuels and fuel switching, thereby realizing the coupled utilization of multiple fuels, so that the power generation module can realize adaptive control under multiple fuels and stable operation of the power generation system without shutting down.

[0047] The following is a detailed description of the SOFC power generation system control method provided by the embodiment of the present application in conjunction with the accompanying drawings. Figure 1 , Figure 1 A flow chart of a control method for a SOFC power generation system provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the SOFC power generation system control method may include the following steps:

[0048] Step S1, when the fuel gas source of the SOFC power generation system changes, obtaining the fuel type provided by the fuel supply module and the operating conditions of each power generation module;

[0049] Step S2, based on a preset fuel composition database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module, calculate the flow demand data of the fuel required by each power generation module;

[0050] Step S3, sending the flow demand data of the fuel required by each power generation module to the corresponding power generation module, so that the power generation module controls the flow of the required fuel according to the received flow demand data.

[0051] Specifically, the structure of the above-mentioned SOFC power generation system can be as follows: Figure 2 As shown, it includes a master control module, a fuel supply module, multiple power generation modules, and an on-grid or off-grid module. Among them, the fuel supply module can integrate the supply of multiple different fuels to provide an appropriate amount of clean gas to multiple power generation modules at the same time. The master control module of the SOFC power generation system can calculate the blending ratio of multiple fuels according to the changes in the gas source components, and then adjust the operating state of each power generation module to make it work in the best efficiency zone or the highest power point, and realize the power grid connection or off-grid operation through the on-grid or off-grid module.

[0052] The specific structure of the fuel supply module can be as follows Figure 3 As shown, it includes multiple fuel gas lines, each of which includes isolation valves, gas processing, flow controllers, one-way valves and other components. Among them, the gas processing module provides gas impurity component (sulfide, tar, etc.) processing, particulate matter filtering and other functions to ensure the cleanliness of the gas entering the system. The function of the isolation valve is to control the on and off of each gas line, which is controlled by the system master control. The flow controller provides the gas flow required by the power generation module, which is controlled by the controller of the power generation module to ensure that the power generation module can achieve stable operation under single gas conditions and stable operation under multiple fuel gas mixing conditions. The function of the one-way valve is to prevent the reverse flow of different gases, among which the hydrogen line, biogas line, and biomass gas line are mixed with the natural gas line in the one-way valve.

[0053] The fuel types provided by the fuel supply module may include natural gas, hydrogen, biogas and biomass gas, etc. Different fuels use different gas circuits for gas supply, and isolation valves and flow controllers can be set respectively to facilitate independent control of a single gas source. The operating conditions of each power generation module include but are not limited to system load, operating conditions, output power and the fuel gas source components currently used (before the fuel gas source is changed), that is, the current fuel components, etc. The fuel component database includes flow control data when various fuels are switched between different components, including but not limited to the target flow value of the required fuel, and the transition time and flow control data from the mixed fuel to the required fuel during the transition period. The flow demand data includes the target flow data of the required fuel and the flow adjustment data before reaching the target flow data. The required fuel may include one or more, and the flow demand data of the required fuel may also include the flow value of a fuel or the flow ratio of multiple fuels, as well as the time before reaching the flow value or flow ratio and the flow control data of the fuel, etc.

[0054] It should be noted that the specific structure of the above-mentioned SOFC power generation system and its fuel supply module indicates an implementation mode of this embodiment, and this embodiment is not limited thereto, as long as the master control module of the SOFC power generation system can implement the above-mentioned SOFC power generation system control method.

[0055] In actual applications, when the fuel gas source changes, it is necessary to close the gas circuit of the current fuel gas source and open the gas circuit of the required fuel gas source. At this time, a power generation system may have both the gas source before the fuel gas source is changed and the gas source after the fuel gas source is changed. The performance, mixing performance, flow ratio and time for achieving stable mixing of the two gas sources can be found in the preset fuel component database. Then, after determining the fuel required for each power generation module, the flow demand data of the fuel required for each power generation module can be determined based on the preset fuel component database.

[0056] In some optional embodiments, such as Figure 4 As shown, the above-mentioned step S2 may include the following specific processing steps: step S21, determining the required fuel and current fuel composition of each power generation module based on the fuel type provided by the fuel supply module and the operating conditions of each power generation module; step S22, calculating the flow demand data of the fuel required by each power generation module based on the preset fuel component database and the required fuel and current fuel composition of each power generation module.

[0057] In this embodiment, the current fuel component of each power generation module can be determined based on the operating conditions of each power generation module or the fuel type preset in the master control system, and then the required fuel of each power generation module after the fuel gas source is changed can be determined based on the fuel type provided by the fuel supply module. Here, the required fuel of each power generation module can be one or more fuels (it can be switching one fuel to another or more fuels, or it can be mixed with one or more fuels based on the fuel before the gas source is changed), and this embodiment does not make specific restrictions on this. After the required fuel of each power generation module is determined, the flow demand data of the required fuel of each power generation module can be calculated based on the preset fuel component database, the current fuel component and the required fuel of each power generation module.

[0058] Specifically, the above-mentioned step S22, i.e., the step of calculating the flow demand data of the fuel required for each power generation module based on the preset fuel component database, the current fuel component and the required fuel of each power generation module, may include the following processing: based on the fuel component database and the required fuel of each power generation module, determining the target flow data of the fuel required for each power generation module; based on the current fuel component and the target flow data of the fuel required for each power generation module, determining the time for the fuel required for each power generation module to reach the stable flow data.

[0059] Among them, the target flow data includes the flow value of a single fuel or the flow ratio of multiple fuels. Here, the flow value of a single fuel includes the flow values ​​at different times before reaching the target flow, and the flow ratio of multiple fuels also includes the flow ratio at different times before reaching the target flow, that is, the flow value and the flow ratio can be dynamically changing values ​​before reaching the target value.

[0060] In this embodiment, after determining the required fuel, the target flow value or flow ratio value that each fuel gas source needs to reach when each power generation module uses the required fuel to generate electricity under the current working condition can be determined based on the performance of each fuel recorded in the fuel component database. In view of the fact that the current power generation module still contains part of the current fuel components before the fuel is changed, it is necessary to balance the components of the required fuel and the current fuel in each power generation module before the required fuel reaches the target flow value, and determine how to adjust the flow of the required fuel and the flow of the current fuel before the required fuel reaches the target flow value, so as to achieve the non-stop operation, so that the power generation module and the power generation system do not need to be shut down during the gas source change process, and can still operate stably.

[0061] In other optional embodiments, when the fuel supply module of the SOFC power generation system includes isolation valves and flow controllers arranged on each fuel gas circuit, the above-mentioned step of sending the flow demand data of the fuel required by each power generation module to the corresponding power generation module may include the following specific processing procedures: controlling the isolation valve of the fuel gas circuit corresponding to the required fuel to open, and controlling the isolation valves of the remaining fuel gas circuits to close; after the pressure in front of the flow controller of the fuel gas circuit corresponding to the required fuel is stabilized, sending the flow demand data of the fuel required by each power generation module to the corresponding power generation module.

[0062] It should be noted that this embodiment does not impose any specific restrictions on the specific structure and model of the isolation valve and the flow controller, as long as the isolation valve can control the on-off function of the gas circuit and the flow controller can control the flow of the fuel gas source.

[0063] In this embodiment, the master control module can control the on and off of each gas circuit through an isolation valve, and the power generation module can control the gas flow of the fuel required by the power generation module through a flow controller to ensure that the power generation module can achieve stable operation under single gas conditions and stable operation under multiple fuel gas mixed conditions. After the pressure in front of the flow controller of the corresponding fuel gas circuit of the required fuel is stabilized, the flow demand data of the fuel required by each power generation module is sent to the corresponding power generation module, which can ensure the stability of the supply of the required fuel and then ensure the stable operation of the power generation module.

[0064] In some specific embodiments, the specific process of the SOFC power generation system control method can be as follows: Figure 5As shown, it includes the following process: when the fuel gas source changes, the master control module obtains the fuel type provided by the fuel supply module, that is, the component of the fuel gas provided by the fuel supply module, which can be detected in real time online by an instrument and directly uploaded to the master control, or it can be detected manually and the gas component can be input into the master control module. When the master control module receives the fuel gas component, it calculates the flow distribution of different fuels required by the power generation module or the flow value of a single gas according to the fuel component database built into the master control module and the operating conditions of the current power generation module. Then, the master control module can control the opening or closing of the isolation valve of the corresponding gas circuit to provide a gas source. After the pressure before the flow controller is stable, the master control module sends the flow demand to the controller of the power generation module, and the controller of the power generation module sends the flow control demand to the flow controllers of each fuel gas circuit, and provides the gas flow that meets the operation of the power generation module by controlling the flow controllers of each fuel gas circuit, thereby realizing the mixing of different fuels or fuel switching. In this process, the power generation module does not need to be shut down, and can realize adaptive control under multiple fuels and stable operation of the system.

[0065] In summary, the SOFC power generation system control method provided in this embodiment can obtain the fuel type provided by the fuel supply module and the operating conditions of each power generation module when the fuel gas source of the SOFC power generation system changes, and then calculate the flow demand data of the fuel required by each power generation module based on the preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module, that is, the target flow data of the fuel required by each power generation module and the flow adjustment data before reaching the target flow data. After that, the flow demand of the fuel required by each power generation module is sent to the corresponding power generation module, and each power generation module can control the flow of the corresponding gas according to the received flow demand data, and can realize the mixing of different fuels and fuel switching, thereby realizing the coupled utilization of multiple fuels, so that the power generation module can realize adaptive control under multiple fuels and stable operation of the power generation system without shutting down.

[0066] Based on the same concept as the above-mentioned SOFC power generation system control method, the embodiment of the present application also provides a master control device for a SOFC power generation system, which is used to implement the above-mentioned SOFC power generation system control method, such as Figure 6 As shown, the device comprises:

[0067] A data acquisition module, used to acquire the fuel type provided by the fuel supply module and the operating conditions of each power generation module when the fuel gas source of the SOFC power generation system changes;

[0068] The flow calculation module is used to calculate the flow demand data of the fuel required by each power generation module based on the preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module; the fuel component database includes the flow control data when various fuels are switched between different components; the flow demand data includes the target flow data of the required fuel and the flow adjustment data before reaching the target flow data;

[0069] The data sending module is used to send the flow demand data of the fuel required by each power generation module to the corresponding power generation module, so that the power generation module can control the flow of the required fuel according to the flow demand data.

[0070] It can be understood that the master control device for the SOFC power generation system provided in this embodiment is used to execute the above-mentioned SOFC power generation system control method, so it can at least achieve the beneficial effects that can be achieved by the above-mentioned SOFC power generation system control method, and the various implementation methods of the above-mentioned SOFC power generation system control method are also applicable to the master control device for the SOFC power generation system, which will not be repeated here.

[0071] Based on the same concept as the above-mentioned SOFC power generation system control method, the embodiment of the present application also provides a SOFC power generation system, such as Figure 2 As shown, the SOFC power generation system includes a master control module, a fuel supply module, an on-grid and off-grid module and a plurality of power generation modules. The fuel supply module is used to provide various fuels to each power generation module. Each power generation module is used to perform an electrochemical reaction according to the fuel provided by the fuel supply module and output electrical energy. The on-grid and off-grid module controls the electrical energy output by each power generation module to be on-grid and off-grid. The master control module can be connected to the fuel supply module, the on-grid and off-grid module and each power generation module respectively, and execute the SOFC power generation system control method in any of the above embodiments.

[0072] It can be understood that the SOFC power generation system provided in this embodiment includes a master control module for executing the above-mentioned SOFC power generation system control method, so it can at least achieve the beneficial effects that can be achieved by the above-mentioned SOFC power generation system control method, and the various implementation methods of the above-mentioned SOFC power generation system control method are also applicable to the SOFC power generation system, which will not be repeated here.

[0073] In some optional embodiments, such as Figure 3 As shown, the fuel supply module may include multiple fuel gas circuits, each used to provide different fuel gas sources; each fuel gas circuit includes a gas processing device and a flow controller, the gas processing device is used to process the impurity components and filter the particulate matter of the gas; the flow controller is used to control the flow of the processed gas.

[0074] In this embodiment, the gas processing module provides functions such as gas impurity component (sulfide, tar, etc.) processing and particulate matter filtering to ensure the cleanliness of the gas entering the system. The flow controller provides the gas flow required by the power generation module, which is controlled by the controller of the power generation module to ensure that the power generation module can achieve stable operation under single gas conditions and stable operation under mixed conditions of multiple fuel gases.

[0075] Specifically, the fuel supply module also includes a plurality of isolation valves, which are arranged one by one with the plurality of fuel gas lines, and the isolation valves are arranged at the source end of the fuel gas line to control the on-off of the fuel gas line. In this way, the master control module can control the on-off of each gas line through the isolation valve, and control the flow of the fuel gas through the isolation valve and the flow controller, thereby realizing double insurance and improving the reliability and safety of the power generation system.

[0076] Optionally, the fuel supply module in this embodiment may further include multiple one-way valves, which are arranged one-to-one corresponding to the multiple fuel gas circuits, and the one-way valves are arranged at the end of the fuel gas circuit to control the one-way flow of the gas in the fuel gas circuit.

[0077] In this embodiment, the function of the one-way valve is to prevent the reverse flow of different gases, thereby further improving the reliability and safety of the power generation system. The hydrogen path, the biogas path, and the biomass gas path are all mixed with the natural gas path at the one-way valve.

[0078] Based on the same concept as the above-mentioned SOFC power generation system, the embodiment of the present application further provides a fuel supply module for the SOFC power generation system, and the fuel supply module can be the fuel supply module provided by any implementation manner in the above-mentioned SOFC power generation system embodiment.

[0079] The fuel supply module can provide a variety of fuels for the SOFC power generation system. When the fuel gas source of the SOFC power generation system changes, the master control module of the SOFC power generation system can calculate the target flow data of the fuel required by each power generation module and the flow regulation data before reaching the target flow data based on the fuel type provided by the fuel supply module, the preset fuel component database, and the operating conditions of each power generation module, and send the calculated target flow data and flow regulation data to the corresponding power generation module. After that, each power generation module can control the flow of the corresponding fuel gas according to the received flow demand data, and can realize the blending of different fuels and fuel switching, thereby realizing the coupled utilization of multiple fuels, so that the power generation module can realize adaptive control under multiple fuels and stable operation of the power generation system without shutting down.

[0080] The present application also provides an electronic device to execute the above-mentioned SOFC power generation system control method. Figure 7, which shows a schematic diagram of an electronic device provided by some embodiments of the present application. Figure 7 As shown, the electronic device 7 includes: a processor 701, a memory 702, a storage 703 and a communication interface 704, and the processor 701, the communication interface 704 and the storage 702 are connected through the storage 703; the storage 702 stores a computer program that can be run on the processor 701, and when the processor 701 runs the computer program, it executes the SOFC power generation system control method provided in any of the aforementioned embodiments of the present application.

[0081] The memory 702 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the device network element and at least one other network element is realized through at least one communication interface 704 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0082] The memory 703 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory 702 is used to store programs, and the processor 701 executes the programs after receiving the execution instructions. The control method of the SOFC power generation system disclosed in any of the embodiments of the present application may be applied to the processor 701, or implemented by the processor 701.

[0083] The processor 701 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 701. The above processor 701 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a readily available programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in the embodiments of the present application can be directly embodied as a hardware decoding processor to be executed, or the hardware and software modules in the decoding processor can be executed. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 702, and the processor 701 reads the information in the memory 702 and completes the steps of the above method in combination with its hardware.

[0084] The electronic device provided in the embodiment of the present application and the SOFC power generation system control method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the methods adopted, operated or implemented therein.

[0085] An embodiment of the present application also provides a computer-readable storage medium corresponding to the SOFC power generation system control method provided in the aforementioned embodiment, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it will execute the SOFC power generation system control method provided in any of the aforementioned embodiments.

[0086] It should be noted that computer-readable storage media may include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory, optical disks or other optical or magnetic storage media, etc., which are not listed here one by one.

[0087] The computer-readable storage medium provided in the embodiment of the present application and the SOFC power generation system control method provided in the embodiment of the present application are based on the same inventive concept and have the same beneficial effects as the method adopted, run or implemented by the application program stored therein.

[0088] The embodiment of the present application also provides a computer program product corresponding to the SOFC power generation system control method provided in the above embodiment, including a computer program, which is executed by a processor to implement the above SOFC power generation system control method.

[0089] The computer program product provided in the embodiment of the present application is based on the same inventive concept as the SOFC power generation system control method provided in the embodiment of the present application, and has the same beneficial effects as the method implemented by executing the computer program thereof by a processor.

[0090] It can be understood that the above description of the various embodiments tends to emphasize the differences between the various embodiments, and the same or similar points can be referenced to each other. For the sake of brevity, they will not be repeated herein.

[0091] It is understood by those skilled in the art that in the above method of the specific embodiment, the order of writing each step does not mean a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A method for controlling a SOFC power generation system, characterized in that: The method comprises: When the fuel gas source of the SOFC power generation system changes, obtaining the fuel type provided by the fuel supply module and the operating conditions of each power generation module; Based on a preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module, the flow demand data of the fuel required by each power generation module is calculated; the fuel component database includes flow control data when various fuels are switched between different components; the flow demand data includes target flow data of the required fuel and flow adjustment data before reaching the target flow data; The flow demand data of the fuel required by each power generation module is sent to the corresponding power generation module, so that the power generation module controls the flow of the required fuel according to the flow demand data.

2. The method according to claim 1, characterized in that The calculation of the flow demand data of the fuel required by each power generation module based on the preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module includes: Determine the required fuel and current fuel composition of each power generation module based on the fuel type provided by the fuel supply module and the operating conditions of each power generation module; Based on a preset fuel component database and the required fuel and current fuel component of each power generation module, the flow demand data of the required fuel of each power generation module is calculated.

3. The method according to claim 2, characterized in that The calculation of the flow demand data of the fuel required by each power generation module based on the preset fuel component database and the required fuel and current fuel component of each power generation module includes: Based on the fuel composition database and the required fuel of each power generation module, determine the target flow data of the fuel required by each power generation module; the target flow data includes the flow value of a single fuel or the flow ratio of multiple fuels; Based on the current fuel composition and the target flow data of the fuel required by each power generation module, flow adjustment data before the fuel required by each power generation module reaches the target flow data is determined.

4. The method according to claim 1, characterized in that The fuel supply module of the SOFC power generation system includes an isolation valve and a flow controller arranged on each fuel gas path; the flow demand data of the fuel required by each power generation module is sent to the corresponding power generation module, including: Controlling the isolation valve of the fuel gas circuit corresponding to the required fuel to open, and controlling the isolation valves of the remaining fuel gas circuits to close; After the pressure in front of the flow controller of the fuel gas path corresponding to the required fuel is stabilized, the flow demand data of the fuel required by each power generation module is sent to the corresponding power generation module.

5. A master control device for a SOFC power generation system, characterized in that: include: A data acquisition module, used for acquiring the fuel type provided by the fuel supply module and the operating conditions of each power generation module when the fuel gas source of the SOFC power generation system changes; A flow calculation module, for calculating the flow demand data of the fuel required by each power generation module based on a preset fuel component database, the fuel type provided by the fuel supply module, and the operating conditions of each power generation module; the fuel component database includes flow control data when various fuels are switched between different components; the flow demand data includes target flow data of the required fuel and flow adjustment data before reaching the target flow data; The data sending module is used to send the flow demand data of the fuel required by each power generation module to the corresponding power generation module, so that the power generation module controls the flow of the required fuel according to the flow demand data.

6. A SOFC power generation system, characterized in that: It includes a master control module, a fuel supply module, an on-grid and off-grid module and a plurality of power generation modules; the fuel supply module is used to provide various fuels to each of the power generation modules; each of the power generation modules is used to perform an electrochemical reaction according to the fuel provided by the fuel supply module and output electric energy; the on-grid and off-grid module controls the electric energy output by each of the power generation modules to be on-grid and off-grid; The master control module is connected to the fuel supply module, the grid-connected and off-grid module and each of the power generation modules respectively, and executes the control method described in any one of claims 1-4.

7. The SOFC power generation system according to claim 6, characterized in that: The fuel supply module includes a plurality of fuel gas circuits, each of which is used to provide different fuel gas sources; Each of the fuel gas circuits includes a gas processing device and a flow controller. The gas processing device is used to process impurity components and filter particulate matter in the gas; the flow controller is used to control the flow of the processed gas.

8. The SOFC power generation system according to claim 7, characterized in that: The fuel supply module also includes a plurality of isolation valves, which are arranged in one-to-one correspondence with the plurality of fuel gas circuits, and the isolation valves are arranged at the source end of the fuel gas circuit to control the on-off of the fuel gas circuit.

9. The SOFC power generation system according to claim 7, characterized in that: The fuel supply module also includes a plurality of one-way valves, which are arranged in one-to-one correspondence with the plurality of fuel gas circuits, and the one-way valves are arranged at the ends of the fuel gas circuits to control the one-way flow of the fuel gas in the fuel gas circuits.

10. A fuel supply module for a SOFC power generation system, characterized in that: The fuel supply module is the fuel supply module according to any one of claims 6 to 9.

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