CN116845302A - Control method and device for SOFC output voltage, terminal equipment and medium - Google Patents

Control method and device for SOFC output voltage, terminal equipment and medium Download PDF

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Publication number
CN116845302A
CN116845302A CN202310741514.1A CN202310741514A CN116845302A CN 116845302 A CN116845302 A CN 116845302A CN 202310741514 A CN202310741514 A CN 202310741514A CN 116845302 A CN116845302 A CN 116845302A
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China
Prior art keywords
sofc
voltage
output voltage
time period
historical
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CN202310741514.1A
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Inventor
陈正鹏
许仁辞
董江波
丁建华
李明飞
熊凯
饶睦敏
陈创庭
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Guangdong Energy Group Science And Technology Research Institute Co ltd
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Guangdong Energy Group Science And Technology Research Institute Co ltd
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Priority to CN202310741514.1A priority Critical patent/CN116845302A/en
Publication of CN116845302A publication Critical patent/CN116845302A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
    • H01M8/04858—Electric variables
    • H01M8/04865—Voltage
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04305—Modeling, demonstration models of fuel cells, e.g. for training purposes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
    • H01M8/04298—Processes for controlling fuel cells or fuel cell systems
    • H01M8/04992—Processes for controlling fuel cells or fuel cell systems characterised by the implementation of mathematical or computational algorithms, e.g. feedback control loops, fuzzy logic, neural networks or artificial intelligence
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
    • H01M2250/10—Fuel cells in stationary systems, e.g. emergency power source in plant

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  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Fuel Cell (AREA)
  • Automation & Control Theory (AREA)
  • Artificial Intelligence (AREA)
  • Computing Systems (AREA)
  • Evolutionary Computation (AREA)
  • Fuzzy Systems (AREA)
  • Medical Informatics (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Health & Medical Sciences (AREA)

Abstract

The invention discloses a control method, a device, terminal equipment and a medium of SOFC output voltage, wherein the method comprises the following steps: acquiring cell data of the SOFC in the current time period; wherein the battery data includes: inputting fuel quantity, water vapor quantity, cell temperature and output voltage of the SOFC; inputting the cell data of the SOFC in the current time period into a voltage prediction model, so that the voltage prediction model fits according to the fuel quantity and the water vapor quantity of the SOFC in the current time period and the cell temperature and the output voltage of the SOFC, and the variation trend of the SOFC cell data is obtained; determining a predicted value of the output voltage of the SOFC in the next time period according to the change trend; when the predicted value exceeds the preset voltage range, a driving signal is generated according to the predicted value, and the output voltage of the SOFC is adjusted according to the driving signal, so that the output voltage of the SOFC in the next time period does not exceed the preset voltage range.

Description

Control method and device for SOFC output voltage, terminal equipment and medium
Technical Field
The invention relates to the technical field of electric energy quality analysis, in particular to a control method, a device, terminal equipment and a medium for SOFC output voltage.
Background
In the operation process of an SOFC (solid oxide fuel cell) system, chemical energy is converted into electric energy, and finally the converted electric energy is sent into a power grid connected with the SOFC system through an inverter after being converted. However, because the power supplied to the power grid may have factors that interfere with the quality of the power, such as higher harmonic components, the power supplied to the power grid may fluctuate; the existing method for coping with the fluctuation of the power grid adopts a traditional short-time Fourier transform analysis method, and after detecting a voltage dip signal, the voltage dip signal is transmitted to an inverter so that the inverter can operate by combining the voltage of the current SOFC, and the operation mode needs a great amount of operation time, and cannot respond to the change of the power grid in time and adjust the output voltage of the SOFC.
Disclosure of Invention
The embodiment of the invention provides a control method, a device, terminal equipment and a medium for SOFC output voltage, which can adjust the SOFC output voltage in advance, so that the SOFC output voltage can be quickly and timely adjusted, and sudden changes of a power grid caused by SOFC output voltage fluctuation are avoided.
An embodiment of the present invention provides a method for controlling an output voltage of an SOFC, including:
acquiring cell data of the SOFC in the current time period; wherein the battery data includes: inputting fuel quantity, water vapor quantity, cell temperature and output voltage of the SOFC;
inputting the cell data of the SOFC in the current time period into a voltage prediction model, so that the voltage prediction model fits according to the fuel quantity, the water vapor quantity and the cell temperature and the output voltage of the SOFC in the current time period to obtain the variation trend of the SOFC cell data; determining a predicted value of the output voltage of the SOFC in the next time period according to the change trend;
and when the predicted value exceeds a preset voltage range, generating a driving signal according to the predicted value, and adjusting the output voltage of the SOFC according to the driving signal so that the output voltage of the SOFC in the next time period does not exceed the preset voltage range.
Further, the adjusting the output voltage of the SOFC according to the driving signal so that the output voltage of the SOFC in the next time period does not exceed the preset voltage range includes:
and sending the driving signal to an SOFC system to which the SOFC belongs, so that the SOFC system adjusts any one or more of fuel quantity, water vapor quantity and cell temperature of the SOFC, and the output voltage of the SOFC in the next time period does not exceed a preset voltage range.
Further, when the predicted value does not exceed the preset voltage range, no driving signal is generated to adjust the output voltage of the SOFC.
Further, the construction of the voltage prediction model includes:
acquiring historical power generation data and historical battery data of the SOFC; wherein the historical power generation data comprises: historical three-phase voltage unbalance and historical voltage harmonic content; the historical battery data includes: inputting the historical fuel quantity, the historical steam quantity, the historical cell temperature and the historical output voltage of the SOFC;
constructing an initial SOFC simulation model;
and inputting the historical power generation data and the historical battery data into an initial SOFC simulation model to perform simulation operation, and generating the voltage prediction model.
Further, after generating the voltage prediction model, the method further includes:
and sending a voltage disturbance signal to the voltage prediction model so that the voltage prediction model carries out simulation operation according to the voltage disturbance signal, and outputting the voltage, the voltage harmonic content and the current harmonic content of the SOFC under the action of the voltage disturbance signal.
On the basis of the method item embodiments, the invention correspondingly provides device item embodiments;
an embodiment of the present invention correspondingly provides a control device for an output voltage of an SOFC, including: the device comprises a battery data acquisition module, a voltage prediction module and a voltage adjustment module;
the cell data acquisition module is used for acquiring cell data of the SOFC in the current time period; wherein the battery data includes: inputting fuel quantity, water vapor quantity, cell temperature and output voltage of the SOFC;
the voltage prediction module is used for inputting the cell data of the SOFC in the current time period into a voltage prediction model, so that the voltage prediction model fits according to the fuel quantity and the water vapor quantity of the SOFC in the current time period and the cell temperature and the output voltage of the SOFC, and the variation trend of the SOFC cell data is obtained; determining a predicted value of the output voltage of the SOFC in the next time period according to the change trend;
the voltage adjustment module is used for generating a driving signal according to the predicted value when the predicted value exceeds a preset voltage range, and adjusting the output voltage of the SOFC according to the driving signal so that the output voltage of the SOFC in the next time period does not exceed the preset voltage range.
Another embodiment of the present invention provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor executes the computer program to implement a method for controlling an output voltage of an SOFC according to the above embodiment of the present invention.
Another embodiment of the present invention provides a storage medium, where the storage medium includes a stored computer program, where when the computer program runs, the device where the storage medium is controlled to execute a method for controlling an output voltage of an SOFC according to the foregoing embodiment of the present invention.
The invention has the following beneficial effects:
the invention provides a control method, a device, terminal equipment and a medium for SOFC output voltage, wherein the method is characterized in that cell data of SOFC in the current time period are obtained, and a voltage prediction model is combined to fit according to the fuel quantity, the water vapor quantity and the cell temperature of SOFC in the cell data in the current time period and the output voltage, so that the variation trend of SOFC cell data is obtained, finally, the predicted value of the SOFC output voltage in the next time period is determined according to the variation trend, and when the predicted value exceeds the preset voltage range, the SOFC output voltage is adjusted in advance, so that the SOFC output voltage can be adjusted rapidly and timely, and sudden changes of a power grid caused by SOFC output voltage fluctuation are avoided.
Drawings
Fig. 1 is a flow chart of a control method of SOFC output voltage according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a control device for SOFC output voltage according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a method for controlling an output voltage of an SOFC according to an embodiment of the present invention includes:
step S1: acquiring cell data of the SOFC in the current time period; wherein the battery data includes: inputting fuel quantity, water vapor quantity, cell temperature and output voltage of the SOFC;
step S2: inputting the cell data of the SOFC in the current time period into a voltage prediction model, so that the voltage prediction model fits according to the fuel quantity, the water vapor quantity and the cell temperature and the output voltage of the SOFC in the current time period to obtain the variation trend of the SOFC cell data; determining a predicted value of the output voltage of the SOFC in the next time period according to the change trend;
step S3: and when the predicted value exceeds a preset voltage range, generating a driving signal according to the predicted value, and adjusting the output voltage of the SOFC according to the driving signal so that the output voltage of the SOFC in the next time period does not exceed the preset voltage range.
For step S1, in order to obtain the cell data and the power generation data of the SOFC conveniently, the cell data and the power generation data of the SOFC are collected in real time, after the cell data or the power generation data of the SOFC are collected, a database is formed according to the collected data, and then the corresponding SOFC cell data and the power generation data can be obtained according to the formed database.
For step S2, the problem of sudden rise, sudden fall, severe fluctuation or excessive ripple of the SOFC output voltage may be caused by the influence of the variation of the fuel amount, the water vapor amount and the cell temperature input to the SOFC in the power generation process of the SOFC; if the electric energy generated by the SOFC is directly input into the power grid, the whole power generation system is affected; therefore, before each voltage change, the state of the SOFC cell needs to be monitored according to the amount of fuel, the amount of water vapor, the cell temperature, and the like input to the SOFC.
After obtaining the cell data of the SOFC in the current time period, inputting the cell data in the current time period into a voltage prediction model, fitting the voltage prediction model according to the fuel quantity and the water vapor quantity of the SOFC in the current time period and the cell temperature and the output voltage of the SOFC, obtaining fitting curves of the fuel quantity and the water vapor quantity of the SOFC and the cell temperature and the output voltage of the SOFC, and obtaining the corresponding variation trend of the SOFC cell data through the fitting curves, thereby determining the predicted value of the output voltage of the SOFC in the next time period after the current time period according to the variation trend.
In a preferred embodiment, the construction of the voltage prediction model includes: acquiring historical power generation data and historical battery data of the SOFC; wherein the historical power generation data comprises: historical three-phase voltage unbalance and historical voltage harmonic content; the historical battery data includes: inputting the historical fuel quantity, the historical steam quantity, the historical cell temperature and the historical output voltage of the SOFC; constructing an initial SOFC simulation model; and inputting the historical power generation data and the historical battery data into an initial SOFC simulation model to perform simulation operation, and generating the voltage prediction model.
Specifically, according to the database constructed in the step S1, historical power generation data and historical battery data of the SOFC are obtained, and the obtained historical data are summarized; establishing an initial SOFC (solid oxide Fuel cell) system simulation model by adopting a DSP (digital signal processor) software platform, and inputting the acquired historical data into the initial SOFC system simulation model; the DSP software platform performs digital control on the input data, performs simulation operation according to the input data, and generates the voltage prediction model in the operation process.
It should be noted that, since the acquisition of the SOFC power generation data and the cell data is real-time acquisition, the acquired data is stored in the database after each real-time acquisition, when the simulation model is built and operated according to the data in the database, the corresponding data is acquired from the database in real time along with the increase of the operation time and added into the simulation model to perform continuous simulation operation, that is, the simulation model is continuously updated while the SOFC is operated, and when the voltage prediction model is predicted, the simulation model obtained by operation at the time closest to the current time period is adopted as the voltage prediction model.
In another preferred embodiment, after generating the voltage prediction model, further comprising: and sending a voltage disturbance signal to the voltage prediction model so that the voltage prediction model carries out simulation operation according to the voltage disturbance signal, and outputting the voltage, the voltage harmonic content and the current harmonic content of the SOFC under the action of the voltage disturbance signal.
Specifically, after the simulation model is generated, a disturbance time, such as between 0.01 and 0.1 seconds, can be set for the current simulation model on the DSP software platform; transmitting a voltage disturbance signal of 10mV to the simulation model in the set disturbance time, wherein when the simulation model receives the voltage disturbance signal, the current of the simulation model in the disturbance time also can generate synchronous change; through a DSP software platform, the output voltage, the voltage harmonic content, the current harmonic content and the like of the SOFC which are changed after the simulation model receives the voltage interference signal can be checked; corresponding voltage deviation data can be obtained by comparing the changed data with the data before the change; and then the influence of the electric energy output by the SOFC on the power grid quality can be quantitatively analyzed from the angles of voltage deviation, voltage harmonic content, load current harmonic content and the like, so that a user can analyze the electric energy quality output by the SOFC according to feedback data of a simulation model, and the electric energy quality is optimized and improved based on an analysis result.
Preferably, a SOFC simulation model can be built by using simulink software.
And step S3, monitoring a predicted value of the output voltage of the SOFC in the next time period output by the voltage prediction model, and when the predicted value exceeds a preset voltage range, indicating that the power grid fluctuation is caused when the output voltage of the SOFC corresponding to the predicted value is directly input into the power grid without adjustment, so that a driving signal is required to be generated according to the current predicted value, and the output voltage of the SOFC is adjusted according to the driving signal so as to avoid the power grid fluctuation caused by directly inputting the voltage with larger fluctuation into the power grid.
In a preferred embodiment, the adjusting the output voltage of the SOFC according to the driving signal so that the output voltage of the SOFC in the next period does not exceed the preset voltage range includes: and sending the driving signal to an SOFC system to which the SOFC belongs, so that the SOFC system adjusts any one or more of fuel quantity, water vapor quantity and cell temperature of the SOFC, and the output voltage of the SOFC in the next time period does not exceed a preset voltage range.
In another preferred embodiment, when the predicted value does not exceed the preset voltage range, no driving signal is generated to adjust the output voltage of the SOFC.
It should be noted that the above-described apparatus embodiments are merely illustrative, and the units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, in the drawings of the embodiment of the device provided by the invention, the connection relation between the modules represents that the modules have communication connection, and can be specifically implemented as one or more communication buses or signal lines. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
It will be clear to those skilled in the art that, for convenience and brevity, the specific working process of the apparatus described above may refer to the corresponding process in the foregoing method embodiment, which is not described herein again.
On the basis of the method item embodiment, the invention correspondingly provides a terminal equipment item embodiment.
An embodiment of the present invention provides a terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, where the processor executes the computer program to implement a method for controlling an output voltage of an SOFC according to any one of the present invention.
The terminal device may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc. The terminal device may include, but is not limited to, a processor, a memory.
The processor may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, which is a control center of the terminal device, and which connects various parts of the entire terminal device using various interfaces and lines.
The memory may be used to store the computer program, and the processor may implement various functions of the terminal device by running or executing the computer program stored in the memory and invoking data stored in the memory. The memory may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data created according to the use of the cellular phone, etc. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid-state storage device.
Based on the method item embodiments, the invention correspondingly provides storage medium item embodiments.
An embodiment of the present invention provides a storage medium, where the storage medium includes a stored computer program, where when the computer program runs, the device where the storage medium is controlled to execute a method for controlling an output voltage of an SOFC according to any one of the present invention.
The storage medium is a computer readable storage medium, and the computer program is stored in the computer readable storage medium, and when executed by a processor, the computer program can implement the steps of the above-mentioned method embodiments. Wherein the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), an electrical carrier signal, a telecommunications signal, a software distribution medium, and so forth.
While the foregoing is directed to the preferred embodiments of the present invention, it will be appreciated by those skilled in the art that changes and modifications may be made without departing from the principles of the invention, such changes and modifications are also intended to be within the scope of the invention.

Claims (8)

1. A method for controlling an output voltage of an SOFC, comprising:
acquiring cell data of the SOFC in the current time period; wherein the battery data includes: inputting fuel quantity, water vapor quantity, cell temperature and output voltage of the SOFC;
inputting the cell data of the SOFC in the current time period into a voltage prediction model, so that the voltage prediction model fits according to the fuel quantity, the water vapor quantity and the cell temperature and the output voltage of the SOFC in the current time period to obtain the variation trend of the SOFC cell data; determining a predicted value of the output voltage of the SOFC in the next time period according to the change trend;
and when the predicted value exceeds a preset voltage range, generating a driving signal according to the predicted value, and adjusting the output voltage of the SOFC according to the driving signal so that the output voltage of the SOFC in the next time period does not exceed the preset voltage range.
2. The method for controlling an output voltage of an SOFC according to claim 1, wherein adjusting the output voltage of the SOFC according to the driving signal so that the output voltage of the SOFC in a next period does not exceed a preset voltage range comprises:
and sending the driving signal to an SOFC system to which the SOFC belongs, so that the SOFC system adjusts any one or more of fuel quantity, water vapor quantity and cell temperature of the SOFC, and the output voltage of the SOFC in the next time period does not exceed a preset voltage range.
3. The method of claim 1, wherein the output voltage of the SOFC is adjusted without generating a driving signal when the predicted value does not exceed a preset voltage range.
4. The method for controlling the output voltage of an SOFC of claim 1, wherein the constructing the voltage prediction model includes:
acquiring historical power generation data and historical battery data of the SOFC; wherein the historical power generation data comprises: historical three-phase voltage unbalance and historical voltage harmonic content; the historical battery data includes: inputting the historical fuel quantity, the historical steam quantity, the historical cell temperature and the historical output voltage of the SOFC;
constructing an initial SOFC simulation model;
and inputting the historical power generation data and the historical battery data into an initial SOFC simulation model to perform simulation operation, and generating the voltage prediction model.
5. The method of claim 4, further comprising, after generating the voltage prediction model:
and sending a voltage disturbance signal to the voltage prediction model so that the voltage prediction model carries out simulation operation according to the voltage disturbance signal, and outputting the voltage, the voltage harmonic content and the current harmonic content of the SOFC under the action of the voltage disturbance signal.
6. A control device for SOFC output voltage, comprising: the device comprises a battery data acquisition module, a voltage prediction module and a voltage adjustment module;
the cell data acquisition module is used for acquiring cell data of the SOFC in the current time period; wherein the battery data includes: inputting fuel quantity, water vapor quantity, cell temperature and output voltage of the SOFC;
the voltage prediction module is used for inputting the cell data of the SOFC in the current time period into a voltage prediction model, so that the voltage prediction model fits according to the fuel quantity and the water vapor quantity of the SOFC in the current time period and the cell temperature and the output voltage of the SOFC, and the variation trend of the SOFC cell data is obtained; determining a predicted value of the output voltage of the SOFC in the next time period according to the change trend;
the voltage adjustment module is used for generating a driving signal according to the predicted value when the predicted value exceeds a preset voltage range, and adjusting the output voltage of the SOFC according to the driving signal so that the output voltage of the SOFC in the next time period does not exceed the preset voltage range.
7. A terminal device comprising a processor, a memory and a computer program stored in the memory and configured to be executed by the processor, the processor implementing a method of controlling the SOFC output voltage according to any one of claims 1 to 5 when executing the computer program.
8. A medium comprising a stored computer program, wherein the computer program when run controls a device in which the medium is located to perform a method of controlling the output voltage of an SOFC according to any one of claims 1 to 5.
CN202310741514.1A 2023-06-21 2023-06-21 Control method and device for SOFC output voltage, terminal equipment and medium Pending CN116845302A (en)

Priority Applications (1)

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CN202310741514.1A CN116845302A (en) 2023-06-21 2023-06-21 Control method and device for SOFC output voltage, terminal equipment and medium

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CN202310741514.1A CN116845302A (en) 2023-06-21 2023-06-21 Control method and device for SOFC output voltage, terminal equipment and medium

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CN116845302A true CN116845302A (en) 2023-10-03

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