CN116387572A - Online calibration method and device for fuel cell power generation system and corresponding equipment - Google Patents
Online calibration method and device for fuel cell power generation system and corresponding equipment Download PDFInfo
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- 239000000446 fuel Substances 0.000 title claims abstract description 125
- 238000010248 power generation Methods 0.000 title claims abstract description 86
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- 229910052739 hydrogen Inorganic materials 0.000 claims description 30
- 239000001257 hydrogen Substances 0.000 claims description 30
- 230000008569 process Effects 0.000 claims description 21
- 238000004590 computer program Methods 0.000 claims description 19
- 150000002431 hydrogen Chemical class 0.000 claims description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 12
- 239000000178 monomer Substances 0.000 claims description 12
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- 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
- H01M8/04701—Temperature
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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
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04358—Temperature; Ambient temperature of the coolant
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- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
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- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
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- H01M8/00—Fuel cells; Manufacture thereof
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- 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
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Abstract
The application discloses an online calibration method and device for a fuel cell power generation system and corresponding equipment, wherein the method comprises the following steps: setting a temperature interval and a current interval to obtain m water temperature discrete values and n current discrete values in the working range of the fuel cell; when the fuel cell power generation system is in an idle state, the electronic load is in a current control mode; when the fuel cell power generation system enters a stable state, the temperature control equipment is started and reaches a preset water temperature value; sending an initial value of a calibration parameter to a fuel cell power generation system; obtaining observation index values of a fuel cell power generation system running at different water temperature discrete values and different current discrete values; comparing the observation index value of each water temperature discrete value and each current discrete value with a preset threshold range respectively, and if the observation index value is not in the threshold range, sending an adjustment value of a calibration parameter to the fuel cell power generation system; the method has the beneficial effects of effectively improving the accuracy of on-line calibration, and is suitable for the technical field of battery calibration.
Description
Technical Field
The application relates to the technical field of battery calibration, in particular to an online calibration method and device for a fuel cell power generation system and corresponding equipment.
Background
When the fuel cell works, the fuel loses electrons at the anode to generate oxidation reaction, and the electrons flow to the cathode through an external circuit and generate reduction reaction with an oxidant, so that the chemical energy of the fuel is converted into electric energy; the reaction process generates heat, and the heat needs to be transferred in time to ensure that the system works in a proper temperature range.
The fuel cell as a power source of the mobile device needs to meet the power output requirement when the vehicle changes working conditions, and in order to ensure that the fuel cell power generation system can efficiently and stably work, the fuel supply subsystem, the oxidant supply subsystem and the thermal management subsystem of the fuel cell power generation system need to be precisely controlled within the full working condition range, and all control parameters are solidified in a controller of the fuel cell power generation system so that the fuel cell power generation system can automatically operate. In order to achieve the aim, all working condition calibration, including off-line calibration and on-line calibration, needs to be carried out on working parameters of each subsystem in the product development stage.
Off-line calibration: the main aim is to determine the basic MAP (Mean Average Precision) value of each subsystem, each subsystem operates independently and is not coupled in the calibration process, the fuel cell does not generate power externally, and the calibration result provides a reference standard for on-line calibration.
On-line calibration: when the standard is carried out, the galvanic pile and each subsystem are in an operation state, the coupling influence exists among the subsystems, the parameters to be regulated and the indexes to be met are more, each regulating parameter can possibly influence a plurality of indexes to different degrees, the influence degree difference of different indexes on the galvanic pile is larger, the safety of the system is influenced if the system is influenced to some extent, the parameters to be regulated must be preferentially met, the efficiency of the system is influenced to some extent, and the system can be optimized step by step.
Fig. 1 is a schematic diagram of a fuel cell calibration method in the prior art, which mainly adopts an integrated fuel cell power generation system to combine with a pile parameter to directly perform system-based calibration, meets the requirements of the pile on air, hydrogen and working temperature ranges by adjusting working parameters of each subsystem, and mainly adopts a PID adjustment mode, wherein the calibration process mainly works to determine the PID adjustment parameter or part of correction value.
In the prior art, the utilization degree of an offline calibration result is low, each calibration parameter has no reference standard when in online calibration, a technician can only adjust the controllable variable according to own experience to meet the main performance requirement of a galvanic pile when in operation, the shutdown protection is repeatedly carried out when the operation difficulty is high and the calibration is easy to cause, the working efficiency is affected, and the system is easy to damage; meanwhile, the cooling water temperature greatly influencing the electrochemical reaction is not strictly controlled in the current technical scheme, and although the pile can be ensured to be maintained in a required working temperature range through the matching of a heat dissipation system, the great water temperature fluctuation can lead to the failure of reproduction of a calibration result and poor map calibration adaptability; in addition, a large number of parameters are regulated by PID, so that partial parameters are easy to fluctuate greatly to influence the stability of the system observation index, and the calibration operation is difficult to be carried out reliably.
From the above, the online calibration has the problems of complex work and great operation difficulty for technicians, and affects the calibration precision of the fuel cell power generation system.
Disclosure of Invention
In order to solve one of the technical defects, the embodiment of the application provides an online calibration method and device for a fuel cell power generation system and corresponding equipment, which can reduce the operation difficulty of technicians, reduce the workload and the operation risk and effectively improve the online calibration accuracy.
According to a first aspect of an embodiment of the present application, there is provided an online calibration method for a fuel cell power generation system, including:
step S10, setting a temperature interval and a current interval in on-line calibration to obtain m water temperature discrete values in a fuel cell working temperature range and n current discrete values in a fuel cell current output range;
step S20, when the fuel cell power generation system is in an idle state after being started, a switch between the fuel cell power generation system and an electronic load is in an off state, and the electronic load is set to be in a current control mode;
step S30, after the fuel cell power generation system enters a stable state from an idle state, starting temperature control equipment for controlling the water temperature of the fuel cell power generation system and gradually reaching a preset water temperature value;
step S40, sending an initial value of a calibration parameter to the fuel cell power generation system;
s50, obtaining observation index values of the fuel cell power generation system running at different water temperature discrete values and different current discrete values;
comparing the observation index value of each water temperature discrete value and each current discrete value with a preset threshold range respectively, and if the observation index value is in the threshold range, recording calibration parameters; otherwise, sending the adjustment value of the calibration parameter to the fuel cell power generation system, and circularly executing the step S50 until the observation index value is in the set threshold range;
in the step S10, the current interval is determined according to a current-control parameter data table in the off-line calibration map; in the step S40, the initial value of the calibration parameter is set according to the map value calibrated offline.
According to a second aspect of the embodiments of the present application, there is provided an online calibration device for a fuel cell power generation system, including:
an electronic load connected with the fuel cell power generation system;
an electronic load controller for controlling current operating parameters of the electronic load;
the fuel cell controller is used for sending calibration parameters to the fuel cell power generation system;
the temperature control equipment is used for providing a specified water temperature value for the fuel cell power generation system in the online calibration process;
the data acquisition module is used for acquiring an observation index value in the calibration process;
the calibration module is used for determining the temperature interval and the current interval during online calibration before calibration to obtain m water temperature discrete values in the working temperature range of the fuel cell and n current discrete values in the current output range of the fuel cell; when the fuel cell power generation system is in an idle state after being started, a switch between the fuel cell power generation system and an electronic load is in an off state, and the electronic load is set to be in a current control mode; when the fuel cell power generation system enters a stable state from an idle state, controlling the temperature control equipment to start and gradually reach a preset water temperature value;
in the calibration process, according to the observation index value, a calibration parameter adjustment instruction is sent to the fuel cell controller, a current adjustment instruction is sent to the electronic load controller, a water temperature adjustment instruction is sent to the temperature control equipment, and calibration parameters of which the observation index value is in a threshold range are recorded.
According to a third aspect of embodiments of the present application, there is provided an electronic device, including:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method as described above.
According to a fourth aspect of embodiments of the present application, there is provided a computer-readable storage device having a computer program stored thereon; the computer program being executed by a processor to implement the method of any of the preceding claims.
By adopting the online calibration method, the online calibration device and the corresponding equipment of the fuel cell power generation system provided by the embodiment of the application, the steady and adjustable temperature value is adopted as a temperature condition on the basis of offline calibration map; in the online calibration process, the calibration parameter value is adjusted in a mode of collecting and judging the observation index value in the full output range of the fuel cell, so that the safety and high efficiency of the calibration process are ensured, the repeatability of the calibration result is high, the operation difficulty of technicians can be reduced, the workload and the operation risk are reduced, the online calibration accuracy is effectively improved, and the practicability is extremely high.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 is a schematic diagram of a prior art fuel cell calibration method;
FIG. 2 is a schematic flow chart of an online calibration method for a fuel cell power generation system according to an embodiment of the present disclosure;
fig. 3 is a schematic flow chart of step S50 in the embodiment of the present application;
FIG. 4 is a schematic structural diagram of an online calibration device of a fuel cell power generation system according to an embodiment of the present disclosure;
in the figure:
1 is an electronic load, 2 is an electronic load controller, 3 is a fuel cell controller, 4 is a temperature control device, 5 is a data acquisition module, 6 is a calibration module, and 7 is a fuel cell power generation system.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following detailed description of exemplary embodiments of the present application is given with reference to the accompanying drawings, and it is apparent that the described embodiments are only some of the embodiments of the present application and not exhaustive of all the embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
In carrying out the present application, the inventors found that: the output of the fuel cell power generation system is affected by various environmental conditions, and if the calibration work is only carried out under a certain condition or the environmental conditions are unstable during the calibration, the obtained calibration result has poor applicability and is difficult to reproduce, so that the system cannot stably output.
Therefore, the calibration process needs to ensure stable and adjustable environmental parameters, the test process needs to cover various different environments, and the result is ensured to be stable and reproducible.
Example 1
As shown in fig. 2, an embodiment of the present application provides an online calibration method for a fuel cell power generation system, including:
step S10, setting a temperature interval and a current interval in on-line calibration to obtain m water temperature discrete values in a fuel cell working temperature range and n current discrete values in a fuel cell current output range;
step S20, when the fuel cell power generation system is in an idle state after being started, a switch between the fuel cell power generation system and an electronic load is in an off state, and the electronic load is set to be in a current control mode;
step S30, after the fuel cell power generation system enters a stable state from an idle state, starting temperature control equipment for controlling the water temperature of the fuel cell power generation system and gradually reaching a preset water temperature value;
step S40, sending an initial value of a calibration parameter to the fuel cell power generation system;
s50, obtaining observation index values of the fuel cell power generation system running at different water temperature discrete values and different current discrete values;
comparing the observation index value of each water temperature discrete value and each current discrete value with a preset threshold range respectively, and if the observation index value is in the threshold range, recording calibration parameters; otherwise, sending the adjustment value of the calibration parameter to the fuel cell power generation system, and circularly executing the step S50 until the observation index value is in the set threshold range;
in the step S10, the current interval is determined according to a current-control parameter data table in the off-line calibration map; in the step S40, an initial value of the calibration parameter is set according to an off-line calibrated map value;
the preset threshold is set according to the calibration parameters in the off-line calibration map.
Specifically, in the step S20, the current control mode of the electronic load is: and carrying out pulling load on the load according to the set current value.
In this embodiment, the fuel cell power generation system is a calibration object, and includes a galvanic pile, an air supply system, a hydrogen circulation system, and the like, where calibration parameters include: the method comprises the steps of rotating speed of an air compressor, opening of a back pressure valve, opening of an electromagnetic proportional valve, rotating speed of a hydrogen circulating pump, opening interval of a hydrogen discharging valve and opening duration of the hydrogen discharging valve.
In the embodiment, the water temperature which has the greatest influence on the electrochemical reaction of the fuel cell is kept constant through external temperature control equipment (such as a cooling water tower), a plurality of water temperature discrete values are selected in the allowable working temperature range of a galvanic pile to carry out a calibration experiment, a plurality of online maps can be obtained, the calibration result is ensured to adapt to different environmental conditions, and the working state of the fuel cell system during the test can be accurately reproduced through the calibration parameters; the online map obtained by online calibration has good repeatability and strong adaptability to environmental condition changes.
In addition, the air temperature effect has been considered during the off-line calibration phase of the air system, where no test experiments were performed.
The on-line calibration method of the fuel cell power generation system provided by the embodiment is based on off-line calibration map, and adopts stable and adjustable temperature values as temperature conditions; in the online calibration process, the calibration parameter value is adjusted in a mode of collecting and judging the observation index value in the full output range of the fuel cell, so that the safety and high efficiency of the calibration process are ensured, the repeatability of the calibration result is high, the operation difficulty of technicians can be reduced, the workload and the operation risk are reduced, the online calibration accuracy is effectively improved, and the practicability is extremely high.
Example two
As shown in fig. 3, on the basis of the first embodiment, the step S50 includes:
step S501, setting the temperature value of the temperature control device to T w,j ；
Step S502, setting an electronic loadThe output current is I i ；
Step S503, let j=1, i=1, at T w,j 、I i Under the operating condition, obtaining an observation index value of a fuel cell power generation system;
step S504, judging T w,j 、I i If the observed index value under the operation condition is within the threshold range, recording the calibration parameters and executing step S506; otherwise, step S505 is performed;
step S505, transmitting the adjustment value of the calibration parameter to the fuel cell power generation system, and re-executing steps S503 to S504 until T w,j 、I i The observation index value under the operation condition is in the threshold range, and the calibration parameters are recorded;
step S506, let i=i+1, and i < n, and execute step S503 to step S505, and execute the acquisition and judgment of the observation index value corresponding to the next current discrete value until all the current discrete values are traversed;
step S507, let j=j+1 and i < m, and execute steps S503 to S506 until all the water temperature discrete values are traversed;
and finishing the recording of all calibration parameters under the operating conditions of m water temperature discrete values and n current discrete values.
In the present embodiment, the expression of the fuel cell operating temperature range is: [ T ] w,min ,T w,max ]The method comprises the steps of carrying out a first treatment on the surface of the The fuel cell current output range has the expression of [ I ] min ,I max ]The method comprises the steps of carrying out a first treatment on the surface of the In the calibration process:
T w,min ≤T w,j ≤T w,max 、I min ≤I i ≤I max 。
specifically, in the step S50, the observation indexes of the fuel cell power generation system include: cathode-anode differential pressure, monomer separation average difference and monomer voltage average value.
Further, in the step S50, sending the adjustment value of the calibration parameter to the fuel cell power generation system includes:
step S5051, according to the influence of the calibration parameters on the observation indexes, sequencing the influence of the calibration parameters corresponding to each observation index from the size; the method comprises the following steps:
the influence of the calibration parameters on the cathode-anode pressure difference is as follows:
the opening degree of the electromagnetic proportional valve, the rotating speed of the air compressor, the opening degree of the back pressure valve, the rotating speed of the hydrogen circulating pump, the opening interval of the hydrogen discharging valve and the opening duration of the hydrogen discharging valve;
the influence of the calibration parameters on the monomer separation average difference is as follows:
the method comprises the steps of rotating speed of an air compressor, opening interval of a hydrogen discharge valve, opening duration of the hydrogen discharge valve, rotating speed of a hydrogen circulating pump, opening of a back pressure valve and opening of an electromagnetic proportional valve;
the influence of the calibration parameters on the average value of the monomer voltages is as follows:
the method comprises the steps of rotating speed of an air compressor, opening of an electromagnetic proportional valve, rotating speed of a hydrogen circulating pump, opening of a back pressure valve, opening interval of a hydrogen discharge valve and opening duration of the hydrogen discharge valve;
step S5052, judging the deviation direction of the calibration parameters and the threshold range, and sequentially setting the adjustment value of each calibration parameter according to the deviation direction and the influence sequence;
step S5053, the adjustment value of the calibration parameter is sent to the fuel cell power generation system, so that the fuel cell power generation system operates according to the adjustment value of the calibration parameter.
In this embodiment, the deviation direction between the calibration parameter and the threshold range is specifically:
the deviation direction of the cathode-anode pressure difference comprises: cathode inlet pressure is greater than a threshold range and cathode inlet pressure is less than a threshold range;
the deviation direction of the monomer from the mean deviation includes: the mean deviation is greater than a threshold range and the mean deviation is less than the threshold range;
the deviation direction of the average value of the cell voltages includes: the voltage average is above the threshold range and the voltage average is below the threshold range.
TABLE 1 influence relationship of calibration parameters and Observation index
As shown in the table above, the adjustment values of each calibration parameter are set in sequence according to the deviation direction and the influence order; the method specifically comprises the following steps:
establishing a relation table of the deviation direction and each calibration parameter adjustment value;
and outputting the adjustment value of each calibration parameter according to the relation table.
Taking an observation index as an example of the cathode-anode pressure difference, explanation is made:
when the deviation direction of the cathode-anode pressure difference is that the cathode inlet pressure is smaller than the threshold range, the operation of increasing the inlet pressure is needed, and the operation of corresponding calibration parameters comprises:
increasing the opening degree of the electromagnetic proportional valve, increasing the rotating speed of the air compressor, reducing the opening degree of the back pressure valve, increasing the rotating speed of the hydrogen circulating pump, increasing the opening interval of the hydrogen discharge valve and increasing the opening duration of the hydrogen discharge valve.
In this embodiment, the calibration parameters may be sequentially adjusted by setting the calibration parameters/the adjustment amounts of each time according to the influence order until the observation index is within the threshold range;
or setting calibration parameters/adjustment amount of each time, and performing calibration test after adjusting all the calibration parameters until the observation index is in the threshold range.
In this embodiment, the cathode-anode pressure difference, the monomer separation average difference and the monomer voltage average value which have great influence on the safety and performance of the fuel cell are selected as the observation index values, and the influence mode of the calibration parameters on the observation index values and the influence degree of different calibration variables on the same index are quantified.
In addition, as shown in fig. 4, the present application further provides an online calibration device for a fuel cell power generation system, including:
an electronic load 1 connected to a fuel cell power generation system 7;
an electronic load controller 2 for controlling current operation parameters of the electronic load 1;
a fuel cell controller 3 for transmitting calibration parameters to the fuel cell power generation system 7;
the temperature control device 4 is used for providing a specified water temperature value for the fuel cell power generation system 7 in an online calibration process;
the data acquisition module 5 is used for acquiring an observation index value in the calibration process;
the calibration module 6 is used for determining the temperature interval and the current interval during online calibration before calibration to obtain m water temperature discrete values in the working temperature range of the fuel cell and n current discrete values in the current output range of the fuel cell; and when the fuel cell power generation system 7 is in an idle state after being started, a switch between the fuel cell power generation system 7 and the electronic load 1 is in an off state, and the electronic load 1 is set to be in a current control mode; and after the fuel cell power generation system 7 enters a stable state from an idle state, controlling the temperature control device 4 to start and gradually reach a preset water temperature value;
in the calibration process, a calibration parameter adjustment instruction is sent to the fuel cell controller 3 according to the observation index value, a current adjustment instruction is sent to the electronic load controller 2, a water temperature adjustment instruction is sent to the temperature control equipment 4, and calibration parameters of which the observation index value is in a threshold range are recorded.
In addition, the application also provides electronic equipment, which comprises:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method as described above.
Furthermore, the present application also provides a computer-readable storage device having a computer program stored thereon; the computer program being executed by a processor to implement the method of any of the preceding claims.
The method can be applied to the on-line test of fuel cells with different power levels, and is applied to the design and development of a fuel cell system of a certain company, and the application process is as follows:
the net output power of the electric pile of the fuel cell is 30kW, the air supply system and the hydrogen supply system are calibrated off-line, the independent water circulation system is used for controlling the temperature of the cooling water inlet of the electric pile, the fuel cell controller, the electronic load controller and the cooling water circulation controller are uniformly connected into the calibration module, the online calibration experiment is completed by adopting the online calibration method provided by the application, the result shows that the online calibration workload can be greatly reduced by adopting the method, the system is protected and stopped only at partial working condition points in the calibration process, and the calibration result has good stability and strong repeatability.
It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The schemes in the embodiments of the present application may be implemented in various computer languages, for example, C language, VHDL language, verilog language, object-oriented programming language Java, and transliteration scripting language JavaScript, etc.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all such alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims and the equivalents thereof, the present application is intended to cover such modifications and variations.
Claims (10)
1. An on-line calibration method for a fuel cell power generation system is characterized by comprising the following steps:
step S10, setting a temperature interval and a current interval in on-line calibration to obtain m water temperature discrete values in a fuel cell working temperature range and n current discrete values in a fuel cell current output range;
step S20, when the fuel cell power generation system is in an idle state after being started, a switch between the fuel cell power generation system and an electronic load is in an off state, and the electronic load is set to be in a current control mode;
step S30, after the fuel cell power generation system enters a stable state from an idle state, starting temperature control equipment for controlling the water temperature of the fuel cell power generation system and gradually reaching a preset water temperature value;
step S40, sending an initial value of a calibration parameter to the fuel cell power generation system;
s50, obtaining observation index values of the fuel cell power generation system running at different water temperature discrete values and different current discrete values;
comparing the observation index value of each water temperature discrete value and each current discrete value with a preset threshold range respectively, and if the observation index value is in the threshold range, recording calibration parameters; otherwise, sending the adjustment value of the calibration parameter to the fuel cell power generation system, and circularly executing the step S50 until the observation index value is in the set threshold range;
in the step S10, the current interval is determined according to a current-control parameter data table in the off-line calibration map; in the step S40, the initial value of the calibration parameter is set according to the map value calibrated offline.
2. The on-line calibration method of a fuel cell power generation system according to claim 1, wherein the step S50 includes:
step S501, setting the temperature value of the temperature control device to T w,j ；
Step S502, setting the output current of the electronic load as I i ；
Step S503, let j=1, i=1, at T w,j 、I i Under the operating condition, obtaining an observation index value of a fuel cell power generation system;
step S504, judging T w,j 、I i If the observed index value under the operation condition is within the threshold range, recording the calibration parameters and executing step S506; otherwise, step S505 is performed;
step S505, the adjustment value of the calibration parameter is sent to the fuel cell power generation system, and the execution is repeatedSteps S503 to S504 until T w,j 、I i The observation index value under the operation condition is in the threshold range, and the calibration parameters are recorded;
step S506, let i=i+1, and i < n, and execute step S503 to step S505, and execute the acquisition and judgment of the observation index value corresponding to the next current discrete value until all the current discrete values are traversed;
step S507, let j=j+1 and i < m, and execute steps S503 to S506 until all the water temperature discrete values are traversed;
and finishing the recording of all calibration parameters under the operating conditions of m water temperature discrete values and n current discrete values.
3. The method for on-line calibration of a fuel cell power generation system according to claim 1 or 2, wherein the calibration parameters include: the method comprises the steps of rotating speed of an air compressor, opening of a back pressure valve, opening of an electromagnetic proportional valve, rotating speed of a hydrogen circulating pump, opening interval of a hydrogen discharging valve and opening duration of the hydrogen discharging valve.
4. The online calibration method of a fuel cell power generation system according to claim 3, wherein in the step S50, the observation index of the fuel cell power generation system includes: cathode-anode differential pressure, monomer separation average difference and monomer voltage average value.
5. The on-line calibration method of a fuel cell power generation system according to claim 4, wherein in the step S50, sending the adjustment value of the calibration parameter to the fuel cell power generation system comprises:
step S5051, according to the influence of the calibration parameters on the observation indexes, sorting the influence of the calibration parameters corresponding to each observation index; the method comprises the following steps:
the influence of the calibration parameters on the cathode-anode pressure difference is as follows:
the opening degree of the electromagnetic proportional valve, the rotating speed of the air compressor, the opening degree of the back pressure valve, the rotating speed of the hydrogen circulating pump, the opening interval of the hydrogen discharging valve and the opening duration of the hydrogen discharging valve;
the influence of the calibration parameters on the monomer separation average difference is as follows:
the method comprises the steps of rotating speed of an air compressor, opening interval of a hydrogen discharge valve, opening duration of the hydrogen discharge valve, rotating speed of a hydrogen circulating pump, opening of a back pressure valve and opening of an electromagnetic proportional valve;
the influence of the calibration parameters on the average value of the monomer voltages is as follows:
the method comprises the steps of rotating speed of an air compressor, opening of an electromagnetic proportional valve, rotating speed of a hydrogen circulating pump, opening of a back pressure valve, opening interval of a hydrogen discharge valve and opening duration of the hydrogen discharge valve;
step S5052, judging the deviation direction of the calibration parameters and the threshold range, and sequentially setting the adjustment value of each calibration parameter according to the deviation direction and the influence sequence;
step S5053, the adjustment value of the calibration parameter is sent to the fuel cell power generation system, so that the fuel cell power generation system operates according to the adjustment value of the calibration parameter.
6. The online calibration method of a fuel cell power generation system according to claim 5, wherein the deviation direction of the calibration parameter from the threshold range is specifically:
the deviation direction of the cathode-anode pressure difference comprises: cathode inlet pressure is greater than a threshold range and cathode inlet pressure is less than a threshold range;
the deviation direction of the monomer from the mean deviation includes: the mean deviation is greater than a threshold range and the mean deviation is less than the threshold range;
the deviation direction of the average value of the cell voltages includes: the voltage average is above the threshold range and the voltage average is below the threshold range.
7. The method for on-line calibration of a fuel cell power generation system according to claim 1, wherein in the step S20, a current control mode of the electronic load is: and carrying out pulling load on the load according to the set current value.
8. An on-line calibration device of a fuel cell power generation system is characterized in that: comprising the following steps:
an electronic load (1) connected to the fuel cell power generation system (7);
an electronic load controller (2) for controlling a current operating parameter of the electronic load (1);
a fuel cell controller (3) for sending calibration parameters to the fuel cell power generation system (7);
the temperature control device (4) is used for providing a specified water temperature value for the fuel cell power generation system (7) in the online calibration process;
the data acquisition module (5) is used for acquiring an observation index value in the calibration process;
the calibration module (6) is used for determining the temperature interval and the current interval during online calibration before calibration to obtain m water temperature discrete values in the working temperature range of the fuel cell and n current discrete values in the current output range of the fuel cell; when the fuel cell power generation system (7) is in an idle state after being started, a switch between the fuel cell power generation system (7) and the electronic load (1) is in an off state, and the electronic load (1) is set to be in a current control mode; when the fuel cell power generation system (7) enters a stable state from an idle state, the temperature control equipment (4) is controlled to start and gradually reach a preset water temperature value;
in the calibration process, a calibration parameter adjustment instruction is sent to the fuel cell controller (3) according to the observation index value, a current adjustment instruction is sent to the electronic load controller (2), a water temperature adjustment instruction is sent to the temperature control equipment (4), and the calibration parameter of which the observation index value is in a threshold range is recorded.
9. An electronic device, comprising:
a memory;
a processor; and
a computer program;
wherein the computer program is stored in the memory and configured to be executed by the processor to implement the method of any one of claims 1 to 7.
10. A computer readable storage device having a computer program stored thereon; the computer program being executed by a processor to implement the method of any one of claims 1 to 7.
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| CN202310385098.6A CN116387572A (en) | 2023-04-12 | 2023-04-12 | Online calibration method and device for fuel cell power generation system and corresponding equipment |
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| CN202310385098.6A CN116387572A (en) | 2023-04-12 | 2023-04-12 | Online calibration method and device for fuel cell power generation system and corresponding equipment |
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