CN108615917A - A kind of fault detection system and method for solid oxide fuel battery system - Google Patents
A kind of fault detection system and method for solid oxide fuel battery system Download PDFInfo
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- CN108615917A CN108615917A CN201810319708.1A CN201810319708A CN108615917A CN 108615917 A CN108615917 A CN 108615917A CN 201810319708 A CN201810319708 A CN 201810319708A CN 108615917 A CN108615917 A CN 108615917A
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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
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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
- H01M8/04664—Failure or abnormal function
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The invention discloses a kind of fault detection system of solid oxide fuel battery system and methods, fault detection system includes the first proportional component, integral element, second proportional component, first feedback element and the second feedback element, pile inlet temperature is superimposed to integral element input terminal after the first proportional component and integral element after being fed back by the first feedback element successively, pile inlet temperature passes through the first proportional component successively, compared with lower practical SOFC piles outer gas channel temp being run after integral element and the second proportional component with invariable power state, export the SOFC pile outlet temperature margins of error, the margin of error enters the input terminal of integral element by the second feedback element, the fault point of SOFC piles is determined according to the SOFC pile outlet temperature margins of error.Fault detect is carried out by the way of being combined based on mock-up and fault detection system, and the system failure can easily be judged by comparison, fast and effeciently confirm the fault point of system.
Description
Technical field
The invention belongs to high-temperature fuel cell system field of fault detection, are fired more particularly, to a kind of soild oxide
Expect the fault detection system and method for battery system.
Background technology
Solid oxide fuel cell (Solid Oxide Fuel Cell, SOFC) can convert chemical energy to electric energy,
And transformation efficiency is high, and combustion process and mechanical movement is during which not present, therefore be a kind of high efficiency, low noise generation mode.
But since the operating temperature of SOFC piles is usually at 600~800 DEG C, and working environment must be sealing, and
At this stage, as soon as SOFC piles, heat exchanger and exhaust gas combustion chamber are often put together in a hot tank (pile) again, this is it
The tracking of internal state brings difficulty.Simultaneously as lacking the acquisition to SOFC pile inner cases, when it breaks down
When, it also tends to be difficult to find in time.In addition, when its external auxiliary component (Balance of plant, BOP) breaks down,
Also due to the coupled relation of itself and pile, causes to be difficult to differentiate the source of failure to be SOFC piles or other BOP components.
Temperature inside SOFC piles is often one of key index of its performance characterization.Therefore, if can obtain inside it
Temperature conditions is for finding to be of great significance with handling failure in time.But since the sealing requirements inside pile are high,
There are larger risks for injection thermocouple progress temperature sensing inside pile, and cost is higher.In addition to that can be tasted on experimental bench
Examination is squeezed into thermocouple to its inside and is come other than short time measuring temperature, generally directed to high-temperature fuel cell system (Solid Oxide
Fuel Cell System, SOFCs) for, this method does not have operability.
By the retrieval to existing literature, it is not yet found that data proposes SOFCs the hard measurement event based on observer
Hinder detection scheme.
Invention content
For the disadvantages described above or Improvement requirement of the prior art, the present invention provides a kind of solid oxide fuel cell systems
The fault detection system and method for system, its object is to solve existing fault detection system not determining solid oxide fuel
The technical issues of battery system fault point.The safety of raising system and the promptness for finding failure.
To achieve the above object, as an aspect of of the present present invention, the present invention provides a kind of solid oxide fuel cell system
The fault detection system of system, including：
First proportional component, integral element, the second proportional component, the first feedback element and the second feedback element；
Pile inlet temperature is folded after the first proportional component and integral element after being fed back by the first feedback element successively
Integral element input terminal is added to, pile inlet temperature is successively after the first proportional component, integral element and the second proportional component
Compared with running lower practical SOFC piles outer gas channel temp with invariable power state, the SOFC pile outlet temperature margins of error, error are exported
Amount enters the input terminal of integral element by the second feedback element, and SOFC piles are determined according to the SOFC pile outlet temperature margins of error
Fault point.
Preferably, the second feedback element coefficient of the second feedback element is according to formulaIt determines；
Wherein, A, B, C are respectively linearized temperature kinetic modelMiddle sytem matrix, input square
Battle array and output matrix, linearized temperature kinetic model are to carry out linearization process acquisition, electricity to stack temperature kinetic model
Heap temperature dynamics model is according to electric pile structure parameter, stack temperature, pile output power, pile in the case of SOFCs non-faulting
Inlet temperature, pile outer gas channel temp, gas heat content and pile input flow rate obtain；X (t)=[Tr], y (t)=[Tr,ex], u
(t)=[mgas,Tgas,i], mgasTo be passed through the gas molar amount of pile, Tgas,iTo be passed through the gas temperature of pile；It is anti-for first
Feedback link coefficient,For the first proportional component coefficient, K is the second feedback element coefficient, and e (t) is expressed as the operation of invariable power state
The difference of lower practical SOFC piles outer gas channel temp and the pile exterior air drain temperature observation value of the second proportional component output.
Preferably, stack temperature kinetic model is
Wherein, CsFor pile specific heat capacity, TrFor stack temperature, Tfuel,iFor pile Inlet Fuel Temperature, Tr,exOutside for pile
Airway temperature, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains, mfuelTo be passed through
The fuel mole of pile, CVFor the pyroconductivity of pile, WoutFor the output power of pile.
Preferably, the second proportional component coefficient of the second proportional component is linearized temperature kinetic modelMiddle output matrix C；
Wherein, linearized temperature kinetic model is to be obtained by carrying out linearization process to stack temperature kinetic model
, stack temperature kinetic model according to electric pile structure parameter in the case of SOFCs non-faulting, stack temperature, pile output power,
Pile inlet temperature, pile outer gas channel temp, gas heat content and pile input flow rate obtain.
Preferably, the pile inlet temperature is fuel inlet temperature or inlet air temp.
Preferably, the first feedback element coefficient of the first feedback element is according to formulaIt obtains；
Wherein, CsFor the specific heat capacity of pile,Qfuel=
mfuelcfuel(Tr,ex-Tfuel,i), mfuelTo be passed through the fuel mole of pile, cfuelThat indicate is the specific heat capacity of fuel, Tfuel,i
And Tr,exThat indicate respectively is pile Inlet Fuel Temperature and pile outer gas channel temp, TrFor stack temperature, CVIt is passed for the heat of pile
Conductance.
Preferably, the first proportional component coefficient of the first proportional component is according to formulaIt obtains；
Wherein, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains, CsFor electricity
The specific heat capacity of heap, CVFor the pyroconductivity of pile.
As another aspect of the present invention, the present invention provides a kind of fault detect side of solid oxide fuel battery system
Method includes the following steps：
S110 is according to electric pile structure parameter, stack temperature, pile output power, pile inlet temperature, pile exterior air drain temperature
Degree, gas heat content and pile input flow rate, establish stack temperature kinetic model；
S120 carries out linearization process to stack temperature kinetic model, obtains linearized temperature kinetic model
S130 judges whether that can find the second feedback element COEFFICIENT K meets formulaIf so, SOFC piles do not occur event
Barrier, otherwise, SOFC piles break down.
Preferably, in fault detection method, according to formula
Establish stack temperature kinetic model；
Wherein, CsFor pile specific heat capacity, TrFor stack temperature, Tfuel,iFor pile Inlet Fuel Temperature, Tr,exOutside for pile
Airway temperature, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains, mfuelTo be passed through
The fuel mole of pile, CVFor the pyroconductivity of pile, WoutFor the output power of pile.
In general, through the invention it is contemplated above technical scheme is compared with the prior art, can obtain down and show
Beneficial effect：
1, the senser element that the present invention is carried merely with true SOFCs increases equipments and devices without additional, develops one
Corresponding fault detection system is covered, it is the detection for realizing failure to carry out hard measurement using the fault detection system, is both saved
Cost realizes and quickly and efficiently detects failure again.
2, the present invention is a kind of to be confirmed or be excluded to the specific fault point of solid oxide fuel battery system
Detection method, more precisely, it is by the way of a kind of hard measurement, only with reference to the true input quantity and output quantity of system
The method for carrying out fault detect, so as to improve the safety and reliability of system operation.
3, signal extraction derives from the temperature sensor for being placed in pile chamber exterior air drain, and fuel flow meter is corresponding to examine
It surveys module and acquires the relevant real-time parameter of pile, the acquisition of these parameters is used to correct failure in the fault detection system design phase
The feedback oscillator of detecting system, to reach the temperature tracking effect of adjustment fault detection system；In the fault detect stage for sentencing
It is disconnected whether faulty generation.
Description of the drawings
Fig. 1 is the targeted SOFCs structure diagrams of the fault detection system of SOFCs provided by the invention；
Fig. 2 be SOFCs provided by the invention fault detection system in SOFC pile chamber exterior air drain structural schematic diagrams；
Fig. 3 be SOFCs provided by the invention fault detection system in fault detection system structure diagram.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
When there is exception in the reading of system pile inlet flow rate meter and relatively large deviation occurs in pile output power, often without
Method judges that its failure is derived from failure or system other component in flowmeter pile itself.
As shown in Figure 1, solid oxide fuel battery system includes valve 1, air blower 2, flowmeter 3, heat exchanger
4, fuel supply gas cylinder 5, protection gas cylinder 6, SOFC piles 7 and exhaust gas combustion chamber 8.Wherein, fuel supplies 5 heat exchanger of gas cylinder
Be passed through fuel in 4, air be passed through in 2 heat exchanger 4 of air blower, through over-heat-exchanger 4 heat fuel gas and air into
Enter SOFC piles 7, by SOFC piles 7 reaction after export tail gas, tail gas burn in exhaust gas combustion chamber forms exhaust gas, using give up
Gas heats fuel gas and air.Pile uses pile exterior air drain structure, structure type such as Fig. 2 institutes in the present invention
Show, temperature thermo-coupler is placed on pile chamber exterior air drain exit approximation and obtains pile internal temperature.And SOFCs is kept to be in perseverance
Power rating is run, and is stablized convenient for system.
Embodiment one
As shown in figure 3, a kind of fault detection system of solid oxide fuel battery system, fault detection system include：
First proportional component, integral element, the second proportional component, the first feedback element and the second feedback element, pile inlet temperature according to
It is secondary to be superimposed to integral element input terminal, pile after being fed back by the first feedback element after the first proportional component and integral element
Inlet temperature passes through the first proportional component, integral element and the second proportional component and the lower practical SOFC of invariable power state operation successively
Pile outer gas channel temp compares, and exports the SOFC pile outlet temperature margins of error, and the margin of error enters integral by the second feedback element
The input terminal of link determines the fault point of SOFC piles according to the SOFC pile outlet temperature margins of error.
SOFC piles inlet temperature in the SOFCs of operation is extracted, is input in the fault detection system, event is carried out
The detection of barrier, if the observed result of fault detection system, i.e. the second proportional component output pile exterior air drain temperature observation value with
The difference of SOFC piles exterior air drain temperature actual value is less than the threshold value of pile exterior air drain temperature gap in the SOFCs of operation, i.e., electric
Out-pile airway temperature difference tends towards stability, then assert that SOFCS piles do not break down, failure appears in other component, otherwise recognizes
Determine pile and internal fault occur, the threshold value of pile exterior air drain temperature gap is determined by being demarcated to SOFCs, i.e., by repeatedly surveying
The range for measuring pile exterior air drain temperature gap under fault condition, determines the threshold value of pile exterior air drain temperature gap.
Embodiment two
On the basis of embodiment one, the second feedback element coefficient of the second feedback element is according to formulaIt determines；
Wherein,For the first feedback element coefficient,For the first proportional component coefficient, K is the second feedback element coefficient, e
(t) it is expressed as the pile exterior air drain of invariable power state operation lower practical SOFC piles outer gas channel temp and the output of the second proportional component
The difference of temperature observation value.A, B, C are respectively linearized temperature kinetic modelIt is middle sytem matrix, defeated
Enter matrix and output matrix, linearized temperature kinetic model is to carry out linearization process to stack temperature kinetic model to obtain
, stack temperature kinetic model according to electric pile structure parameter in the case of SOFCs non-faulting, stack temperature, pile output power,
Pile inlet temperature, pile outer gas channel temp, gas heat content and pile input flow rate obtain；X (t)=[Tr], y (t)=
[Tr,ex], u (t)=[mgas,Tgas,i], mgasTo be passed through the gas molar amount of pile, Tgas,iTo be passed through the gas temperature of pile；
mgasTo be passed through the gas molar amount of pile, Tgas,iTo be passed through the gas temperature of pile.
When pile inlet temperature and pile input flow rate are respectively pile entering air temperature and pile input air flow
When, mgasTo be passed through the air mole of pile, Tgas,iTo be passed through the air themperature of pile；When pile inlet temperature and pile are defeated
When inbound traffics are respectively pile Inlet Fuel Temperature and pile input fuel flow rate, mgasTo be passed through the fuel mole of pile,
Tgas,iTo be passed through the fuel temperature of pile.
E (t) is obtained according to following equation：
Wherein,K is the feedback oscillator of fault detection system,For x
(t)=[Tr] observation change rate, y (t) indicates the lower practical SOFC piles outer gas channel temp of power rating operation.
Embodiment three
On the basis of embodiment two, stack temperature kinetic model is
Wherein, CsFor pile specific heat capacity, TrFor stack temperature, Tfuel,iFor pile Inlet Fuel Temperature, Tr,exOutside for pile
Airway temperature, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains, mfuelTo be passed through
The fuel mole of pile, CVFor the pyroconductivity of pile, WoutFor the output power of pile.
Example IV
On embodiment one to the basis of any one of embodiment three embodiment, the second proportional component of the second proportional component
Coefficient is linearized temperature kinetic modelMiddle output matrix C；
Wherein, linearized temperature kinetic model is to be obtained by carrying out linearization process to stack temperature kinetic model
, stack temperature kinetic model according to electric pile structure parameter in the case of SOFCs non-faulting, stack temperature, pile output power,
Pile inlet temperature, pile outer gas channel temp, gas heat content and pile input flow rate obtain.
Embodiment five
On the basis of embodiment one to any one of example IV, above-mentioned pile inlet temperature be fuel inlet temperature or
Person's inlet air temp.
Embodiment six
On the basis of embodiment one to any one of example IV, the first feedback element coefficient root of the first feedback element
It is obtained according to following formula：
Wherein, CsFor the specific heat capacity of pile,Qfuel=
mfuelcfuel(Tr,ex-Tfuel,i), mfuelTo be passed through the fuel mole of pile, cfuelThat indicate is the specific heat capacity of fuel, Tfuel,i
And Tr,exThat indicate respectively is pile Inlet Fuel stream temperature and pile outer gas channel temp, TrFor stack temperature, CVFor the heat of pile
Conductivity.
Embodiment seven
On the basis of embodiment one to any one of example IV, the first proportional component coefficient root of the first proportional component
It is obtained according to following formula：
Wherein, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains, CsFor electricity
The specific heat capacity of heap, CVFor the pyroconductivity of pile.
Embodiment eight
On one basis of embodiment, the present invention provides a kind of failure based on above-mentioned solid oxide fuel battery system
Detection method 100, includes the following steps：
S110 is according to electric pile structure parameter, stack temperature, pile output power, pile inlet temperature, pile exterior air drain temperature
Degree, gas heat content and pile input flow rate, establish stack temperature kinetic model；
S120 carries out linearization process to stack temperature kinetic model, obtains linearized temperature kinetic model
S130 judges whether that can find the second feedback element COEFFICIENT K meets formulaIf so, SOFC piles do not occur event
Barrier, otherwise, SOFC piles break down.
Embodiment nine
The integral coefficient of integral element makes the pile outer gas channel temp that the second proportional component exports in fault detection system see
The difference of SOFC pile exterior air drain temperature actual values is less than the threshold of pile exterior air drain temperature gap in measured value and the SOFCs of operation
Value, then the integral coefficient is then appropriate value.
Embodiment ten
By taking the detection of fuel supply fault as an example, a kind of fault detect side based on above-mentioned solid oxide fuel battery system
Method includes that steps are as follows：
Step 1：For true SOFCs, SOFC stack temperature kinetic models to be detected are built, and model is by true
The data verification of real system.
The data of real system include pile entry data and pile outlet data；Pile entry data includes pile entrance
The temperature of air and the flow of pile intake air；Pile outlet data includes pile outer gas channel temp and pile output power；
Fuel flow meter, air flow meter, the fuel and air temperature sensor of pile entrance detect the flow of fuel, air stream successively
Amount, fuel temperature and air themperature.Discharge power sensor is for detecting pile output power.
SOFC stack temperatures kinetic model is built according to the conservation of mass and conservation of energy mechanism, the form of model
For lumped model.Fault detection system designs the SOFC stack temperatures kinetic model according to building to realize.
Final establish meets practical stack temperature kinetic model as follows：
Wherein, CsFor pile specific heat capacity, TrFor stack temperature, Tfuel,iFor pile Inlet Fuel Temperature, Tr,exOutside for pile
Port fuel temperature, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains,
hfuel,i-hr,exFor the heat content change rate that fuel contains, mfuelTo be passed through the fuel mole of pile, CVFor the heat transfer of pile
Rate,The rate of temperature change for being fuel inside pile, WoutFor the output power of pile.
Step 2：Since the temperature model of pile is nonlinear, first to its linearization process, model is obtained
Linear parameter acquires the inearized model of stack temperature further according to obtained linear parameter, if consistent in external input
In the case of, the output difference of two models then recognizes available linearisation stack temperature model within the scope of rational.
Obtain following SOFC stack temperatures state-space model：
Y (t)=Cx (t)
Wherein, A is sytem matrix, and B is input matrix, and C is output matrix, is recognized after being linearized by nonlinear model
It arrives, and is all constant vector.
State vector is temperature x (t)=[T of piler], output vector is outer gas channel temp y (t)=[T of piler,ex]。
U (t) is the amount and its temperature for the fuel for being passed through pile：
U (t)=[mfuel,Tfuel,i]
Step 3：According to true SOFCs, need to estimate the specific heat that the parameter of SOFC stack temperature kinetic models has pile
Hold Cs, pile pyroconductivity CVThe enthalpy change rate h contained with fuelfuel,i-hfuel,o。
The specific heat capacity C of pilesThe accuracy of value is not particularly significant, because it can be by pile chamber outer gas channel temp
Fault detection system carries out feedback compensation.The specific heat capacity of pile is obtained according to following formula：
Wherein, QfuelIndicate to participate in the heat of the fuel of electrochemistry reflection inside pile, Qfuel=mfuelcfuel(Tr,ex-
Tfuel,i), cfuelThat indicate is the specific heat capacity of fuel, Tfuel,iAnd Tr,exWhat is indicated respectively is pile Inlet Fuel stream temperature and electricity
Out-pile airway temperature.
The pyroconductivity C of pileV：Parameter material used in SOFC piles determines.
hfuel,i-hfuel,oThe measurement of enthalpy difference：Temperature sensing on the usually used chamber exterior air drain from mounted on connection pile
Device obtains pile anode chamber temperature.And inlet temperature is then measured using the temperature sensor of pile entrance, it in this way can be with
Ensure effectively approaching for measuring temperature, to acquire.
Establish the output temperature of fault detection system predictionThe input u (t) of measurement and output
It can not survey state variable x's (t) and y (t) to reconstruct.
Wherein,E (t) is the defeated of real system and fault detection system
Going out SOFC pile chamber exterior air drain temperature gaps, K is the feedback oscillator of fault detection system,It is by estimating not
Know the sytem matrix, input matrix that parameter acquires and x (t)=[T obtainedr] observation change rate.
Step 4：Feedback matrix K is reasonably selected so that fault detection system is stablized, then state error can gradually eliminate, i.e.,
Wherein,With A respectively represent be the sytem matrix and linearisation estimated sytem matrix,It is respectively represented with B
Be the sytem matrix and linearisation estimated input matrix.
Theoretically, state error can gradually eliminate, but actually be difficult to realize, and therefore, can only be close to 0, and tend to be steady
It is fixed.When an error occurs, sytem matrix A and input matrix B can change, and state error is caused to dissipate, then conclude that failure goes out
It is existing.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, all within the spirits and principles of the present invention made by all any modification, equivalent and improvement etc., should all include
Within protection scope of the present invention.
Claims (9)
1. a kind of fault detection system of solid oxide fuel battery system, which is characterized in that including：First proportional component,
Integral element, the second proportional component, the first feedback element and the second feedback element；
Pile inlet temperature is superimposed to after the first proportional component and integral element after being fed back by the first feedback element successively
Integral element input terminal, pile inlet temperature successively after the first proportional component, integral element and the second proportional component with perseverance
The lower practical SOFC piles outer gas channel temp of power rating operation compares, and exports the SOFC pile outlet temperature margins of error, margin of error warp
The input terminal that the second feedback element enters integral element is crossed, the event of SOFC piles is determined according to the SOFC pile outlet temperature margins of error
Barrier point.
2. fault detection system as described in claim 1, which is characterized in that the second feedback element coefficient root of the second feedback element
According to formulaIt determines；
Wherein, A, B, C are respectively linearized temperature kinetic modelMiddle sytem matrix, input matrix and
Output matrix, linearized temperature kinetic model are to carry out linearization process acquisition, pile temperature to stack temperature kinetic model
Kinetic model is spent according to electric pile structure parameter, stack temperature, pile output power, pile entrance in the case of SOFCs non-faulting
Temperature, pile outer gas channel temp, gas heat content and pile input flow rate obtain；X (t)=[Tr], y (t)=[Tr,ex], u (t)=
[mgas,Tgas,i], mgasTo be passed through the gas molar amount of pile, Tgas,iTo be passed through the gas temperature of pile；For the first feedback loop
Coefficient is saved,For the first proportional component coefficient, K is the second feedback element coefficient, and it is lower real that e (t) is expressed as the operation of invariable power state
The difference of border SOFC pile outer gas channel temps and the pile exterior air drain temperature observation value of the second proportional component output.
3. fault detection system as claimed in claim 2, which is characterized in that stack temperature kinetic model is
Wherein, CsFor pile specific heat capacity, TrFor stack temperature, Tfuel,iFor pile Inlet Fuel Temperature, Tr,exFor pile exterior air drain
Temperature, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains, mfuelTo be passed through pile
Fuel mole, CVFor the pyroconductivity of pile, WoutFor the output power of pile.
4. the fault detection system as described in any one of claims 1 to 3, which is characterized in that the second ratio of the second proportional component
Link coefficient is linearized temperature kinetic modelMiddle output matrix C；
Wherein, linearized temperature kinetic model is by carrying out linearization process acquisition, electricity to stack temperature kinetic model
Heap temperature dynamics model is according to electric pile structure parameter, stack temperature, pile output power, pile in the case of SOFCs non-faulting
Inlet temperature, pile outer gas channel temp, gas heat content and pile input flow rate obtain.
5. such as Claims 1-4 any one of them fault detection system, which is characterized in that the pile inlet temperature is combustion
Expect inlet temperature or inlet air temp.
6. such as Claims 1-4 any one of them fault detection system, which is characterized in that the first of the first feedback element is anti-
Feedback link coefficient is according to formulaIt obtains；
Wherein, CsFor the specific heat capacity of pile,Qfuel=mfuelcfuel
(Tr,ex-Tfuel,i), mfuelTo be passed through the fuel mole of pile, cfuelThat indicate is the specific heat capacity of fuel, Tfuel,iAnd Tr,exPoint
That do not indicate is pile Inlet Fuel Temperature and pile outer gas channel temp, TrFor stack temperature, CVFor the pyroconductivity of pile.
7. such as Claims 1-4 any one of them fault detection system, which is characterized in that the first ratio of the first proportional component
Example link coefficient is according to formulaIt obtains；
Wherein, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains, CsFor pile
Specific heat capacity, CVFor the pyroconductivity of pile.
8. a kind of fault detection method of solid oxide fuel battery system, which is characterized in that include the following steps：
S110 is according to electric pile structure parameter, stack temperature, pile output power, pile inlet temperature, pile outer gas channel temp, gas
Body heat enthalpy and pile input flow rate, establish stack temperature kinetic model；
S120 carries out linearization process to stack temperature kinetic model, obtains linearized temperature kinetic model
S130 judges whether that can find the second feedback element COEFFICIENT K meets formulaIf so, SOFC piles do not occur event
Barrier, otherwise, SOFC piles break down.
9. fault detection method as claimed in claim 8, which is characterized in that according to formulaEstablish stack temperature kinetic model；
Wherein, CsFor pile specific heat capacity, TrFor stack temperature, Tfuel,iFor pile Inlet Fuel Temperature, Tr,exFor pile exterior air drain
Temperature, hfuel,iFor the heat content that pile Inlet Fuel contains, hr,exFor the heat content that pile outlet fuel contains, mfuelTo be passed through pile
Fuel mole, CVFor the pyroconductivity of pile, WoutFor the output power of pile.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109888338A (en) * | 2019-02-20 | 2019-06-14 | 华中科技大学鄂州工业技术研究院 | SOFC gas supply fault detection method and equipment based on statistics |
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