CN107845824A - A kind of control method and system for realizing fuel cell array optimum efficiency section - Google Patents

A kind of control method and system for realizing fuel cell array optimum efficiency section Download PDF

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Publication number
CN107845824A
CN107845824A CN201710356311.5A CN201710356311A CN107845824A CN 107845824 A CN107845824 A CN 107845824A CN 201710356311 A CN201710356311 A CN 201710356311A CN 107845824 A CN107845824 A CN 107845824A
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fuel cell
fuel
fuel cells
max
power
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CN107845824B (en
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王天宏
李奇
陈维荣
戴朝华
于爽
朱亚男
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Southwest Jiaotong University
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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
    • H01M8/04537—Electric variables
    • H01M8/04544—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
    • 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
    • H01M8/04537—Electric variables
    • H01M8/04544—Voltage
    • H01M8/04559—Voltage of fuel cell stacks
    • 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
    • H01M8/04537—Electric variables
    • H01M8/04574—Current
    • 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
    • H01M8/04537—Electric variables
    • H01M8/04574—Current
    • H01M8/04589—Current of fuel cell stacks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • 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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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Fuel Cell (AREA)

Abstract

The present invention discloses a kind of control method and system for realizing fuel cell array optimum efficiency section, the present invention monitors situations such as voltage of each fuel cell output, electric current in real time, according to measured signal analysis operation of fuel cells performance, on the premise of power demand is met, each unit in fuel cell array is controlled to be in optimum Working；On the premise of fuel cell start and stop unit frequency is reduced, control each fuel cell to be operated in " between high efficient area " as much as possible, maximumlly economized on resources using Hydrogen Energy, realize the purpose of fuel economy.Fuel cell performance smoothly switches fuel cell output state, ensures that it exports forward mutation assay and inverse transition in tolerance interval, effectively extends fuel cell service life, reduce system cost.

Description

A kind of control method and system for realizing fuel cell array optimum efficiency section
Technical field
The invention belongs to field of fuel cell technology, and fuel cell array optimum efficiency section is realized more particularly to one kind Control method and system.
Background technology
More stack fuel cell connection in series-parallel form fuel cell array electricity generation system, can both increase fuel battery voltage and power Grade, and can neatly distribute fuel cell output electric energy, fuel cell is in optimum Working.Work as fuel cell array In some operation of fuel cells hydraulic performance decline, change according to situation and fuel cell operation status or cut off the fuel cell, be System remains to normal work.Corresponding control strategy is taken to the fuel cell that service behaviour has declined in addition, is also beneficial to carry The service life of high fuel cell, system cost is reduced, improve the stability of a system.Fuel cell array control method is ground Study carefully, may advantageously facilitate use of the fuel cell in fields such as communications and transportation, micro-capacitance sensors.
The existing control method to fuel cell array, stay in mostly to MPPT maximum power point tracking or pressure point of maximum efficiency Tracking, the operating efficiency for mainly improving fuel cell of consideration, to realize the purpose of fuel economy；But its work is imitated Rate, does not account for fuel cell service life, does not account for the system safety caused by operation of fuel cells hydraulic performance decline yet Problem.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of controlling party for realizing fuel cell array optimum efficiency section Method and system, ensure that each unit is in optimum Working in fuel cell array, effectively reduces fuel cell start and stop Frequency, fuel cell service life is improved, fuel cell is operated in " between high efficient area " as much as possible, realizes fuel economy Purpose, reduce cost, improve stability.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：
A kind of control method for realizing fuel cell array optimum efficiency section, including step：
The fuel battery voltage and fuel cell current of each fuel cell output, are adopted in S100 collection fuel cell arrays Collection and the converter voltage and converter current of the converter output of each fuel cell cascade, the load electricity of collection load input Pressure and load current；
S200 is by fuel battery voltage, fuel cell current, load voltage, load current, converter voltage and converter Electric current carries out data and is fitted to obtain fuel cell efficiency current curve and fuel battery power current curve；
S300 fuel cell efficiency current curves, setting fuel cell maximum power electric current IP_max, fuel cell most High-power PFC_maxWith fuel cell maximum power voltage VP_maxValue；Fuel cell power current curve, setting fuel electricity Pond maximal efficiency electric current IE_maxWith fuel cell maximal efficiency powerValue；Fuel cell maximal efficiency electric current IE_maxSet fuel cell maximal efficiency fluctuating current Δ IEValue；Fuel cell maximal efficiency powerSetting combustion Expect battery maximal efficiency fluctuating power Δ PEValue；Value set by above need to meet restrictive condition：IE_max+ΔIE-IP_max＜ IP_max* 2% and
According to system requirements, initialization system busbar voltage VbusWith loading demand peak power Pload_max, wherein loading demand Peak power meets
Fuel cell characteristic, fuel cell maximum forward fluctuating power Δ P is setP_maxWith fuel cell maximum reverse Fluctuating power Δ PN_maxValue；
S400 fuel cell peak powers PFC_max, fuel cell maximal efficiency powerWith fuel cell most Big efficiency fluctuation power Δ PEDivide bearing power PloadScope；In the different range divided, fuel cell is maximum Power current IP_max, fuel cell maximum power voltage VP_max, fuel cell maximal efficiency electric current IE_max, fuel cell it is maximum Efficiency fluctuation electric current Δ IE, fuel cell maximum forward fluctuating power Δ PP_max, fuel cell maximum reverse fluctuating power Δ PN_max, system operating voltage VbusAnd/or loading demand peak power Pload_max, determine each fuel in each fuel cell array The operating mode of the converter of battery cascade, so as to control the output state of fuel cell array.
It is further that the step S400 includes step：
S410 sets No. 5 of No. 1 converter cascaded with No. 1 fuel cell and setting and No. 5 fuel cells cascades first The output voltage of converter is constant to be
S420 detection bearing powers Pload：
(1) whenStart No. 1 fuel cell and No. 5 fuel cells divide bearing power equally；
(2) whenWhen, according to No. 1 fuel cell and the electricity of No. 5 fuel cells Pressure, determine the operating mode of No. 1 fuel cell and No. 5 fuel cells；
(3) whenWhen, start No. 2 fuel cells and No. 6 fuel cell supplements lack Volume power；No. 1 fuel cell and No. 5 fuel cells are constant with electric current I simultaneouslyE_max-ΔIEOutput；
(4) whenWhen, start No. 1 fuel cell, No. 2 fuel electricity Pond, No. 5 fuel cells and No. 6 fuel cells and with electric currentIt is constant defeated Go out；
(5) whenWhen, according to No. 1 fuel cell and the electricity of No. 2 fuel cells Pressure, and the voltage of No. 5 fuel cells and No. 6 fuel cells；Determine No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel electricity Pond, No. 5 fuel cells, the operating mode of No. 6 fuel cells and No. 7 fuel cells；
(6) 4P is worked asFC_max＜ Pload≤6PFC_maxWhen, start No. 3 fuel cells and No. 7 fuel cell supplement vacancy power；
(7) 6P is worked asFC_max＜ Pload≤Pload_maxWhen, start No. 4 fuel cells and No. 8 fuel cell supplement vacancy power.
It is further that step (2) includes：
(21) if the voltage of only No. 1 fuel cell is less than fuel cell maximum power voltage VP_max, start No. 2 fuel electricity Pond supplements vacancy power；And constant No. 1 fuel cell is with electric current IE_max-ΔIEOutput, No. 5 fuel cells are maximum with fuel cell Power current IP_maxConstant output；
(22) if the voltage of only No. 5 fuel cells is less than fuel cell maximum power voltage VP_max, start No. 6 fuel electricity Pond supplements vacancy power；Constant No. 5 fuel cells are with electric current IE_max-ΔIEOutput, No. 1 fuel cell is with fuel cell maximum work Rate electric current IP_maxConstant output；
(23) if the voltage of No. 1 fuel cell and No. 5 fuel cells is respectively less than fuel cell maximum power voltage VP_max, open Move No. 2 fuel cells and No. 6 fuel cell supplement vacancy power；Constant No. 1 fuel cell and No. 5 fuel cells are with electric current IE_max-ΔIEOutput；
(24) if above state is unsatisfactory for, constant No. 1 fuel cell and No. 5 fuel cells are with fuel cell maximum power Electric current IP_maxOutput；
In addition, when load demand power increase, it is positive that fuel cell power output changing value is less than fuel cell Fluctuating power Δ PP_max；When load demand power reduces, it is anti-that fuel cell power output changing value is less than fuel cell To fluctuating power Δ PN_max。
It is further that step (5) includes：
(51) if the voltage of No. 1 fuel cell and No. 2 fuel cells is equal to fuel cell maximum power voltage VP_max, it is permanent Fixed No. 1 fuel cell and No. 2 fuel cells are with fuel cell maximum power electric current IP_maxOutput；
(52) if the voltage of any one is less than fuel cell maximum power electricity in No. 1 fuel cell and No. 2 fuel cells Press VP_max；Start No. 3 fuel cell replenishment system vacancy power, wherein whenWhen, constant No. 1 and 2 Number fuel cell is with electric current IE_max-ΔIEOutput；WhenWhen, No. 1 fuel cell, No. 2 fuel cells With No. 3 fuel cells with electric currentIt is constant Output；
(53) if the voltage of No. 5 fuel cells and No. 6 fuel cells is equal to fuel cell maximum power voltage VP_max, it is permanent Fixed No. 5 and No. 6 fuel cells are with fuel cell maximum power electric current IP_maxOutput；
(54) if any one voltage is less than fuel cell maximum power voltage in No. 5 fuel cells and No. 6 fuel cells VP_max, start No. 7 fuel cell supplement vacancy power；WhenWhen, constant No. 5 and No. 6 fuel cells With electric current IE_max-ΔIEOutput；WhenWhen, No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel Battery is with electric currentConstant output；
Wherein, when load demand power increase, it is positive that fuel cell power output changing value is less than fuel cell Fluctuating power Δ PP_max；When load demand power reduces, it is anti-that fuel cell power output changing value is less than fuel cell To fluctuating power Δ PN_max。
It is further that step (6) includes：
JudgeWhether set up；
If so, whenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 5 fuel cells and 6 Number fuel cell is with electric current IE_max-ΔIEConstant output；WhenWhen, 1 Number fuel cell, No. 2 fuel cells, No. 3 fuel cells, No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells are with electricity StreamConstant output；WhenWhen, Divide following four situation：1. if the voltage of No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells is equal to fuel cell most High-power voltage VP_max, constant No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with fuel cell maximum power electric current IP_maxOutput；2. if the voltage of any one is less than fuel cell in No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells Peak power voltage VP_max, start No. 4 fuel cell replenishment system vacancy power；WhenWhen, it is permanent Fixed No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells and No. 4 fuel cells are equal With electric currentOutput；If 3. No. 5 fuel cells, No. 6 combustions The voltage of material battery and No. 7 fuel cells is equal to fuel cell maximum power voltage VP_max, constant No. 5 fuel cells, No. 6 combustions Expect battery and No. 7 fuel cells with fuel cell maximum power electric current IP_maxOutput；If 4. No. 5 fuel cells, No. 6 fuel cells It is less than fuel cell maximum power voltage V with the voltage of any one in No. 7 fuel cellsP_max, start No. 8 fuel cell supplements System vacancy power；WhenWhen, constant No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells With electric current IE_max-ΔIEOutput；WhenWhen, constant No. 5 fuel cells, No. 6 fuel cells, No. 7 Fuel cell and No. 8 fuel cells are with electric current Output.
IfIt is invalid：WhenWhen, No. 1 fuel cell, 2 Number fuel cell, No. 3 fuel cells, No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells are with electric currentConstant output；WhenWhen, Divide following four situation：1. if the voltage of No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells is equal to fuel cell most High-power voltage VP_max, constant No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with fuel cell maximum power electric current IP_maxOutput；2. if the voltage of any one is less than fuel cell in No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells Peak power voltage VP_max, start No. 4 fuel cell replenishment system vacancy power；WhenWhen, it is permanent Fixed No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells and No. 4 fuel cells are equal With electric currentOutput；If 3. No. 5 fuel electricity The voltage in pond, No. 6 fuel cells and No. 7 fuel cells is equal to fuel cell maximum power voltage VP_max, constant No. 5 fuel electricity Pond, No. 6 fuel cells and No. 7 fuel cells are with fuel cell maximum power electric current IP_maxOutput；If 4. No. 5 fuel cells, No. 6 The voltage of any one is less than fuel cell maximum power voltage V in fuel cell and No. 7 fuel cellsP_max, start No. 8 fuel Battery replenishment system vacancy power；WhenWhen, constant No. 5 fuel cells, No. 6 fuel cells and No. 7 Fuel cell is with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 5 fuel cells, No. 6 fuel Battery, No. 7 fuel cells and No. 8 fuel cells are with electric currentOutput；
When load demand power increase, fuel cell power output changing value is less than the positive fluctuation work(of fuel cell Rate Δ PP_max；When load demand power reduces, fuel cell power output changing value reversely fluctuates less than fuel cell Power Δ PN_max。
It is further that step (7) includes：
JudgeWhether set up；
If set up：WhenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, 5 Number fuel cell, No. 6 fuel cells and No. 7 fuel cells are with electric current IE_max-ΔIEConstant output；WhenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, No. 4 fuel electricity Pond, No. 5 fuel cells, No. 6 fuel cells, No. 7 fuel cells and No. 8 fuel cells are with electric currentConstant output；
IfIt is invalid：No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, 4 Number fuel cell, No. 5 fuel cells, No. 6 fuel cells, No. 7 fuel cells and No. 8 fuel cells are with electric currentConstant output；
When load demand power increase, fuel cell power output changing value is less than the positive fluctuation work(of fuel cell Rate Δ PP_max；When load demand power reduces, fuel cell power output changing value reversely fluctuates less than fuel cell Power Δ PN_max。
On the other hand, present invention also offers a kind of control system for realizing fuel cell array optimum efficiency section, bag Include fuel cell array system, power-generating control system and load；The power output end of the fuel cell array system is connected to The power input of load, the power-generating control system are respectively connecting on the inlet wire of fuel cell array system and load；
The fuel cell array system includes multiple fuel cell arrays being serially connected, the fuel cell array bag Multiple fuel cells and the converter with fuel cell cascade are included, each converter is parallel with one another；
The power-generating control system includes the generation control unit of fuel cell array and for acquisition system voltage x current The acquisition and conditioning circuit of signal, gather the fuel battery voltage and fuel cell of each fuel cell output in fuel cell array Electric current, the converter voltage and converter current of collection and the converter output of each fuel cell cascade, collection load input Load voltage and load current, and transmit a signal to fuel cell array generation control unit；The fuel cell array Generation control unit is additionally coupled to each converter.
The voltage and current signal that power-generating control system is fed back by handling acquisition and conditioning circuit, analyzes operation of fuel cells Performance；When some cell operation performance has declined in array, its working condition can be changed or cut off the fuel cell, lacked Forehead point is supplemented by remaining element, effectively improves the stability of a system.
It is further that the fuel cell array generation control unit includes FPGA controller, A/D convertor circuit and PWM Control circuit, the FPGA controller connect A/D convertor circuit and pwm control circuit, the A/D convertor circuit connection collection respectively Modulate circuit, the pwm control circuit are connected to each converter.
The voltage and current signal that the present invention need to gather is more, using more than FPGA controller Peripheral Interface quantity and can be any The advantages of configuration；After the acquired modulate circuit of big voltage and current is conditioned, FPGA controller is collected by A/D convertor circuit In, using its calculating speed it is fast the advantages of, data after control algolithm is handled pwm control circuit start working, control converter, Realize the purpose of control fuel cell power generation.
It is further that the fuel cell array electricity generation system includes two fuel cell arrays, each fuel cell Array includes four fuel cells, and respective converter is both provided with each fuel cell.
It is further that the converter is the straight Boost of crisscross parallel topological structure.
Using the beneficial effect of the technical program：
Fuel cell array control method of the invention based on optimal power section；By operation of fuel cells performance, system Net operating efficiency, fuel cell exporting change scope etc. are used as primary consideration, and increase system job stability and safety are Number；
The present invention monitors situations such as voltage of each fuel cell output, electric current in real time, according to measured signal analysis fuel Battery service behaviour, on the premise of power demand is met, each unit in fuel cell array is controlled to be in best effort shape State；Ensure that each unit is in optimum Working in fuel cell array, effectively reduces fuel cell start and stop unit frequency, carries High fuel cell service life, reduce system cost；
Control method proposed by the invention considers system net operating efficiency, is reducing fuel cell start and stop unit frequency Under the premise of, fuel cell is operated in " between high efficient area " as much as possible according to actual conditions, maximumlly utilize Hydrogen Energy saving Resource, the purpose of fuel economy is realized, reduce cost, improve stability and security；
Control method proposed by the invention considers that the positive fluctuation of fuel cell output electric energy and negative sense fluctuation all should be located In in certain limit, setting maximum fluctuation scope positively and negatively, with reference to system power demand, each unit in array is matched In optimum Working；Fuel cell performance smoothly switches fuel cell output state, ensures that its output is positive prominent Become and inverse transition is in tolerance interval, effectively extend fuel cell service life, reduce system cost；
Control method proposed by the invention is extremely inefficient when being run in view of fuel cell with low current condition, meanwhile, The repeatedly starting and stopping machine of fuel cell is unfavorable for improving fuel cell service life；Optimal power allocation algorithm is formed, reduces fuel The start and stop unit frequency of battery.
The present invention can improve operating efficiency and fuel battery performance and service life of system etc., suitable for high pressure, The fuel cell array array apparatus and control method of high power applications occasion.
Brief description of the drawings
Fig. 1 is a kind of control method schematic flow sheet for realizing fuel cell array optimum efficiency section of the present invention；
Fig. 2 is a kind of flow for the control method for realizing fuel cell array optimum efficiency section in the embodiment of the present invention Figure；
Fig. 3 is that a kind of structure for the control system for realizing fuel cell array optimum efficiency section is shown in the embodiment of the present invention It is intended to；
Wherein, 100 be fuel cell array system, and 200 be power-generating control system, and 300 be load；001 and 002 is fuel Array, 003 is acquisition and conditioning circuit, and 004 is generation control unit.
Embodiment
In order that the object, technical solutions and advantages of the present invention are clearer, the present invention is made below in conjunction with the accompanying drawings into one Step illustrates.
In the present embodiment, referring to shown in Fig. 1 and Fig. 2, the present invention proposes one kind and realizes the optimal effect of fuel cell array The control method in rate section, including step：
The fuel battery voltage and fuel cell current of each fuel cell output, are adopted in S100 collection fuel cell arrays Collection and the converter voltage and converter current of the output of the converter of each fuel cell cascade, the load of collection load input Voltage and load current；
S200 is by fuel battery voltage, fuel cell current, load voltage, load current, converter voltage and converter Electric current carries out data and is fitted to obtain fuel cell efficiency current curve and fuel battery power current curve；
S300 fuel cell efficiency current curves, setting fuel cell maximum power electric current IP_max, fuel cell most High-power PFC_maxWith fuel cell maximum power voltage VP_maxValue；Fuel cell power current curve, setting fuel electricity Pond maximal efficiency electric current IE_maxWith fuel cell maximal efficiency powerValue；Fuel cell maximal efficiency electric current IE_maxSet fuel cell maximal efficiency fluctuating current Δ IEValue；Fuel cell maximal efficiency powerSetting combustion Expect battery maximal efficiency fluctuating power Δ PEValue；Value set by above need to meet restrictive condition：IE_max+ΔIE-IP_max＜ IP_max* 2%,
According to system requirements, initialization system busbar voltage VbusWith loading demand peak power Pload_max, wherein loading demand Peak power meets
Fuel cell characteristic, fuel cell maximum forward fluctuating power Δ P is setP_maxWith fuel cell maximum reverse Fluctuating power Δ PN_maxValue；
S400 fuel cell peak powers PFC_max, fuel cell maximal efficiency powerWith fuel cell most Big efficiency fluctuation power Δ PEDivide bearing power PloadScope；In the different range divided, fuel cell is maximum Power current IP_max, fuel cell maximum power voltage VP_max, fuel cell maximal efficiency electric current IE_max, fuel cell it is maximum Efficiency fluctuation electric current Δ IE, fuel cell maximum forward fluctuating power Δ PP_max, fuel cell maximum reverse fluctuating power Δ PN_max, system operating voltage VbusAnd/or loading demand peak power Pload_max, determine each fuel in each fuel cell array The operating mode of the converter of battery cascade, so as to control the output state of fuel cell array.
The step S400 includes step：
S410 is according to system operating voltage Vbus, setting cascades with No. 1 fuel cell first No. 1 converter and setting and 5 The output voltage of No. 5 converters of number fuel cell cascade is constant to be
S420 detection bearing powers Pload：
(1) whenStart No. 1 fuel cell and No. 5 fuel cells divide bearing power equally；
(2) whenWhen, according to No. 1 fuel cell and the electricity of No. 5 fuel cells Pressure, determine the operating mode of No. 1 fuel cell and No. 5 fuel cells；
Step (2) includes：
(21) if the voltage of only No. 1 fuel cell is less than fuel cell maximum power voltage VP_max, start No. 2 fuel electricity Pond supplements vacancy power；And constant No. 1 fuel cell is with electric current IE_max-ΔIEOutput, No. 5 fuel cells are maximum with fuel cell Power current IP_maxConstant output；
(22) if the voltage of only No. 5 fuel cells is less than fuel cell maximum power voltage VP_max, start No. 6 fuel electricity Pond supplements vacancy power；Constant No. 5 fuel cells are with electric current IE_max-ΔIEOutput, No. 1 fuel cell is with fuel cell maximum work Rate electric current IP_maxConstant output；
(23) if the voltage of No. 1 fuel cell and No. 5 fuel cells is respectively less than fuel cell maximum power voltage VP_max, open Move No. 2 fuel cells and No. 6 fuel cell supplement vacancy power；Constant No. 1 fuel cell and No. 5 fuel cells are with electric current IE_max-ΔIEOutput；
(24) if above state is unsatisfactory for, constant No. 1 fuel cell and No. 5 fuel cells are with fuel cell maximum power Electric current IP_maxOutput；
In addition, when load demand power increase, it is positive that fuel cell power output changing value is less than fuel cell Fluctuating power Δ PP_max；When load demand power reduces, it is anti-that fuel cell power output changing value is less than fuel cell To fluctuating power Δ PN_max。
(3) whenWhen, start No. 2 fuel cells and No. 6 fuel cell supplements lack Volume power；No. 1 fuel cell and No. 5 fuel cells are constant with electric current I simultaneouslyE_max-ΔIEOutput；
(4) whenWhen, start No. 1 fuel cell, No. 2 fuel electricity Pond, No. 5 fuel cells and No. 6 fuel cells and with electric currentIt is constant defeated Go out；
(5) whenWhen, according to No. 1 fuel cell and the electricity of No. 2 fuel cells Pressure, and the voltage of No. 5 fuel cells and No. 6 fuel cells；Determine No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel electricity Pond, No. 5 fuel cells, the operating mode of No. 6 fuel cells and No. 7 fuel cells；
Step (5) includes：
(51) if the voltage of No. 1 fuel cell and No. 2 fuel cells is equal to fuel cell maximum power voltage VP_max, it is permanent Fixed No. 1 fuel cell and No. 2 fuel cells are with fuel cell maximum power electric current IP_maxOutput；
(52) if the voltage of any one is less than fuel cell maximum power electricity in No. 1 fuel cell and No. 2 fuel cells Press VP_max；Start No. 3 fuel cell replenishment system vacancy power, wherein whenWhen, constant No. 1 and 2 Number fuel cell is with electric current IE_max-ΔIEOutput；WhenWhen, No. 1 fuel cell, No. 2 fuel cells With No. 3 fuel cells with electric currentIt is constant Output；
(53) if the voltage of No. 5 fuel cells and No. 6 fuel cells is equal to fuel cell maximum power voltage VP_max, it is permanent Fixed No. 5 and No. 6 fuel cells are with fuel cell maximum power electric current IP_maxOutput；
(54) if any one voltage is less than fuel cell maximum power voltage in No. 5 fuel cells and No. 6 fuel cells VP_max, start No. 7 fuel cell supplement vacancy power；WhenWhen, constant No. 5 and No. 6 fuel electricity Pond is with electric current IE_max-ΔIEOutput；WhenWhen, No. 5 fuel cells, No. 6 fuel cells and No. 7 combustions Expect battery with electric currentConstant output；
Wherein, when load demand power increase, it is positive that fuel cell power output changing value is less than fuel cell Fluctuating power Δ PP_max；When load demand power reduces, it is anti-that fuel cell power output changing value is less than fuel cell To fluctuating power Δ PN_max。
Work as 4PFC_max＜ Pload≤6PFC_maxWhen, start No. 3 fuel cells and No. 7 fuel cell supplement vacancy power；
Step (6) includes：
JudgeWhether set up；
If so, whenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 5 fuel cells and 6 Number fuel cell is with electric current IE_max-ΔIEConstant output；WhenWhen, 1 Number fuel cell, No. 2 fuel cells, No. 3 fuel cells, No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells are with electricity StreamConstant output；WhenWhen, Divide following four situation：1. if the voltage of No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells is equal to fuel cell most High-power voltage VP_max, constant No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with fuel cell maximum power electric current IP_maxOutput；2. if the voltage of any one is less than fuel cell in No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells Peak power voltage VP_max, start No. 4 fuel cell replenishment system vacancy power；WhenWhen, it is permanent Fixed No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells and No. 4 fuel cells are equal With electric currentOutput；If 3. No. 5 fuel electricity The voltage in pond, No. 6 fuel cells and No. 7 fuel cells is equal to fuel cell maximum power voltage VP_max, constant No. 5 fuel electricity Pond, No. 6 fuel cells and No. 7 fuel cells are with fuel cell maximum power electric current IP_maxOutput；If 4. No. 5 fuel cells, No. 6 The voltage of any one is less than fuel cell maximum power voltage V in fuel cell and No. 7 fuel cellsP_max, start No. 8 fuel Battery replenishment system vacancy power；WhenWhen, constant No. 5 fuel cells, No. 6 fuel cells and No. 7 Fuel cell is with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 5 fuel cells, No. 6 combustions Material battery, No. 7 fuel cells and No. 8 fuel cells are exported with electric current.
IfIt is invalid：WhenWhen, No. 1 fuel cell, 2 Number fuel cell, No. 3 fuel cells,No. 5 Fuel cell, No. 6 fuel cells and No. 7 fuel cells are with electric currentIt is permanent Fixed output；WhenWhen, divide following four situation：If 1. No. 1 fuel cell, No. 2 fuel The voltage of battery and No. 3 fuel cells is equal to fuel cell maximum power voltage VP_max, constant No. 1 fuel cell, No. 2 fuel Battery and No. 3 fuel cells are with fuel cell maximum power electric current IP_maxOutput；If 2. No. 1 fuel cell, No. 2 fuel cells and The voltage of any one is less than fuel cell maximum power voltage V in No. 3 fuel cellsP_max, start No. 4 fuel cell supplement systems System vacancy power；WhenWhen, constant No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are equal With electric current IE_max-ΔIEOutput；WhenWhen, constant No. 1 fuel cell, No. 2 fuel cells, No. 3 combustions Expect battery and No. 4 fuel cells with electric current Output；3. if the voltage of No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells is equal to fuel cell maximum power voltage VP_max, constant No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells are with fuel cell maximum power electric current IP_maxOutput； 4. if the voltage of any one is less than fuel cell maximum power in No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells Voltage VP_max, start No. 8 fuel cell replenishment system vacancy power；WhenWhen, constant No. 5 fuel Battery, No. 6 fuel cells and No. 7 fuel cells are with electric current IE_max-ΔIEOutput；WhenWhen, it is permanent Fixed No. 5 fuel cells, No. 6 fuel cells, No. 7 fuel cells and No. 8 fuel cells are with electric currentOutput；
When load demand power increase, fuel cell power output changing value is less than the positive fluctuation work(of fuel cell Rate Δ PP_max；When load demand power reduces, fuel cell power output changing value reversely fluctuates less than fuel cell Power Δ PN_max。
(7) 6P is worked asFC_max＜ Pload≤Pload_maxWhen, start No. 4 fuel cells and No. 8 fuel cell supplement vacancy power.
Step (7) includes：
JudgeWhether set up；
If set up：WhenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, 5 Number fuel cell, No. 6 fuel cells and No. 7 fuel cells are with electric current IE_max-ΔIEConstant output；WhenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, No. 4 fuel electricity Pond, No. 5 fuel cells, No. 6 fuel cells, No. 7 fuel cells and No. 8 fuel cells are with electric currentConstant output；
IfIt is invalid：No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, 4 Number fuel cell, No. 5 fuel cells, No. 6 fuel cells, No. 7 fuel cells and No. 8 fuel cells are with electric currentConstant output；
When load demand power increase, fuel cell power output changing value is less than the positive fluctuation work(of fuel cell Rate Δ PP_max；When load demand power reduces, fuel cell power output changing value reversely fluctuates less than fuel cell Power Δ PN_max。
To coordinate the realization of the inventive method, based on identical inventive concept, as shown in figure 3, present invention also offers one Kind realizes the control system in fuel cell array optimum efficiency section, including fuel cell array system 100, power-generating control system 200 and load 300；The power output end of the fuel cell array system 100 is connected to the power input of load 300, institute Power-generating control system 200 is stated to be respectively connecting on the inlet wire of fuel cell array system 100 and load 300；
The fuel cell array system 100 includes multiple fuel cell arrays 001 and 002 being serially connected, the combustion Expect that battery array includes multiple fuel cells and the converter with fuel cell cascade, each converter is parallel with one another；
The power-generating control system 200 includes fuel cell array generation control unit 004 and for acquisition system voltage The acquisition and conditioning circuit 003 of current signal, gather the fuel electricity of each fuel cell output in fuel cell array 001 and 002 Cell voltage and fuel cell current, the converter voltage and converter of collection and the output of the converter of each fuel cell cascade Electric current, the load voltage and load current of the input of collection load 300, and transmit a signal to fuel cell array Generation Control list Member 004；The fuel cell array generation control unit 004 is additionally coupled to each converter.
The voltage and current signal that power-generating control system 200 is fed back by handling acquisition and conditioning circuit 003, analysis fuel electricity Pond service behaviour；When some cell operation performance has declined in array, its working condition can be changed or cut off the fuel Battery, vacancy part are supplemented by remaining element, effectively improve the stability of a system.
As the prioritization scheme of the embodiment above, the fuel cell array generation control unit 004 is controlled including FPGA Device, A/D convertor circuit and pwm control circuit processed, the FPGA controller connect A/D convertor circuit and pwm control circuit respectively, institute A/D convertor circuit connection acquisition and conditioning circuit 003 is stated, the pwm control circuit is connected to each converter.
The voltage and current signal that the present invention need to gather is more, using more than FPGA controller Peripheral Interface quantity and can be any The advantages of configuration；After the acquired modulate circuit 003 of big voltage and current is conditioned, FPGA controls are collected by A/D convertor circuit In device, using its calculating speed it is fast the advantages of, data after control algolithm is handled pwm control circuit start working, control conversion Device, realize the purpose of control fuel cell power generation.
As the prioritization scheme of the embodiment above, the fuel cell array electricity generation system includes two fuel cell array Row 001 and 002, each fuel cell array 001 and 002 include four fuel cells, are both provided with each fuel cell Respective converter.
The converter is the straight Boost of crisscross parallel topological structure.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (10)

1. a kind of control method for realizing fuel cell array optimum efficiency section, it is characterised in that including step：
The fuel battery voltage and fuel cell current of each fuel cell output in S100 collection fuel cell arrays, collection with The converter voltage and converter current of the converter output of each fuel cell cascade, the load voltage of collection load input and Load current；
S200 is by fuel battery voltage, fuel cell current, load voltage, load current, converter voltage and converter current Data are carried out to be fitted to obtain fuel cell efficiency current curve and fuel battery power current curve；
S300 fuel cell efficiency current curves, setting fuel cell maximum power electric current IP_max, fuel cell maximum work Rate PFC_maxWith fuel cell maximum power voltage VP_maxValue；Fuel cell power current curve, setting fuel cell is most Big efficiency current IE_maxWith fuel cell maximal efficiency powerValue；Fuel cell maximal efficiency electric current IE_max Set fuel cell maximal efficiency fluctuating current Δ IEValue；Fuel cell maximal efficiency powerSet fuel electricity Pond maximal efficiency fluctuating power Δ PEValue；Value set by above need to meet restrictive condition：IE_max+ΔIE-IP_max＜ IP_max* 2% He
According to system requirements, initialization system busbar voltage VbusWith loading demand peak power Pload_max, wherein loading demand is maximum Power meets
Fuel cell characteristic, setting fuel cell maximum forward fluctuating power Δ PP_maxFluctuated with fuel cell maximum reverse Power Δ PN_maxValue；
S400 fuel cell peak powers PFC_max, fuel cell maximal efficiency powerWith fuel cell maximal efficiency Fluctuating power Δ PEDivide bearing power PloadScope；In the different range divided, fuel cell peak power electricity Flow IP_max, fuel cell maximum power voltage VP_max, fuel cell maximal efficiency electric current IE_max, fuel cell maximal efficiency ripple Streaming current Δ IE, fuel cell maximum forward fluctuating power Δ PP_max, fuel cell maximum reverse fluctuating power Δ PN_max, system Operating voltage VbusAnd/or loading demand peak power Pload_max, determine each fuel cell cascade in each fuel cell array The operating mode of converter, so as to control the output state of fuel cell array.
2. a kind of control method for realizing fuel cell array optimum efficiency section according to claim 1, its feature exist In the step S400 includes step：
S410 sets No. 5 conversion of No. 1 converter cascaded with No. 1 fuel cell and setting and No. 5 fuel cells cascades first The output voltage of device is constant to be
S420 detection bearing powers Pload：
(1) whenStart No. 1 fuel cell and No. 5 fuel cells divide bearing power equally；
(2) whenWhen, according to No. 1 fuel cell and the voltage of No. 5 fuel cells, really The operating mode of fixed No. 1 fuel cell and No. 5 fuel cells；
(3) whenWhen, start No. 2 fuel cells and No. 6 fuel cell supplement vacancy work( Rate；No. 1 fuel cell and No. 5 fuel cells are constant with electric current I simultaneouslyE_max-ΔIEOutput；
(4) whenWhen, start No. 1 fuel cell, No. 2 fuel cells, No. 5 Fuel cell and No. 6 fuel cells and with electric currentConstant output；
(5) whenWhen, according to No. 1 fuel cell and the voltage of No. 2 fuel cells, with And the voltage of No. 5 fuel cells and No. 6 fuel cells；Determine No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, No. 5 The operating mode of fuel cell, No. 6 fuel cells and No. 7 fuel cells；
(6) 4P is worked asFC_max＜ Pload≤6PFC_maxWhen, start No. 3 fuel cells and No. 7 fuel cell supplement vacancy power；
(7) 6P is worked asFC_max＜ Pload≤Pload_maxWhen, start No. 4 fuel cells and No. 8 fuel cell supplement vacancy power.
3. a kind of control method for realizing fuel cell array optimum efficiency section according to claim 2, its feature exist In step (2) includes：
(21) if the voltage of only No. 1 fuel cell is less than fuel cell maximum power voltage VP_max, start No. 2 fuel cells and mend Fill vacancy power；And constant No. 1 fuel cell is with electric current IE_max-ΔIEOutput, No. 5 fuel cells are with fuel cell maximum power Electric current IP_maxConstant output；
(22) if the voltage of only No. 5 fuel cells is less than fuel cell maximum power voltage VP_max, start No. 6 fuel cells and mend Fill vacancy power；Constant No. 5 fuel cells are with electric current IE_max-ΔIEOutput, No. 1 fuel cell is with fuel cell maximum power electricity Flow IP_maxConstant output；
(23) if the voltage of No. 1 fuel cell and No. 5 fuel cells is respectively less than fuel cell maximum power voltage VP_max, start 2 Number fuel cell and No. 6 fuel cells supplement vacancy power；Constant No. 1 fuel cell and No. 5 fuel cells are with electric current IE_max- ΔIEOutput；
(24) if above state is unsatisfactory for, constant No. 1 fuel cell and No. 5 fuel cells are with fuel cell maximum power electric current IP_maxOutput；
In addition, when load demand power increase, fuel cell power output changing value is less than the positive fluctuation of fuel cell Power Δ PP_max；When load demand power reduces, fuel cell power output changing value is less than fuel cell backward-wave Dynamic power Δ PN_max。
4. a kind of control method for realizing fuel cell array optimum efficiency section according to claim 3, its feature exist In step (5) includes：
(51) if the voltage of No. 1 fuel cell and No. 2 fuel cells is equal to fuel cell maximum power voltage VP_max, constant 1 Number fuel cell and No. 2 fuel cells are with fuel cell maximum power electric current IP_maxOutput；
(52) if the voltage of any one is less than fuel cell maximum power voltage in No. 1 fuel cell and No. 2 fuel cells VP_max；Start No. 3 fuel cell replenishment system vacancy power, wherein whenWhen, constant No. 1 and No. 2 Fuel cell is with electric current IE_max-ΔIEOutput；WhenWhen, No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with electric currentIt is constant defeated Go out；
(53) if the voltage of No. 5 fuel cells and No. 6 fuel cells is equal to fuel cell maximum power voltage VP_max, constant 5 Number and No. 6 fuel cells with fuel cell maximum power electric current IP_maxOutput；
(54) if any one voltage is less than fuel cell maximum power voltage V in No. 5 fuel cells and No. 6 fuel cellsP_max, Start No. 7 fuel cell supplement vacancy power；WhenWhen, constant No. 5 and No. 6 fuel cells are with electricity Flow IE_max-ΔIEOutput；WhenWhen, No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells With electric currentConstant output；
Wherein, when load demand power increase, fuel cell power output changing value is less than the positive fluctuation of fuel cell Power Δ PP_max；When load demand power reduces, fuel cell power output changing value is less than fuel cell backward-wave Dynamic power Δ PN_max。
5. a kind of control method for realizing fuel cell array optimum efficiency section according to claim 4, its feature exist In step (6) includes：
JudgeWhether set up；
If so, whenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 5 fuel cells and No. 6 combustions Expect battery with electric current IE_max-ΔIEConstant output；WhenWhen, No. 1 combustion Expect battery, No. 2 fuel cells, No. 3 fuel cells, No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells with electric currentConstant output；WhenWhen, point Following four situation：1. if the voltage of No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells is equal to fuel cell maximum Power voltage VP_max, constant No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with fuel cell maximum power electric current IP_maxOutput；2. if the voltage of any one is less than fuel cell in No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells Peak power voltage VP_max, start No. 4 fuel cell replenishment system vacancy power；WhenWhen, it is permanent Fixed No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells and No. 4 fuel cells are equal With electric currentOutput；If 3. No. 5 fuel electricity The voltage in pond, No. 6 fuel cells and No. 7 fuel cells is equal to fuel cell maximum power voltage VP_max, constant No. 5 fuel electricity Pond, No. 6 fuel cells and No. 7 fuel cells are with fuel cell maximum power electric current IP_maxOutput；If 4. No. 5 fuel cells, No. 6 The voltage of any one is less than fuel cell maximum power voltage V in fuel cell and No. 7 fuel cellsP_max, start No. 8 fuel Battery replenishment system vacancy power；WhenWhen, constant No. 5 fuel cells, No. 6 fuel cells and No. 7 Fuel cell is with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 5 fuel cells, No. 6 fuel Battery, No. 7 fuel cells and No. 8 fuel cells are with electric currentOutput.
IfIt is invalid：WhenWhen, No. 1 fuel cell, No. 2 combustions Expect battery, No. 3 fuel cells, No. 5 fuel cells, No. 6 fuel cells and No. 7 fuel cells with electric currentConstant output；WhenWhen, Divide following four situation：1. if the voltage of No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells is equal to fuel cell most High-power voltage VP_max, constant No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with fuel cell maximum power electric current IP_maxOutput；2. if the voltage of any one is less than fuel cell in No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells Peak power voltage VP_max, start No. 4 fuel cell replenishment system vacancy power；WhenWhen, it is permanent Fixed No. 1 fuel cell, No. 2 fuel cells and No. 3 fuel cells are with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells and No. 4 fuel cells are equal With electric currentOutput；If 3. No. 5 fuel electricity The voltage in pond, No. 6 fuel cells and No. 7 fuel cells is equal to fuel cell maximum power voltage VP_max, constant No. 5 fuel electricity Pond, No. 6 fuel cells and No. 7 fuel cells are with fuel cell maximum power electric current IP_maxOutput；If 4. No. 5 fuel cells, No. 6 The voltage of any one is less than fuel cell maximum power voltage V in fuel cell and No. 7 fuel cellsP_max, start No. 8 fuel Battery replenishment system vacancy power；WhenWhen, constant No. 5 fuel cells, No. 6 fuel cells and No. 7 combustions Expect battery with electric current IE_max-ΔIEOutput；WhenWhen, constant No. 5 fuel cells, No. 6 fuel cells, No. 7 fuel cells and No. 8 fuel cells are with electric current Output；
When load demand power increase, fuel cell power output changing value is less than fuel cell forward direction fluctuating power Δ PP_max；When load demand power reduces, fuel cell power output changing value is less than the reverse fluctuating power of fuel cell ΔPN_max。
6. a kind of control method for realizing fuel cell array optimum efficiency section according to claim 4, its feature exist In step (7) includes：
JudgeWhether set up；
If set up：WhenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, No. 5 fuel Battery, No. 6 fuel cells and No. 7 fuel cells are with electric current IE_max-ΔIEConstant output；WhenWhen, No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, No. 4 fuel electricity Pond, No. 5 fuel cells, No. 6 fuel cells, No. 7 fuel cells and No. 8 fuel cells are with electric currentConstant output；
IfIt is invalid：No. 1 fuel cell, No. 2 fuel cells, No. 3 fuel cells, No. 4 combustions Expect battery, No. 5 fuel cells, No. 6 fuel cells, No. 7 fuel cells and No. 8 fuel cells with electric currentConstant output；
When load demand power increase, fuel cell power output changing value is less than fuel cell forward direction fluctuating power Δ PP_max；When load demand power reduces, fuel cell power output changing value is less than the reverse fluctuating power of fuel cell ΔPN_max。
7. a kind of control system for realizing fuel cell array optimum efficiency section, it is characterised in that including fuel cell array System (100), power-generating control system (200) and load (300)；The power output end of the fuel cell array system (100) The power input of load (300) is connected to, the power-generating control system (200) is respectively connecting to fuel cell array system (100) and on the inlet wire of load (300)；
The fuel cell array system (100) includes multiple fuel cell arrays (001) (002) being serially connected, the combustion Expect that battery array includes multiple fuel cells and the converter with fuel cell cascade, each converter is parallel with one another；
The power-generating control system (200) includes fuel cell array generation control unit (004) and for acquisition system voltage The acquisition and conditioning circuit (003) of current signal, gather the combustion of each fuel cell output in fuel cell array (001) (002) Expect cell voltage and fuel cell current, converter voltage and conversion of the collection with the converter output of each fuel cell cascade Device electric current, the load voltage and load current of collection load (300) input, and transmit a signal to fuel cell array generating control Unit (004) processed；The fuel cell array generation control unit (004) is additionally coupled to each converter.
8. a kind of control system for realizing fuel cell array optimum efficiency section according to claim 7, its feature exist In the fuel cell array generation control unit (004) includes FPGA controller, A/D convertor circuit and pwm control circuit, institute State FPGA controller and connect A/D convertor circuit and pwm control circuit respectively, the A/D convertor circuit connects acquisition and conditioning circuit (003), the pwm control circuit is connected to each converter.
9. a kind of control system for realizing fuel cell array optimum efficiency section according to claim 8, its feature exist In the fuel cell array electricity generation system includes two fuel cell arrays (001) (002), each fuel cell array (001) (002) includes four fuel cells, and respective converter is both provided with each fuel cell.
10. a kind of control system for realizing fuel cell array optimum efficiency section according to claim 9, its feature exist In the converter is the straight Boost of crisscross parallel topological structure.
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