CN109119983A - A kind of electricity-hydrogen isolated island direct-current grid energy management method - Google Patents
A kind of electricity-hydrogen isolated island direct-current grid energy management method Download PDFInfo
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- CN109119983A CN109119983A CN201811098021.6A CN201811098021A CN109119983A CN 109119983 A CN109119983 A CN 109119983A CN 201811098021 A CN201811098021 A CN 201811098021A CN 109119983 A CN109119983 A CN 109119983A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
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Abstract
The present invention discloses a kind of electricity-hydrogen isolated island direct-current grid energy management method, measures current time electricity-hydrogen isolated island DC micro-electric net state；Optimal output power reference value by the top layer of hierarchical control according to measurement data based on system economy and stable calculation current time each energy-storage system；Each system output power is adjusted according to value and power reference by the bottom of hierarchical control, controls the operating mode of battery system, fuel cell system, electrolyzer system and hydrogen storage can system, completes the energy management of isolated island direct-current grid.The present invention can guarantee that system use cost is minimum on the basis of guaranteeing micro-grid system voltage stabilization, power-balance, can guarantee that the energy storage state of energy-storage travelling wave tube keeps balance, improve the stability and economy of micro-capacitance sensor operation.
Description
Technical field
The invention belongs to direct-current grid technical fields, more particularly to a kind of electricity-hydrogen isolated island direct-current grid energy pipe
Reason method.
Background technique
With the increasingly development of micro-capacitance sensor technology, energy-storage system gradually diversification in micro-capacitance sensor, electric energy storage and hydrogen energy storage with
The operation control of micro-capacitance sensor, which generates, to be closely connected.It with the building up of project, demonstrates, pushes the new energy such as distributed energy, energy storage
Development, will also carry out beneficial exploration to providing multiple forms of energy to complement each other, and micro-capacitance sensor is pushed to play a significant role in energy services.Micro-capacitance sensor
It generates electricity since its green, environmental protection and generated energy have many advantages, such as compared to conventional Power Generation Mode greatly, but due to being distributed in micro-capacitance sensor
The strong randomness and fluctuation of the formula energy need energy-storage system that system is further maintained to stablize, and on the one hand prevent from abandoning light, abandonment
Etc. waste of resource the phenomenon that, on the other hand also the power shortage of system is supplemented, plays and is by rigid transition by power grid
Effect flexible.The microgrid energy management containing energy-storage system is studied, the power quality of micro-capacitance sensor has been can be improved, has promoted system
The operational efficiency of system increases the service life of system, has graduallyd mature to distributed energy development and energy Internet technology
Important meaning.
Existing energy management method for micro-grid is mainly the state machine energy management method based on energy storage state, this method
If control is divided into dry model according to energy-storage system energy storage state, the distributing that also with good grounds each micro- source characteristic carries out is sagging
Control method.But existing method is more single for the energy management mode of micro-capacitance sensor, and does not carry out to system many index
It is unified to consider, cause system effectiveness lower, and energy storage state is bad.
Summary of the invention
To solve the above-mentioned problems, the invention proposes a kind of electricity-hydrogen isolated island direct-current grid energy management method,
It is more to using electricity-hydrogen hybrid energy-storing consumption photovoltaic to generate on the basis of guaranteeing micro-grid system voltage stabilization, power-balance
Remaining electric energy and release energy for the scenes such as power shortage carry out minimize energy-storage system use cost and maintain energy-storage system
The stable optimal control of energy storage state can guarantee that system use cost is minimum, can guarantee that the energy storage state of energy-storage travelling wave tube is protected
Maintain an equal level weighing apparatus, improves the stability and economy of micro-capacitance sensor operation.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of electricity-hydrogen isolated island direct-current grid energy pipe
Reason method, electricity-hydrogen isolated island direct-current grid include photovoltaic generating system, fuel cell system, electrolyzer system, hydrogen container system
System, battery system and control centre, the photovoltaic generating system, fuel cell system, electrolyzer system and battery system
System is connected to DC bus, and the electrolyzer system is connected to fuel cell system, control centre pair by hydrogen storage can system
Each system mode is detected, and carries out energy management to each system by hierarchical control；The photovoltaic power generation array is micro-
The energy supplying system of power grid, the battery system are the electric energy-storage system of micro-capacitance sensor, the electrolyzer system, hydrogen storage can system
And fuel cell system is the hydrogen energy-storage system of micro-capacitance sensor；
For the electricity-hydrogen isolated island direct-current grid energy management method comprising steps of
S100 initializes each system；
S200 measures current time electricity-hydrogen isolated island DC micro-electric net state, obtains measurement data；
S300, when being based on system economy and current stable calculation according to measurement data by the top layer of hierarchical control
Carve the optimal output power reference value of each energy-storage system；
S400 is adjusted each system output power according to value and power reference by the bottom of hierarchical control, control
Battery system, fuel cell system, electrolyzer system and hydrogen storage can system operating mode, complete isolated island direct-current grid
Energy management.
Further, being worked as system power mobility status under clear current state by control centre's measurement
Preceding moment user side demand power PLOADAnd photovoltaic array system side output power PPV, calculate current DC bus demand function
Rate Pbus；And measure each energy-storage system state.
Further, the hierarchical control of the control centre includes top layer energy management layer and bottom physical layer；It is described
Top layer carries out Optimal calculation to the information that bottom transmits, and transmits calculated result to bottom；The bottom is micro- in each system
The physical structure layer of source and current transformer, according to top layer calculated result and referring to each system limit and constrain to each system export into
Row control operation；The top layer and bottom are communicated by ICP/IP protocol.
Further, economy and energy storage state stability in order to guarantee system, in the step S300, institute
Stating top layer energy management layer includes system economy and energy storage state stability algorithm；The system economy and energy storage state
Stability algorithm, with electric energy-storage system output power PbatAnd hydrogen energy-storage system output power PhyMake control variable u, v respectively,
With battery system soc and hydrogen storage can system hydrogen storage content sohcDo state variable；In operating condition PbusMiddle distribution fuel cell system,
Power distribution is carried out between battery system and electrolyzer system, so that electric energy-storage system and hydrogen energy-storage system are integrally used into
This is minimum at current time, while making battery system soc and hydrogen storage can system sohcIt maintains in restriction range.
Further, the system economy and energy storage state stability algorithm, obtain currently from measuring system first
Moment needs each data value measured, input control center；Secondly, consuming min algorithm calculating accumulator power based on equivalent hydrogen
Penalty is exported, according to calculating hydrogen energy-storage system power output penalty；Again, according to the bus demand power of input
And penalty, each energy-storage units reference power is calculated based on energy-storage system use cost minimum principle, finally by reference power
Signal is transferred to next layer by communication apparatus.
Further, the system economy and energy storage state stability algorithm, comprising steps of
S301, in current system power demand PbusUnder, the system economy and energy storage state stability function are as follows:
Cst(Cbat,Chy,soc,sohc)=min (λ (soc) Cbat+f(sohc)Chy)；
Wherein, CbatWith ChyRespectively battery system and hydrogen energy-storage system use cost, λ (soc) are about battery
The penalty of soc, f (sohc) it is about hydrogen container sohcPenalty；
The sohcFor the equivalent state-of-charge of hydrogen container, indicate are as follows: sohc=Psto/PN；Wherein, PstoFor current tank internal pressure
By force, PNFor the maximum allowable pressure of hydrogen container；
S302, for the systematic economy system and energy storage state stability function, procurement cost function:
The cost function that the electricity energy-storage system uses are as follows:
Wherein, Cbat,cFor battery acquisition cost, LbatFor service lifetime of accumulator, Cbat,O&MFor battery operation, dimension
Protect cost, ηbat,chEfficiency to charge the battery, ηbat,disFor battery discharging efficiency；
Since the life of storage battery is provided with charge and discharge cycles number, then life of storage battery LbatIt is shown as:
Wherein, n is battery group number, and C is accumulator capacity, UNFor battery voltage rating, NclFor battery circulation time
Number, PbatFor battery output power；
The cost function that the hydrogen energy-storage system uses are as follows:
Wherein, Cel, c is electrolytic cell acquisition cost, Cfc, c is fuel cell acquisition cost, Cel,O&MRun for electrolytic cell,
Maintenance cost, Cfc,O&MFor fuel cell operation, maintenance cost, ηfcFor fuel cell efficiency, ηelFor cell efficiency；
S303 obtains penalty for the systematic economy system and energy storage state stability function:
The electric energy-storage system penalty of battery soc are as follows:
Wherein, e1For correction factor, Pbatopt(soc) optimal output power is consumed for the equivalent hydrogen of battery about soc,
Pch,maxFor battery maximum charge power, Pdis,maxFor battery maximum discharge power；
Hydrogen container sohcHydrogen energy-storage system penalty are as follows:
Wherein, e2For correction factor, sohcrefOptimal reserves are referred to for hydrogen container；
S304 is asked according to the systematic economy system and energy storage state stability function, cost function and penalty
Take optimal solution.
Further, the method for seeking optimal solution, comprising steps of
S3041, according to system current soc and sohcValue calculates penalty；
S3042, according to current micro-capacitance sensor demand power Pbus, battery maximum charge power and battery maximum discharge function
Rate solves battery from the cost collection C without output to maximum valuebat[0,Pmax] and corresponding power under hydrogen energy-storage system cost Chy
[0,Pbus-Pmax]；
The cost obtained under the output of each system power is compared, it is minimum to obtain system total operating cost by S3043
Value, taking-up correspond to battery output power P under system total operating cost minimum valuebatAnd hydrogen energy-storage system power Phy；
S3044 transmits the optimal solution for calculating output to next layer.
Further, the bottom physical layer is current transformer and controller and fuel cell, electrolysis in each system
The control structure that slot, battery, photovoltaic array and hydrogen container are constituted；
The photovoltaic generating system is controlled using MPPT maximum power point tracking；The fuel cell system and electrolyzer system
Using electric current monocycle PID control；The battery system uses sagging control.
Further, the normal operation in order to guarantee system, should establish corresponding constraint item based on system self-characteristic
Part, the system limitation and constraint include: fuel cell peak power output, electrolytic cell peak power output, battery maximum
Charge-discharge electric power, fuel cell response time, electrolytic cell response time, hydrogen container sohcBound and battery soc or more
Limit；
If it is more than limitation that upper layer, which requires output power, lower layer's control output power is maintained within limit value；If hydrogen container
sohcHigher than the upper limit, then lower layer does not start electrolytic cell, if hydrogen container sohcLower than lower limit, then lower layer's not starting fluid battery；If
Battery soc surmounts limit value, then not starting storage battery.
Further, the fuel cell system includes proton membrane exchange fuel cell interconnected and unidirectional DC/
DC current transformer；The electrolyzer system includes electrolytic cell interconnected and unidirectional DC/DC current transformer；The battery system
Including battery interconnected and two-way DC/DC current transformer；The photovoltaic generating system includes photovoltaic cell interconnected
With unidirectional DC/DC current transformer group；The control centre includes the soh for measuring component measurement busbar voltage, hydrogen energy-storage systemcValue
And the soc value of electric energy-storage system；The control centre connect with the current transformer of each system and to each system converter input control
Signal.
Using the technical program the utility model has the advantages that
The present invention is on the basis of guaranteeing micro-grid system voltage stabilization, power-balance, to using electricity-hydrogen hybrid energy-storing
Consumption photovoltaic generate extra electric energy and release energy for the scenes such as power shortage carry out minimize energy-storage system use at
Sheet and the optimal control for maintaining energy-storage system energy storage state stable can guarantee that system use cost is minimum, can guarantee energy storage
The energy storage state of element keeps balance, improves the stability and economy of micro-capacitance sensor operation.
The present invention issues extra electric energy for absorbing above-mentioned photovoltaic array system, while exporting in photovoltaic array system
Additional electrical energy is provided when insufficient；It can guarantee that system is safe and reliable, while reduce the energy loss of system, lifting system operation
Economy；Each system is calculated according to the integrated demand power of system and current energy-storage system energy storage state, top controller
Reference power, bottom controller controls the reference power that provides according to top layer, controls each system, to effectively drop
The use cost of low energy-storage system, while each energy-storage system energy storage state being maintained to stablize, improve the whole efficiency of system.
The present invention is by using two-stage tiered management approach, according to current system demand power, to system use cost and
Energy storage state carries out comprehensive consideration, and the overall operation state of decision systems, so that control centre is more flexible, reliable；It realizes
The combination of the economy operation and stable operation of micro-capacitance sensor；Can guarantee each system operation of micro-capacitance sensor under high efficiency mode,
To improve the capacity usage ratio of system, avoid abandoning light.
Detailed description of the invention
Fig. 1 is a kind of electricity of the invention-hydrogen isolated island direct-current grid energy management method flow diagram；
Fig. 2 is system economy and the schematic diagram of calculation flow of energy storage state stability function in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram that a kind of electricity of the invention-hydrogen isolated island direct-current grid is layered Energy Management System；
Fig. 4 is electricity-hydrogen isolated island DC micro power grid system topological structure in the embodiment of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made into one with reference to the accompanying drawing
Step illustrates.
In the present embodiment, shown in Figure 1, the invention proposes a kind of electricity-hydrogen isolated island direct-current grid energy managements
Method, electricity-hydrogen isolated island direct-current grid include photovoltaic generating system, fuel cell system, electrolyzer system, hydrogen storage can system,
Battery system and control centre, the photovoltaic generating system, fuel cell system, electrolyzer system and battery system
It is connected to DC bus, the electrolyzer system is connected to fuel cell system by hydrogen storage can system, and control centre is to each
A system mode is detected, and carries out energy management to each system by hierarchical control；The photovoltaic power generation array is micro- electricity
The energy supplying system of net, the battery system be micro-capacitance sensor electric energy-storage system, the electrolyzer system, hydrogen storage can system with
And fuel cell system is the hydrogen energy-storage system of micro-capacitance sensor；
For the electricity-hydrogen isolated island direct-current grid energy management method comprising steps of
S100 initializes each system；
S200 measures current time electricity-hydrogen isolated island DC micro-electric net state, obtains measurement data；
Current time user side demand power P is measured by the control centreLOADAnd photovoltaic array system side output
Power PPV, calculate current DC bus demand power Pbus；And measure each energy-storage system state；
S300, when being based on system economy and current stable calculation according to measurement data by the top layer of hierarchical control
Carve the optimal output power reference value of each energy-storage system；
S400 is adjusted each system output power according to value and power reference by the bottom of hierarchical control, control
Battery system, fuel cell system, electrolyzer system and hydrogen storage can system operating mode, complete isolated island direct-current grid
Energy management.
As the prioritization scheme of above-described embodiment, for system power mobility status under clear current state, the control
The hierarchical control at center includes top layer energy management layer and bottom physical layer；The top layer carries out most the information that bottom transmits
Excellent calculating, and calculated result is transmitted to bottom；The bottom is the physical structure layer of micro- source and current transformer in each system, root
It limits and constrains according to top layer calculated result and referring to each system and control operation is carried out to the output of each system；The top layer and bottom
It is communicated by ICP/IP protocol.
As the prioritization scheme of above-described embodiment, in order to guarantee the economy and energy storage state stability of system, described
In step S300, the top layer energy management layer includes system economy and energy storage state stability algorithm；The systematic economy
Property and energy storage state stability algorithm, with electric energy-storage system output power PbatAnd hydrogen energy-storage system output power PhyMake respectively
Variable u, v are controlled, with battery system soc and hydrogen storage can system hydrogen storage content sohcDo state variable；In operating condition PbusMiddle distribution
Power distribution is carried out between fuel cell system, battery system and electrolyzer system, so that electric energy-storage system and hydrogen energy storage system
Whole use cost of uniting is minimum at current time, while making battery system soc and hydrogen storage can system sohcIt maintains
In restriction range.
As shown in Fig. 2, the system economy and energy storage state stability algorithm, obtain currently from measuring system first
Moment needs each data value measured, input control center；Secondly, consuming min algorithm based on equivalent hydrogen according to obtained system
Calculating accumulator power output penalty, according to calculating hydrogen energy-storage system power output penalty；Again, according to input
Bus demand power and penalty, each energy-storage units reference power is calculated based on energy-storage system use cost minimum principle,
Reference power signal is finally transferred to next layer by communication apparatus.
Specifically include step:
S301, in current system power demand PbusUnder, the system economy and energy storage state stability function are as follows:
Cst(Cbat,Chy,soc,sohc)=min (λ (soc) Cbat+f(sohc)Chy)；
Wherein, CbatWith ChyRespectively battery system and hydrogen energy-storage system use cost, λ (soc) are about battery
The penalty of soc, f (sohc) it is about hydrogen container sohcPenalty；
The sohcFor the equivalent state-of-charge of hydrogen container, indicate are as follows: sohc=Psto/PN；Wherein, PstoFor current tank internal pressure
By force, PNFor the maximum allowable pressure of hydrogen container；
S302, for the systematic economy system and energy storage state stability function, procurement cost function:
The cost function that the electricity energy-storage system uses are as follows:
Wherein, Cbat,cFor battery acquisition cost, LbatFor service lifetime of accumulator, Cbat,O&MFor battery operation, dimension
Protect cost, ηbat,chEfficiency to charge the battery, ηbat,disFor battery discharging efficiency；
Since the life of storage battery is provided with charge and discharge cycles number, then life of storage battery LbatIt is shown as:
Wherein, n is battery group number, and C is accumulator capacity, UNFor battery voltage rating, NclFor battery circulation time
Number, PbatFor battery output power；
The cost function that the hydrogen energy-storage system uses are as follows:
Wherein, Cel, c is electrolytic cell acquisition cost, Cfc, c is fuel cell acquisition cost, Cel,O&MRun for electrolytic cell,
Maintenance cost, Cfc,O&MFor fuel cell operation, maintenance cost, ηfcFor fuel cell efficiency, ηelFor cell efficiency；
S303 obtains penalty for the systematic economy system and energy storage state stability function:
The electric energy-storage system penalty of battery soc are as follows:
Wherein, e1For correction factor, Pbatopt(soc) optimal output power is consumed for the equivalent hydrogen of battery about soc,
Pch,maxFor battery maximum charge power, Pdis,maxFor battery maximum discharge power；
Hydrogen container sohcHydrogen energy-storage system penalty are as follows:
Wherein, e2For correction factor, sohcrefOptimal reserves are referred to for hydrogen container；
S304 is asked according to the systematic economy system and energy storage state stability function, cost function and penalty
Take optimal solution.
The method for seeking optimal solution, comprising steps of
S3041, according to system current soc and sohcValue calculates penalty；
S3042, according to current micro-capacitance sensor demand power Pbus, battery maximum charge power and battery maximum discharge function
Rate solves battery from the cost collection C without output to maximum valuebat[0,Pmax] and corresponding power under hydrogen energy-storage system cost Chy
[0,Pbus-Pmax]；
The cost obtained under the output of each system power is compared, it is minimum to obtain system total operating cost by S3043
Value, taking-up correspond to battery output power P under system total operating cost minimum valuebatAnd hydrogen energy-storage system power Phy；
S3044 transmits the optimal solution for calculating output to next layer.
As the prioritization scheme of above-described embodiment, as shown in figure 3, the bottom physical layer is current transformer in each system
And the control structure that controller and fuel cell, electrolytic cell, battery, photovoltaic array and hydrogen container are constituted；
The photovoltaic generating system is controlled using MPPT maximum power point tracking；The fuel cell system and electrolyzer system
Using electric current monocycle PID control；The battery system uses sagging control.
As the prioritization scheme of above-described embodiment, in order to guarantee the normal operation of system, system self-characteristic should be based on
Corresponding constraint condition is established, the system limitation and constraint include: fuel cell peak power output, electrolytic cell maximum output
Power, battery maximum charge-discharge electric power, fuel cell response time, electrolytic cell response time, hydrogen container sohc sohcUp and down
Limit and battery soc soc bound；
If it is more than limitation that upper layer, which requires output power, lower layer's control output power is maintained within limit value；If hydrogen container
sohcHigher than the upper limit, then lower layer does not start electrolytic cell, if hydrogen container sohcLower than lower limit, then lower layer's not starting fluid battery；If
Battery soc surmounts limit value, then not starting storage battery；
Energy-storage system limitation: for battery system, battery soc or more is limited to 90%, 20%, when battery soc is super
When 90%, stop to battery input energy, when battery soc is less than 20%, battery cannot export energy outward；
Similarly, to hydrogen container sohcBound 90%, 10% is set.
As the prioritization scheme of above-described embodiment, as shown in figure 4, the fuel cell system includes matter interconnected
Sub- film exchange fuel cell and unidirectional DC/DC current transformer；The electrolyzer system includes electrolytic cell interconnected and unidirectional
DC/DC current transformer；The battery system includes battery interconnected and two-way DC/DC current transformer；The photovoltaic power generation
System includes photovoltaic cell interconnected and unidirectional DC/DC current transformer group；The control centre includes that measurement component measurement is female
The soh of line voltage, hydrogen energy-storage systemcThe soc value of value and electric energy-storage system；The current transformer of the control centre and each system connects
It connects and to each system converter input control signal.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The skill of the industry
Art personnel it should be appreciated that the present invention is not limited to the above embodiments, the above embodiments and description only describe
The principle of the present invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, this
A little changes and improvements all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by the attached claims
Book and its equivalent thereof.
Claims (10)
1. a kind of electricity-hydrogen isolated island direct-current grid energy management method, which is characterized in that electricity-hydrogen isolated island direct-current grid includes
Photovoltaic generating system, fuel cell system, electrolyzer system, hydrogen storage can system, battery system and control centre, the light
Photovoltaic generating system, fuel cell system, electrolyzer system and battery system are connected to DC bus, the electrolyzer system
Fuel cell system is connected to by hydrogen storage can system；Each system mode detects in control centre, and passes through layering control
System carries out energy management to each system；The photovoltaic power generation array is the energy supplying system of micro-capacitance sensor, and the battery system is
The electric energy-storage system of micro-capacitance sensor, the electrolyzer system, hydrogen storage can system and fuel cell system are the hydrogen energy storage of micro-capacitance sensor
System；
For the electricity-hydrogen isolated island direct-current grid energy management method comprising steps of
S100 initializes each system；
S200 measures current time electricity-hydrogen isolated island DC micro-electric net state, obtains measurement data；
S300 is based on system economy according to measurement data by the top layer of hierarchical control and stable calculation current time respectively stores up
The optimal output power reference value of energy system；
S400 is adjusted each system output power according to value and power reference by the bottom of hierarchical control, controls electric power storage
Cell system, fuel cell system, electrolyzer system and hydrogen storage can system operating mode, complete the energy of isolated island direct-current grid
Management.
2. a kind of electricity according to claim 1-hydrogen isolated island direct-current grid energy management method, which is characterized in that pass through
The control centre measures current time user side demand power PLOADAnd photovoltaic array system side output power PPV, calculating works as
Preceding DC bus demand power Pbus；And measure each energy-storage system state.
3. a kind of electricity according to claim 2-hydrogen isolated island direct-current grid energy management method, which is characterized in that described
The hierarchical control of control centre includes top layer energy management layer and bottom physical layer；The top layer carries out the information that bottom transmits
Optimal calculation, and calculated result is transmitted to bottom；The bottom is the physical structure layer of micro- source and current transformer in each system, root
It limits and constrains according to top layer calculated result and referring to each system and control operation is carried out to the output of each system；The top layer and bottom are logical
ICP/IP protocol is crossed to be communicated.
4. a kind of electricity according to claim 3-hydrogen isolated island direct-current grid energy management method, which is characterized in that in institute
It states in step S300, the top layer energy management layer includes system economy and energy storage state stability algorithm；The system warp
Ji property and energy storage state stability algorithm, with electric energy-storage system output power PbatAnd hydrogen energy-storage system output power PhyRespectively
Make control variable u, v, with battery system soc and hydrogen storage can system hydrogen storage content sohcDo state variable；In operating condition PbusMiddle distribution
Power distribution is carried out between fuel cell system, battery system and electrolyzer system, so that electric energy-storage system and hydrogen energy storage system
Whole use cost of uniting is minimum at current time, while making battery system soc and hydrogen storage can system sohcIt maintains
In restriction range.
5. a kind of electricity according to claim 4-hydrogen isolated island direct-current grid energy management method, which is characterized in that described
System economy and energy storage state stability algorithm, first measurement obtain current time each data value, input control center；Its
It is secondary, min algorithm calculating accumulator power output penalty is consumed based on equivalent hydrogen, according to calculating hydrogen energy-storage system power output
Penalty；Again, according to the bus demand power and penalty of input, based on energy-storage system use cost minimum principle
Each energy-storage units reference power is calculated, reference power signal is finally transferred to next layer by communication apparatus.
6. a kind of electricity according to claim 5-hydrogen isolated island direct-current grid energy management method, which is characterized in that described
System economy and energy storage state stability algorithm, comprising steps of
S301, in current system power demand PbusUnder, the system economy and energy storage state stability function are as follows:
Cst(Cbat,Chy,soc,sohc)=min (λ (soc) Cbat+f(sohc)Chy)；
Wherein, CbatWith ChyRespectively battery system and hydrogen energy-storage system use cost, λ (soc) are about battery soc's
Penalty, f (sohc) it is about hydrogen container sohcPenalty；
The sohcFor the equivalent state-of-charge of hydrogen container, indicate are as follows: sohc=Psto/PN；Wherein, PstoFor pressure in current tank, PN
For the maximum allowable pressure of hydrogen container；
S302, for the systematic economy system and energy storage state stability function, procurement cost function:
The cost function that the electricity energy-storage system uses are as follows:
Wherein, Cbat,cFor battery acquisition cost, LbatFor service lifetime of accumulator, Cbat,O&MFor battery operation, safeguard at
This, ηbat,chEfficiency to charge the battery, ηbat,disFor battery discharging efficiency；
Since the life of storage battery is provided with charge and discharge cycles number, then life of storage battery LbatIt is shown as:
Wherein, n is battery group number, and C is accumulator capacity, UNFor battery voltage rating, NclFor battery cycle-index,
PbatFor battery output power；
The cost function that the hydrogen energy-storage system uses are as follows:
Wherein, Cel, c is electrolytic cell acquisition cost, Cfc, c is fuel cell acquisition cost, Cel,O&MFor electrolytic cell operation, safeguard at
This, Cfc,O&MFor fuel cell operation, maintenance cost, ηfcFor fuel cell efficiency, ηelFor cell efficiency；
S303 obtains penalty for the systematic economy system and energy storage state stability function:
The electric energy-storage system penalty of battery soc are as follows:
Wherein, e1For correction factor, Pbatopt(soc) optimal output power, P are consumed for the equivalent hydrogen of battery about socch,maxFor
Battery maximum charge power, Pdis,maxFor battery maximum discharge power；
Hydrogen container sohcHydrogen energy-storage system penalty are as follows:
Wherein, e2For correction factor, sohcrefOptimal reserves are referred to for hydrogen container；
S304 is sought optimal according to the systematic economy system and energy storage state stability function, cost function and penalty
Solution.
7. a kind of electricity according to claim 6-hydrogen isolated island direct-current grid energy management method, which is characterized in that described
The method for seeking optimal solution, comprising steps of
S3041, according to system current soc and sohcValue calculates penalty；
S3042, according to current micro-capacitance sensor demand power Pbus, battery maximum charge power and battery maximum discharge power, ask
Battery is solved from the cost collection C without output to maximum valuebat[0,Pmax] and corresponding power under hydrogen energy-storage system cost Chy[0,Pbus-
Pmax]；
The cost obtained under the output of each system power is compared, obtains system total operating cost minimum value, take by S3043
Battery output power P is corresponded under system total operating cost minimum value outbatAnd hydrogen energy-storage system power Phy；
S3044 transmits the optimal solution for calculating output to next layer.
8. a kind of electricity according to claim 7-hydrogen isolated island direct-current grid energy management method, which is characterized in that described
Bottom physical layer is current transformer and controller and fuel cell, electrolytic cell, battery, photovoltaic array and hydrogen storage in each system
The control structure that tank is constituted；
The photovoltaic generating system is controlled using MPPT maximum power point tracking；The fuel cell system and electrolyzer system are using electricity
Flow monocycle PID control；The battery system uses sagging control.
9. a kind of electricity according to claim 8-hydrogen isolated island direct-current grid energy management method, which is characterized in that described
System limitation and constraint include: fuel cell peak power output, electrolytic cell peak power output, battery maximum charge and discharge electric work
Rate, fuel cell response time, electrolytic cell response time, hydrogen container sohcBound and battery soc bound；
If it is more than limitation that upper layer, which requires output power, lower layer's control output power is maintained within limit value；If hydrogen container sohcIt is high
In the upper limit, then lower layer does not start electrolytic cell, if hydrogen container sohcLower than lower limit, then lower layer's not starting fluid battery；If battery
Soc surmounts limit value, then not starting storage battery.
10. a kind of any electricity-hydrogen isolated island direct-current grid energy management method, feature in -9 according to claim 1
It is, the fuel cell system includes proton membrane exchange fuel cell interconnected and unidirectional DC/DC current transformer；The electricity
Solving tank systems includes electrolytic cell interconnected and unidirectional DC/DC current transformer；The battery system includes storage interconnected
Battery and two-way DC/DC current transformer；The photovoltaic generating system includes photovoltaic cell interconnected and unidirectional DC/DC current transformer
Group；The control centre includes the soh for measuring component measurement busbar voltage, hydrogen energy-storage systemcThe soc of value and electric energy-storage system
Value；The control centre connect with the current transformer of each system and to each system converter input control signal.
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