CN106410840B - A kind of mixed energy storage system charge and discharge handoff procedure dynamically optimized control method - Google Patents
A kind of mixed energy storage system charge and discharge handoff procedure dynamically optimized control method Download PDFInfo
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
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Abstract
A kind of mixed energy storage system charge and discharge handoff procedure dynamically optimized control method, includes the following steps：Step 1: considering i-th of energy-storage units in mixed energy storage system, indicate that charge and discharge process, applied energy conservation theorem establish the dynamic mathematical models of the charge and discharge process of the energy-storage units with the variation of the remaining carrying capacity of energy-storage units；Step 2: considering the charge status of practical mixed energy storage system, shift design is carried out to mixed energy storage system charge and discharge process dynamic model；Step 3: considering super capacitor charge/discharge transformation model；Step 4: considering the constraint of mixed energy storage system carrying capacity and power input output constraint, mixed energy storage system charging process optimal control in dynamic device and discharge process optimal control in dynamic device are obtained.The present invention provides that a kind of thinking is simple, easy to use, the good mixed energy storage system charge and discharge handoff procedure dynamically optimized control method of practicability.
Description
Technical field
The present invention relates to a kind of mixed energy storage system charge and discharge handoff procedure dynamically optimized control methods.
Background technology
In current distributed power grid, the proportion of the regenerative resources such as wind energy, solar energy is increasing.Due to these energy
The output power of power supply in source is had intermittent and randomness by such environmental effects, to the peace of electric system after its being caused grid-connected
Full property and stability cause many adverse effects.Usually configuring a certain proportion of static var compensator to regenerative resource can be with
Its reactive power is quickly compensated, voltage stabilization at access power grid is maintained, and active power is compensated, is needed in regenerative resource
Mains side configures the energy-storage system of certain capacity.Pass through operation (the i.e. energy storage of optimal control energy-storage system and these energy power supplies
The power configuration of system), the power swing of renewable energy source current injection electric system is stabilized, its output power is made to meet electric power
The requirement of system safe and stable operation.Meanwhile to make energy-storage system have large capacity and high-power performance, generally use energy type
Energy-accumulating medium (such as accumulator) and power-type energy-accumulating medium (such as super capacitor) mixing composition energy-storage system.Wherein, energy type stores up
Can medium (such as accumulator) energy density is big, power density is small；On the contrary, the energy of power-type energy-accumulating medium (such as super capacitor)
Density is small, power density is big, and high magnification charge-discharge will not damage its performance.Therefore, in optimal control energy-storage system and these
In the operational process of energy power supply, need to provide effective Optimal Control Strategy to realize that energy-storage system is reasonable, effective charge and discharge
Electrical power configures.
By being found to the existing retrieval about mixed energy storage system charge and discharge switching control technical literature, according to difference
The complementary characteristic of energy-accumulating medium, it is proposed that super capacitor and accumulator hybrid energy-storing system, and theoretically demonstrate mixing storage
It can charge and discharge number of the system with higher power output capacity and reduction accumulator.It is real using automatic state machine control method
The hybrid energy-storing control of the electricity generation systems such as existing wind energy, solar energy, the how stagnant ring PID adjusting control strategies of use have studied and are suitable for
The accumulator and super capacitor mixed energy storage system of microgrid, the results showed that mixed energy storage system is frequently quick in coping with microgrid
There is good Technical Economy in terms of power and energy variation.Further, in the base of energy-accumulating medium discrete time mathematical model
On plinth, the energy-storage system of research power-type energy-accumulating medium composition realizes energy storage optimal control using fuzzy control strategy.These at
Fruit usually lays particular emphasis on thermal energy storage process Analysis on Mechanism, while cannot take explicitly into account various storages in energy storage power distribution controller design
Can the power input export-restriction of unit, minimum and maximum carrying capacity range and each energy-storage units charge and discharge process
Different electrical characteristics.
Invention content
In order to overcome the poor using complexity, practicability of existing mixed energy storage system charge and discharge handoff procedure control mode
Deficiency provide that a kind of thinking is simple, easy to use, practicability it is an object of the invention to overcome deficiency in the prior art
Good mixed energy storage system charge and discharge handoff procedure dynamically optimized control method, the co- controlling based on switching system
Lyapunov function tools, construct the switching state feedback controller of a parsing, and the parameter of wherein controller reflects mixing
The rate of energy-storage system charge and discharge considers further that the various restrictive conditions of mixed energy storage system and best charge-discharge performance function, root
According to the different charge and discharge process of each energy-storage units, dynamic optimization redesign is carried out to switch controller, makes mixed energy storage system
Charge and discharge process meet restrictive condition and best charge-discharge performance always, realize the charge and discharge handoff procedure of mixed energy storage system
Optimal control in dynamic.
In order to solve the above-mentioned technical problem technical solution that the present invention uses for：
A kind of mixed energy storage system charge and discharge handoff procedure dynamically optimized control method, includes the following steps：
Step 1: i-th of energy-storage units in mixed energy storage system are considered, with the variation of the remaining carrying capacity of energy-storage units
Indicate that charge and discharge process, applied energy conservation theorem establish the dynamic mathematical models of the charge and discharge process of the energy-storage units, see formula
(1) and (2)
Wherein, n indicates that the energy-storage units sum in mixed energy storage system, formula (1) indicate the charging of i-th of energy-storage units
Journey dynamic model, formula (2) indicate that the discharge process dynamic model of i-th of energy-storage units, t indicate the time of charge and discharge, unit
Min, QiIndicate the remaining carrying capacity of i-th of energy-storage units, unit MW, PiIndicate the charge-discharge electric power of i-th of energy-storage units, it is single
Position MW/min, σc,iIndicate the self-discharge rate of the charging process of i-th of energy-storage units, unit %/min, ηc,iIndicate i-th of energy storage
The charge efficiency of unit, unit %, σd,iIndicate the self-discharge rate of the discharge process of i-th of energy-storage units, unit %/min, ηd,i
Indicate the discharging efficiency of i-th of energy-storage units, unit %；
Step 2: the charge status of practical mixed energy storage system is considered, to mixed energy storage system charge and discharge process dynamic
Model carries out shift design, defined variable xi=QiAnd ui=Pi, wherein i=1 ..., n define the vector of mixed energy storage systemWithAccording to formula (1) and (2), the dynamic mathematics of the charge and discharge process of mixed energy storage system is defined respectively
Model is shown in formula (3) and (4)
Wherein, formula (3) indicates that the charging process dynamic model of mixed energy storage system, formula (4) indicate mixed energy storage system
Discharge process dynamic model, t indicate the time of charge and discharge, and unit min, x indicates the carrying capacity of energy storage device in energy-storage system, single
Position MW, u indicate charge-discharge electric power, unit MW/min)；
Step 3: considering super energy-storage units charge/discharge transformation modular form (3) and (4), matrix is defined
Inequation group is solved, sees formula (5)
Wherein P is known variables；The known variables P that formula (5) is solved using One- place 2-th Order inequation group, obtains formula
(5) solution is shown in formula (6)
Subscript n × n indicates that P is that the matrix of n rows n row measures the current carrying capacity x of mixed energy storage system in sampling instant t
(t), construction charging process input function uc(t), see formula (7)
With discharge process input function ud(t), see formula (8)
Wherein, With unknown parameter θ1、θ2、θ3With
θ4；
Step 4: considering the constraint of mixed energy storage system carrying capacity and power input output constraint, setup parameter θ1、θ2、θ3With
θ4Value range D, mixed energy storage system charging performance object function lc(x, u) is shown in formula (9)
With mixed energy storage system discharge performance object function ld(x, u) is shown in formula (10)
Wherein, xi,cIt is the charge target of i-th of energy-storage units, xi,dIt is the discharge target of i-th of energy-storage units, qc,iWith
qd,iIt is tuning parameter, i=1 ..., n are shown in mixed energy storage system charging process using univariate search technique solving-optimizing problem
Formula (11)
Obtain parameter optimal value θ1 *And θ2 *；To mixed energy storage system discharge process, asked using univariate search technique solving-optimizing
Topic, is shown in formula (12)
Obtain parameter optimal value θ3 *And θ4 *, wherein X indicates that mixed energy storage system carrying capacity restrict, U indicate mixing
The power input output constraint of energy-storage system charge and discharge process limits, and T indicates optimization time domain, Jc(x) it indicates in optimization time domain
Cumulative charging process performance function, Jd(x) the cumulative discharge process performance function in optimization time domain is indicated, by parameter optimal value
(θ1 *,θ2 *) and (θ3 *,θ4 *) formula (7) and formula (8) are substituted into respectively, obtain mixed energy storage system charging process optimal controller and electric discharge
Process optimization controller, after next sampling time reaches, iterative solution formula (11) and formula (12), obtain hybrid energy-storing system again
System charging process optimal control in dynamic device and discharge process optimal control in dynamic device.
Further, the dynamically optimized control method is further comprising the steps of：Step 5: in mixed energy storage system charge and discharge
It runs and implements on process switching control computer, be divided into 3 stages：
5.1 parameter settings, including model parameter and charge and discharge process target component are imported in model in interface, defeated respectively
Enter the self-discharge rate σ that each energy-storage units are charged and discharged processc,iAnd σd,i, unit %/min, charge efficiency ηc,i, electric discharge
Efficiency etad,i；It is arranged in interface in control parameter, inputs the initial carrying capacity of each energy-storage units, the value of unknown parameter respectively
Range D, the charge target x of energy-storage unitsi,c, the discharge target x of energy-storage unitsi,d, carrying capacity restrict X, power input is defeated
Go out restrict U, optimize time domain T, after input parameter confirms, data will be arranged by control computer and be sent into computer storage unit
It is preserved in RAM；
5.2 offline debugging, hybrid energy-storing charge-discharge control system enter the controller debugging stage, consider charging process respectively
And discharge process, adjustment configuration set adjustable parameter q in interfacec,iAnd qd,iValue, observe each energy storage of mixed energy storage system
The control effect of the charged and charge-discharge electric power of unit thereby determines that can well control a mixed energy storage system charge and discharge process
Controller parameter value, parameter qc,iAnd qd,iValue rule：qc,iAnd qd,iFor positive real number, i.e. qc,i＞ 0 and qd,i＞ 0, parameter
qc,iAnd qd,iAdjustment rule：Increase qc,iValue will shorten transit time of charging process, but increase the energy storage list of charging process
First carrying capacity variation and performance number, increase the sensibility disturbed to charging process, increase qd,iValue will shorten the mistake of discharge process
It crosses the time, but increases the variation of energy-storage units carrying capacity and the performance number of discharge process, increase the sensibility disturbed to discharge process；
On the contrary, reducing qc,iValue will extend transit time of charging process, but reduce charging process the variation of energy-storage units carrying capacity and
Performance number reduces the sensibility disturbed to charging process, reduces qd,iValue will extend transit time of discharge process, but reduce
The energy-storage units carrying capacity of discharge process changes and performance number, reduces the sensibility disturbed to discharge process.Therefore, practical debugging
Controller parameter qc,iAnd qd,iWhen, it should change in the transit time of charge and discharge process, energy-storage units carrying capacity and performance number is allowed
In the range of choosing comprehensively；
5.3 on-line operations, the CPU for starting mixed energy storage system charge and discharge process switching control computer read hybrid energy-storing
System charge and discharge process model parameter and optimizing controller parameter, and execute " mixed energy storage system electric discharge handoff procedure optimization control
Processing procedure sequence " controls filling for mixed energy storage system by the practical carrying capacity of each energy-storage units in on-line measurement mixed energy storage system
Electricity is filled with power and releasing power with discharge process, realizes effective control of mixed energy storage system charge and discharge process.
Beneficial effects of the present invention are：It first passes through energy-storage system mechanism and establishes mixed energy storage system charging and recharging model, then lead to
Data-oriented is crossed, common Lyapunov functions positive definite symmetric matrices is acquired, further acquires switch controller, about in conjunction with system
Beam and performance indicator realize the dynamic optimization redesign of switch controller, are further substituted into and close energy storage charging and recharging model,
For its charge and discharge control, this design method is succinct, easy-to-use, can be used for instructing actual, charge and discharge control process.
Description of the drawings
Fig. 1 is embodiment mixed energy storage system charge and discharge switching control state of charge curve graph.
Fig. 2 is embodiment mixed energy storage system charge and discharge power switched input function curve graph.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings.
Referring to Figures 1 and 2, a kind of mixed energy storage system charge and discharge handoff procedure dynamically optimized control method, including it is following
Step：
Step 1: considering the mixed energy storage system being made of 2 energy-storage units.With the change of the remaining carrying capacity of energy-storage units
Change and indicates that charge and discharge process, applied energy conservation principle establish the dynamic number of the charge and discharge process of energy-storage units in energy-storage system
Model is learned, sees formula (1) and (2)
Wherein, 2 expression mixed energy storage systems are made of 2 energy-storage units, and formula (1) indicates the charging of i-th of energy-storage units
Process dynamic model, formula (2) indicate that the discharge process dynamic model of i-th of energy-storage units, t indicate the time (min) of charge and discharge,
QiIndicate the remaining carrying capacity (MW) of i-th of energy-storage units, PiIndicate the charge-discharge electric power (MW/min) of i-th of energy-storage units,
σc,iIndicate the self-discharge rate (%/min) of the charging process of i-th of energy-storage units, ηc,iIndicate the charging effect of i-th of energy-storage units
Rate (%), σd,iIndicate the self-discharge rate (%/min) of the discharge process of i-th of energy-storage units, ηd,iIndicate i-th of energy-storage units
Discharging efficiency (%).
Step 2: considering the charge and discharge actual conditions of energy-storage system, defined variable xi=QiAnd ui=Pi, wherein i=1,2,
Define the vector of mixed energy storage systemWithAccording to formula (1) and (2), mixed energy storage system is defined respectively
Charge and discharge process dynamic mathematical models, see formula (3) and (4)
Wherein, formula (3) indicates that the charging process dynamic model of mixed energy storage system, formula (4) indicate mixed energy storage system
Discharge process dynamic model, t indicate that the time (min) of charge and discharge, x indicate the carrying capacity (MW) of energy storage device in energy-storage system, u
Indicate charge-discharge electric power (MW/min).
Step 3: considering mixed energy storage system charge/discharge transformation modular form (3) and (4), matrix is definedSolve inequality
Equation group is shown in formula (5)
Wherein P is known variables.The known variables P that formula (5) is solved using One- place 2-th Order inequation group, obtains formula
(5) solution is shown in formula (6)
In sampling instant t, the current carrying capacity x (t) of mixed energy storage system, construction charging process input power function u are measuredc
(t), see formula (7)
With discharge process input function ud(t), see formula (8)
Wherein With unknown parameter θ1、θ2、θ3And θ4。
Step 4: considering the constraint of mixed energy storage system carrying capacity and power input output constraint, setup parameter θ1、θ2、θ3With
θ4Value range D, mixed energy storage system charging performance object function lc(x, u) is shown in formula (9)
With mixed energy storage system discharge performance object function ld(x, u) is shown in formula (10)
Wherein, x1,cAnd x2,cIt is the charge target of 2 energy-storage units, x1,dAnd x2,dIt is the discharge target of 2 energy-storage units,
qc,1、qc,2、qd,1And qd,2It is tuning parameter.To mixed energy storage system charging process, using univariate search technique solving-optimizing problem,
See formula (11)
Obtain parameter optimal value θ1 *And θ2 *；To mixed energy storage system discharge process, asked using univariate search technique solving-optimizing
Topic, is shown in formula (12)
Obtain parameter optimal value θ3 *And θ4 *, wherein X indicates that mixed energy storage system carrying capacity restrict, U indicate mixing
The power input output constraint of energy-storage system charge and discharge process limits, and T indicates optimization time domain, Jc(x) it indicates in optimization time domain
Cumulative charging process performance function, Jd(x) the cumulative discharge process performance function in optimization time domain is indicated, by parameter optimal value
(θ1 *,θ2 *) and (θ3 *,θ4 *) formula (7) and formula (8) are substituted into respectively, obtain mixed energy storage system charging process optimal controller and electric discharge
Process optimization controller, after next sampling time reaches, iterative solution formula (11) and formula (12), obtain hybrid energy-storing system again
System charging process optimal control in dynamic device and discharge process optimal control in dynamic device.
Step 5: the execution of mixed energy storage system charge and discharge, runs on mixed energy storage system charge and discharge control computer
Implement, 3 stages can be roughly divided into：
5.1 parameter settings, including model parameter and charge and discharge process target component are imported in model in interface, defeated respectively
Enter the self-discharge rate σ that each energy-storage units are charged and discharged processc,iAnd σd,i(%/min), charge efficiency ηc,i, discharging efficiency
ηd,i；It is arranged in interface in control parameter, inputs the initial carrying capacity of each energy-storage units, the value range of unknown parameter respectively
D, the charge target x of energy-storage unitsi,c, the discharge target x of energy-storage unitsi,d, carrying capacity restrict X, power input output is about
Beam limits U, optimizes time domain T, after input parameter confirms, data will be arranged by control computer and be sent into computer storage unit RAM
Middle preservation；
5.2 offline debugging, click the Debug button in configuration interface, hybrid energy-storing charge-discharge control system enters control
Device debugs the stage；Consider that charging process and discharge process, adjustment configuration set adjustable parameter q in interface respectivelyc,iAnd qd,iTake
Value observes the control effect of the charged and charge-discharge electric power of each energy-storage units of mixed energy storage system, thereby determines that one group of energy is good
The controller parameter value of mixed energy storage system charge and discharge process, parameter q are controlled wellc,iAnd qd,iValue rule：qc,iAnd qd,iFor
Positive real number, i.e. qc,i＞ 0 and qd,i＞ 0, parameter qc,iAnd qd,iAdjustment rule：Increase qc,iValue will shorten the mistake of charging process
It crosses the time, but increases the variation of energy-storage units carrying capacity and the performance number of charging process, increase the sensibility disturbed to charging process,
Increase qd,iValue will shorten transit time of discharge process, but increase the variation of energy-storage units carrying capacity and the power of discharge process
Value increases the sensibility disturbed to discharge process；On the contrary, reducing qc,iValue will extend transit time of charging process, but reduce
The energy-storage units carrying capacity of charging process changes and performance number, reduces the sensibility disturbed to charging process, reduces qd,iValue will
Extend the transit time of discharge process, but reduce the variation of energy-storage units carrying capacity and the performance number of discharge process, reduces to electric discharge
The sensibility of process disturbance.Therefore, practical debugging control device parameter qc,iAnd qd,iWhen, should charge and discharge process transit time,
Choosing comprehensively in the range of the variation of energy-storage units carrying capacity and performance number are allowed；
5.3 on-line operations click configuration interface " RUN " button, start mixed energy storage system charge and discharge control computer
CPU reads mixed energy storage system charge and discharge process model parameter, charge and discharge process target component and optimizing controller parameter, and holds
Row " mixed energy storage system electric discharge handoff procedure optimal control program ", passes through different energy storage lists in on-line measurement mixed energy storage system
The practical carrying capacity of member, control charging and discharging process are filled with power and releasing power, realize mixed energy storage system charge and discharge
Effective control of process.
The present invention will be further described with example below in conjunction with the accompanying drawings：
The performance of established model in order to verify needs to be fitted model and verify.Choose the maximum lotus of energy-storage units 1
Electricity Q1max=0.75 (MW), charging process self-discharge rate σc1=0.01 (%/min), discharge process self-discharge rate σd1=0.01
(%/min), charge efficiency ηc1=0.95 and discharging efficiency ηd1=0.95；The maximum carrying capacity Q of energy-storage units 22max=1.5
(MW), charging process self-discharge rate σc2=0.01 (%/min), discharge process self-discharge rate σd2=0.01 (%/min), charging
Efficiency is η2=0.90 and discharging efficiency ηd2=0.90.It is in charging process in mixed energy storage system, the charging of energy-storage units 1
Process control target is xc,1=0.95Q1maxCharging process control targe with energy-storage units 2 is xc,2=0.9Q2max；It is mixing
Energy-storage system is in discharge process, and the discharge process control targe of energy-storage units 1 is xd,1=0.25Q1maxWith energy-storage units 2
Discharge process control targe be xd,2=0.2Q2max；Mixed energy storage system carrying capacity restrict X=[0.2Q1max,Q1max]×
[0.15Q2max,Q2max], power input output constraint limits [- 2,2] × [- 4,4] U=, optimization time domain T=3.5 minutes, sampling
0.7 minute period, value range D=[0.1 1] × [0.5,5] of unknown parameter.The initial residual of mixed energy storage system is set
Carrying capacity, energy-storage units 1 are 0.6Q1maxIt is 0.55Q with energy-storage units 22max, will cut after mixed energy storage system charging process
Change to discharge process.
By debugging offline, arrange parameter qc,1=50, qc,2=50, qd,1=1 and qd,2=1, carry it into formula (9) and formula
(10), the power input output function for acquiring mixed energy storage system charging process and discharge process obtains as shown in Figure 2.Later
It brings the function into formula (3) and formula (4), obtains as shown in Figure 1, energy-storage units 1 and energy-storage units 2 in mixed energy storage system
Charge and discharge process remaining carrying capacity result of variations.
Above-described embodiment is used for illustrating the present invention, rather than limits the invention, the present invention spirit and
In scope of the claims, to any modification that the present invention makes, protection scope of the present invention is both fallen within.
Claims (2)
1. a kind of mixed energy storage system charge and discharge handoff procedure dynamically optimized control method, it is characterised in that：Include the following steps：
Step 1: considering i-th of energy-storage units in mixed energy storage system, indicated with the variation of the remaining carrying capacity of energy-storage units
Charge and discharge process, applied energy conservation theorem establish the dynamic mathematical models of the charge and discharge process of the energy-storage units, see formula (1)
(2)
Wherein, n indicates that the energy-storage units sum in mixed energy storage system, formula (1) indicate that the charging process of i-th of energy-storage units is dynamic
States model, formula (2) indicate that the discharge process dynamic model of i-th of energy-storage units, t indicate the time of charge and discharge, unit min, Qi
Indicate the remaining carrying capacity of i-th of energy-storage units, unit MW, PiIndicate the charge-discharge electric power of i-th of energy-storage units, unit MW/
Min, σc,iIndicate the self-discharge rate of the charging process of i-th of energy-storage units, unit %/min, ηc,iIndicate i-th of energy-storage units
Charge efficiency, unit %, σd,iIndicate the self-discharge rate of the discharge process of i-th of energy-storage units, unit %/min, ηd,iIt indicates
The discharging efficiency of i-th of energy-storage units, unit %；
Step 2: the charge status of practical mixed energy storage system is considered, to mixed energy storage system charge and discharge process dynamic model
Carry out shift design, defined variable xi=QiAnd ui=Pi, wherein i=1 ..., n define the vector of mixed energy storage systemWithAccording to formula (1) and (2), the dynamic mathematics of the charge and discharge process of mixed energy storage system is defined respectively
Model is shown in formula (3) and (4)
Wherein, formula (3) indicates that the charging process dynamic model of mixed energy storage system, formula (4) indicate the electric discharge of mixed energy storage system
Process dynamic model, t indicate that the time of charge and discharge, unit min, x indicate the carrying capacity of energy storage device in energy-storage system, unit
MW, u indicate charge-discharge electric power, unit MW/min；
Step 3: considering energy-storage units charge/discharge transformation modular form (3) and (4), matrix is defined
Inequation group is solved, sees formula (5)
Wherein P is known variables；The known variables P that formula (5) is solved using One- place 2-th Order inequation group, obtains formula (5)
Solution, is shown in formula (6)
Subscript n × n indicates that P is that the matrix of n rows n row measures the current carrying capacity x (t) of mixed energy storage system, structure in sampling instant t
Make charging process input function uc(t), see formula (7)
With discharge process input function ud(t), see formula (8)
Wherein, With unknown parameter θ1、θ2、θ3With
θ4；
Step 4: considering the constraint of mixed energy storage system carrying capacity and power input output constraint, setup parameter θ1、θ2、θ3And θ4's
Value range D, mixed energy storage system charging performance object function lc(x, u) is shown in formula (9)
With mixed energy storage system discharge performance object function ld(x, u) is shown in formula (10)
Wherein, xi,cIt is the charge target of i-th of energy-storage units, xi,dIt is the discharge target of i-th of energy-storage units, qc,iAnd qd,iIt is
Tuning parameter, i=1 ..., n are shown in formula (11) to mixed energy storage system charging process using univariate search technique solving-optimizing problem
Obtain parameter optimal value θ1 *And θ2 *；Mixed energy storage system discharge process is shown in using univariate search technique solving-optimizing problem
Formula (12)
Obtain parameter optimal value θ3 *And θ4 *, wherein X indicates that mixed energy storage system carrying capacity restrict, U indicate hybrid energy-storing system
The power input output constraint limitation of system charge and discharge process, T indicate optimization time domain, Jc(x) cumulative filling in optimization time domain is indicated
Electric process performance function, Jd(x) the cumulative discharge process performance function in optimization time domain is indicated, by parameter optimal value (θ1 *,θ2 *)
(θ3 *,θ4 *) formula (7) and formula (8) are substituted into respectively, obtain mixed energy storage system charging process optimal controller and discharge process optimization
Controller, after next sampling time reaches, iterative solution formula (11) and formula (12), obtain mixed energy storage system and charged again
Journey optimal control in dynamic device and discharge process optimal control in dynamic device.
2. a kind of mixed energy storage system charge and discharge handoff procedure dynamically optimized control method as described in claim 1, feature
It is：The dynamically optimized control method is further comprising the steps of：
Implement Step 5: being run on mixed energy storage system charge and discharge process switching control computer, is divided into 3 stages：
5.1 parameter settings, including model parameter and charge and discharge process target component are imported in model in interface, and input is each respectively
A energy-storage units are charged and discharged the self-discharge rate σ of processc,iAnd σd,i, unit %/min, charge efficiency ηc,i, discharging efficiency
ηd,i；It is arranged in interface in control parameter, inputs the initial carrying capacity of each energy-storage units, the value range of unknown parameter respectively
D, the charge target x of energy-storage unitsi,c, the discharge target x of energy-storage unitsi,d, carrying capacity restrict X, power input output is about
Beam limits U, optimizes time domain T, after input parameter confirms, data will be arranged by control computer and be sent into computer storage unit RAM
Middle preservation；
5.2 offline debugging, hybrid energy-storing charge-discharge control system enter the controller debugging stage, consider charging process respectively and put
Electric process, adjustment configuration set adjustable parameter q in interfacec,iAnd qd,iValue, observe each energy-storage units of mixed energy storage system
Charged and charge-discharge electric power control effect, thereby determine that one group of control that can well control mixed energy storage system charge and discharge process
Device parameter value processed, parameter qc,iAnd qd,iValue rule：qc,iAnd qd,iFor positive real number, i.e. qc,i＞ 0 and qd,i＞ 0, parameter qc,iWith
qd,iAdjustment rule：Increase qc,iValue will shorten transit time of charging process, but increase the energy-storage units lotus of charging process
Electric quantity change and performance number increase the sensibility disturbed to charging process, increase qd,iValue by the transition for shortening discharge process when
Between, but increase the variation of energy-storage units carrying capacity and the performance number of discharge process, increase the sensibility disturbed to discharge process；Phase
Instead, reduce qc,iValue will extend transit time of charging process, but reduce the variation of energy-storage units carrying capacity and the work(of charging process
Rate value reduces the sensibility disturbed to charging process, reduces qd,iValue will extend transit time of discharge process, but reduce and put
The energy-storage units carrying capacity of electric process changes and performance number, reduces the sensibility disturbed to discharge process；Therefore, practical debugging control
Device parameter q processedc,iAnd qd,iWhen, it should allow in the transit time of charge and discharge process, the variation of energy-storage units carrying capacity and performance number
Choosing comprehensively in range；
5.3 on-line operations, the CPU for starting mixed energy storage system charge and discharge process switching control computer read mixed energy storage system
Charge and discharge process model parameter and optimizing controller parameter, and execute " mixed energy storage system electric discharge handoff procedure optimal control journey
Sequence " is controlled the charging of mixed energy storage system and is put by the practical carrying capacity of energy-storage units in on-line measurement mixed energy storage system
Electric process is filled with power and releasing power, realizes effective control of mixed energy storage system charge and discharge process.
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