CN109713687A - A kind of control method and control system participating in frequency modulation using energy-storage battery - Google Patents
A kind of control method and control system participating in frequency modulation using energy-storage battery Download PDFInfo
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Abstract
This application involves a kind of control methods and control system that frequency modulation is participated in using energy-storage battery, and control method includes: data collection steps: acquisition power grid frequency modulation historical data calculates control signal value according to the frequency modulation historical data；Regular modeling procedure: the frequency modulation characteristic needed for describing power grid according to the control signal value determines the frequency modulation control rule of energy-storage battery according to the frequency modulation characteristic；Energy storage configuration step: configuring the energy storage power and capacity of the energy-storage battery according to the frequency modulation control rule, and the energy-storage battery is made to participate in the frequency modulation to power grid.The present invention can effectively improve power supply reliability and power supply quality in power distribution network reasonable arrangement energy-storage system using the control method and control system that energy-storage battery participates in frequency modulation, solve the problems, such as low-voltage, while can delay the investment of power distribution network.
Description
Technical field
The application belongs to battery energy storage technical field, more particularly, to a kind of controlling party for participating in frequency modulation using energy-storage battery
Method and control system.
Background technique
Energy storage technology is supported as the important technology of construction of energy internet, is increasingly becoming multiple national energy scientific and technical innovations
The focus supported with industry.Energy storage promotes the essence of power network development mode to become by way of increasing time variable to energy
Leather.Energy storage technology can be widely used in Generation Side, the power grid of electric system as the key technology in global energy internet
Side and user side for sufficiently consumption clean energy resource, ensure power grid security, stabilize load fluctuation and distributed generation resource is grid-connected etc. provides
Support.
In Generation Side: the fm capacity of coal unit can be improved in conjunction with conventional electric power generation technology in energy storage, improves coal burning machine
The economic operation level of group, the fluctuation of smooth new energy play auxiliary new energy to optimize the power supply architecture of whole system
The key effect of electricity generation grid-connecting, research application is more at this stage.Randomness, the unstability of generation of electricity by new energy are unfavorable for greatly
The electricity generation grid-connecting of scale, and match energy storage device and carry out flat volatility, auxiliary online then provides surely for electric system
Fixed, safety power supply environment, and achieve better effects.
In grid side: power energy storage can enrich peak load regulation network control measures, improve power grid power supply reliability, improve electric energy
Quality, delays electric grid investment, improves grid equipment utilization rate, using power-type energy-storage system can quickly support load to power supply
Energy-storage system is applied in power grid by the demand of power output, the low high-incidence income of storage can be obtained under the mechanism of time-of-use tariffs, simultaneously
It can also be from delaying equipment for power transmission and distribution upgrading, reduce electric line network loss, reduce electric network reliability cost etc. and obtain
Benefit.Its generate economy income be it is various, direct yield is not limited only to, so carrying out analysis spininess to its economy
To the main application of energy-storage battery, planning application is carried out by target of investment subject, there is realistic meaning.
In user side: energy-storage system is conducive to power consumer and is actively engaged in operation of power networks, promotes the reduction with energy cost, by
There is quick-reaction capability in battery energy storage system, can exert advantages of oneself in quick adjust, therefore be installed in user
Side, for adjusting load, offer uninterrupted power supply etc., the focus studied at present still concentrates on energy-storage system and adjusts load band
The electricity charge benefit come provides uninterrupted power supply, reduces customer outage cost etc. and accordingly studied.
In traditional frequency modulation technology, the balance of generated output and workload demand is maintained by the quick increase and decrease of output power,
Easily occur the low-response of generator, creep speed it is low caused by: it is slow because climbing due to cannot realize quickly regulation goal to
It fast implements and dispatches again, thus all area control error corrections cannot be provided；It can not be changed direction rapidly because climbing slowly,
Sometimes reversed adjusting even can be provided, thus generator will increase area control error sometimes.
Therefore, there is an urgent need to charge and discharge control strategy and configuration method that a kind of pair of energy-storage battery participates in frequency modulation applying equation,
It is allowed to while the stability and reliability for ensuring power grid, the frequency of power grid is maintained into 50Hz or so, that is, needs to keep in real time
Balance between power generation and workload demand.
Summary of the invention
The technical problem to be solved by the present invention is to solve to carry out by the quick increase and decrease of output power in the prior art
Frequency modulation caused by frequency modulation is ineffective, to provide a kind of control method and control system for participating in frequency modulation using energy-storage battery.
The technical solution adopted by the present invention to solve the technical problems is:
A kind of control method participating in frequency modulation using energy-storage battery, comprising:
Data collection steps: acquisition power grid frequency modulation historical data calculates control signal value according to the frequency modulation historical data；
Regular modeling procedure: the frequency modulation characteristic needed for describing power grid according to the control signal value, it is special according to the frequency modulation
Property determine energy-storage battery frequency modulation control rule；
Energy storage configuration step: the energy storage power and capacity of the energy-storage battery are configured according to the frequency modulation control rule, is made
The energy-storage battery participates in the frequency modulation to power grid.
In one of the embodiments, further include:
Target and constraint step: setpoint frequency stability index, the voltage fluctuation margin of tolerance and fractional harmonic Con trolling index,
When the frequency modulation control rule meets the frequency stabilization index, the voltage fluctuation margin of tolerance and fractional harmonic Con trolling index
When, the frequency modulation control rule enters energy storage configuration step, and otherwise the frequency modulation control rule is filtered out.
In one of the embodiments, further include:
Analysis and appraisal procedure: the creep speed and frequency of the frequency modulation equipment after analyzing the energy-storage battery participation frequency modulation are anti-
To regulating power, and charge to the frequency modulation historical data.
Frequency modulation characteristic needed for describing power grid according to the control signal value in one of the embodiments, comprising:
Frequency departure signal delta f of the acquisition power grid at the i-th moment in real timei, and QSOC,min≤QSOC,low<QSOC,ref<QSOC,high
≤QSOC,max, wherein QSOCIndicate the energy-storage battery state-of-charge, QSOC,lowFor the energy-storage battery state-of-charge lower value,
QSOC,highHigh value, Q for the energy-storage battery state-of-chargeSOC,minFor the energy-storage battery state-of-charge minimum value,
QSOC,refFor the state-of-charge reference value of the energy-storage battery, QSOC,maxFor the state-of-charge maximum value of the energy-storage battery；
The frequency modulation control rule of energy-storage battery is determined according to the frequency modulation characteristic comprising:
As Δ fiCross Regulation dead-band Δ fdbAllowed band [Δ fdb_d,Δfdb_u] when: as Δ fi>Δfdb_uAnd QSOC,min
<QSOC<QSOC,maxWhen, the energy-storage battery charging, as Δ fi<Δfdb_dAnd QSOC,min<QSOC<QSOC,maxWhen, the energy-storage battery
Electric discharge, the power instruction of the energy-storage battery charge and discharge is by Δ fiIt converts；As Δ fi>Δfdb_uAnd QSOC=QSOC,maxWhen,
Energy is absorbed using energy consumption resistor, energy-storage battery need to receive related economic punishment, as Δ fi<Δfdb_dAnd QSOC=QSOC,minWhen,
Energy-storage battery be not involved in primary frequency modulation and need to receive related economic punishment, the economic punishment be setting short of electricity penalty coefficient and
The product of energy-storage battery institute short of electricity amount；
As Δ fdb_d<Δfi<Δfdb_uWhen: work as QSOC,high<QSOC<QSOC,maxWhen, the energy-storage battery electric discharge simultaneously sale of electricity,
In, Psell≤σsPrated、Pbuy≤σb·Prated、0<σs< 1, σsFor sale of electricity power coefficient, σbFor power purchase power coefficient, PsellTo sell
Electrical power, PratedFor the energy-storage battery rated power, PbuyFor power purchase power；Work as QSOC,low<QSOC<QSOC,highWhen, the storage
It can battery attonity.
The energy storage power and appearance of the energy-storage battery are configured according to the frequency modulation control rule in one of the embodiments,
Amount makes the energy-storage battery participate in the frequency modulation to power grid comprising:
Initialize QSOC,high、QSOC,low、Pbuy、PsellAnd PratedVariable；Secondly, being loaded into the physics of the energy-storage battery
Characteristic model and power grid frequency modulation dynamic model and relevant parameter；Then, based on the frequency modulation control rule, with primary frequency modulation effect
Evaluation index J1Minimum optimization aim determines control variable (Q by genetic algorithm optimizingSOC,high、QSOC,low、Pbuy、PsellWith
Prated) optimum combination solution, and calculate and in the combination take off the rated capacity E of the energy-storage batteryrated、J1With the energy storage electricity
Pond state-of-charge root mean square QSOC,rmsValue as output as a result, the PratedAnd EratedFor the energy-storage battery allocation plan.
The energy storage power and appearance of the energy-storage battery are configured according to the frequency modulation control rule in one of the embodiments,
Amount makes the energy-storage battery participate in the frequency modulation to power grid comprising:
Initialize QSOC,high、QSOC,low、Pbuy、PsellAnd PratedVariable；Secondly, the physics for being loaded into the energy-storage battery is special
Property model and power grid frequency modulation dynamic model and relevant parameter；Then, it based on the frequency modulation control rule, is commented with primary frequency modulation effect
Valence index J1, the energy-storage battery state-of-charge QSOCFor constraint condition, seek controlling variable accordingly by genetic algorithm
(QSOC,high、QSOC,low、Pbuy、PsellAnd Prated) optimum combination solution, and calculate and in optimum combination take off Erated、PNET、J1With
QSOC,rmsValue as output result, wherein QSOC,rmsFor energy-storage battery state-of-charge root mean square, PNETFor Current value of the net benefits, institute
State PratedAnd EratedFor the energy-storage battery capacity configuration scheme.
A kind of control system participating in frequency modulation using energy-storage battery, comprising:
Data acquisition module is used for: acquisition power grid frequency modulation historical data, calculates control letter according to the frequency modulation historical data
Number value；
Regular modeling module, is used for: the frequency modulation characteristic needed for describing power grid according to the control signal value, according to the tune
Frequency characteristic determines the frequency modulation control rule of energy-storage battery；
Energy storage configuration module, is used for: the energy storage power and appearance of the energy-storage battery are configured according to the frequency modulation control rule
Amount makes the energy-storage battery participate in the frequency modulation to power grid.
In one of the embodiments, further include:
Target and constraints module, are used for: setpoint frequency stability index, the voltage fluctuation margin of tolerance and fractional harmonic control
Index, when the frequency modulation control rule meets the frequency stabilization index, the voltage fluctuation margin of tolerance and fractional harmonic control
When index, the frequency modulation control rule enters energy storage configuration step, and otherwise the frequency modulation control rule is filtered out.
In one of the embodiments, further include:
Analysis and evaluation module, are used for: analyze the energy-storage battery participate in the creep speed of the frequency modulation equipment after frequency modulation with
The reversed regulating power of frequency, and charge to the frequency modulation historical data.
It is described in one of the embodiments, to participate in the control system of frequency modulation in 10kV route using energy-storage battery.
The beneficial effects of the present invention are: the control method and control system of the invention that frequency modulation is participated in using energy-storage battery,
In power distribution network reasonable arrangement energy-storage system, power supply reliability and power supply quality can effectively improve, solve the problems, such as low-voltage, simultaneously
It can delay the investment of power distribution network.Energy storage device can preferably smooth new energy fluctuation and intermittent, extensive energy storage
System can also improve the economic operation level of coal unit, reduce the spinning reserve time, mention to the effects of energy saving and emission reduction of unit
It rises obvious.Large-scale battery energy storage device can be mentioned with the response time of Millisecond for the monopole locking of " direct current in day " engineering
It is supported for fast power, there is larger technical advantage relative to ordinary power regulating measure.
Detailed description of the invention
Fig. 1 is a kind of process for control method that frequency modulation is participated in using energy-storage battery that the present application embodiment provides
Figure；
Fig. 2 is that a kind of structure for control system that frequency modulation is participated in using energy-storage battery that the present application embodiment provides is shown
It is intended to；
Fig. 3 is a kind of totality side for control method that frequency modulation is participated in using energy-storage battery that the present application embodiment provides
Case flow diagram；
Fig. 4 is a kind of energy storage electricity for control method that frequency modulation is participated in using energy-storage battery that the present application embodiment provides
The capacity configuration flow chart optimal based on frequency modulation effect of pond participation frequency modulation；
Fig. 5 is a kind of energy storage electricity for control method that frequency modulation is participated in using energy-storage battery that the present application embodiment provides
The capacity configuration flow chart optimal based on economy of pond participation frequency modulation.
Specific embodiment
With reference to the accompanying drawing and specific embodiment, the present invention is described further, it should be noted that do not conflicting
In the case where, the features in the embodiments and the embodiments of the present application can be combined with each other.
In conjunction with shown in Fig. 1 and Fig. 3, the embodiment of the invention provides a kind of controlling parties that frequency modulation is participated in using energy-storage battery
Method, comprising:
Data collection steps S10: acquisition power grid frequency modulation historical data calculates control signal value according to frequency modulation historical data；
Regular modeling procedure S20: the frequency modulation characteristic needed for describing power grid according to control signal value is determined according to frequency modulation characteristic
The frequency modulation control rule of energy-storage battery；
Energy storage configuration step S30: configuring the energy storage power and capacity of energy-storage battery according to frequency modulation control rule, keeps energy storage electric
Pond participates in the frequency modulation to power grid.
In order to determine the constraint condition and economic goal that participate in this frequency modulation, in one of the embodiments, further include:
Target and constraint step S21: setpoint frequency stability index, the voltage fluctuation margin of tolerance and fractional harmonic control refer to
Mark, when frequency modulation control rule meets frequency stabilization index, the voltage fluctuation margin of tolerance and fractional harmonic Con trolling index, frequency modulation
Control rule enters energy storage configuration step, and otherwise frequency modulation control rule is filtered out.
In order to carry out economic analysis and recruitment evaluation, in one of the embodiments, further include:
Analysis and appraisal procedure S31: the creep speed and frequency of the frequency modulation equipment after analysis energy-storage battery participation frequency modulation are anti-
To regulating power, and charge to frequency modulation historical data.
It is excellent in one of the embodiments, in order to implement the calculating of frequency modulation control rule in conjunction with shown in Fig. 4 and Fig. 5
Change calculating process, the frequency modulation characteristic needed for describing power grid according to control signal value comprising:
Frequency departure signal delta f of the acquisition power grid at the i-th moment in real timei, and QSOC,min≤QSOC,low<QSOC,ref<QSOC,high
≤QSOC,max, wherein QSOCIndicate energy-storage battery state-of-charge, QSOC,lowLower value, Q for energy-storage battery state-of-chargeSOC,high
High value, Q for energy-storage battery state-of-chargeSOC,minFor the state-of-charge minimum value of energy-storage battery, QSOC,refFor energy-storage battery
State-of-charge reference value, QSOC,maxFor the state-of-charge maximum value of energy-storage battery；
The frequency modulation control rule that energy-storage battery is determined according to frequency modulation characteristic, designs energy-storage battery and participates in primary frequency modulation
Charge and discharge strategy comprising:
As Δ fiCross Regulation dead-band Δ fdbAllowed band [Δ fdb_d,Δfdb_u] when: as Δ fi>Δfdb_uAnd QSOC,min
<QSOC<QSOC,maxWhen, energy-storage battery charging, as Δ fi<Δfdb_dAnd QSOC,min<QSOC<QSOC,maxWhen, energy-storage battery electric discharge, energy storage
The power instruction of charging, discharging electric batteries is by Δ fiIt converts；As Δ fi>Δfdb_uAnd QSOC=QSOC,maxWhen, utilize energy consumption resistor
Energy is absorbed, energy-storage battery need to receive related economic punishment, as Δ fi<Δfdb_dAnd QSOC=QSOC,minWhen, energy-storage battery is not joined
With primary frequency modulation and need to receive related economic punishment, economic punishment be setting short of electricity penalty coefficient and energy-storage battery institute short of electricity amount
Product；
As Δ fdb_d<Δfi<Δfdb_uWhen: work as QSOC,high<QSOC<QSOC,maxWhen, energy-storage battery electric discharge simultaneously sale of electricity, wherein
Psell≤σsPrated、Pbuy≤σb·Prated、0<σs< 1, σsFor sale of electricity power coefficient, σbFor power purchase power coefficient, PsellFor sale of electricity
Power, PratedFor energy-storage battery rated power, PbuyFor power purchase power；Work as QSOC,low<QSOC<QSOC,highWhen, energy-storage battery is without dynamic
Make.In addition, working as Pbuy≤σb·Prated, energy-storage battery participate in power grid frequency modulation distribute rationally and control strategy research, and it is above-mentioned
σb、σsSelection need to be advanced optimized subsequent.
As shown in connection with fig. 4, in order to obtain optimal energy-storage battery configuration, in one of the embodiments, according to frequency modulation control
The energy storage power and capacity of system rule configuration energy-storage battery, make energy-storage battery participate in the frequency modulation to power grid comprising:
Initialize QSOC,high、QSOC,low、Pbuy、PsellAnd PratedVariable；Secondly, being loaded into the physical characteristic of energy-storage battery
Model and power grid frequency modulation dynamic model and relevant parameter；Then, based on frequency modulation control rule, with primary frequency modulation Indexes of Evaluation Effect
J1Minimum optimization aim determines control variable (Q by genetic algorithm optimizingSOC,high、QSOC,low、Pbuy、PsellAnd Prated)
Optimum combination solution, and calculate and take off the rated capacity E of energy-storage battery in the combinationrated、J1It is square with energy-storage battery state-of-charge
Root QSOC,rmsValue as output as a result, PratedAnd EratedFor energy-storage battery allocation plan.This embodiment compared with other embodiments,
For the energy-storage battery configuration that frequency modulation effect is optimal.
As shown in connection with fig. 5, in order to obtain optimal energy-storage battery configuration, in one of the embodiments, according to frequency modulation control
The energy storage power and capacity of system rule configuration energy-storage battery, make energy-storage battery participate in the frequency modulation to power grid comprising:
Initialize QSOC,high、QSOC,low、Pbuy、PsellAnd PratedVariable；Secondly, being loaded into the physical characteristic mould of energy-storage battery
Type and power grid frequency modulation dynamic model and relevant parameter；Then, based on frequency modulation control rule, and it can refer to constructed energy-storage battery
The economic evaluation model of primary frequency modulation is participated in, with primary frequency modulation Indexes of Evaluation Effect J1, energy-storage battery state-of-charge QSOCIt is about
Beam condition seeks controlling variable (Q accordingly by genetic algorithmSOC,high、QSOC,low、Pbuy、PsellAnd Prated) optimum combination
Solution, and calculate and take off E in optimum combinationrated、PNET、J1And QSOC,rmsValue as output result, wherein QSOC,rmsFor energy storage electricity
Pond state-of-charge root mean square, PNETFor Current value of the net benefits, PratedAnd EratedFor energy-storage battery capacity configuration scheme.This embodiment
It is the optimal energy-storage battery configuration of economic impacts compared with other embodiments.
In conjunction with shown in Fig. 2 and Fig. 3, the embodiment of the invention provides a kind of control systems that frequency modulation is participated in using energy-storage battery
System, comprising:
Data acquisition module 10, is used for: acquisition power grid frequency modulation historical data, calculates control signal according to frequency modulation historical data
Value；
Regular modeling module 20, is used for: the frequency modulation characteristic needed for describing power grid according to control signal value, according to frequency modulation characteristic
Determine the frequency modulation control rule of energy-storage battery；
Energy storage configuration module 30, is used for: configuring the energy storage power and capacity of energy-storage battery according to frequency modulation control rule, makes to store up
Energy battery participates in the frequency modulation to power grid.
Data acquisition module 10 uses technical grade I/O data acquisition module in one of the embodiments, has number
Amount and analog quantity channel, Phototube Coupling, support 12Bit data precision at high-speed pulse channel.Regular modeling module 20 is for above-mentioned
Energy-storage battery charge and discharge control strategy design in system should generate under the premise of meeting energy-storage battery frequency modulation service requirement
The configuration capacity of energy-storage battery is minimized, and energy-storage battery can be controlled when mains frequency deviation is within the scope of Regulation dead-band
Carry out additional charge and discharge movement.
In one of the embodiments, further include:
Target and constraints module 21, are used for: setpoint frequency stability index, the voltage fluctuation margin of tolerance and fractional harmonic control
Index processed, when frequency modulation control rule meets frequency stabilization index, the voltage fluctuation margin of tolerance and fractional harmonic Con trolling index,
Frequency modulation control rule enters energy storage configuration step, and otherwise frequency modulation control rule is filtered out.Then the module composition is similar to filter
Effect, otherwise satisfactory control rule operation not passes through and filters out by entering next link.
In one of the embodiments, further include:
Analysis and evaluation module 31, are used for: analysis energy-storage battery participates in the creep speed and frequency of the frequency modulation equipment after frequency modulation
The reversed regulating power of rate, and charge to frequency modulation historical data.
Input of the output of above-mentioned data acquisition module 10 as regular modeling module 20, the output of regular modeling module 20
As the input of target and constraints module 21, input of the output of target and constraints module 21 as energy storage configuration module 30, storage
Also the input as analysis and evaluation module 31 while the output of energy configuration module 30 is as control strategy output, analyzes and comments
The output for estimating module 31 enters the input terminal of data acquisition module 10 afterwards compared with historical data.
It is above-mentioned in one of the embodiments, to participate in the control system of frequency modulation in 10kV (kilovolt) using energy-storage battery
Route.Correspondingly, the above-mentioned control method for participating in frequency modulation using energy-storage battery also can be applied in 10kV route route.
In conclusion the control method and control system of the invention for being participated in frequency modulation using energy-storage battery, is closed in power distribution network
Reason arranges energy-storage system, can effectively improve power supply reliability and power supply quality, solves the problems, such as low-voltage, while can delay to match
The investment of power grid.Energy storage device can the fluctuation of preferably smooth new energy and intermittent, large-scale energy storage system can be with
The economic operation level of coal unit is improved, the spinning reserve time is reduced, the effects of energy saving and emission reduction of unit is promoted obvious.Big rule
The battery energy storage device of mould can provide fast power branch with the response time of Millisecond for the monopole locking of " direct current in day " engineering
It helps, there is larger technical advantage relative to ordinary power regulating measure.
A wherein embodiment of the invention will be described in detail below.It should be appreciated that the embodiment is only for explaination
The present invention and its effect, rather than limiting the scope of protection of the present invention:
It is object according to Nanyang, henan 10kV transmission line of electricity, in conjunction with shown in table 1, that builds 10kV transmission line of electricity utilizes storage
The control system that energy battery participates in frequency modulation is as follows:
Data acquisition module 10.Using Mxxc series CANopen industry I/O data acquisition module, the module is according to harshness
Industrial application environmental demand and design, be widely used in various industrial automation productions, safety defense monitoring system, automatic measurement
In control system.User can use the module of different I/O, carry out expansion I/O, realize that Presence Extensions control and data are adopted
Collection.Mxxc series CANopen industry I/O data acquisition module uses technical grade circuit design, and wherein digital quantity input uses light
Coupling isolation provides high-speed pulse counting input all the way, and dry, wet contact input type, analog input is supported to be isolated using amplifier,
Support the high-accuracy data acquisition of 12Bit, compatible 0~5VDC, 0~20mA, 4~20mA, 0-10V input type, DO output three
Pole pipe Sink output or relay output, provide high-speed pulse output all the way, thermal resistance RTD input support PT100 and
0-10VDC output is supported in PT1000 two types, analog quantity AO output.Using the DC power supply power supply of industrial general and with counnter attack
Design protection is connect, while providing DC working power output all the way for external equipment, saves field wiring difficulty and cost.
Regular modeling module 20.According to system requirements to parameter determination, assignment, import model, utilize it is improved heredity calculate
Method seeks sorrow solution.
The regional power grid simulation parameter of 1 energy-storage battery of table
The regional power grid simulation parameter of energy-storage battery shown in reference table 1, rule modeling and its it is subsequent as follows,
Step 1: the Regulation dead-band that energy-storage battery is arranged is identical as conventional power source.Synthetic load is disturbed into access area power grid
Frequency modulation dynamic model；
Step 2: the charge and discharge strategy of primary frequency modulation is participated in based on energy-storage battery, optimal with frequency modulation effect, economy is optimal
Optimal the two synthesis is target, to control variable QSOC,high、QSOC,low、Pbuy、PsellCarry out optimizing.
Step 3: energy-storage battery is calculated in the control variable value and corresponding mains frequency deviation obtained according to optimization
Power instruction when in Regulation dead-band with/without additional charge and discharge；Determine energy-storage battery rated power PratedOptimization range, side
Method is as follows: because energy-storage battery needed in frequency-modulating process to the corresponding energy-storage battery power instruction of frequency departure carry out completely with
Track, therefore PratedValue need to consider the corresponding power command value of maximum frequency deviation, while also need meter and energy storage itself operation
Characteristic.The maximum output value of energy-storage battery corresponds to 5.5MW under this operating condition, simultaneously, it is contemplated that maintains energy-storage battery itself fortune
Row generally about needs 15%PratedAnd certain margin of power, therefore determine that its optimization range is (5.5~11) MW.And then by seeking
The optimum control variable obtained can calculate corresponding energy-storage battery rated capacity Erated, primary frequency modulation Indexes of Evaluation Effect J1, and
Present value of cost CLCC, Current value of the net benefits PNET, energy-storage battery the equivalent cycle service life be TlifeEqual economic evaluation indexs.
With primary frequency modulation Indexes of Evaluation Effect J1With Current value of the net benefits PNETIt is obtained for the charge and discharge policy calculation of Bi-objective
Energy-storage battery capacity is 0.23Prated.h, J1For O.013, present value of cost CLCCFor 3.67*106Dollar, PNETFor 1.3*107Dollar.
Can be seen that by the every optimizing index of table 2 and calculated result, compared to the target value that single object optimization obtains, primary frequency modulation effect and
Economy has obtained a degree of balance.
The comprehensive optimal simulation result of 2 Bi-objective of table
It is enlightenment with the above-mentioned desirable embodiment according to the application, through the above description, relevant staff is complete
Full various changes and amendments can be carried out in the range of without departing from this item application technical idea.The technology of this item application
Property range is not limited to the contents of the specification, it is necessary to which the technical scope thereof is determined according to the scope of the claim.
Claims (10)
1. a kind of control method for participating in frequency modulation using energy-storage battery characterized by comprising
Data collection steps: acquisition power grid frequency modulation historical data calculates control signal value according to the frequency modulation historical data；
Regular modeling procedure: the frequency modulation characteristic needed for describing power grid according to the control signal value, it is true according to the frequency modulation characteristic
Determine the frequency modulation control rule of energy-storage battery；
Energy storage configuration step: configuring the energy storage power and capacity of the energy-storage battery according to the frequency modulation control rule, makes described
Energy-storage battery participates in the frequency modulation to power grid.
2. the control method according to claim 1 for participating in frequency modulation using energy-storage battery, which is characterized in that further include:
Target and constraint step: setpoint frequency stability index, the voltage fluctuation margin of tolerance and fractional harmonic Con trolling index work as institute
When stating frequency modulation control rule and meeting the frequency stabilization index, the voltage fluctuation margin of tolerance and fractional harmonic Con trolling index, institute
It states frequency modulation control rule and enters energy storage configuration step, otherwise the frequency modulation control rule is filtered out.
3. the control method according to claim 1 for participating in frequency modulation using energy-storage battery, which is characterized in that further include:
Analysis and appraisal procedure: the creep speed of the frequency modulation equipment after analyzing the energy-storage battery participation frequency modulation is reversely adjusted with frequency
Energy saving power, and charge to the frequency modulation historical data.
4. the control method according to claim 1 for participating in frequency modulation using energy-storage battery, which is characterized in that according to the control
Frequency modulation characteristic needed for signal value processed describes power grid comprising:
Frequency departure signal delta f of the acquisition power grid at the i-th moment in real timei, and QSOC,min≤QSOC,low<QSOC,ref<QSOC,high≤
QSOC,max, wherein QSOCIndicate the energy-storage battery state-of-charge, QSOC,lowFor the energy-storage battery state-of-charge lower value,
QSOC,highHigh value, Q for the energy-storage battery state-of-chargeSOC,minFor the energy-storage battery state-of-charge minimum value,
QSOC,refFor the state-of-charge reference value of the energy-storage battery, QSOC,maxFor the state-of-charge maximum value of the energy-storage battery；
The frequency modulation control rule of energy-storage battery is determined according to the frequency modulation characteristic comprising:
As Δ fiCross Regulation dead-band Δ fdbAllowed band [Δ fdb_d,Δfdb_u] when: as Δ fi>Δfdb_uAnd QSOC,min<QSOC
<QSOC,maxWhen, the energy-storage battery charging, as Δ fi<Δfdb_dAnd QSOC,min<QSOC<QSOC,maxWhen, the energy-storage battery electric discharge,
The power instruction of the energy-storage battery charge and discharge is by Δ fiIt converts；As Δ fi>Δfdb_uAnd QSOC=QSOC,maxWhen, it utilizes
Energy consumption resistor absorbs energy, and energy-storage battery need to receive related economic punishment, as Δ fi<Δfdb_dAnd QSOC=QSOC,minWhen, energy storage
Battery be not involved in primary frequency modulation and need to receive related economic punishment, the economic punishment be set short of electricity penalty coefficient with it is described
The product of energy-storage battery institute short of electricity amount；
As Δ fdb_d<Δfi<Δfdb_uWhen: work as QSOC,high<QSOC<QSOC,maxWhen, the energy-storage battery electric discharge simultaneously sale of electricity, wherein
Psell≤σs Prated、Pbuy≤σb·Prated、0<σs< 1, σsFor sale of electricity power coefficient, σbFor power purchase power coefficient, PsellFor sale of electricity
Power, PratedFor the energy-storage battery rated power, PbuyFor power purchase power；Work as QSOC,low<QSOC<QSOC,highWhen, the energy storage
Battery attonity.
5. the control method according to claim 4 for participating in frequency modulation using energy-storage battery, which is characterized in that according to the tune
Frequency controls the energy storage power and capacity that rule configures the energy-storage battery, and the energy-storage battery is made to participate in the frequency modulation to power grid,
Include:
Initialize QSOC,high、QSOC,low、Pbuy、PsellAnd PratedVariable；Secondly, being loaded into the physical characteristic of the energy-storage battery
Model and power grid frequency modulation dynamic model and relevant parameter；Then, based on the frequency modulation control rule, with primary frequency modulation effect assessment
Index J1Minimum optimization aim determines control variable (Q by genetic algorithm optimizingSOC,high、QSOC,low、Pbuy、PsellWith
Prated) optimum combination solution, and calculate and in the combination take off the rated capacity E of the energy-storage batteryrated、J1With the energy storage electricity
Pond state-of-charge root mean square QSOC,rmsValue as output as a result, the PratedAnd EratedFor the energy-storage battery allocation plan.
6. the control method according to claim 4 for participating in frequency modulation using energy-storage battery, which is characterized in that according to the tune
Frequency controls the energy storage power and capacity that rule configures the energy-storage battery, and the energy-storage battery is made to participate in the frequency modulation to power grid,
Include:
Initialize QSOC,high、QSOC,low、Pbuy、PsellAnd PratedVariable；Secondly, being loaded into the physical characteristic mould of the energy-storage battery
Type and power grid frequency modulation dynamic model and relevant parameter；Then, based on the frequency modulation control rule, referred to primary frequency modulation effect assessment
Mark J1, the energy-storage battery state-of-charge QSOCFor constraint condition, seek controlling variable accordingly by genetic algorithm
(QSOC,high、QSOC,low、Pbuy、PsellAnd Prated) optimum combination solution, and calculate and in optimum combination take off Erated、PNET、J1With
QSOC,rmsValue as output result, wherein QSOC,rmsFor energy-storage battery state-of-charge root mean square, PNETFor Current value of the net benefits, institute
State PratedAnd EratedFor the energy-storage battery capacity configuration scheme.
7. a kind of control system for participating in frequency modulation using energy-storage battery characterized by comprising
Data acquisition module is used for: acquisition power grid frequency modulation historical data, calculates control signal according to the frequency modulation historical data
Value；
Regular modeling module, is used for: the frequency modulation characteristic needed for describing power grid according to the control signal value, special according to the frequency modulation
Property determine energy-storage battery frequency modulation control rule；
Energy storage configuration module, is used for: configuring the energy storage power and capacity of the energy-storage battery according to the frequency modulation control rule, makes
The energy-storage battery participates in the frequency modulation to power grid.
8. the control system according to claim 7 for participating in frequency modulation using energy-storage battery, which is characterized in that further include:
Target and constraints module, are used for: setpoint frequency stability index, the voltage fluctuation margin of tolerance and fractional harmonic control refer to
Mark refers to when the frequency modulation control rule meets the frequency stabilization index, the voltage fluctuation margin of tolerance and fractional harmonic control
When mark, the frequency modulation control rule enters energy storage configuration step, and otherwise the frequency modulation control rule is filtered out.
9. the control system according to claim 7 for participating in frequency modulation using energy-storage battery, which is characterized in that further include:
Analysis and evaluation module, are used for: analyzing the creep speed and frequency of the frequency modulation equipment that the energy-storage battery participates in after frequency modulation
Reversed regulating power, and charge to the frequency modulation historical data.
10. according to the described in any item control systems for participating in frequency modulation using energy-storage battery of claim 7~9, which is characterized in that
It is described to participate in the control system of frequency modulation in 10kV route using energy-storage battery.
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