CN106786796A - A kind of wind-powered electricity generation participates in the control method and its system of power system frequency modulation - Google Patents
A kind of wind-powered electricity generation participates in the control method and its system of power system frequency modulation Download PDFInfo
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- CN106786796A CN106786796A CN201611184987.2A CN201611184987A CN106786796A CN 106786796 A CN106786796 A CN 106786796A CN 201611184987 A CN201611184987 A CN 201611184987A CN 106786796 A CN106786796 A CN 106786796A
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- 230000005611 electricity Effects 0.000 title claims abstract description 22
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- 238000005259 measurement Methods 0.000 description 6
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- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
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- 238000005299 abrasion Methods 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 238000005370 electroosmosis Methods 0.000 description 1
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Classifications
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
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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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H02J3/386—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
The present invention provides the control method and its system that a kind of wind-powered electricity generation participates in power system frequency modulation.The control method regulates and controls the frequency of the power system using the control of rotor kinetic energy and energy-storage system of accumulator.The present invention participates in the control method of power system frequency modulation based on the control of rotor kinetic energy and the coefficient wind-powered electricity generation of energy-storage system of accumulator, takes full advantage of wind energy, reduces the configuration capacity of energy-storage system, improves the economy of wind field operation.Even if in the case of larger load disturbance, the control method and its system can also play preferably effect.
Description
Technical field
The present invention relates to technical field of wind power generation, the control of power system frequency modulation is participated in more particularly, to a kind of wind-powered electricity generation
Method processed and its system.
Background technology
By the end of the end of the year 2015, global wind-powered electricity generation adding new capacity has reached 63.013GW, and world wind-powered electricity generation total installation of generating capacity is
Through breaking through 430GW, power network apoplexy electro-osmosis rate is improved constantly, and new problem is brought to power system frequency regulation.Using change
The Wind turbines of frequency device control, if additional control can not participate in system frequency adjustment；Wind turbines are generally in peak power
Point (Maximum Power Point, MPP) runs, it is impossible to provides reserve, does not possess the frequency modulation energy as synchronous machine
Power, it is impossible to ensure the safe and stable operation of system.
At present, the control strategy scholars for participating in system frequency modulation on wind-powered electricity generation have carried out substantial amounts of research.Main control
Strategy has rotor kinetic energy to control and power backup control.Rotor kinetic energy is controlled by controlling rotor speed, in release rotor
Kinetic energy support system frequency.Its concrete implementation method has virtual inertia control, droop control and combined inertia to control.Work(
The standby control of rate runs Wind turbines off-load by award setting or hypervelocity control, reserves standby for participating in system frequently
Rate is adjusted.Rotor kinetic energy control response speed is fast, but frequency support can only be provided in dynamic process, and the duration is short, to big
Load disturbance enough supports cannot be provided, while rotating speed easily causes the secondary reduction of frequency in recovery process；Pitch
It is standby that angle control can provide a secondary frequencies, but needs frequently to change propeller pitch angle, can aggravate the abrasion of mechanical part, reduces wind
The service life of machine；For hypervelocity control, the control that exceeds the speed limit cannot be realized in the case that wind speed is very high, at the same the operation of the volume of drop with it is economical
Property is contradicted.
The content of the invention
In order to solve the above problems or solve the above problems at least in part, the present invention provides a kind of wind-powered electricity generation and participates in electric power
The control method and its system of system frequency modulation.
A kind of wind-powered electricity generation provided by the present invention participates in the control method of power system frequency modulation, and methods described is using rotor
Kinetic energy is controlled and energy-storage system of accumulator regulates and controls the frequency of the power system.
Preferably, rotor kinetic energy control is parallel at the same bus of the power system with energy-storage system of accumulator, altogether
The same frequency to regulate and control the power system.
Preferably, the rotor kinetic energy control is using droop control and the frequency of the virtual inertia control regulation and control power system
Rate.
Preferably, the rotor kinetic energy control is using droop control and the frequency of the virtual inertia control regulation and control power system
Rate is concretely comprised the following steps：
Based on system frequency deviation, Δ P is obtained using the droop control1；
Based on system frequency rate of change, Δ P is obtained using virtual inertia control2；
To obtain the extra active reference signal Δ P of the wind power system, and Δ P=Δs P1+ΔP2。
Preferably, the rotor kinetic energy control regulation and control frequency is in 0~Δ PmaxIn the range of fluctuate the power system, institute
State energy-storage system of accumulator and regulate and control frequency in 0~Δ PmaxThe power system fluctuated outside scope, wherein, Δ PmaxIt is Δ P's
Maximum.
Preferably, the energy-storage system of accumulator is incorporated in the power system by circuit；The batteries to store energy system
System includes：Batteries, current transformer and transformer that multiple batteries are formed by parallel and/or series connection.
Preferably, the battery uses internal resistance Equivalent Model, and the model includes a preferable voltage source E0With one
Individual equivalent internal resistance r, both relations meet following formula：
Wherein, V0It is the terminal voltage of battery, I is the current value for flowing through the battery.
Preferably, the energy-storage system of accumulator also includes PQ control modules, is regulated and controled using the energy-storage system of accumulator
System frequency is concretely comprised the following steps：
Voltage, frequency, active power and reactive power based on grid-connected place, the unsteady flow is controlled using PQ control modules
Device, adjusts the frequency of the power system.
Preferably, the specific steps that the frequency of the power system is regulated and controled using the energy-storage system of accumulator are also included：
Based on the frequency at grid-connected place, frequency described in droop control Developing Tactics is used.
Preferably, the energy-storage system of accumulator also includes pi regulator, and system is regulated and controled using the energy-storage system of accumulator
System frequency is concretely comprised the following steps：
The active power that wind power plant exit bus is exported produces d with the difference with reference to active power by pi regulator
Axle reference current signal；
The voltage that wind power plant exit bus is exported produces q axles with reference to electricity with the difference of reference voltage by pi regulator
Stream signal；
Based on the d axles reference current signal and the q axles reference current signal, the exchange of the current transformer output is controlled
Voltage magnitude and phase, control the active power of the electric power storage energy-storage system output, so as to regulate and control the output of the power system
Frequency.
According to another aspect of the present invention, the control system that a kind of wind-powered electricity generation participates in power system frequency modulation, institute are additionally provided
Stating control system includes rotor kinetic energy control module and energy-storage system of accumulator.
Preferably, the control system also includes Wind turbines, wherein, the rotor kinetic energy control module is located at the wind
Inside group of motors；The Wind turbines are with the energy-storage system of accumulator each by transformers connected in parallel at same bus.
Preferably, the control system also includes frequency converter control system, and the frequency converter control system is used to export warp
Discrepancy marker signal after the rotor kinetic energy control module control.
Preferably, energy-storage system of accumulator is incorporated in the power system by circuit；The energy-storage system of accumulator bag
Include：Batteries, current transformer and transformer that multiple batteries are formed by parallel and/or series connection.
The wind-powered electricity generation that the application is proposed participates in the control method and system of power system frequency modulation, is controlled based on rotor kinetic energy and stored
Battery energy storage system collective effect, can utilize that energy-storage system of accumulator is quick to tell the ability of energy received, and suppress frequency fluctuation, subtract
The steady frequency deviation of mini system, improves dynamic frequency responding ability.Energy-storage system of accumulator compensate for the control of rotor kinetic energy
It is not enough；Rotor kinetic energy control simultaneously can give full play to blower fan fm capacity in itself, take full advantage of wind energy, reduce storage
The configuration capacity of energy system, improves the economy of wind field operation.Even if system wind-powered electricity generation permeability is higher, larger load disturbance
In the case of, the control method can also play preferable action effect, be able to maintain that system frequency stabilization.The method of the present invention
And system enhances the inertia of power system, the frequency fluctuation process that system loading disturbance causes is slow down.
Brief description of the drawings
Fig. 1 is according to rotor kinetic energy control principle drawing in a preferred embodiment of the invention；
Fig. 2 is the illustraton of model according to energy-storage system of accumulator in a preferred embodiment of the invention；
Fig. 3 is the control framework structure chart according to energy-storage system of accumulator in a preferred embodiment of the invention；
Fig. 4 is the FREQUENCY CONTROL block diagram according to energy-storage system of accumulator in a preferred embodiment of the invention；
Fig. 5 is the control block diagram according to energy-storage system of accumulator in a preferred embodiment of the invention；
Fig. 6 is according to the Simulation Model figure of the embodiment of the present invention 1.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the invention is described in further detail.Hereinafter implement
Example is not limited to the scope of the present invention for illustrating the present invention.
A kind of wind-powered electricity generation provided by the present invention participates in the control method of power system frequency modulation, and the method is dynamic using rotor
Can control and energy-storage system of accumulator regulation and control power system frequency.
The present invention innovatively combines the control of rotor kinetic energy and energy-storage system of accumulator to regulate and control to have wind-powered electricity generation to participate in frequency modulation
The frequency of power system, wherein, control that the adjustment effect of wind field itself can be made full use of using rotor kinetic energy, also ensure that wind
The economical operation of field；Energy-storage system of accumulator fast response time, scaleable, energy density are big, easy care, long lifespan, just
The deficiency of rotor kinetic energy control strategy can be made up, system frequency response characteristics can be significantly improved.
In the present invention, rotor kinetic energy control module and energy-storage system of accumulator are parallel at same bus, are adjusted jointly
Control power system frequency.
In the power system that wind-powered electricity generation is participated in, Wind turbines are usually contained, rotor kinetic energy control module is located at wind turbine
In group, Wind turbines each realize common regulation and control electricity by transformers connected in parallel with energy-storage system of accumulator at same bus
Force system frequency.
In the present invention, Wind turbines are preferably double-fed fan motor unit.
Wherein, rotor kinetic energy control discharges the kinetic energy in rotor to support system frequency by controlling rotor speed,
Its concrete implementation method has virtual inertia control, droop control and combined inertia to control.In the present invention, preferably select
Combined inertia controls (including droop control and virtual inertia control) to support system frequency, i.e. regulator control system frequency.
Also include frequency converter control system in the power system, it is active for exporting the discrepancy after being controlled through rotor kinetic energy
Signal.
When whole system has external disturbance, i.e., when system frequency is reduced, the control of rotor kinetic energy makes wind-powered electricity generation by force
The system blower rotor speed of participation reduces, and fan rotor kinetic energy is converted into electric energy, for supporting system frequency；In system frequently
Rate raise when, rotor kinetic energy control increase fan rotor rotation speed, fan rotor energy absorption, suppression system frequency it is upper
Rise.
In order to give full play to the advantage of virtual inertia control and droop control, in a specific embodiment, preferably will be
System frequency departure and frequency change rate introduce the Wind turbines active power controller ring of power system, as shown in Figure 1, i.e. rotor
Kinetic energy control controls concretely comprising the following steps for regulator control system frequency using droop control and virtual inertia：Based on system frequency deviation,
Δ P is obtained using the droop control1；Based on system frequency rate of change, Δ P is obtained using virtual inertia control2；To obtain
Obtain the extra active reference signal Δ P of the wind power system, and Δ P=Δs P1+ΔP2.That is,
Wherein, K1、K2Respectively virtual inertia control coefrficient and droop control coefficient,It is frequency change rate, Δ f is frequency
Rate deviation.
As shown in figure 1, f is system frequency, frIt is reference frequency.Wherein reference frequency refers in the undisturbed stabilization of system
Frequency during operation, usually rated frequency during operation of power networks.System frequency deviation forms Δ P by droop control link1,
System frequency rate of change forms Δ P by virtual inertia controlling unit2, sum of the two Δ P is extra active reference signal.Root
According to maximum wind power aircraft pursuit course, the maximum active power reference value P under the rotating speed is obtainedMPPT, PMPPTWith extra active reference
Signal delta P collectively forms frequency converter control system value and power reference Pref, see Fig. 1.Wherein, the frequency converter control system in Fig. 1 refers to
The frequency converter of whole power system.When controlling whole power system frequency to change, frequency converter being equipped with power system, turn
Sub- kinetic energy control is located in Wind turbines, and Wind turbines are with energy-storage system of accumulator each by transformers connected in parallel in same bus
Place, frequency converter is located at bus, for the discrepancy marker signal of output rotor kinetic energy control.
In one embodiment of the invention, rotor kinetic energy control regulation and control frequency is in 0~Δ PmaxIn the range of fluctuate electric power
System, the battery regulates and controls frequency in 0~Δ PmaxThe power system fluctuated outside scope.I.e. to load in 0~Δ PmaxScope
It is interior, control to provide frequency support using rotor kinetic energy, so as to regulate and control power system frequency.To load when more than above range,
Frequency is provided using energy-storage system of accumulator to support, regulator control system frequency.Wherein, Δ PmaxIt is the maximum of Δ P.
Rotor kinetic energy control of the invention is parallel at same bus with energy-storage system of accumulator.Disturbed when system occurs load
When dynamic, the control of rotor kinetic energy is acted at once, when the control of rotor kinetic energy is not enough to support, i.e., 0~| Δ Pmax| when outside scope,
Energy-storage system will have an effect.
Above-mentioned control can be realized by the dead time of energy-storage system of accumulator.When frequency change is located within dead band
When, only rotor kinetic energy control action；When dead band is crossed, rotor kinetic energy cannot meet system frequency modulation demand, now battery
Energy-storage system will have an effect.
In the present invention, battery energy-storage system can include the storage that multiple batteries are formed by parallel and/or series connection
Battery pack, current transformer and transformer.Wherein, energy-storage system of accumulator is incorporated in power system by circuit.Multiple of the invention
Refer to 2 or more than 2.
Wherein, each battery can use internal resistance Equivalent Model, and the model includes a preferable voltage source E0With
One equivalent internal resistance r, both relations meet following formula：
In above-mentioned formula, V0It is the terminal voltage of battery, I is the current value for flowing through the battery.
By the battery of above-mentioned simplification by simultaneously, after series connection forming batteries, then sequentially pass through current transformer, transformer and
Circuit is incorporated in power system, constitutes energy-storage system of accumulator, as shown in Figure 2.
In the present invention, in order to more give full play to the effect of Wind turbines, energy-storage system of accumulator can also include PQ
Control module, the present invention can be based on voltage, frequency, active power and the reactive power at grid-connected place, using PQ control module controls
Current transformer in energy-storage system of accumulator processed, so as to adjust the frequency of power system.
As shown in figure 3, measuring voltage, frequency, active power and the nothing at the grid-connected place of energy-storage system of accumulator through measurement apparatus
Work(power, is controlled by PQ control modules to the current transformer of electric power storage stream energy-storage system, so that the frequency for participating in system is adjusted
Section.
In order to be able to the adjustment for responding quickly, the frequency at the grid-connected place obtained for measurement can also be under use
Hang down control strategy, the work(- frequency static characteristic curve of the primary frequency modulation of the policy-simulative synchronous generator, by system actual frequency f
With reference frequency f0The deviation df of (reference frequency is frequency values when power system normally runs) forms battery by dead band
The active reference signal f of energy-storage systemdead, multiplied by with work(- frequency coefficientObtain the active reference value of energy-storage system of accumulator
PrefEven if energy-storage system of accumulator can change according to the frequency of system, corresponding adjustment is made, support system frequency is such as schemed
Shown in 4.
When power system frequency changes, there is corresponding change in the active reference value of energy-storage system, by unsteady flow
After device control, energy-storage system is exported or absorbs active accordingly, and line frequency support is entered to system frequency.
In embodiment, active power that current transformer is exported using energy-storage system of accumulator exit bus and voltage are used as control
Signal processed, forms control active power of wind power field uneoupled control, reactive power uneoupled control after it is compared with reference value
Control signal, as shown in Figure 5.Wherein Pin、VinRespectively wind power plant exit (i.e. energy-storage system of accumulator exit) bus
The active power and voltage of output, Pref、VrefIt is active power reference signal and voltage reference signal, i.e., occurs in load disturbance
Performance number and magnitude of voltage at preceding grid-connected bus.PinWith refer to active-power PrefDifference dp by an inertial elementAgain d axle reference current signals I is produced by pi regulatord_ref；Virtual voltage VinWith reference voltage VrefVoltage deviation
Dv is while by inertial elementAnd dead band, while by integral elementCollective effect produces q axle reference current signals
Iq_refAnd then the alternating voltage amplitude and phase to current transformer output are controlled, so as to control the wattful power that energy-storage system is exported
Rate.
Based on the method for the present invention, the control system that a kind of wind-powered electricity generation participates in power system frequency modulation is additionally provided in embodiment
System, the system includes rotor kinetic energy control module and energy-storage system of accumulator.
Wherein, the system includes Wind turbines, and the rotor kinetic energy control module is located at blower interior；Wind turbines and storage
Battery energy storage system is each by transformers connected in parallel at same bus.
Wherein, the control system also includes frequency converter control system, and the frequency converter control system is used to export through institute
State the discrepancy marker signal after the control of rotor kinetic energy control module.
Wherein, the energy-storage system of accumulator also including dead band setting, when system frequency changing value be located at dead band it
When interior, rotor kinetic energy control regulation and control power system frequency；When the changing value of system frequency crosses dead band, energy-storage system of accumulator
Regulation and control power system frequency.
Wherein, energy-storage system of accumulator includes batteries, the unsteady flow that multiple batteries are formed by parallel and/or series connection
Device and transformer；Energy-storage system of accumulator is incorporated in power system by circuit.
Wherein it is possible to batteries, current transformer and transformer are incorporated to successively constitute electric power storage of the invention in power system
Pond energy-storage system.
Single battery is preferably using the battery of internal resistance Equivalent Model.
Also include voltage measurement module, frequency measuring block, PQ measurement modules, PQ control moulds in energy-storage system of accumulator
Block.Wherein, voltage measurement module is used to measure the voltage at grid-connected place, and frequency measuring block is used to measure the frequency at grid-connected place, PQ
Measurement module is used to measure the active power at grid-connected place and the reactive power at grid-connected place, and PQ control modules are used for according to voltage, frequency
Rate, active power and reactive power are controlled to current transformer, so as to participate in the frequency regulation of system.
Also include frequency control module in energy-storage system of accumulator, for using droop control Developing Tactics frequency.
Also include pi regulator in energy-storage system of accumulator, for the wattful power exported according to wind power plant exit bus
Rate produces d axles reference current signal and the voltage and ginseng according to the output of wind power plant exit bus with the difference with reference to active power
The difference for examining voltage produces q axle reference current signals.
Embodiment 1
Simulation study uses the district system of 4 machine 2 of classics, as shown in Figure 6.The system contains 11 nodes, contains
The wind field and energy-storage system of accumulator of rotor kinetic energy control are incorporated to B respectively through transformer2On number bus, energy-storage system of accumulator
Configuration capacity be 30MVA, wind field is 200MW (2MW × 100), and it is 8m/s that wind speed is permanent.G1、G2、G3Capacity be 800MW and
It is equipped with speed regulator and power system stabilizer, PSS.System loading L1, L2Size is respectively 1600MW, 900MW；L0It is disturbance load.
Whole simulation process continues 15s, is disturbed in 5s moment system loadings.Simulation comparison is without FREQUENCY CONTROL, rotor kinetic energy control
System, energy-storage system of accumulator and the two frequency response characteristic for jointly controlling.
Occur 5% in 5s moment system loading to disturb, the frequency of system can reduce, through after a period of time can be steady again
It is fixed.By taking 5% load disturbance as an example, without under control action, the maximum frequency deviation of system is 0.17062Hz, dynamic by rotor
After dynamic control, maximum frequency deviation is 0.15900Hz, improves 0.01162Hz；In the presence of energy-storage system of accumulator,
Maximum frequency deviation is 0.12691Hz, improves 0.04371Hz；Under two kinds of synergy of control mode, maximum frequency deviation
It is 0.11778Hz, improves 0.05284Hz.This illustrates that rotor kinetic energy controls the validity of joint energy-storage system control strategy,
Prove to jointly control the frequency that can further lift minimum point simultaneously, reduce maximum frequency deviation, improve frequency stability.It is comprehensive
Upper described, the mode combined using the control of rotor kinetic energy and energy-storage system of accumulator can improve the system frequency in load disturbance
Dynamic response characteristic.The mode action effect that wherein both combine is substantially better than energy-storage system of accumulator independent role and rotor
Kinetic energy controls independent role.
Each embodiment is described by the way of progressive in this specification, and what each embodiment was stressed is and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For device disclosed in embodiment
For, because it is corresponded to the method disclosed in Example, so description is fairly simple, related part is said referring to method part
It is bright.
Finally, the present processes are only preferably embodiment, are not intended to limit the scope of the present invention.It is all
Within the spirit and principles in the present invention, any modification, equivalent substitution and improvements made etc. should be included in protection of the invention
Within the scope of.
Claims (10)
1. a kind of wind-powered electricity generation participates in the control method of power system frequency modulation, it is characterised in that including：Controlled using rotor kinetic energy and stored
Battery energy storage system regulates and controls the frequency of the power system.
2. control method according to claim 1, it is characterised in that the rotor kinetic energy control uses droop control and void
Intend the frequency that inertia control regulates and controls the power system.
3. control method according to claim 2, it is characterised in that the rotor kinetic energy control uses droop control and void
Plan inertia control regulates and controls concretely comprising the following steps for the frequency of the power system：
Based on system frequency deviation, Δ P is obtained using the droop control1；
Based on system frequency rate of change, Δ P is obtained using virtual inertia control2；
To obtain the extra active reference signal Δ P of the wind power system, and Δ P=Δs P1+ΔP2。
4. control method according to claim 3, it is characterised in that the rotor kinetic energy control regulation and control frequency is in 0~Δ
PmaxIn the range of the power system fluctuated, the energy-storage system of accumulator regulates and controls frequency in 0~Δ PmaxFluctuated outside scope
The power system, wherein, Δ PmaxIt is the maximum of Δ P.
5. the control method according to claim 1 or 4, it is characterised in that the energy-storage system of accumulator by circuit simultaneously
In entering the power system；The energy-storage system of accumulator includes：The electric power storage that multiple batteries are formed by parallel and/or series connection
Pond group, current transformer and transformer.
6. control method according to claim 5, it is characterised in that the battery uses internal resistance Equivalent Model, described
Model includes a preferable voltage source E0With an equivalent internal resistance r, both relations meet following formula：
Wherein, V0It is the terminal voltage of battery, I is the current value for flowing through the battery.
7. control method according to claim 5, it is characterised in that the energy-storage system of accumulator also includes that PQ controls mould
Block, using concretely comprising the following steps for the energy-storage system of accumulator regulator control system frequency：
Voltage, frequency, active power and reactive power based on grid-connected place, the current transformer is controlled using PQ control modules, is adjusted
Save the frequency of the power system.
8. control method according to claim 7, it is characterised in that the energy-storage system of accumulator is also adjusted including PI
Device, using concretely comprising the following steps for the energy-storage system of accumulator regulator control system frequency：
The active power that wind power plant exit bus is exported produces d axles to join with the difference with reference to active power by pi regulator
Examine current signal；
The voltage that wind power plant exit bus is exported produces q axles reference current to believe with the difference of reference voltage by pi regulator
Number；
Based on the d axles reference current signal and the q axles reference current signal, the alternating voltage of the current transformer output is controlled
Amplitude and phase, control the active power of the electric power storage energy-storage system output, so as to regulate and control the output frequency of the power system.
9. a kind of wind-powered electricity generation participates in the control system of power system frequency modulation, it is characterised in that the control system includes rotor kinetic energy
Control module and energy-storage system of accumulator.
10. control system according to claim 9, it is characterised in that also including Wind turbines, wherein,
The rotor kinetic energy control module is inside the Wind turbines；
The Wind turbines are with the energy-storage system of accumulator each by transformers connected in parallel at same bus.
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| CN107394817A (en) * | 2017-08-01 | 2017-11-24 | 华北电力大学 | A kind of wind-powered electricity generation participates in the method and system of power system frequency modulation |
| CN108110776A (en) * | 2017-12-18 | 2018-06-01 | 国网辽宁省电力有限公司经济技术研究院 | Main passive frequency response composite control method |
| CN108493960A (en) * | 2018-04-27 | 2018-09-04 | 中国大唐集团科学技术研究院有限公司华中分公司 | A kind of rule-based energy storage participation wind-powered electricity generation frequency modulation control method |
| CN109193804A (en) * | 2018-10-17 | 2019-01-11 | 河海大学 | The power smooth method of wind electric field blower coordination with the synthesis control based on kinetic energy storage |
| CN110175933A (en) * | 2019-05-29 | 2019-08-27 | 哈尔滨工业大学 | Direct-driving type wind power plant Dynamic Equivalence suitable for frequency modulation control |
| CN111146787A (en) * | 2020-01-20 | 2020-05-12 | 广东电网有限责任公司阳江供电局 | Virtual inertia control method for wind field battery energy storage system |
| CN112152254A (en) * | 2019-06-26 | 2020-12-29 | 北京金风科创风电设备有限公司 | Control method and control system of double-winding converter |
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| CN112994048A (en) * | 2021-05-11 | 2021-06-18 | 国网江西省电力有限公司电力科学研究院 | Double-fed fan primary frequency modulation control method and device considering frequency voltage interaction |
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| CN108110776A (en) * | 2017-12-18 | 2018-06-01 | 国网辽宁省电力有限公司经济技术研究院 | Main passive frequency response composite control method |
| CN108110776B (en) * | 2017-12-18 | 2021-08-06 | 国网辽宁省电力有限公司经济技术研究院 | Active and passive frequency response composite control method |
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| CN111146787B (en) * | 2020-01-20 | 2021-04-09 | 广东电网有限责任公司阳江供电局 | Virtual inertia control method for wind field battery energy storage system |
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| CN112994048A (en) * | 2021-05-11 | 2021-06-18 | 国网江西省电力有限公司电力科学研究院 | Double-fed fan primary frequency modulation control method and device considering frequency voltage interaction |
| CN112994048B (en) * | 2021-05-11 | 2021-09-10 | 国网江西省电力有限公司电力科学研究院 | Double-fed fan primary frequency modulation control method and device considering frequency voltage interaction |
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