CN107546772A - Electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor - Google Patents
Electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor Download PDFInfo
- Publication number
- CN107546772A CN107546772A CN201710865692.XA CN201710865692A CN107546772A CN 107546772 A CN107546772 A CN 107546772A CN 201710865692 A CN201710865692 A CN 201710865692A CN 107546772 A CN107546772 A CN 107546772A
- Authority
- CN
- China
- Prior art keywords
- voltage
- micro
- capacitance sensor
- wind turbines
- mrow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Landscapes
- Control Of Eletrric Generators (AREA)
Abstract
The present invention relates to a kind of electric voltage frequency control method for coordinating of double-fed asynchronous Wind turbines in micro-capacitance sensor, pass through the frequency control module of rotor converter Control, when the micro-capacitance sensor frequency of occurrences changes, virtual inertia link in frequency control module can respond rapidly to f P droop controls links, and system frequency is stable in new point of safes.Controlled by adding additional DFD logic modules voltage in existing rotor converter Control, improve the ability that double-fed wind power generator group provides electric voltage frequency support in micro-capacitance sensor.The method can not only make DFIG voluntarily suppress micro-capacitance sensor voltage fluctuation that its active change is brought, and it can further increase DFIG idle output when causing micro-capacitance sensor voltage more to be prescribed a time limit in droop control, reduce the variation of micro-capacitance sensor, electric voltage frequency control module ensure that DFIG and remaining distributed power source in micro-capacitance sensor power distribution simultaneously, the equity control of micro-capacitance sensor can be realized, improves the electric voltage frequency stability of micro-capacitance sensor.
Description
Technical field
The present invention relates to a kind of micro-capacitance sensor control technology, more particularly to a kind of double-fed asynchronous wind turbine based on droop control
Electric voltage frequency control method for coordinating of the group in micro-capacitance sensor.
Background technology
Double-fed asynchronous (DFIG) Wind turbines are because it has variable speed constant frequency, PQ uneoupled control characteristics, in existing wind-power electricity generation
In by extensive use, wherein DFIG virtual inertia control is studied by extensive expert.DFIG in Wind turbines by drawing
Enter frequency control link, increase active output participation frequency modulation by discharging DFIG rotors kinetic energy when micro-capacitance sensor frequency is mutated.Together
When by Control of decreasing load, in time MPPT running statuses when making DFIG normal works, leave certain power backup and participate in frequency
Primary regulation.It is active for DFIG reactive power/voltage controls, low wind speed interval in being typically distributed about due to wind speed, DFIG Wind turbines
Output is less than rated power, and its stator side has larger idle generating ability, existing to utilize DFIG rotor-sides transverter and net
The reactive power compensation planning of side transverter participates in the control method of system pressure regulating.Wherein wind power plant it is more use for constant voltage control
Pattern, and it is then relatively broad using Q-V droop controls for the Wind turbines in micro-capacitance sensor, and both can respond monitoring point voltage and become
Change, exported by the reactive power for changing Wind turbines accordingly to realize the support to micro-capacitance sensor voltage.
The shortcomings that prior art：
1st, do not account for becoming micro-capacitance sensor voltage fluctuation problem caused by the active exporting change of DFIG Wind turbines under wind speed.
Because actual micro-capacitance sensor is mostly mesolow voltage class, therefore the line impedance ratio of whole network is close to 1, or
Person's whole network is rendered as resistive, therefore the active change of DFIG Wind turbines will cause the larger fluctuation of micro-capacitance sensor voltage, special
It should be more taken seriously under micro-capacitance sensor islet operation when other.Existing DFIG controls focus on virtual inertia control, have ignored it
Own reactive output carries out electricity to the ability of micro-capacitance sensor voltage support by easy configuration reactive-load compensation equipment or energy storage device
The stabilization of pressure, this can not play voltage regulation capability of the DFIG Wind turbines in micro-capacitance sensor, while be added significantly to micro- electricity
Net builds the cost with operation, more limits the access capacity of Wind turbines.Existing DFIG Wind turbines use the sagging controls of V-Q
System is widely used distributed power source control mode, can carry out each distributed electrical by sagging coefficient set in advance
Idle output distribution between source, the equity control of micro-capacitance sensor is formed, strengthen the voltage stabilization and economic benefit of micro-capacitance sensor.But
The intrinsic droop control shortcoming of V-Q droop controls, the DFIG Wind turbines using V-Q droop controls are caused, it is active to its
Micro-capacitance sensor voltage fluctuation inhibition is poor caused by exporting change.
2nd, the Wind turbines using constant voltage control and the idle cooperation of distributed power source in other micro-capacitance sensors are not accounted for
Problem.
In order to suppress the voltage pulsation problem that Wind turbines are brought, DFIG Wind turbines also have using constant voltage control at present
System, but this kind of control method is more applicable is used for wind power plant, and it is changeable for the such network structure of micro-capacitance sensor, internal electric source puts into and cut
Go out frequently, controlled according to constant voltage so that Wind turbines can not enter power distribution with other distributed power sources, form micro-capacitance sensor
Equity control, if Wind turbines hinder off-grid for some reason, the collapse of voltage of micro-capacitance sensor will be caused.
3rd, not the problem of not accounting for using micro-capacitance sensor voltage caused by V-Q droop controls out-of-limit.
When DFIG Wind turbines use V-Q droop controls, output that its is idle will accordingly be adjusted according to sagging coefficient, so by
The out-of-limit problem of micro-capacitance sensor voltage may be caused in too small (or excessive) of setting coefficient, deteriorates the voltage stabilization of micro-capacitance sensor.
The content of the invention
The present invention be directed to the problem of double-fed asynchronous Wind turbines control is present in micro-capacitance sensor, it is proposed that a kind of double-fed asynchronous
Electric voltage frequency control method for coordinating of the Wind turbines in micro-capacitance sensor, overcome the only frequency control of existing double-fed asynchronous Wind turbines
Method processed have ignored voltage support ability of the idle output to micro-capacitance sensor of its own, while not account for the active of Wind turbines
The problem of micro-capacitance sensor voltage caused by exporting change fluctuates, while in order that wind turbine can with it is distributed in other micro-capacitance sensors
Power supply coordinates, and gives full play to its electric voltage frequency enabling capabilities so that micro-capacitance sensor can be further in voltage to frequency stability
Improve, controlled by the voltage added in existing rotor converter Control after improving, (voltage logic is comprehensive by additional DFD
Close and differentiate) module, improve the ability that double-fed wind power generator group provides electric voltage frequency support in micro-capacitance sensor.
The technical scheme is that：A kind of electric voltage frequency of double-fed asynchronous Wind turbines in micro-capacitance sensor coordinates controlling party
Method, wherein double-fed asynchronous Wind turbines active power and frequency control method is：When system occurrence frequency changes, to the system frequency of measurement
fmeasWith a reference value f of settingnIt is compared to make the difference and obtains Δ f, Δ f and fmeasSignal is respectively by virtual in FREQUENCY CONTROL
Inertia controls and f-P droop controls and then obtains active compensation rate Δ P, and with the active input reference of off-load of previous time point
P′optSummation obtains active reference value P nowref, system frequency is stable in new point of safes；
Wherein double-fed asynchronous Wind turbines voltage control method is：
1) when systems are functioning properly, voltage control can adjust DFIG wind-powered electricity generations according to the real-time voltage signal of monitoring point
The reactive power output of unit, suppresses DFIG Wind turbines voltage continued jitters caused by active exporting change；
2) when sudden load change occurs for system, electric voltage frequency control is with other distributed electricals in V-Q droop controls and system
Source is carried out without the distribution of work, the common voltage support for participating in system；
3) when detecting that monitoring point voltage occurs more to prescribe a time limit, the idle output of its own is adjusted, helps voltage to recover to transporting
Within the deviation range of row operation, ensure voltage stabilization, increase logic integral link f and logic integral link d, coordinate former V-Q
Droop control collective effect, the idle output of itself is carried out according to voltage out-of-limit situation and adjusted；
4) the idle output during whole voltage support, calculates according to the active output of double-fed asynchronous Wind turbines and obtains
Reactive power auxiliary service carries out amplitude limit, and on the premise of active output is ensured, maximum plays the idle tune of double-fed asynchronous Wind turbines
Save power.
The double-fed asynchronous Wind turbines active power and frequency control method is specific as follows：
It is by virtual inertia link and the active compensation rate Δ P that f-P droop controls link generates：
Wherein kiFor virtual inertia gain coefficient, kpFor the sagging coefficients of f-P；
The active input reference P ' of FREQUENCY CONTROL load relieving portionoptFor：
P′opt=(1-K%) × Popt
Wherein PoptFor the active reference values of DFIG under MPPT, K% is off-load rate；
The active reference value P of output of FREQUENCY CONTROL partrefFor：
The double-fed asynchronous Wind turbines voltage control method concrete methods of realizing is as follows：
To the system voltage U of measurementmeasWith the control targe voltage U of settingnMake the difference and obtain voltage variety Δ U, Δ
UfFor double-fed asynchronous Wind turbines port voltage fluctuation threshold, Δ UlimFor double-fed asynchronous Wind turbines port voltage offset threshold
Value, the voltage logic comprehensive distinguishing DFD modules in voltage control carry out judging to select corresponding reactive-load compensation mould according to different Δ U
Formula：
When | Δ U |≤| Δ Uf|, judge now micro-capacitance sensor normal operation, but micro-capacitance sensor voltage is because of the active output of Wind turbines
Continued jitters be present with Smaller load switching change in system, integration module f and V-Q is in running order, carries out voltage wave jointly
Dynamic suppression；
When | Δ Uf| ＜ | Δ U |≤| Δ Ulim|, judge that now micro-capacitance sensor has voltage change, now two logic integrals
Module is blocking, and to ensure that Wind turbines coordinate with other distributed power sources, voltage control is only transported with V-Q droop controls
OK, micro-capacitance sensor equity control is formed, improves micro-capacitance sensor stability；
When | Δ U | ＞ | Δ Ulim|, judge that now monitoring point voltage is present out-of-limit, logic integral module d actions, and under V-Q
The idle output for the control collective effect, further increase Wind turbines of hanging down so that micro-capacitance sensor voltage is operated in allowed band；
Entirely the reactive-load compensation amount Δ Q of DFD modules generation is：
Δ Q=Δs Qdroop+ΔQf+ΔQd=kq·ΔU+kf∫ΔUdt+kd∫ΔUdt
Wherein kfFor f integral element gain coefficients, kdFor d integral element gain coefficients；
The idle reference value Q exported accordinglyrefFor：
Qref=Q0+ΔQ
Wherein Q0It is U for monitoring point voltage stabilizationnUnder idle output valve；
The active output reference value P exported by the FREQUENCY CONTROL of Wind turbinesrefCalculate in real time and obtain double-fed asynchronous wind-powered electricity generation
The reactive power auxiliary service Q of unitlim·max、Qlim·min；By the idle reference value Q of voltage control outputrefCompared with it：
Work as Qlim·min≤Qref≤Qlim·max, it is idle output reference value within the scope of reactive power auxiliary service, now export
Qref·mEqual to Qref；
Work as Qlim·max＜ QrefOr Qref＜ Qlim·min, idle output reference value exceeds reactive power auxiliary service scope, now defeated
The Q gone outref·mEqual to Qlim·maxOr Qlim·min。
The beneficial effects of the present invention are：Electric voltage frequency of the double-fed asynchronous Wind turbines of the present invention in micro-capacitance sensor coordinates control
Method processed, DFIG can not only be made voluntarily to suppress its active micro-capacitance sensor voltage brought that changes and fluctuated, and worked as and led in droop control
Cause micro-capacitance sensor voltage more can further increase DFIG idle output in limited time, reduce the variation of micro-capacitance sensor, while voltage
F-P in frequency control module ensure that DFIG Wind turbines and remaining distributed electrical in micro-capacitance sensor with V-Q droop control links
The power distribution in source, the equity control of micro-capacitance sensor can be realized, improve the electric voltage frequency stability of micro-capacitance sensor.
Brief description of the drawings
Fig. 1 electric voltage frequencies provided in an embodiment of the present invention coordinate the FREQUENCY CONTROL schematic diagram of control；
Fig. 2 electric voltage frequencies provided in an embodiment of the present invention coordinate the voltage control schematic diagram of control；
Fig. 3 analogue system structural representations provided in an embodiment of the present invention；
Frequency change schematic diagram in Fig. 4 micro-capacitance sensors provided in an embodiment of the present invention during zero load change；
PCC node voltage change schematic diagrams in Fig. 5 micro-capacitance sensors provided in an embodiment of the present invention during zero load change；Fig. 6
Frequency change schematic diagram during micro-grid load change provided in an embodiment of the present invention；
PCC node voltage change schematic diagrams when Fig. 7 micro-grid loads provided in an embodiment of the present invention change.
Embodiment
The technical program is mainly the control technology of DFIG rotor-side transverters.The specific control targe of rotor-side transverter
It is as follows：
Pass through the frequency control module of rotor converter Control, when the micro-capacitance sensor frequency of occurrences changes, frequency control module
In virtual inertia link can be responded rapidly to f-P droop controls link, there is provided frequency support, finally by the sagging controls of f-P
COEFFICIENT K p processed provides prolonged active output, and system frequency is stable in new point of safes.Wind turbines pass through FREQUENCY CONTROL
Certain frequency support can be provided for system.Controlled by the voltage added in existing rotor converter Control after improving,
By additional DFD modules, the ability that double-fed wind power generator group provides electric voltage frequency support in micro-capacitance sensor is improved.By original
Some electric voltage frequency control modules are improved.DFD is made up of logic integral link f, d and V-Q droop control, including each link
Luo Jie judge modules.
The active power and frequency control module design of specific electric voltage frequency control method for coordinating is as follows：
When system occurrence frequency changes, the FREQUENCY CONTROL part of double-fed asynchronous Wind turbines should have following dynamic mistake
Journey：When system occurrence frequency declines (or rising), virtual inertia controlling unit and the sagging controls of f-P in DFIG FREQUENCY CONTROL
The link processed more corresponding active compensation rate of frequency variation generation, the active output increase of double-fed asynchronous Wind turbines (subtract
It is few), rotating speed decreases (rising), and the off-load rate of Wind turbines reduces (or increase), finally according to sagging coefficient Wind turbines
Stable operation is stable in new operating point, system frequency.
Therefore the design of FREQUENCY CONTROL is as shown in Figure 1：
To the system frequency f of measurementmeasWith a reference value f of settingnIt is compared to make the difference and obtains Δ f, Δ f and fmeasSignal
Active compensation rate Δ P is obtained by the control of virtual inertia in FREQUENCY CONTROL and f-P droop controls respectively, and with it is previous when
Between the active input reference P ' of off-load that putsoptSummation obtains active reference value P nowref, it is specific as follows：
It is by virtual inertia link and the active compensation rate Δ P that f-P droop controls link generates：
Wherein kiFor virtual inertia gain coefficient, kpFor the sagging coefficients of f-P.
The active input reference P ' of FREQUENCY CONTROL load relieving portionoptFor：
P′opt=(1-K%) × Popt
Wherein PoptFor the active reference values of DFIG under MPPT, K% is off-load rate.
The active reference value P of output of FREQUENCY CONTROL partrefFor：
The voltage control module design of specific electric voltage frequency control method for coordinating is as follows：
The voltage control division of double-fed asynchronous Wind turbines point should have following dynamic process：
First, when systems are functioning properly, voltage control can adjust DFIG wind-powered electricity generations according to the real-time voltage signal of monitoring point
The reactive power output of unit, suppresses DFIG Wind turbines voltage continued jitters caused by active exporting change, improves system
The quality of power supply.
2nd, when sudden load change occurs for system, electric voltage frequency control can be with other distributions in V-Q droop controls and system
Formula power supply is carried out without the distribution of work, the common voltage support for participating in system.
3rd, when detecting that monitoring point voltage occurs more to prescribe a time limit, the idle output of its own can be further adjusted, helps electricity
Pressure is recovered to the deviation range of operation operation, ensures voltage stabilization.Increase logic integral link f and logic integral link d,
The idle output of itself is carried out according to voltage out-of-limit situation to adjust.
1st, logic integral link f：
F integral elements generate reactive-load compensation amount according to control point voltage change, and suppressing DFIG fluctuations in wind speed causes to export
Terminal voltage fuctuation within a narrow range, when port of export electro-mechanical wave is less than setting magnitude of a voltage fluctuation, the action of f integral elements, Δ U is voltage pulsation
Amplitude, Δ UfFor voltage pulsation threshold value, it can be set according to practical application, Δ QfFor the reactive-load compensation amount of f links generation.Its
Operation condition is as follows：
2nd, logic integral link d
When using V-Q control after variation it is excessive, higher than setting voltage limits when, d integral elements action, there is provided volume
Outer reactive-load compensation amount, reduce the offset of port voltage so that voltage stabilization is in operation allowed band.ΔUlimFor voltage
Offset threshold value, it can be set according to actual application environment；ΔQdFor the reactive-load compensation amount of d links generation.Its operation condition
It is as follows：
4th, the idle output during whole voltage support, calculated according to the active output of DFIG Wind turbines and obtain nothing
Work(power limit carries out amplitude limit, and on the premise of active output is ensured, maximum plays the Reactive-power control ability of DFIG Wind turbines.
Therefore voltage control module design is as shown in Figure 2：
To the system voltage U of measurementmeasWith the control targe voltage U of settingnMake the difference and obtain voltage variety Δ U, electricity
DFD (voltage logic comprehensive distinguishing) modules in voltage-controlled system carry out judging the corresponding reactive-load compensation pattern of selection according to different Δ U,
Specific workflow is as follows：
When | Δ U |≤| Δ Uf|, judge now micro-capacitance sensor normal operation, but micro-capacitance sensor voltage is because of the active output of Wind turbines
Continued jitters be present with Smaller load switching change in system, integration module f and V-Q is in running order, carries out voltage wave jointly
Dynamic suppression.
When | Δ Uf| ＜ | Δ U |≤| Δ Ulim|, judge that now micro-capacitance sensor has voltage change, now integration module is
Blocking, to ensure that Wind turbines coordinate with other distributed power sources, voltage control is only run with V-Q droop controls, is formed
Micro-capacitance sensor equity control, improves micro-capacitance sensor stability.
When | Δ U | ＞ | Δ Ulim|, judge that now monitoring point voltage is present out-of-limit, integration module d actions, with the sagging controls of V-Q
Collective effect processed, further increase the idle output of Wind turbines so that micro-capacitance sensor voltage is operated in allowed band.
Entirely the reactive-load compensation amount Δ Q of DFD modules generation is：
Δ Q=Δs Qdroop+ΔQf+ΔQd=kq·ΔU+kf∫ΔUdt+kd∫ΔUdt
Wherein kfFor f integral element gain coefficients, kdFor d integral element gain coefficients.
The idle reference value Q exported accordinglyrefFor：
Qref=Q0+ΔQ
Wherein Q0It is U for monitoring point voltage stabilizationnUnder idle output valve.
The active output reference value P exported by the FREQUENCY CONTROL of Wind turbinesrefCalculate in real time and obtain double-fed asynchronous wind-powered electricity generation
The reactive power auxiliary service Q of unitlim·max、Qlim·min；By the idle reference value Q of voltage control outputrefCompared with it：
Work as Qlim·min≤Qref≤Qlim·max, it is idle output reference value within the scope of reactive power auxiliary service, now export
Qref·mEqual to Qref。
Work as Qlim·max＜ QrefOr Qref＜ Qlim·min, idle output reference value exceeds reactive power auxiliary service scope, now defeated
The Q gone outref·mEqual to Qlim·maxOr Qlim·min。
The composition of described micro-capacitance sensor equity control is made up of the droop control of its internal each distributed power source.When
When micro-capacitance sensor has electric voltage frequency change, the active reactive compensation distribution of each distributed power source is by respective f-P and the sagging controls of V-Q
Coefficient k p and kq processed determines that Specific Principles are as follows：
Wherein f1*、U1*And f2*、U2*The respectively reference frequency of different distributions formula power supply, the perunit value of voltage, P1、Q1With
P2、Q2Respectively its active and reactive spare capacity, kp1、kq1And kp2、kq2For corresponding sagging coefficient.
For described control strategy using the active output under FREQUENCY CONTROL as priority condition, FREQUENCY CONTROL is Wind turbines off-load
Changed under control with the control of virtual inertia and f-P droop controls to respond micro-capacitance sensor frequency, adjust its own active output；Protecting
Under conditions of demonstrate,proving active output preferentially, the reactive power auxiliary service of Wind turbines is calculated by real-time active output signal, is protected with this
The idle exporting change under the control of its voltage is demonstrate,proved in allowed band, ensure that using the wind-powered electricity generation under electric voltage frequency control strategy
Unit safety stable operation.
The application effect of the present invention is described in detail with reference to emulation.
By emulating the correctness designed come access control strategy.Built in DIgSILENT/PowerFactory such as figure
Micro-capacitance sensor islet operation model shown in 3.Wherein rated frequency is 50Hz, and photovoltaic cell is replaced by voltage source and PWM converter,
Diesel engine is replaced by synchronous generator.Photovoltaic cell is controlled using PQ, it is assumed that temperature and illumination-constant, power output 2MW；It is negative
Lotus uses constant power load model model, and wherein varying loading is changed in 20s, 40s of emulation respectively, increases 0.5MW+ respectively
1Mvar、0.25MW+1Mvar；Diesel-driven generator uses f-P, Q-V droop control, kp1Value is 40, kq1Value is 10, is set
For balance nodes.DFIG Wind turbines are using change Wind speed model, rated power 5MW, the electric voltage frequency coordination control strategy of use
In major parameter it is as follows：Voltage reference value U0Value is 1.0p.u；Frequency reference value f0Value is 1.0p.u；Idle initial value
Q0Value is 0；Virtual factor of inertia kiValue is 30；kp2Value is 10；kq2Value is 15；Integral element coefficient kf、kdValue is
40。
Situation one, the normal islet operation of micro-capacitance sensor, system frequency occur because of the active exporting change of double-fed asynchronous Wind turbines
Voltage pulsation, then Wind turbines use Different Strategies under micro-capacitance sensor voltage frequency as shown in Figure 4, Figure 5：
Situation two, in 20s, 40s, PCC node loads increase 0.5MW+1Mvar, 0.25MW+ respectively in micro-capacitance sensor
1Mvar, then double-fed asynchronous Wind turbines use Different Strategies under micro-capacitance sensor voltage frequency as shown in Figure 6, Figure 7：
Fig. 4, Fig. 5 illustrate, with the change of wind speed, DFIG active power outputs, which change, make it that voltage to frequency produces ripple in micro-capacitance sensor
It is dynamic, using this paper control method, the ability that double-fed asynchronous Wind turbines itself suppress voltage pulsation is given full play to, has been improved
The voltage stability and the quality of power supply of micro-capacitance sensor.
Fig. 6, Fig. 7 illustrate that, when DFIG coordinates control using electric voltage frequency, double-fed asynchronous Wind turbines being capable of corresponding micro- electricity
The electric voltage frequency change of net, corresponding electric voltage frequency support can be quickly provided, and can entered when micro-capacitance sensor voltage gets over line
One step carries out voltage-regulation, ensure that the electric voltage frequency of micro-capacitance sensor is stable.
Claims (3)
1. electric voltage frequency control method for coordinating of a kind of double-fed asynchronous Wind turbines in micro-capacitance sensor, it is characterised in that wherein double
Presenting asynchronous Wind turbines active power and frequency control method is：When system occurrence frequency changes, to the system frequency f of measurementmeasWith setting
Fixed a reference value fnIt is compared to make the difference and obtains Δ f, Δ f and fmeasSignal is controlled by the virtual inertia in FREQUENCY CONTROL respectively
With f-P droop controls and then obtaining active compensation rate Δ P, and with the active input reference P ' of off-load of previous time pointoptSummation
Obtain active reference value P nowref, system frequency is stable in new point of safes；
Wherein double-fed asynchronous Wind turbines voltage control method is：
1) when systems are functioning properly, voltage control can adjust DFIG Wind turbines according to the real-time voltage signal of monitoring point
Reactive power output, suppress DFIG Wind turbines voltage continued jitters caused by active exporting change；
2) when sudden load change occurs for system, electric voltage frequency control is entered with V-Q droop controls and other distributed power sources in system
Row is without the distribution of work, the common voltage support for participating in system；
3) when detecting that monitoring point voltage occurs more to prescribe a time limit, the idle output of its own is adjusted, helps voltage to recover to operation to transport
Within capable deviation range, ensure voltage stabilization, increase logic integral link f and logic integral link d, coordinate former V-Q sagging
Collective effect is controlled, carrying out the idle output of itself according to voltage out-of-limit situation is adjusted；
4) the idle output during whole voltage support, it is idle that acquisition is calculated according to the active output of double-fed asynchronous Wind turbines
Power limit carries out amplitude limit, and on the premise of active output is ensured, maximum plays the Reactive-power control energy of double-fed asynchronous Wind turbines
Power.
2. electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor according to claim 1, it is special
Sign is that the double-fed asynchronous Wind turbines active power and frequency control method is specific as follows：
It is by virtual inertia link and the active compensation rate Δ P that f-P droop controls link generates：
<mrow>
<mi>&Delta;</mi>
<mi>P</mi>
<mo>=</mo>
<mo>-</mo>
<msub>
<mi>k</mi>
<mi>i</mi>
</msub>
<mo>&times;</mo>
<mfrac>
<mrow>
<mi>d</mi>
<mi>f</mi>
</mrow>
<mrow>
<mi>d</mi>
<mi>t</mi>
</mrow>
</mfrac>
<mo>-</mo>
<msub>
<mi>k</mi>
<mi>p</mi>
</msub>
<mo>&times;</mo>
<mi>&Delta;</mi>
<mi>f</mi>
</mrow>
Wherein kiFor virtual inertia gain coefficient, kpFor the sagging coefficients of f-P；
The active input reference P ' of FREQUENCY CONTROL load relieving portionoptFor：
P′opt=(1-K%) × Popt
Wherein PoptFor the active reference values of DFIG under MPPT, K% is off-load rate；
The active reference value P of output of FREQUENCY CONTROL partrefFor：
<mrow>
<msub>
<mi>P</mi>
<mrow>
<mi>r</mi>
<mi>e</mi>
<mi>f</mi>
</mrow>
</msub>
<mo>=</mo>
<msubsup>
<mi>P</mi>
<mrow>
<mi>o</mi>
<mi>p</mi>
<mi>t</mi>
</mrow>
<mo>&prime;</mo>
</msubsup>
<mo>+</mo>
<mi>&Delta;</mi>
<mi>P</mi>
<mo>=</mo>
<mrow>
<mo>(</mo>
<mn>1</mn>
<mo>-</mo>
<mi>K</mi>
<mi>%</mi>
<mo>)</mo>
</mrow>
<mo>&times;</mo>
<msub>
<mi>P</mi>
<mrow>
<mi>o</mi>
<mi>p</mi>
<mi>t</mi>
</mrow>
</msub>
<mo>-</mo>
<msub>
<mi>k</mi>
<mi>i</mi>
</msub>
<mo>&times;</mo>
<mfrac>
<mrow>
<mi>d</mi>
<mi>f</mi>
</mrow>
<mrow>
<mi>d</mi>
<mi>t</mi>
</mrow>
</mfrac>
<mo>-</mo>
<msub>
<mi>k</mi>
<mi>p</mi>
</msub>
<mo>&times;</mo>
<mi>&Delta;</mi>
<mi>f</mi>
<mo>.</mo>
</mrow>
3. electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines according to claim 1 or claim 2 in micro-capacitance sensor, its
It is characterised by, the double-fed asynchronous Wind turbines voltage control method concrete methods of realizing is as follows：To the system voltage of measurement
UmeasWith the control targe voltage U of settingnMake the difference and obtain voltage variety Δ U, Δ UfFor double-fed asynchronous Wind turbines port
Voltage pulsation threshold value, Δ UlimFor double-fed asynchronous Wind turbines port voltage offset threshold value, the voltage logic in voltage control is comprehensive
Close and differentiate that DFD modules carry out judging to select corresponding reactive-load compensation pattern according to different Δ U：
When | Δ U |≤| Δ Uf|, judge now micro-capacitance sensor normal operation, but micro-capacitance sensor voltage is because the active output of Wind turbines is with being
In system there are continued jitters in the change of Smaller load switching, and integration module f and V-Q is in running order, common progress voltage pulsation
Suppress；
When | Δ Uf| ＜ | Δ U |≤| Δ Ulim|, judge that now micro-capacitance sensor has voltage change, now two logic integral modules are equal
For blocking, to ensure that Wind turbines coordinate with other distributed power sources, voltage control is only run with V-Q droop controls, structure
Controlled into micro-capacitance sensor equity, improve micro-capacitance sensor stability；
When | Δ U | ＞ | Δ Ulim|, judge that now monitoring point voltage is present out-of-limit, logic integral module d actions, with the sagging controls of V-Q
Collective effect processed, further increase the idle output of Wind turbines so that micro-capacitance sensor voltage is operated in allowed band；
Entirely the reactive-load compensation amount Δ Q of DFD modules generation is：
Δ Q=Δs Qdroop+ΔQf+ΔQd=kq·ΔU+kf∫ΔUdt+kd∫ΔUdt
Wherein kfFor f integral element gain coefficients, kdFor d integral element gain coefficients；
The idle reference value Q exported accordinglyrefFor：
Qref=Q0+ΔQ
Wherein Q0It is U for monitoring point voltage stabilizationnUnder idle output valve；
The active output reference value P exported by the FREQUENCY CONTROL of Wind turbinesrefCalculate in real time and obtain double-fed asynchronous Wind turbines
Reactive power auxiliary service Qlim·max、Qlim·min；By the idle reference value Q of voltage control outputrefCompared with it：
Work as Qlim·min≤Qref≤Qlim·max, it is idle output reference value within the scope of reactive power auxiliary service, now export Qref·mDeng
In Qref；
Work as Qlim·max＜ QrefOr Qref＜ Qlim·min, it is idle output reference value exceed reactive power auxiliary service scope, now export
Qref·mEqual to Qlim·maxOr Qlim·min。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710865692.XA CN107546772A (en) | 2017-09-22 | 2017-09-22 | Electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710865692.XA CN107546772A (en) | 2017-09-22 | 2017-09-22 | Electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107546772A true CN107546772A (en) | 2018-01-05 |
Family
ID=60963251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710865692.XA Pending CN107546772A (en) | 2017-09-22 | 2017-09-22 | Electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107546772A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521142A (en) * | 2018-04-11 | 2018-09-11 | 国网陕西省电力公司电力科学研究院 | A kind of Wind turbines primary frequency modulation control method for coordinating |
| CN109245662A (en) * | 2018-10-29 | 2019-01-18 | 中国船舶重工集团海装风电股份有限公司 | The VF control method of pitch motor |
| CN109861251A (en) * | 2019-03-26 | 2019-06-07 | 上海电力学院 | A kind of double-fed fan comprehensive control method for the temporary steady frequency optimization of microgrid |
| CN110854915A (en) * | 2019-12-06 | 2020-02-28 | 华北电力科学研究院有限责任公司 | PQ mode virtual synchronous generator control method and device and droop controller |
| CN113991705A (en) * | 2021-11-05 | 2022-01-28 | 南京工业大学 | Wind power grid-connected system frequency modulation control method with energy storage wind power plant participating in primary frequency modulation control |
| WO2023087311A1 (en) * | 2021-11-19 | 2023-05-25 | 中国电力科学研究院有限公司 | Method for determining capacity of energy storage apparatus for new energy support machine, and new energy support machine |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741096A (en) * | 2009-12-22 | 2010-06-16 | 浙江大学 | Delayless control method of rotor current of grid-connection, speed-change and constant-frequency double-fed induction wind driven generator |
| CN102013698A (en) * | 2010-10-22 | 2011-04-13 | 邵诗逸 | Novel control method of double-feed wind-driven generator converter |
| CN103795089A (en) * | 2013-12-12 | 2014-05-14 | 国家电网公司 | Over-speed and variable pitch coordination-based variable speed wind turbine generator set primary frequency modulation method |
-
2017
- 2017-09-22 CN CN201710865692.XA patent/CN107546772A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101741096A (en) * | 2009-12-22 | 2010-06-16 | 浙江大学 | Delayless control method of rotor current of grid-connection, speed-change and constant-frequency double-fed induction wind driven generator |
| CN102013698A (en) * | 2010-10-22 | 2011-04-13 | 邵诗逸 | Novel control method of double-feed wind-driven generator converter |
| CN103795089A (en) * | 2013-12-12 | 2014-05-14 | 国家电网公司 | Over-speed and variable pitch coordination-based variable speed wind turbine generator set primary frequency modulation method |
Non-Patent Citations (1)
| Title |
|---|
| 赵晶晶等: "变风速下双馈异步风机在微电网中的电压频率协调控制", 《可再生能源》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108521142A (en) * | 2018-04-11 | 2018-09-11 | 国网陕西省电力公司电力科学研究院 | A kind of Wind turbines primary frequency modulation control method for coordinating |
| CN109245662A (en) * | 2018-10-29 | 2019-01-18 | 中国船舶重工集团海装风电股份有限公司 | The VF control method of pitch motor |
| CN109245662B (en) * | 2018-10-29 | 2021-08-31 | 中国船舶重工集团海装风电股份有限公司 | VF control method of variable pitch motor |
| CN109861251A (en) * | 2019-03-26 | 2019-06-07 | 上海电力学院 | A kind of double-fed fan comprehensive control method for the temporary steady frequency optimization of microgrid |
| CN110854915A (en) * | 2019-12-06 | 2020-02-28 | 华北电力科学研究院有限责任公司 | PQ mode virtual synchronous generator control method and device and droop controller |
| CN110854915B (en) * | 2019-12-06 | 2022-02-01 | 华北电力科学研究院有限责任公司 | PQ mode virtual synchronous generator control method and device and droop controller |
| CN113991705A (en) * | 2021-11-05 | 2022-01-28 | 南京工业大学 | Wind power grid-connected system frequency modulation control method with energy storage wind power plant participating in primary frequency modulation control |
| CN113991705B (en) * | 2021-11-05 | 2024-05-24 | 南京工业大学 | Wind power grid-connected system frequency modulation control method with energy storage wind power plant participating in primary frequency modulation control |
| WO2023087311A1 (en) * | 2021-11-19 | 2023-05-25 | 中国电力科学研究院有限公司 | Method for determining capacity of energy storage apparatus for new energy support machine, and new energy support machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110970933B (en) | Active support control-based virtual inertia compensation method for light-storage combined power generation system | |
| CN107546772A (en) | Electric voltage frequency control method for coordinating of the double-fed asynchronous Wind turbines in micro-capacitance sensor | |
| CN107294116A (en) | A kind of multiple domain power system load control method for frequency | |
| CN105162167B (en) | A kind of wind-light storage microgrid frequency modulation method based on adaptive droop control | |
| CN110912158A (en) | Multi-terminal flexible direct-current power transmission system frequency stability control method with wind power participating in frequency modulation | |
| CN107453410A (en) | The double-fed blower fan of load disturbance participates in wind bavin microgrid frequency modulation control method | |
| CN106786796A (en) | A kind of wind-powered electricity generation participates in the control method and its system of power system frequency modulation | |
| CN106374498B (en) | A kind of micro-capacitance sensor tidal current computing method considering the control of secondary voltage frequency | |
| CN104037777B (en) | Distribution Static Compensator suppresses the method for voltage pulsation and harmonic distortion | |
| CN116845924B (en) | Grid-structured wind power plant voltage source control method based on phase angle self-generation strategy | |
| CN107846030A (en) | A kind of double-fed fan motor field frequencies range control method for considering optimal rotor inertia kinetic energy | |
| CN110611332B (en) | Energy storage device of offshore wind power system and control method thereof | |
| Rosyadi et al. | Stabilization of fixed speed wind generator by using variable speed PM wind generator in multi-machine power system | |
| CN115800296B (en) | Voltage frequency collaborative supporting method for open sea wind power through VSC-MTDC grid-connected system | |
| CN116937546A (en) | Wind storage grid connection considered power grid low-frequency oscillation suppression method and system | |
| CN115021314A (en) | Double-fed fan combined control strategy for enhancing system voltage stability | |
| Sarrias et al. | Supervisory control system for DFIG wind turbine with energy storage system based on battery | |
| CN114204860A (en) | Three-phase inverter control method and system based on virtual synchronous power generation technology | |
| Xu et al. | A New Adaptive Frequency Control Strategy for VSG Based on Grid Forming Converter of Renewable Energy | |
| Gumilar et al. | PV and QV Curve Analysis of Four Types Wind Power Plants at Battery Charging Station | |
| Yin et al. | Research on Voltage Control Strategy of Point of Common Coupling of Microgrid with PV and Battery | |
| Liu et al. | A frequency control strategy for offshore wind power based on electrochemical energy storage | |
| Akram et al. | Dynamic derivative–droop control for supercapacitor synthetic inertial support | |
| CN115483691B (en) | Control method and device for energy storage coordination floating type wind turbine generator | |
| Gao et al. | Analysis of the Electrical Energy Quality and Stability of the Complementary Wind-Water Power Generation System |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180105 |