CN105207234B - A kind of Wind turbines powerless control method for carrying out encouraging effect by force - Google Patents
A kind of Wind turbines powerless control method for carrying out encouraging effect by force Download PDFInfo
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- CN105207234B CN105207234B CN201510725169.8A CN201510725169A CN105207234B CN 105207234 B CN105207234 B CN 105207234B CN 201510725169 A CN201510725169 A CN 201510725169A CN 105207234 B CN105207234 B CN 105207234B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000002143 encouraging effect Effects 0.000 title claims abstract description 9
- 238000010248 power generation Methods 0.000 claims abstract description 10
- 230000006641 stabilisation Effects 0.000 claims description 6
- 238000011105 stabilization Methods 0.000 claims description 6
- 230000006978 adaptation Effects 0.000 abstract description 4
- 230000003111 delayed effect Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000005284 excitation Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention discloses a kind of Wind turbines powerless control method for carrying out encouraging effect by force, the Wind turbines using the current transformer with field-forcing function are controlled, including：(1) Wind turbines master control system is encouraged by force enable and opened；(2) wind power generation set system actual voltage value U is judged, when U is less than low-voltage constrained current operation threshold value UlowOr more than high voltage constrained current operation threshold value UhighAfterwards, field-forcing function is opened, Wind turbines enter encourages pattern by force；If U is less than Ulow, then carry out encouraging compensation by force in advance；If U is more than Uhigh, then carry out delayed encouraging compensation by force；When U is between UlowBetween 90% wind power generation set system rated voltage or UhighWhen between 110% wind power generation set system rated voltage, then compensated according to normal reactive power support.The present invention can strengthen the voltage adaptation of Wind turbines, can be run in bigger voltage range, carry out stronger supporting role to power network during system voltage failure, be particularly suitable for use in Double-feed wind power unit.
Description
Technical field
The present invention relates to wind-powered electricity generation control field, more particularly to a kind of idle control of Wind turbines for carrying out encouraging effect by force
Method.
Background technology
The current wind power generating set capacity that Converter Capacity is typically all less than or equal to unit, or it is slightly higher than wind
Capacity needed for group of motors.And double-fed fan motor unit is typically all less than unit total capacity, double-fed fan motor machine with Converter Capacity
Group operationally, if to realize no-power compensation function, mainly by current transformer control generating set carry out reactive-load compensation and
Net side current transformer reactive-load compensation；When Wind turbines are in non-operating state, compensation capacity will be held by net side current transformer itself
Amount is determined.
As large-scale wind power unit accesses power system, new challenge is brought to electric power netting safe running, and wind turbine
The randomness of group operation causes whole line voltage to produce fluctuation, and to solve the problem, it is necessary to have reactive-load compensation dress for wind power plant
Put.New Wind turbines can be run as reactive-load compensation equipment in itself, can carry out reactive power support effect.Conventional
Using field level reactive-load compensation equipment more than wind power plant, such as capacitive compensator, SVG, SVC, the size of reactive-load compensation investment depends on
In the capacity of Reactive Compensation in Wind Farm equipment.If Wind turbines possess good no-power compensation function, then field can be reduced
The capacity of level reactive-load compensation equipment, so as to reduce wind power plant investment.The reactive power compensation planning of current Wind turbines can in stable state
A certain amount of idle function is exported with stable.When Wind turbines, which are in electric network fault voltage, to be run, Wind turbines enter to power network
Row Quick reactive-load compensation, now power network need Wind turbines as much as possible to send idle to support line voltage.And current wind
Motor pool-size is limited with control algolithm, can only carry out part support, and ordinary circumstance reactive-load compensation electric current is 100% specified electricity
Stream, it is impossible to carry out more powerful reactive power support.
Chinese utility model patent CN202772580U (the set end voltage regulating system of double-fed fan motor unit reactive power support),
The patent carries out voltage judgement, using Wind turbines Reactive-power control, so as to be controlled to voltage by control method.Reach
The technique effect being controlled within the specific limits to Wind turbines set end voltage, but it is to be related to conventional type wind turbine
Group set end voltage control, does not carry out grading control when more than conventional Wind turbines reactive power compensation planning.
Chinese invention patent CN102496938A (the determination methods and dress of reactive regulation capacity in operation process of wind generation set
Put), the patent assesses the intrinsic reactive power pondage of double-fed blower fan group according to the constraint of current transformer, stator and rotor current
Scope；Steady stability nargin is determined, the reactive power regulation is corrected under the constraints of the steady stability nargin and is held
The scope of amount；Determination for double-fed fan motor unit reactive power pondage provides more comprehensive and accurate appraisal procedure；But
It is simply determined to Wind turbines Reactive-power control capacity, belongs to a kind of method for calculating reactive power capability, not a kind of control
The specific method of Wind turbines reactive power support.
As can be seen here, above-mentioned existing Wind turbines powerless control method, it is clear that still suffered from inconvenience and defect, and urgently
It is further improved.How to found a kind of voltage adaptation that can make Wind turbines strengthens, can be in bigger voltage model
Interior operation is enclosed, the Wind turbines powerless control method of stronger supporting role is carried out to power network during system voltage failure, into
The target that need to improve for current industry.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of Wind turbines powerless control method for carrying out encouraging effect by force,
So that the voltage adaptation enhancing of Wind turbines, can run in bigger voltage range, to electricity during system voltage failure
Net carries out stronger supporting role.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：
A kind of Wind turbines powerless control method for carrying out encouraging effect by force, to using the current transformer with field-forcing function
Wind turbines are controlled, including：
(1) Wind turbines master control system is encouraged by force enable and opened；
(2) wind power generation set system actual voltage value U is judged, when actual voltage value U is less than low-voltage constrained current operation
Threshold value UlowOr more than high voltage constrained current operation threshold value UhighAfterwards, field-forcing function is opened, Wind turbines enter encourages pattern by force；Ulow
With UhighAbility setting can be encouraged by force according to unit itself；
If actual voltage value U is less than Ulow, then carry out encouraging compensation by force in advance；If actual voltage value U is more than Uhigh, then
Progress is delayed to encourage compensation by force；
When actual voltage value U is between UlowBetween 90% wind power generation set system rated voltage or UhighWith 110% wind-powered electricity generation
When between machine set system rated voltage, then compensated according to normal reactive power support.
As a modification of the present invention, strong in the step (2) encourages pattern, according to actual voltage value U and low electricity
Pressure encourages operation threshold UlowThe difference DELTA u compared size carries out calculating and encouraging output valve by force by pi regulator, the value with normally
Offset Q- NormallyReactive-load compensation set-point Q is used as after summation- Qiang LiWind turbines are controlled to carry out reactive-load compensation output, afterwards according to reality
Border magnitude of voltage feedback is adjusted encourages degree by force so that voltage stabilization is within allowed band；Strong in the step (2) encourages mould
In formula, according to actual voltage value U and high voltage constrained current operation threshold value UhighThe difference DELTA u compared size is entered by pi regulator
Row calculates and encourages output valve by force, the value and normal compensation values Q+ NormallyReactive-load compensation set-point Q is used as after summation+ Qiang LiControl Wind turbines
Reactive-load compensation output is carried out, is adjusted according to actual voltage value feedback encourages degree by force afterwards so that voltage stabilization is allowing model
Within enclosing.
Amplitude limiting controller is provided with after pi regulator, amplitude limitation is carried out to the strong output valve of encouraging calculated, then entered again
The described summation of row.
The Wind turbines are Double-feed wind power unit.
After adopting the above technical scheme, the present invention at least has the advantages that：
1st, the control method can strengthen Wind turbines reactive power compensation planning, although add the throwing of Wind turbines fund
Enter, but wind power plant level reactive apparatus capacity can be reduced, reduce field level reactive apparatus fund input.
2nd, the control method can be turned on and off Wind turbines field-forcing function by encouraging enable by force.
3rd, threshold voltage U in the control methodhighWith UlowSetting, can be adjusted according to different situations, so as to set
Determine field-forcing function and open thresholding.
4th, the control method can control the output set-point of Wind turbines reactive-load compensation, and type wind turbine is encouraged by force so as to realize
The strong control for encouraging process of group.
5th, it can strengthen the voltage adaptation of Wind turbines after control method application so that Wind turbines can be more
Run in big voltage range.
6th, after the control method application Wind turbines can be made to carry out stronger branch to power network during system voltage failure
Support is acted on, and improves the grid-connected performance of Wind turbines.
7th, this method goes for that the Wind turbines of Reactive-power control can be carried out, but Double-feed wind power unit lifting effect is more
Plus substantially.
Brief description of the drawings
Above-mentioned is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention, below
With reference to accompanying drawing, the present invention is described in further detail with embodiment.
Fig. 1 is wind power generation set system voltage segmentation reactive-load compensation administrative division map；
Fig. 2 is Wind turbines field-forcing function logic unlocking condition figure；
Fig. 3 is that Wind turbines encourage by force idle set-point calculating figure under pattern.
Embodiment
The present invention method be based on conventional wind power unit converter is changed into can carry out field-forcing function current transformer (should
The capacity of current transformer is more than conventional Double-feed wind power unit), control Wind turbines to be encouraged by force by the idle control algolithm of master control
Function, realizes enhancing Wind turbines reactive power compensation planning.Field-forcing function includes encouraging enable by force, encouraging judgement by force, encourage control design case by force
And idle size is calculated during encouraging by force.Wherein, by force encourage enable be exactly field-forcing function software switch, it is necessary to the used time unlatching,
The used time does not close.
Illustrated below by taking Double-feed wind power unit as an example.
With reference to shown in Fig. 1, Fig. 2, the Double-feed wind power unit powerless control method for encourage by force effect of the present embodiment,
Including：Encouraged first in Wind turbines master control system after enable by force, Wind turbines allow to carry out field-forcing function.Examined afterwards by voltage
Survey device to judge wind power generation set system actual voltage value U, when actual voltage value U is less than low-voltage constrained current operation threshold value
UlowOr more than high voltage constrained current operation threshold value UhighAfterwards, field-forcing function is opened, Wind turbines enter encourages pattern by force.Such as fruit
Border magnitude of voltage U is less than Ulow, then carry out encouraging compensation by force in advance, there is lifting effect to voltage；If actual voltage value U is greater than
Uhigh, then carry out it is delayed encourage compensation by force, effect is dragged down to voltage.When actual voltage value U is between UlowWith 90% rated voltage it
Between or UhighWhen between 110% rated voltage, then compensated according to normal reactive power support.
Wherein UlowWith UhighValue can require to be set according to different, generally require and carried out according to actual electric network parameter
Set, such as when voltage is higher than 1.3 times, carry out 1.5 times of delayed reactive-load compensation to reduce voltage.Wind turbines are normally idle
Support is carried out according to relevant national standard, typically carries out idle output with the ratio of Voltage Drop degree, and reactive-load compensation is maximum
It is worth for the rated current of Wind turbines 100%.
With reference to shown in Fig. 3, in pattern is encouraged by force, according to actual voltage value U and low-voltage constrained current operation threshold value UlowCompare
Difference DELTA u size by pi regulator calculate encouraging output valve by force, the value and normal compensation values Q- NormallyNothing is used as after summation
Work(compensation set-point Q- Qiang LiControl Wind turbines to carry out reactive-load compensation output, be adjusted encourage by force according to virtual voltage feedback afterwards
Degree so that voltage stabilization is within allowed band；Wind turbines reactive-load compensation set-point Q when can similarly draw high voltage operation+ Qiang Li, it is specially：According to actual voltage value U and high voltage constrained current operation threshold value UhighThe difference DELTA u compared size is adjusted by PI
Section device calculate encouraging output valve by force, the value and normal compensation values Q+ NormallyReactive-load compensation set-point Q is used as after summation+ Qiang LiControl wind
Group of motors carries out reactive-load compensation output, is adjusted according to actual voltage value feedback encourages degree by force afterwards so that voltage stabilization exists
Within allowed band.
Amplitude limiting controller is provided with after pi regulator, to calculate it is strong encourage output valve and limit, prevent from exceeding controllable
Scope.After line voltage recovers, it is also to be adjusted according to voltage change, normal voltage state is returned to afterwards, whole electricity
Press adjustment process to need to control within Wind turbines allowed band, otherwise may cause dependent failure and cause voltage wave
It is dynamic.
In summary, the present invention is the method that a kind of strong master control control for encouraging Wind turbines is encouraged by force, and Wind turbines are encouraged by force
The size of ability depends on the capacity of magnet excitation current transformer and the control method of current transformer.The technical scheme can strengthen after implementing
Wind turbines control reactive power capability, can be by without power control when wind power generation set system voltage exceedes relevant national standard 1.1pu.
System carries out voltage-regulation, when voltage continues to rise, encourages threshold voltage U by force more than Wind turbineshighWhen, Wind turbines can enter
Row magnet excitation function, injects bigger reactive current and carries out voltage-regulation, makes voltage control within limits.Work as wind turbine
When group voltage declines, capacitive reactive power electric current, booster tension can be injected to system.Threshold value electricity is encouraged by force when voltage continues to decrease beyond
Press UlowWhen, magnet excitation function will be carried out, inject bigger reactive current and carry out voltage-regulation, stronger support is played to power network
Function.
The above-mentioned powerless control method of the present invention is controlled after using magnet excitation current transformer to double-fed fan motor unit, can be with
Strengthen the ability that Wind turbines carry out reactive-load compensation in voltage pulsation to system, carry out idle mend to system in voltage pulsation
The ability repaid can increase to 150% rated current even more high by being 100% rated current to the maximum in the prior art.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, this
Art personnel make a little simple modification, equivalent variations or modification using the technology contents of the disclosure above, all fall within this hair
In bright protection domain.
Claims (3)
1. a kind of Wind turbines powerless control method for carrying out encouraging effect by force, it is characterised in that to using with field-forcing function
The Wind turbines of current transformer be controlled, including：
(1) Wind turbines master control system is encouraged by force enable and opened；
(2) wind power generation set system actual voltage value U is judged, when actual voltage value U is less than low-voltage constrained current operation threshold value
UlowOr more than high voltage constrained current operation threshold value UhighAfterwards, field-forcing function is opened, Wind turbines enter encourages pattern by force；
If actual voltage value U is less than Ulow, then carry out encouraging compensation by force in advance；If actual voltage value U is more than Uhigh, then carry out stagnant
Encourage compensation by force afterwards；
When actual voltage value U is between UlowBetween 90% wind power generation set system rated voltage or UhighWith 110% Wind turbines
When between system nominal voltage, then compensated according to normal reactive power support；
Wherein, it is described it is strong encourage pattern, according to actual voltage value U and low-voltage constrained current operation threshold value UlowThe difference compared
Δ u size by pi regulator calculate encouraging output valve by force, the value and normal compensation values Q- NormallyMended after summation as idle
Repay set-point Q- Qiang LiControl Wind turbines to carry out reactive-load compensation output, be adjusted according to actual voltage value feedback encourage journey by force afterwards
Degree so that voltage stabilization is within allowed band；
It is described it is strong encourage pattern, according to actual voltage value U and high voltage constrained current operation threshold value UhighThe difference DELTA u's compared
Size by pi regulator calculate encouraging output valve by force, the value and normal compensation values Q+ NormallyIt is given as reactive-load compensation after summation
Value Q+ Qiang LiControl Wind turbines to carry out reactive-load compensation output, be adjusted according to actual voltage value feedback encourage degree by force afterwards, made
Voltage stabilization is obtained within allowed band.
2. the Wind turbines powerless control method according to claim 1 for carrying out encouraging effect by force, it is characterised in that in PI
Amplitude limiting controller is provided with after adjuster, amplitude limitation is carried out to the strong output valve of encouraging calculated, described summation is then carried out again.
3. the Wind turbines powerless control method according to claim 1 or 2 for carrying out encouraging effect by force, it is characterised in that
The Wind turbines are Double-feed wind power unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510725169.8A CN105207234B (en) | 2015-10-30 | 2015-10-30 | A kind of Wind turbines powerless control method for carrying out encouraging effect by force |
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| CN201510725169.8A CN105207234B (en) | 2015-10-30 | 2015-10-30 | A kind of Wind turbines powerless control method for carrying out encouraging effect by force |
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| CN105207234A CN105207234A (en) | 2015-12-30 |
| CN105207234B true CN105207234B (en) | 2017-09-29 |
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| CN113922428A (en) * | 2021-09-28 | 2022-01-11 | 重庆海装风电工程技术有限公司 | Reactive output control method and system of wind generating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102102631B (en) * | 2011-03-22 | 2012-08-22 | 国电联合动力技术有限公司 | Running control method for wind generating set with gear box speed regulation front end |
| CN102155356B (en) * | 2011-03-22 | 2013-03-06 | 国电联合动力技术有限公司 | Method for controlling running of wind generating set based on speed-regulating front end of electromagnetic coupler |
| CN202772580U (en) * | 2011-10-17 | 2013-03-06 | 国电联合动力技术有限公司 | Generator-side voltage regulating system based on reactive power support and used for double-fed wind turbine generator |
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