CN102769293A - Reactive power regulation method for fans in wind power farm under remote-control failure condition - Google Patents
Reactive power regulation method for fans in wind power farm under remote-control failure condition Download PDFInfo
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- CN102769293A CN102769293A CN2012102655831A CN201210265583A CN102769293A CN 102769293 A CN102769293 A CN 102769293A CN 2012102655831 A CN2012102655831 A CN 2012102655831A CN 201210265583 A CN201210265583 A CN 201210265583A CN 102769293 A CN102769293 A CN 102769293A
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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 reactive power regulation method for fans in a wind power farm under remote-control failure condition. The reactive power regulation method comprises a judgment mechanism of remote-control faliures, a conversion mechanism of a remote-control failure occurance trigger remote control mode and a one-machine mode, and a calling mechanism of a one-machine reactive power regulation mode, which are all triggered to be executed according to a certain time order in sequence, wherein the one-machine reactive power regulation mode is as follows: setting an active power-reactive power relationship curve of each fan in the wind power farm; and performing one-machine reactive power regulation according to change rules of the curve, wherein the curve is obtained by analyzing long-time operation record data of one fan in a whole regulation mode under a normal remote-control state. The reactive power regulation method has a good reactive power supporting capability in a remote-control failure state, and stablility of the bus voltage of the wind power farm under a remote-control failure condition can be guaranteed and a stable power grid is maintained.
Description
Technical field
The present invention relates to idle control method field, particularly, the idle control method of blower fan when relating to a kind of wind energy turbine set controlling fault far away.
Background technology
According to the preliminary statistics, the newly-increased wind-powered electricity generation installed capacity of China in 2011 is near 1,800 ten thousand kilowatts, and total installation of generating capacity reaches 6,500 ten thousand kilowatts, and China has been wind power equipment manufacturing big country and the maximum country of wind-powered electricity generation installed capacity in the world, becomes genuine wind-powered electricity generation big country.Continuous increase along with the ratio of wind-powered electricity generation in net capacity; This is not only objectively requiring wind turbine generator when electrical network breaks down, idle support can be provided; The quality of power supply, voltage problem have also occurred, and large-scale wind-powered electricity generation power supply causes problems such as electrical network unsteadiness.And the lack of uniformity that China wind-resources distributes makes China propose higher requirement to the quality of power supply of blower fan with to the idle support of electrical network.National grid is issued in formal " wind energy turbine set inserts the power system technology standard " and mentioned in the relevant wind energy turbine set reactive power compensation regulation at the beginning of China 2012: " wind energy turbine set will make full use of the reactive capability and the regulating power thereof of wind-powered electricity generation unit; When the reactive capability of wind-powered electricity generation unit can not satisfy system voltage adjusting needs, should concentrate the reactive power compensator that installs suitable capacity additional in wind energy turbine set, install dynamic reactive compensation device in case of necessity additional." and reactive capability also stipulate.
Existing electrical network requires wind energy turbine set configuration reactive power compensator in order to improve the ability that is incorporated into the power networks, and the most effectively reactive power compensator is SVG at present.The wind-powered electricity generation unit itself has the reactive power regulating power in the wind energy turbine set; Related scientific research mechanism, big-and-middle universities and colleges and wind-powered electricity generation manufacturing enterprise at home; Research majority to utilizing the wind-powered electricity generation unit to regulate the wind energy turbine set reactive power still also rests on the test simulation stage, and the real system that is applied in actual wind field also seldom.
Wind energy turbine set utilizes the wind-powered electricity generation unit to carry out whole idle adjusting; The separate unit blower fan is as the element part of regulatory function; To put in order field control as target; So just having formed with whole the idle or point voltage stability characteristic (quality) that is incorporated into the power networks is overall controlled target, and the performance blower fan is as the regulating action of reactive source under blower fan self performance characteristic condition.
Under the existing pattern, carry out idle adjusting with blower fan as reactive source and have following defective and deficiency, the idle adjusting of wind energy turbine set is to be based upon original optical fiber ring network communication basis normally, the idle fan-out capability of allocating all blower fans.Controlling fault far away: crash or when the wind field optical fiber ring network communication failure like central control server; The idle adjusting of blower fan self will lose whole adjusting target; The unbalance of idle allotment will cause the fluctuation of wind farm grid-connected voltage or cause unnecessary vibration, even cause the collapse of wind energy turbine set network system.
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, the idle control method of blower fan when a kind of wind energy turbine set controlling fault far away is provided can guarantee the stable of under controlling fault condition far away wind energy turbine set busbar voltage, keeps the stable of electrical network.
To achieve these goals, the present invention adopts following technical scheme:
The idle control method of blower fan during a kind of wind energy turbine set controlling fault far away; The call-by mechanism of the adjusting pattern that comprises that the changing the mechanism of control far away and single cpu mode takes place to trigger for the judgment mechanism of controlling fault far away, controlling fault far away, unit is idle, each machine-processed execution triggers under the regular hour order successively; Wherein, the idle adjusting pattern of unit is: set every separate unit blower fan active power-reactive power relation curve in the wind energy turbine set; Changing Pattern according to this curve carries out the idle adjusting of unit; Wherein, every separate unit blower fan active power-reactive power relation curve is that just often blower fan is under whole field control pattern according to control far away, and the long-term log data analysis of unit obtains.
Further, the judgment mechanism of said controlling fault far away contains the software handshake mechanism of controlling fault Rule of judgment far away and middle control and blower fan.
Further, said every separate unit blower fan active power-reactive power relation curve, its transverse axis is a blower fan active power, the longitudinal axis is the blower fan reactive power; Obtaining of curve at first is to obtain OFFSET to pass through an O '; Said O ' region is to pass through the zone in the special active power of unit, and perceptual idle, all casees that said O ' moves for wind electric field blower become and the used perception of main transformer is idle and the capacitive reactive power balance point of wind field circuit self; When blower fan active power is lower than under the following value condition of O ', it is negative value that blower fan is exported idle value, and promptly blower fan is according to curvilinear motion rule output lagging reactive power; When blower fan active power is higher than under the above value condition of O ', blower fan export idle value on the occasion of, promptly blower fan is according to curvilinear motion rule output capacitive reactive power.
Further, said every separate unit blower fan active power-reactive power relation curve is divided into a plurality of variation sections.
The present invention is owing to take above technical scheme, and it has the following advantages:
1, since the present invention on the basis of traditional idle adjusting of wind energy turbine set; When having considered controlling fault far away; The evil that the separate unit blower fan is idle can not be allocated is situation slightly; Therefore avoiding that blower fan is idle under the controlling fault state far away maybe be to the wind field electrical network, the adverse effect that other equipment of wind field reactive-load compensation equipment and transformer station bring, in wind energy turbine set controlling fault generation far away in the clearing time of fault section; It is in a basic balance with allotment that the wind-powered electricity generation unit can be kept the wind energy turbine set reactive requirement, satisfies the requirement of the idle adjusting target error of wind energy turbine set.
2, owing to be a software approach, therefore be not limited to certain controller or blower fan main control device, also be not limited to a certain specific software programming environment.The versatility of this method goes for blower fan manufacturing software and hardware different different condition and environment.
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
Description of drawings
The curve chart of Fig. 1 idle control method of blower fan during for wind energy turbine set of the present invention controlling fault far away.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
The idle control method of blower fan during a kind of wind energy turbine set of the present invention controlling fault far away; The call-by mechanism of the adjusting pattern that comprises that the changing the mechanism of control far away and single cpu mode takes place to trigger for the judgment mechanism of controlling fault far away, controlling fault far away, unit is idle, the judgment mechanism of said controlling fault far away contain controlling fault Rule of judgment far away and in the software handshake mechanism of control and blower fan; It is to be used for the idle adjusting fluctuation of safeguards system that said controlling fault far away causes control far away and changing the mechanism of single cpu mode; The call-by mechanism of adjusting pattern that said unit is idle is the realization of the idle adjusting of concrete unit, and each machine-processed execution triggers under the regular hour order successively.
Wherein, the method for the concrete idle adjusting of unit is following:
As shown in Figure 1, set every separate unit blower fan active power-reactive power relation curve in the wind energy turbine set, this curve is divided into four sections (can be more), and they are: A '-BB ' curve, BB '-O ' curve, O '-CC ' curve and CC '-DD ' curve.Wherein, transverse axis is that blower fan is meritorious, and the longitudinal axis is that blower fan is idle.Participate at the wind-powered electricity generation unit under the situation of the idle adjusting of wind energy turbine set, the wind-powered electricity generation unit needn't ensure the power factor of unit.Obtaining of curve at first is to obtain OFFSET to pass through an O '; Said O ' region is to pass through the zone in the special active power of unit; Be when blower fan active power arrives O ' the some left and right sides; The wind energy turbine set integrated demand can be self-sufficient, and perceptual idle, all casees of wind electric field blower operation become and the used perception of main transformer is idle and the capacitive reactive power balance point of wind field circuit self.Do the adjustment that deviates according to blower fan at different circuits of wind field and different geographic wind regime in that reactive power equilibrium point longitudinal axis blower fan is idle.
The meritorious P of blower fan is lower than under the following value condition of O ', and it is negative value that blower fan is exported idle value, i.e. blower fan output lagging reactive power.Blower fan active power of output capacitive reactive power on the wind energy turbine set circuit in OO ' section is in state more than needed, wherein in active power BO ' scope, carries out idle output according to the constant power factor blower fan; In the OB stage, blower fan output is according to parabolic output, and concrete functional relation wind turbine is done the adjustment that deviates at different circuits of wind field and different geographic wind regime.
The meritorious P of blower fan is higher than under the above value condition of O ', blower fan export idle value on the occasion of, promptly blower fan is exported capacitive reactive power.Blower fan active power of output capacitive reactive power on the wind energy turbine set circuit in DO ' section is in not enough state, wherein in active power CO ' scope, carries out idle output according to the constant power factor blower fan; In the DC stage, blower fan output is according to parabolic output, and concrete functional relation wind turbine is done the adjustment that deviates at different circuits of wind field and different geographic wind regime.
When the present invention works; Every separate unit blower fan active power-reactive power curve setting relation curve in the wind field; Be far to control log data analysis long-term under the normal condition according to wind energy turbine set to obtain; Be with reference to blower fan unit service data under whole field control pattern, carry out the conclusion that draws on the mathematical analysis basis.Wind turbine is meritorious-and idle curve setting all is not quite similar; All variant because of the position and the blower fan geographic location wind regime of the electric topological diagram of wind turbine place wind field, the wind-powered electricity generation machine carries out idle output according to this method and can control in the idle 5% up-down error scope that is stabilized in set point in whole wind electric field main transformer high-pressure side.
Among above-mentioned each embodiment, the parameter of curve of each segmentation, number of fragments, blower fan is idle and meritorious maximum, on the basis of technical scheme of the present invention, to change and the modification that individual parameters is carried out, should not get rid of outside protection scope of the present invention.
Claims (4)
1. the idle control method of blower fan during wind energy turbine set controlling fault far away; It is characterized in that; The call-by mechanism of the adjusting pattern that comprises that the changing the mechanism of control far away and single cpu mode takes place to trigger for the judgment mechanism of controlling fault far away, controlling fault far away, unit is idle, each machine-processed execution triggers under the regular hour order successively;
Wherein, the idle adjusting pattern of unit is: set every separate unit blower fan active power-reactive power relation curve in the wind energy turbine set; Changing Pattern according to this curve carries out the idle adjusting of unit;
Wherein, every separate unit blower fan active power-reactive power relation curve is that just often blower fan is under whole field control pattern according to control far away, and the long-term log data analysis of unit obtains.
2. the idle control method of blower fan is characterized in that during wind energy turbine set according to claim 1 controlling fault far away, the judgment mechanism of said controlling fault far away contain controlling fault Rule of judgment far away and in the software handshake mechanism of control and blower fan.
3. the idle control method of blower fan is characterized in that during wind energy turbine set according to claim 1 and 2 controlling fault far away, said every separate unit blower fan active power-reactive power relation curve, and its transverse axis is a blower fan active power, the longitudinal axis is the blower fan reactive power; Obtaining of curve at first is to obtain OFFSET to pass through an O '; Said O ' region is to pass through the zone in the special active power of unit, and perceptual idle, all casees that said O ' moves for wind electric field blower become and the used perception of main transformer is idle and the capacitive reactive power balance point of wind field circuit self;
When blower fan active power is lower than under the following value condition of O ', it is negative value that blower fan is exported idle value, and promptly blower fan is according to curvilinear motion rule output lagging reactive power;
When blower fan active power is higher than under the above value condition of O ', blower fan export idle value on the occasion of, promptly blower fan is according to curvilinear motion rule output capacitive reactive power.
4. the idle control method of blower fan is characterized in that during wind energy turbine set according to claim 3 controlling fault far away, and said every separate unit blower fan active power-reactive power relation curve is divided into a plurality of variations sections.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104345225A (en) * | 2013-07-31 | 2015-02-11 | 国家电网公司 | SVG apparatus detection system based on RTDS |
| CN109672228A (en) * | 2017-10-17 | 2019-04-23 | 中车株洲电力机车研究所有限公司 | A kind of Wind turbines reactive power control method |
| CN110707724A (en) * | 2019-11-26 | 2020-01-17 | 江苏方天电力技术有限公司 | Power distribution network reactive support capability assessment method |
| CN113067342A (en) * | 2021-05-17 | 2021-07-02 | 阳光电源股份有限公司 | Grid-connected point voltage fluctuation suppression method and new energy power station |
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| US20090309360A1 (en) * | 2008-06-16 | 2009-12-17 | Nordex Energy Gmbh | Method for controlling a wind energy plant |
| CN101871422A (en) * | 2009-04-22 | 2010-10-27 | 湘潭大学 | Coordination control method for LVRT (Low Voltage Ride Through) of wind turbine |
| CN101977006A (en) * | 2010-10-28 | 2011-02-16 | 天津大学 | Method for controlling double-fed wind driven generator in power grid faults |
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- 2012-07-27 CN CN201210265583.1A patent/CN102769293B/en active Active
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| US20090309360A1 (en) * | 2008-06-16 | 2009-12-17 | Nordex Energy Gmbh | Method for controlling a wind energy plant |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104345225A (en) * | 2013-07-31 | 2015-02-11 | 国家电网公司 | SVG apparatus detection system based on RTDS |
| CN109672228A (en) * | 2017-10-17 | 2019-04-23 | 中车株洲电力机车研究所有限公司 | A kind of Wind turbines reactive power control method |
| CN110707724A (en) * | 2019-11-26 | 2020-01-17 | 江苏方天电力技术有限公司 | Power distribution network reactive support capability assessment method |
| CN110707724B (en) * | 2019-11-26 | 2021-08-03 | 江苏方天电力技术有限公司 | Power distribution network reactive support capability assessment method |
| CN113067342A (en) * | 2021-05-17 | 2021-07-02 | 阳光电源股份有限公司 | Grid-connected point voltage fluctuation suppression method and new energy power station |
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| CN102769293B (en) | 2014-10-08 |
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