CN104065079A - Coordination control method for wind power discretization and continuous reactive compensation - Google Patents
Coordination control method for wind power discretization and continuous reactive compensation Download PDFInfo
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- CN104065079A CN104065079A CN201410331566.2A CN201410331566A CN104065079A CN 104065079 A CN104065079 A CN 104065079A CN 201410331566 A CN201410331566 A CN 201410331566A CN 104065079 A CN104065079 A CN 104065079A
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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 relates to a coordination control method for wind power discretization and continuous reactive compensation. First, an AVC joint debugging system acquires real-time information of reactive compensation devices in a power grid through a control system, and reactive compensation device parameter models and fixed value information in the AVC joint debugging system are combined with voltage reactive information of the power grid to perform reactive optimization strategy calculation on the voltage in a wind power plant, and thus coordination control over the continuous reactive compensation device and other fixed-capacity discrete reactive compensation devices in the wind power field is achieved.
Description
Technical field
A kind of electric network reactive-load voltage integrated that the present invention relates to power system automatic field is controlled optimization method, specifically the control method for coordinating of the discrete and Continuous Var Compensation of a kind of wind-powered electricity generation.
Background technology
Closely during the last ten years, along with the high speed development of China's economic, country continues electrical network to implement extensive investment, and therefore electric power system has obtained development at a high speed, and electrical network increase in size is rapid, and power automation technology is also greatly improved.The green energy resources such as country had strengthened the investment to renewable and clean energy resources such as wind-powered electricity generations especially in recent years, wind-powered electricity generation development is very fast.
It is basis that AVC system be take accurately real time information, and the voltage power-less regulating measure by electrical network realizes the automatic adjusting to electric network reactive-load.The adjustable gear of transformer that current AVC system generally configures in electrical network, capacitor/reactor are as voltage and reactive power compensation means, because the capacitor/reactor being equipped with is at present fixed capacity, causing AVC system is discrete to the adjusting of voltage power-less, can not meet in actual electric network the continuously smooth of voltage power-less is regulated to requirement, cannot really accomplish idle local compensation, voltage smooth adjustment.And Continuous Var Compensation device governing speed is relatively slow, finite capacity, cannot adapt to large this feature of voltage power-less fluctuation in wind energy turbine set.
Summary of the invention
The present invention aims to provide the control method for coordinating of the discrete and Continuous Var Compensation of a kind of wind-powered electricity generation, adopt AVC uniting and adjustment control mode, access Continuous Var Compensation device, the system of realization to the Continuous Compensation of wind energy turbine set voltage power-less, optimize current voltage Reactive Power Automatic Regulating, reduce grid loss, improve quality of voltage, reduce the expense that voltage and reactive power optimization regulates, improve conditioning equipment useful life.
Technical scheme of the present invention is as follows:
A control method for coordinating for the discrete and Continuous Var Compensation of wind-powered electricity generation, is characterized in that implementing to coordinate to control according to following steps:
1), in AVC uniting and adjustment system, addition is measured: the measurement amount of adding comprises that booster stations uprise that idle, current Continuous Var Compensation device is idle exerts oneself and the idle of current discrete Reactive Power Device exerted oneself; And in AVC uniting and adjustment system, set up Continuous Var Compensation device parameter model and discrete reactive power compensator parameter model, the idle adjusting bound of exerting oneself of typing Continuous Var Compensation device, the rated capacity Qc of each discrete Reactive Power Device;
2), calculate current booster stations of actual reactive requirement reqQ:reqQ=in current wind energy turbine set and uprise idle the exerting oneself of idle value-current Continuous Var Compensation device-dropped into the idle of discrete Reactive Power Device to exert oneself; And the idle critical point deltQi:deltQi=Qci * S that exerts oneself when calculating current adjustable i and organizing discrete Reactive Power Device and drop into; In formula, i represents that discrete Reactive Power Device numbers i numbering of descending by measure, and S is discrete and continuous reactive device handoff factor, and it is actual reactive requirement and the current ratio of waiting to throw discrete Reactive Power Device capacity while dropping into discrete Reactive Power Device; If capacitive reactive power device, Qci get on the occasion of, if perceptual Reactive Power Device, Qci gets negative value;
3), according to voltage instantaneous value and voltage limit value, calculate current voltage and regulate direction, needing boosted voltage is CAPON, need to reduce voltage is CAPOFF, and is implemented as follows coordination control strategy and carries out the adjusting of wind-powered electricity generation voltage power-less:
Under CAPON, during reqQ-deltQi > 0, excise a), successively one group at the discrete inductive reactive power compensation device of throwing, until all discrete perceptual Reactive Power Devices all excise complete; B), drop into i and organize discrete capacitive reactive power compensation arrangement, forbid the idle output of Continuous Var Compensation device simultaneously; C), regulating Continuous Var Compensation device, input capacitive reactive power, input amount is that Continuous Var Compensation device single allows step-length;
Under CAPON, reqQ-deltQi≤0 o'clock, excises one group a), successively at the discrete inductive reactive power compensation device of throwing, until all discrete perceptual Reactive Power Devices all excise complete; B), regulating Continuous Var Compensation device, input capacitive reactive power, input amount is that Continuous Var Compensation device single allows step-length;
Under CAPOFF, during reqQ-deltQi > 0, excise a), successively one group at the discrete capacitive reactive power compensation arrangement of throwing, until all discrete capacitive reactive power devices all excise complete; B), drop into i and organize discrete inductive reactive power compensation device, forbid the idle output of Continuous Var Compensation device simultaneously; C), regulate Continuous Var Compensation device, drop into perception idle, input amount is that Continuous Var Compensation device single allows step-length;
Under CAPON, reqQ-deltQi≤0 o'clock, excises one group a), successively at the discrete capacitive reactive power compensation arrangement of throwing, until all discrete capacitive reactive power devices all excise complete; B), regulate Continuous Var Compensation device, drop into perception idle, input amount is that Continuous Var Compensation device single allows step-length.
Good effect of the present invention is: the present invention accesses Continuous Var Compensation device and discrete Reactive Power Device in wind-powered electricity generation booster stations in AVC system, according to the method for discrete Reactive Power Device coarse adjustment, the fine tuning of continuous reactive device, realized to stand interior Continuous Var Compensation device and discrete reactive power compensator coordination control.The continuously smooth of having realized user's side voltage regulates, optimized the adjusting of voltage power-less in electrical network, reduced scope range of the fluctuation of voltage, stability and the reliability of voltage have been improved, realized idle continuous local compensation, reduced the mobility in electrical network idle, thereby reduced the loss of electrical network, reduce the adjusting number of times of reactive apparatus, improved utilance and the useful life of reactive-load compensation equipment in station.
The present invention uses Continuous Var Compensation device at station end, in conjunction with original discrete reactive power compensator, utilizes original control system information and means of communication.Have cost low, income is large, the feature having a extensive future.
Embodiment
Below in conjunction with embodiment, further illustrate the present invention.
Discrete and the Continuous Var Compensation control method for coordinating of a kind of wind-powered electricity generation of the present invention, first, AVC uniting and adjustment system is obtained the real time information of Continuous Var Compensation device in electrical network by control system, then according to the reactive power compensator parameter model in AVC uniting and adjustment system and definite value information, voltage power-less information in conjunction with electrical network, carry out voltage and reactive power optimization policy calculation in wind energy turbine set, realize the coordination of the discrete reactive power compensator of Continuous Var Compensation device and other fixed capacities in wind energy turbine set is controlled.
Below to control step.
1, in AVC uniting and adjustment system, addition is measured: the measurement amount of adding comprises that booster stations uprise that idle, current Continuous Var Compensation device is idle exerts oneself and the idle of current discrete Reactive Power Device exerted oneself.
2, in AVC uniting and adjustment system, set up Continuous Var Compensation device parameter model and discrete reactive power compensator parameter model, the idle adjusting bound of exerting oneself of typing Continuous Var Compensation device, the rated capacity Qc of each discrete reactive power compensator.
3, calculate current booster stations of actual reactive requirement reqQ:reqQ=in current wind energy turbine set and uprise idle the exerting oneself of idle value-current Continuous Var Compensation device-dropped into the idle of discrete Reactive Power Device to exert oneself;
And the idle critical point deltQi:deltQi=Qci * S that exerts oneself when calculating current adjustable i and organizing discrete Reactive Power Device and drop into.
In formula, i represents that discrete Reactive Power Device numbers i numbering of descending by measure.S is discrete and continuous reactive device handoff factor, and it is actual reactive requirement and the current ratio of waiting to throw discrete Reactive Power Device capacity while dropping into discrete Reactive Power Device.
Wherein if capacitive reactive power device, Qci get on the occasion of, if perceptual Reactive Power Device, Qci gets negative value.
4,, according to voltage instantaneous value and voltage limit value, calculate current voltage and regulate direction.Needing boosted voltage is CAPON, and need to reduce voltage is CAPOFF.And the coordination control strategy that uses table 1 carries out the adjusting of wind-powered electricity generation voltage power-less:
Table 1, coordination control strategy
Claims (1)
1. a control method for coordinating for the discrete and Continuous Var Compensation of wind-powered electricity generation, is characterized in that implementing to coordinate to control according to following steps:
1), in AVC uniting and adjustment system, addition is measured: the measurement amount of adding comprises that booster stations uprise that idle, current Continuous Var Compensation device is idle exerts oneself and the idle of current discrete Reactive Power Device exerted oneself; And in AVC uniting and adjustment system, set up Continuous Var Compensation device parameter model and discrete reactive power compensator parameter model, the idle adjusting bound of exerting oneself of typing Continuous Var Compensation device, the rated capacity Qc of each discrete Reactive Power Device;
2), calculate current booster stations of actual reactive requirement reqQ:reqQ=in current wind energy turbine set and uprise idle the exerting oneself of idle value-current Continuous Var Compensation device-dropped into the idle of discrete Reactive Power Device to exert oneself; And the idle critical point deltQi:deltQi=Qci * S that exerts oneself when calculating current adjustable i and organizing discrete Reactive Power Device and drop into; In formula, i represents that discrete Reactive Power Device numbers i numbering of descending by measure, and S is discrete and continuous reactive device handoff factor, and it is actual reactive requirement and the current ratio of waiting to throw discrete Reactive Power Device capacity while dropping into discrete Reactive Power Device; If capacitive reactive power device, Qci get on the occasion of, if perceptual Reactive Power Device, Qci gets negative value;
3), according to voltage instantaneous value and voltage limit value, calculate current voltage and regulate direction, needing boosted voltage is CAPON, need to reduce voltage is CAPOFF, and is implemented as follows coordination control strategy and carries out the adjusting of wind-powered electricity generation voltage power-less:
Under CAPON, during reqQ-deltQi > 0, excise a), successively one group at the discrete inductive reactive power compensation device of throwing, until all discrete perceptual Reactive Power Devices all excise complete; B), drop into i and organize discrete capacitive reactive power compensation arrangement, forbid the idle output of Continuous Var Compensation device simultaneously; C), regulating Continuous Var Compensation device, input capacitive reactive power, input amount is that Continuous Var Compensation device single allows step-length;
Under CAPON, reqQ-deltQi≤0 o'clock, excises one group a), successively at the discrete inductive reactive power compensation device of throwing, until all discrete perceptual Reactive Power Devices all excise complete; B), regulating Continuous Var Compensation device, input capacitive reactive power, input amount is that Continuous Var Compensation device single allows step-length;
Under CAPOFF, during reqQ-deltQi > 0, excise a), successively one group at the discrete capacitive reactive power compensation arrangement of throwing, until all discrete capacitive reactive power devices all excise complete; B), drop into i and organize discrete inductive reactive power compensation device, forbid the idle output of Continuous Var Compensation device simultaneously; C), regulate Continuous Var Compensation device, drop into perception idle, input amount is that Continuous Var Compensation device single allows step-length;
Under CAPON, reqQ-deltQi≤0 o'clock, excises one group a), successively at the discrete capacitive reactive power compensation arrangement of throwing, until all discrete capacitive reactive power devices all excise complete; B), regulate Continuous Var Compensation device, drop into perception idle, input amount is that Continuous Var Compensation device single allows step-length.
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| CN105552926A (en) * | 2016-01-05 | 2016-05-04 | 上海思源弘瑞自动化有限公司 | Reactive power compensation method and system of electric field |
| CN107800141A (en) * | 2016-08-31 | 2018-03-13 | 中国石油化工股份有限公司 | A kind of Reactive Compensation of Distribution Lines method and system |
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Denomination of invention: A coordinated control method for discrete and continuous reactive power compensation of wind power Effective date of registration: 20211213 Granted publication date: 20160120 Pledgee: Yantai financing guarantee Group Co.,Ltd. Pledgor: DONGFANG ELECTRONICS Co.,Ltd. Registration number: Y2021980014783 |
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Date of cancellation: 20220725 Granted publication date: 20160120 Pledgee: Yantai financing guarantee Group Co.,Ltd. Pledgor: DONGFANG ELECTRONICS Co.,Ltd. Registration number: Y2021980014783 |