CN101588070B - Method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement - Google Patents
Method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement Download PDFInfo
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- CN101588070B CN101588070B CN2009101155422A CN200910115542A CN101588070B CN 101588070 B CN101588070 B CN 101588070B CN 2009101155422 A CN2009101155422 A CN 2009101155422A CN 200910115542 A CN200910115542 A CN 200910115542A CN 101588070 B CN101588070 B CN 101588070B
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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
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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
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention discloses a method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement. The method comprises: measuring the 95% probability value and average power factor of obtained idle work, harmonic wave and flicker; calculating the harmonic wave compensation capacity Qx; calculating the flicker improvement rate; calculating the needed reactive compensation ratio; defining the reactive compensation capacity Qw of the dynamic compensation arrangement as half of the compensation capacity; defining the dynamic compensation capacity Qd of the parallel connection mixed type comprehensive compensation arrangement as the root-mean-square value of Qw and Qx; composing a dynamic compensation part with theactual dynamic reactive compensation capacity of 2Qw; calculating the needed total reactive compensation capacity Qz; and defining the capacity Qg of the fixed capacity compensation branch as the difference value of the Qz and 2Qw. The invention provides effective guidance to the distribution of the dynamic capacity and fixed capacity of mixed type parallel connection comprehensive compensation arrangement, guarantees compensation effect, while greatly reduces the capacity of dynamic compensation arrangement, thereby improves the cost performance of the arrangement.
Description
Technical field
The present invention relates to a kind of Capacity design method of parallel connection mixed type comprehensive compensation arrangement, but the particularly a kind of dynamic capacity of the comprehensive compensating device in parallel that constitutes by fixedly capacitive compensation branch road and the design and the distribution method of fixed capacity based on the parallel connection type dynamic compensating device of turn-off device and switching.
Background technology
Along with power system development, the application of various non-linear, impact loads more and more widely, power quality problems such as thing followed harmonic wave, voltage fluctuation and flicker become increasingly conspicuous, requirement to the correlative compensation device is also more and more higher, and traditional can't meet the demands as compensation ways such as fixed capacitor and passive filters.With SVG be representative based on the parallel connection type dynamic compensating device of turn-off device owing to can carry out quick dynamic compensation to reactive power and harmonic wave, become the focus of present research and application.Consider the high price of dynamic compensating device, using it separately, to compensate cost performance not high, is unfavorable for applying yet.The mixed type compensation arrangement can effectively be displayed one's respective advantages the use that matches of dynamic compensating device and fixed compensation device, reduces reducing cost greatly simultaneously, becomes the main flow of application.
The research of parallel connection mixed type compensation arrangement more concentrates on structure and control aspect, design and distribution aspect to dynamic capacity and fixed capacity relate to seldom, how rule of thumb to design, the value that obtains with estimated value or test is reference, with a hundred per cent is the compensation target, dynamic capacity and fixed capacity were distributed by 1: 1, and the fixed compensation device does not divide into groups, if the grouping compensation is to equate with the capacity setting of each bar branch road usually also.This method for designing is not to be target with the cost performance, and is also uneconomical economically, causes the waste of dynamic compensating device capacity easily, is unfavorable for applying of this type of device.
Summary of the invention
For improving the cost performance of parallel connection mixed type compensation arrangement, make the capacity allocation of its dynamic compensation part and fixed compensation part more reasonable, the invention provides the design and the distribution method of a kind of parallel connection mixed type comprehensive compensation arrangement dynamic capacity and fixed capacity.
Implementation of the present invention is as follows: measuring system is idle, 95% probable value and the average power factor of harmonic wave and flickering; 95% probable value according to flickering is calculated flickering improvement rate with the flickering value that the expectation of improvement back reaches; Flickering compensation effect and the required reactive power compensation degree of the curve of compensation capacity and response time accounting according to the actual measurement of the Japanese electric heating committee; According to 95% idle probable value of system, 1/2 reactive compensation capacity Qw of the compensation capacity that will obtain by the reactive power compensation degree as dynamic compensating device; The harmonic wave compensation capacity Qx of the desired value calculating dynamic compensating device according to each harmonic electric current 95% probable value that exceeds standard and after administering; Calculate the capacity Qd of the root-mean-square value of Qw and Qx as dynamic compensating device in the parallel connection mixed type comprehensive compensation arrangement; Calculate required total reactive compensation capacity Qz according to desired power factor that reaches and 95% idle probable value; With the difference of Qz and Qw as fixed compensation capacity Qg in the parallel connection mixed type comprehensive compensation arrangement.
But mixed type comprehensive compensating device of the present invention is by constituting based on the parallel connection type dynamic compensating device of turn-off device and the fixedly capacitive compensation branch road of switching.
The described reactive capability of the inventive method is that fixed compensation branch road and the dynamic compensating device of Qw adopts a switch in parallel to form dynamic compensation part, and its dynamic passive compensation scope is 0～2Qw; But the difference of Qz and 2Qw conduct switching is the capacitive compensation branch road fixedly, and its group capacity is least unit with 2Qw, if many groups are arranged, then each pool-size is followed successively by 2
n* 2Qw (n=0,1,2,3 ...), thereby satisfy reactive capability 0～(2
N+1-1) * smooth adjustment of 2Qw.
Desired value after harmonic current described in the inventive method and flickering are administered is taken as 30%～50% of state's scale value.
Beneficial effect of the present invention is: 95% probable value with every test data is design considerations, and being reduced to state's scale value after administering with every value that exceeds standard is target below 50%, has effectively avoided the waste of compensation capacity when satisfying regulation effect; Adjust dynamic capacity by flickering compensation effect and the curve of compensation capacity and response time of introducing actual measurement, can carry out when guaranteeing the flickering regulation effect, making the dynamic capacity design more reasonable according to the actual performance of device at changing design; Utilization can absorb based on the parallel connection type dynamic compensating device of turn-off device and can send idle characteristics, the dynamic apparatus and the fixture of equal capacity are designed to common switch in parallel, make that actual dynamic compensation capacity is double, reduced the investment of dynamic compensating device; By with the capacity of fixed compensation branch road with 2
N+1(n=0,1,2,3 ...) sequence of times dynamic compensating device capacity designs, and realized mixed type compensation arrangement from 0 to (2
N+2-2) (n=0,1,2,3 ...) smooth adjustment of times dynamic compensating device capacity, guaranteed that better system voltage adjusts effect.
Description of drawings
Fig. 1 is the design and the distribution method overall flow figure of parallel connection mixed type comprehensive compensation arrangement dynamic capacity of the present invention and fixed capacity.
Fig. 2 is the flickering compensation effect and the curve of compensation capacity and response time of Japanese electric heating committee actual measurement.
Fig. 3 is parallel connection mixed type comprehensive compensation arrangement structure and capacity allocation figure.
Embodiment
The present invention is described in detail to contrast accompanying drawing below in conjunction with embodiment.
Referring to Fig. 1, basic procedure according to the design and the distribution of parallel connection mixed type comprehensive compensation arrangement dynamic capacity and fixed capacity, at first by measurement calculate that system is idle, 95% probable value Q, Pst and the In of flickering and harmonic wave, and average power factor λ, setting power factor, flickering and each time simultaneously exceed standard desired value λ e, Pstg behind the harmonic wave control and Inth (n is the number of times of the harmonic wave that exceeds standard), wherein Pstg and Inth are 40% of state's scale value.95% probable value Pst and improvement back according to flickering expect that the flickering value Pstg that reaches calculates flickering improvement rate Pg, and computing formula is:
According to the real response speed of dynamic compensating device, flickering compensation effect and the curve of compensation capacity and response time of contrast Fig. 2 are adjusted required reactive power compensation degree.Adopt the parallel connection type dynamic compensating device based on turn-off device in the present embodiment, the common response time is 5ms, the curve of τ=5ms in the corresponding diagram 2, and can obtain required reactive power compensation degree by flickering improvement rate Pg is Qbd.Calculate the required dynamic compensation capacity of mixing arrangement according to the idle 95% probable value Q of system, 1/2 as the reactive compensation capacity Qw that is dynamic compensating device, computing formula is: Qw=Q * Qbd/2 with it.The harmonic wave compensation capacity Qx of the desired value Inth calculating dynamic compensating device according to the each harmonic electric current 95% probable value In that exceeds standard and after administering, computing formula is:
U is for intending the line voltage of connecting system in the formula, and n is the number of times of the harmonic wave that exceeds standard.Calculate the capacity Qd of the root-mean-square value of Qw and Qx as dynamic compensating device in the parallel connection mixed type comprehensive compensation arrangement, formula is
Calculate required total reactive compensation capacity Qz according to the average power factor λ that measures, the desired power factor λ e that reaches and 95% idle probable value Q, computing formula is:
With the difference of Qz and Qw as fixed compensation capacity Qg, i.e. Qg=Qz-Qw in the parallel connection mixed type comprehensive compensation arrangement.
For the grouping of fixed compensation device, as shown in Figure 3, wherein reactive capability is fixed compensation branch road and a switch in parallel formation of the dynamic compensating device employing dynamic compensation part of Qw, and its dynamic passive compensation scope is 0～2Qw; But the difference of Qz and 2Qw conduct switching is the capacitive compensation branch road fixedly, and its group capacity is a least unit with 2Qw, and many groups are arranged, and each pool-size is followed successively by 2
n* 2Qw (n=0,1,2,3 ...), thereby satisfy reactive capability 0～(2
N+1-1) * smooth adjustment of 2Qw.
Claims (4)
1. the design and the distribution method of parallel connection mixed type comprehensive compensation arrangement dynamic capacity and fixed capacity may further comprise the steps:
1.1) measuring system is idle, 95% probable value and the average power factor of harmonic wave and flickering;
1.2) calculating dynamic compensating device capacity:
1.2.1) according to 95% probable value of flickering with administer the flickering value that the back expectation reaches and calculate flickering improvement rate;
1.2.2) according to the flickering compensation effect and the required reactive power compensation degree of the curve of compensation capacity and response time accounting of Japanese electric heating committee actual measurement;
1.2.3) according to 95% idle probable value of system, 1/2 reactive compensation capacity Qw of the compensation capacity that will obtain by the reactive power compensation degree as dynamic compensating device;
1.2.4) according to each harmonic electric current 95% probable value that exceeds standard and the desired value after administering calculate the harmonic wave compensation capacity Qx of dynamic compensating device;
1.2.5) calculate the capacity Qd of the root-mean-square value of Qw and Qx as dynamic compensating device in the parallel connection mixed type comprehensive compensation arrangement;
1.3) calculating fixed compensation capacity
1.3.1) calculate required total reactive compensation capacity Qz according to desired power factor that reaches and 95% idle probable value;
1.3.2) with the difference of Qz and Qw as fixed compensation capacity Qg.
2. the design and the distribution method of parallel connection mixed type comprehensive compensation arrangement dynamic capacity according to claim 1 and fixed capacity is characterized in that: but the mixed type comprehensive compensating device is by constituting based on the parallel connection type dynamic compensating device of turn-off device and the fixedly capacitive compensation branch road of switching.
3. the design and the distribution method of parallel connection mixed type comprehensive compensation arrangement dynamic capacity according to claim 1 and fixed capacity, it is characterized in that: reactive compensation capacity is that fixed compensation branch road and the dynamic compensating device of Qw adopts a switch in parallel to form dynamic compensation part, and its dynamic passive compensation scope is 0～2Qw; But the difference of Qz and 2Qw conduct switching is the capacitive compensation branch road fixedly, and its group capacity is least unit with 2Qw, if many groups are arranged, then each pool-size is followed successively by 2
n* 2Qw (n=0,1,2,3 ...), thereby satisfy reactive capability 0～(2
N+1-1) * smooth adjustment of 2Qw.
4. the design and the distribution method of parallel connection mixed type comprehensive compensation arrangement dynamic capacity according to claim 1 and fixed capacity is characterized in that: the desired value after harmonic current and flickering are administered is taken as 30%～50% of state's scale value.
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| CN2009101155422A CN101588070B (en) | 2009-06-18 | 2009-06-18 | Method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement |
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| CN2009101155422A CN101588070B (en) | 2009-06-18 | 2009-06-18 | Method for designing and distributing the dynamic capacity and fixed capacity of parallel connection mixed type comprehensive compensation arrangement |
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| CN101588070B true CN101588070B (en) | 2011-03-30 |
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| CN105846430B (en) * | 2016-05-31 | 2018-11-09 | 国网北京市电力公司 | The passive filter of 110kV or more high-pressure systems and its determining method and apparatus |
| KR20170139399A (en) * | 2016-06-09 | 2017-12-19 | 엘에스산전 주식회사 | Reactive power compensation system and method thereof |
| CN106549395B (en) * | 2016-12-07 | 2019-03-29 | 广东电网有限责任公司电力科学研究院 | A kind of capacity collocation method of city dweller power distribution station comprehensive compensating device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100007A (en) * | 1987-01-05 | 1988-07-20 | 电子工业部工艺研究所 | Single chip microprocessor wattless power controller |
| CN101068082A (en) * | 2007-03-28 | 2007-11-07 | 中国南车集团株洲电力机车研究所 | Comprehensive compensating device and method |
| CN101388549A (en) * | 2008-07-04 | 2009-03-18 | 江西省电力科学研究院 | Passive, negative sequence and harmonic coordinating control method for mixed type electric energy quality regulator |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87100007A (en) * | 1987-01-05 | 1988-07-20 | 电子工业部工艺研究所 | Single chip microprocessor wattless power controller |
| CN101068082A (en) * | 2007-03-28 | 2007-11-07 | 中国南车集团株洲电力机车研究所 | Comprehensive compensating device and method |
| CN101388549A (en) * | 2008-07-04 | 2009-03-18 | 江西省电力科学研究院 | Passive, negative sequence and harmonic coordinating control method for mixed type electric energy quality regulator |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2007-267440A 2007.10.11 |
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