CN106300380B - A kind of selection method of reactive-load compensation capacitor - Google Patents

A kind of selection method of reactive-load compensation capacitor Download PDF

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CN106300380B
CN106300380B CN201610750359.XA CN201610750359A CN106300380B CN 106300380 B CN106300380 B CN 106300380B CN 201610750359 A CN201610750359 A CN 201610750359A CN 106300380 B CN106300380 B CN 106300380B
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capacitor
combination
use state
reactive
come
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CN106300380A (en
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王培慧
邹连明
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Ningbo Sanxing Smart Electric Co Ltd
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Ningbo Sanxing Smart Electric Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30Reactive power compensation

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
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Abstract

A kind of selection method of reactive-load compensation capacitor, which is characterized in that described method includes following steps: capacitor is numbered, and records the capability value Q of each capacitori, and set the use state A of each capacitori, come into operation Ai=1, do not come into operation Ai=0;All capacitors arranged in numerical order are subjected to permutation and combination according to use state, and sequence number is pressed to each combination;According to formula Q=∑ Ai*QiCalculate each combined capacitor investment capacity Qk;Calculate the reactive power Q for needing to compensateneed;Each combined capacitor is put into capacity QkThe reactive power Q compensated with needsneedIt compares, obtains that immediate combination;Record the use state of all capacitors of the combination;The capacitor for needing to devote oneself to work according to the selection of the use state of capacitor each in combination;The invention has the advantages that algorithm is simple, it is not easy to malfunction.

Description

A kind of selection method of reactive-load compensation capacitor
Technical field
The present invention relates to No-Work Power Compensation Capacity in Electricity System technical fields, and in particular to the choosing for reactive-load compensation capacitor Selection method.
Background technique
The height of power factor in electric system power supply, electrical equipment utilization efficiency have significant impact.Function Rate factor is high, and utilization efficiency is just high, and reactive power is low;Conversely, power factor is low, for utilization efficiency with regard to low, reactive power is high.It is idle Power is the power for being used to establish and maintain in the electrical apparatus magnetic field in the power system, it does not do work externally, can reduce function Rate factor.Power factor is properly increased, power grid current supply loss can be reduced, improves the efficiency of power supply unit;Moreover, it is also possible to mention The working efficiency of high user power utilization equipment, reduces the electric energy loss of user, plays energy-conserving action.Therefore, reactive power benefit is carried out Work is repaid, the power factor of power grid is improved, reduces the electric energy loss of power grid, there is significant Social benefit and economic benefit.
Currently, by configuring shunt capacitor (i.e. by changing shunt capacitor capability value) come compensating power.So And the condenser capacity value in shunt capacitor has plurality of specifications, has the capacitor of 30kvar, also there is the capacitor of 10kvar Device.Firstly, calculating to obtain the reactive power for needing to compensate by the power factor, active power, reactive power of load-side.According to The suitable capacitor of reactive power reselection that the needs being calculated compensate is devoted oneself to work, existing capacitor selection algorithm ratio More complex, calculating process is easy error, once calculating error, be easy to cause over-compensation or under-compensation situation.
Summary of the invention
The technical problem to be solved by the present invention is to be directed to the situation of the prior art, provide that a kind of algorithm is simple, is not easy out The selection method of wrong reactive-load compensation capacitor.
The technical scheme of the invention to solve the technical problem is: a kind of selecting party of reactive-load compensation capacitor Method, which is characterized in that described method includes following steps:
Capacitor is numbered S01, records the capability value Q of each capacitori, and set the use of each capacitor State Ai, use state, which is divided into, to come into operation and does not come into operation, and come into operation Ai=1, do not come into operation Ai=0;
All capacitors arranged in numerical order are carried out permutation and combination according to use state by S02, and to each combination By sequence number;
S03, according to formula Q=∑ Ai*QiCalculate each combined capacitor investment capacity Qk
S04 calculates the reactive power for needing to compensate by the power factor, active power, reactive power of load-side Qneed
Each combined capacitor is put into capacity Q by S05kThe reactive power Q compensated with needsneedIt compares, finds most That close combination;
S06 records the use state of all capacitors of the combination;
S07, the capacitor for needing to devote oneself to work according to the selection of the use state of capacitor each in combination.
In order to facilitate calculating, in the step S01, before capacitor is numbered, first capacitor is arranged from big to small Sequence.
In the step S02, serial number is corresponding with the binary value of capacitor use state of the group.It carries out in this way The speed of permutation and combination is not in mistake faster.
In the step S03, capacity Q is put into capacitorkIt is ranked up.
Capacitor is carried out permutation and combination according to use state by the present invention, calculates each combined capacitor investment capacity, And it is compared with the reactive power compensated is needed, finds that most close combination, selected according to the use state of the combination The capacitor for needing to come into operation.
Detailed description of the invention
Fig. 1 is flow diagram of the invention;
Specific embodiment
Now in conjunction with attached drawing, the invention will be described in further detail.
As shown in Figure 1, a kind of selection method of reactive-load compensation capacitor, the specific steps are as follows:
Capacitor is numbered S01, records the capability value Q of each capacitori, and set the use of each capacitor State Ai, (i=1,2 ..., n), use state, which is divided into, to come into operation and does not come into operation, and come into operation Ai=1, it does not come into operation Ai=0.After being ranked up capacitor from big to small for convenience of calculation, then number.
All capacitors arranged in numerical order are carried out permutation and combination according to use state, obtain 2 by S02nA group It closes, and sequence number is pressed to each combine, and serial number k (k=0,1 ..., 2n-1).Each group is combined into capacitor use state Array { A1, A2... An}.Serial number is corresponding with the binary value of capacitor use state of the group;For example, capacitor number is 4 When a, serial number 5, corresponding binary value is 0101.
S03, according to formula Q=∑ Ai*QiCalculate each combined capacitor investment capacity Qk(k=0,1 ..., 2n- 1), in order to search conveniently, capacitor is put into capacity QkIt is arranged from small to large or from big to small.
Each combined capacitor is put into capacity Q by S04kThe reactive power Q compensated with needsneedIt compares, obtains most That close combination.
S05 records the use state of all capacitors of the combination.
S06, according to the capacitor that the selection of the use state of capacitance each in combination needs to devote oneself to work, Ai=1 investment makes With Ai=0 does not come into operation.
Before S04 step by the power factor of load-side, active power, reactive power calculate needs compensate it is idle Power Qneed
Embodiment 1:
By taking capacitor number n=4 as an example, Q1=40kvar, Q2=30kvar, Q3=20kvar, Q4=5kvar from greatly to Minispread.
4 capacitors are subjected to permutation and combination according to different use states, and calculate each combined capacitor investment Capacity, such as following table.
Assuming that the reactive power Q for needing to compensateneed=69, every group capacitor is put into capacity and QneedCompare, finds and 69 Immediate is the 12nd group, and the 12nd group of array is { 1,1,0,0 }, and corresponding use state is A1=1, A2=1, A3=0, A4 =0.Therefore No. 1 capacitor and No. 2 capacitor is selected to come into operation.
Embodiment 2:
By taking capacitor number n=4 as an example, Q1=30kvar, Q2=20kvar, Q3=5kvar, Q4=40kvar.
4 capacitors are subjected to permutation and combination according to different use states, and calculate each combined capacitor investment Capacity, such as following table.
Assuming that the reactive power Q for needing to compensateneed=69, every group capacitor is put into capacity and QneedCompare, finds and 69 Immediate is the 9th group, and the 9th group of array is { 1,0,0,1 }, and corresponding use state is A1=1, A2=0, A3=0, A4= 1.Therefore No. 1 capacitor and No. 4 capacitor is selected to come into operation.
The present invention carries out permutation and combination according to the use state of capacitor, calculates each combined capacitor investment and holds Amount, and be compared with the reactive power compensated is needed, that most close combination is found, is selected according to the investment state of the combination Select the capacitor for needing to come into operation.

Claims (2)

1. a kind of selection method of reactive-load compensation capacitor, which is characterized in that described method includes following steps:
Capacitor is ranked up from big to small according to the capability value of capacitor, then capacitor is numbered by S01, record The capability value Q of each capacitori, and set the use state A of each capacitori, use state, which is divided into, to be come into operation and does not put into It uses, come into operation Ai=1, do not come into operation Ai=0;
All capacitors arranged in numerical order are carried out permutation and combination according to use state by S02, and sequentially to each combination Column number, the value mode of serial number K, K are as follows: K=0,1,2n- 1, serial number K and corresponding combined capacitor use state Binary value it is corresponding;
S03,2nAccording to formula Q=∑ A in a combinationi*QiCalculate each combined capacitor investment capacity Qk
S04 calculates the reactive power Q for needing to compensate by the power factor, active power, reactive power of load-sideneed
Each combined capacitor is put into capacity Q by S05kThe reactive power Q compensated with needsneedIt compares, finds closest That combination;
S06 records the use state of all capacitors of the combination;
S07, the capacitor for needing to devote oneself to work according to the selection of the use state of capacitor each in combination.
2. the selection method of reactive-load compensation capacitor according to claim 1, it is characterised in that: right in the step S03 Capacitor puts into capacity QkIt is ranked up.
CN201610750359.XA 2016-08-27 2016-08-27 A kind of selection method of reactive-load compensation capacitor Active CN106300380B (en)

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CN107221939B (en) * 2017-07-18 2019-07-02 江苏斯菲尔电气股份有限公司 The control of reactive power compensating group network system and its capacity diffused integration compensation method
CN109361222A (en) * 2018-09-14 2019-02-19 江苏斯菲尔电气股份有限公司 Hybrid reactive compensation control system
CN112729497A (en) * 2021-01-19 2021-04-30 湖北航鹏化学动力科技有限责任公司 Efficient medicament weighing method and device
CN115980458B (en) * 2023-03-21 2023-08-25 广东电网有限责任公司广州供电局 Method, device, system, equipment and medium for detecting capacity of capacitor in transformer area

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050980A (en) * 2012-11-21 2013-04-17 杭州万禾电力科技有限公司 Low-voltage capacitance compensating system and control method
CN104167743A (en) * 2014-08-21 2014-11-26 巢湖市金辉自控设备有限公司 Capacitance adjusting method for intelligent power capacitor
CN104578094A (en) * 2014-12-22 2015-04-29 深圳市盛弘电气有限公司 Capacitance switching method and device
CN105024383A (en) * 2014-03-20 2015-11-04 深圳市科陆驱动技术有限公司 Capacitor switching method in reactive compensation

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103050980A (en) * 2012-11-21 2013-04-17 杭州万禾电力科技有限公司 Low-voltage capacitance compensating system and control method
CN105024383A (en) * 2014-03-20 2015-11-04 深圳市科陆驱动技术有限公司 Capacitor switching method in reactive compensation
CN104167743A (en) * 2014-08-21 2014-11-26 巢湖市金辉自控设备有限公司 Capacitance adjusting method for intelligent power capacitor
CN104578094A (en) * 2014-12-22 2015-04-29 深圳市盛弘电气有限公司 Capacitance switching method and device

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