CN106300380B - A kind of selection method of reactive-load compensation capacitor - Google Patents
A kind of selection method of reactive-load compensation capacitor Download PDFInfo
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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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- 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
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- Y02E40/30—Reactive power compensation
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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
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.
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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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| 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 |
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Patent Citations (4)
| 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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