CN201733100U - Intelligent low-voltage idle automatic compensation tank - Google Patents
Intelligent low-voltage idle automatic compensation tank Download PDFInfo
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- CN201733100U CN201733100U CN2010202409509U CN201020240950U CN201733100U CN 201733100 U CN201733100 U CN 201733100U CN 2010202409509 U CN2010202409509 U CN 2010202409509U CN 201020240950 U CN201020240950 U CN 201020240950U CN 201733100 U CN201733100 U CN 201733100U
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- reactive power
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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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Abstract
The utility model relates to an intelligent low-voltage idle automatic compensation tank, which can rapidly reach an optimal compensation state when three-phase or single-phase reactive power changes. A-, B- and C-phase power sampling circuits and a display circuit are connected on a three-phase circuit; the output ends of the A-, B- and C-phase power sampling circuits are connected with a three-phase overvoltage detection circuit; the output end of the three-phase overvoltage detection circuit is connected with a reactive power Q comparison circuit; the output end of the reactive power Q comparison circuit is connected with a three-phase total compensation control circuit and a three-phase individual compensation control circuit; the output end of the three-phase total compensation control circuit is connected with the three-phase individual compensation control circuit; three groups of capacitors C are connected in series on the three-phase total compensation control circuit; and three groups of capacitors C are connected in parallel to the three-phase individual compensation control circuit. The compensation tank has the advantages of safety, reliability, economical efficiency, practicability, good compensation effect and capabilities of improving the operating efficiency of a transformer and ensuring safe operation of the transformer.
Description
Technical field
The utility model relates to a kind of intelligent low-pressure imaginary power automatic compensation case that can reach the The optimal compensation state when three-phase or the variation of single-phase reactive power fast.
Background technology
Raising along with The development in society and economy and living standards of the people, basic variation has taken place in the structure of resident living power utility and power consumption, become household electricity based on household electrical appliance such as air-conditioning, space heater, electric heater, washing machine, refrigerator, television set and electric cooking appliances from single electric consumption on lighting of past, not only electricity consumption of resident significantly increases, and the lagging reactive power increase, cause power factor of electric network to descend.In addition, because the difference of aspects such as daily schedule, personal preference, economic condition, the randomness of resident living power utility also increases greatly, and the peak-valley difference absolute value of load is very big.At present, the residential building building mostly is single phase power supply greatly, and the electricity consumption difference between every building residential building certainly will cause the three-phase power load unbalanced.Three-phase power load unbalanced certainly will be caused the distribution transformer unbalanced operation, and current in middle wire is increased, and increases copper loss, the iron loss of transformer, and the operational efficiency of transformer is reduced, and influences the safe operation of transformer.
Along with people improve constantly the requirement of power supply quality, electric power system is had higher requirement to low-pressure reactive compensation, for common transformer, not only to carry out the three phase reactive power compensation, also to carry out phase-splitting reactive compensation, to reach best reactive power compensation effect according to the unbalanced situation of three phase reactive power.This shows that traditional three-phase is mended mode altogether and can not be met the demands.This has just developed a kind of by " three-phase is mended altogether " the novel low-pressure reactive compensation scheme with " single-phase branch benefit " combination---and three-phase is mended+single-phase branch benefit mixed compensation altogether." three-phase is mended altogether " be according to the three phase reactive power total amount as sampling physical quantity and with this opening-closing capacitor bank, capacitor is a delta connection." single-phase branch benefit " be according to each phase reactive power difference as sampling physical quantity and with this opening-closing capacitor bank, the capacitor connection is a star connection.The three phase reactive power imbalance, and this unbalanced size, phase place constantly change.Because power load is constantly changing, three phase reactive power and single-phase reactive power are too in continuous variation, this will rooting according to the variation of three-phase and single-phase reactive power, tracking in good time, detection, judgement, calculating, control, execution, " three-phase is mended altogether " cooperates with " single-phase branch benefit " is tacit mutually, and come opening-closing capacitor bank according to certain principle, could realize low-pressure reactive compensation---mixed compensation.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of preferential assurance quality of voltage is provided, when line voltage is too high, even system is in the undercompensation state, also will drop into the capacitor excision of electrical network immediately, the intelligent low-pressure imaginary power automatic compensation case that can make line voltage reduce and avoid the overvoltage of capacitor operation like this, based on " three-phase is mended altogether ", " single-phase branch benefit " is auxilliary, when three-phase or the variation of single-phase reactive power, reach the The optimal compensation state fast.
Of the present utility modelly be achieved in that a kind of intelligent low-pressure imaginary power automatic compensation case, it is characterized in that: at the A of three-phase line, B, C is connected with A phase power sample circuit on mutually, B phase power sample circuit, C phase power sample circuit and demonstration three-phase line voltage and phase voltage, triple line electric current and phase current, three phases active power and reactive power, single-phase active power and reactive power, three-phase activity coefficient and single-phase power factor, drop into threshold value, the excision threshold value, the overvoltage threshold value, the fault prompting, the display circuit of switching indication, A phase power sample circuit, B phase power sample circuit, the output of C phase power sample circuit is connected with the three-phase overvoltage detection circuit, the output of three-phase overvoltage detection circuit is connected with the reactive power Q comparison circuit, the output of reactive power Q comparison circuit is mended control circuit altogether with three-phase and is divided the benefit control circuit to be connected with three-phase, the output that three-phase is mended control circuit altogether divides the benefit control circuit to be connected with three-phase, mend altogether at three-phase and to be in series with three groups of capacitor C on the control circuit, three-phase divides to mend on the control circuit and is parallel with three groups of capacitor C.
The utlity model has safe and reliable, economical and practical, compensation effect is good, improve the operational efficiency of transformer and guarantee the advantage of transformer security of operation.
Description of drawings
Fig. 1 is a circuit connection diagram of the present utility model.
Embodiment
As shown in Figure 1, the utility model is at the A of three-phase line, B, C is connected with A phase power sample circuit on mutually, B phase power sample circuit, C phase power sample circuit and demonstration three-phase line voltage and phase voltage, triple line electric current and phase current, three phases active power and reactive power, single-phase active power and reactive power, three-phase activity coefficient and single-phase power factor, drop into threshold value, the excision threshold value, the overvoltage threshold value, the fault prompting, the display circuit of switching indication, A phase power sample circuit, B phase power sample circuit, the output of C phase power sample circuit is connected with the three-phase overvoltage detection circuit, the output of three-phase overvoltage detection circuit is connected with the reactive power Q comparison circuit, the output of reactive power Q comparison circuit is mended control circuit altogether with three-phase and is divided the benefit control circuit to be connected with three-phase, the output that three-phase is mended control circuit altogether divides the benefit control circuit to be connected with three-phase, mend altogether at three-phase and to be in series with three groups of capacitor C on the control circuit, three-phase divides to mend on the control circuit and is parallel with three groups of capacitor C.
The utility model preferentially guarantees quality of voltage.When line voltage is too high, even system is in the undercompensation state, also must will drop into the capacitor excision of electrical network immediately, can make line voltage reduction (the capacitor input can make line voltage raise) like this and avoid the overvoltage of capacitor operation." three-phase is mended altogether " is main, and " single-phase branch benefit " is auxilliary.When three-phase or the variation of single-phase reactive power, should take the minimum switching step, reach the The optimal compensation state fast." three-phase is mended altogether " adopts intelligent circulation switching control mode; " single-phase branch benefit " adopts A, B, C loop control mode.
(1) sampling: three-phase voltage and three-phase current, the sampling physical quantity is a reactive power.(2) show: three-phase line voltage and phase voltage, triple line electric current and phase current, three phases active power and reactive power, single-phase active power and reactive power, three-phase activity coefficient and single-phase power factor, input threshold value, excision threshold value, overvoltage threshold value, fault prompting, switching indication.Show three-phase activity coefficient during operation, remainder data shows manually incision, automatically switches to three-phase activity coefficient behind the 5s and shows.(3) the three-phase overvoltage detects: at first judge whether the three-phase overvoltage, as not, then carry out next program, in this way, then carry out excision capacitor program fast, and the input program is blocked, remove until the three-phase overvoltage.(4) reactive power Q relatively: set every grade of three phase reactive power amount, be assumed to be 15kvar, totally 6 grades; Set every grade of single-phase reactive power amount, be assumed to be 5kvar, totally 2 grades; Set three phase reactive power and drop into thresholding Q
LSet three phase reactive power and drop into thresholding Q
CSet single-phase reactive power and drop into thresholding Q
LA, Q
LB, Q
LCSet three phase reactive power and drop into thresholding Q
CA, Q
CB, Q
CCAt first carry out three phase reactive power and judge, as three phase reactive power Q＞Q
L, carry out " three-phase is mended altogether " input program, drop into three-phase capacitor by every grade of 15kvar, as a certain phase reactive power (for example C phase) Q＜5kvar, " three-phase is mended altogether " input program stops, and enters single-phase reactive power and judges (A, B, the circulation of C three-phase), if Q＞Q
LA, then carry out A phase " single-phase branch benefit " input program, drop into the single-phase electricity container by every grade of 5kvar.Otherwise, as three phase reactive power Q＞Q
C, carry out " three-phase is mended altogether " excision program, by every grade of 15kvar excision capacitor, as a certain phase reactive power (for example C phase) Q＜5kvar, " three-phase is mended altogether " excision program stops, and enters single-phase reactive power and judges (A, B, the circulation of C three-phase), if Q＞Q
CA, then carry out A phase " single-phase branch benefit " excision program, by every grade of 5kvar excision single-phase electricity container.(5) " three-phase is mended altogether " program control: press switching cycle control program work, and with " single-phase branch benefit " program control interlocking.(6) " single-phase branch benefit " program control: press A, B, the work of C three-phase switching cycle control program.
Claims (1)
1. intelligent low-pressure imaginary power automatic compensation case, it is characterized in that: at the A of three-phase line, B, C is connected with A phase power sample circuit on mutually, B phase power sample circuit, C phase power sample circuit and demonstration three-phase line voltage and phase voltage, triple line electric current and phase current, three phases active power and reactive power, single-phase active power and reactive power, three-phase activity coefficient and single-phase power factor, drop into threshold value, the excision threshold value, the overvoltage threshold value, the fault prompting, the display circuit of switching indication, A phase power sample circuit, B phase power sample circuit, the output of C phase power sample circuit is connected with the three-phase overvoltage detection circuit, the output of three-phase overvoltage detection circuit is connected with the reactive power Q comparison circuit, the output of reactive power Q comparison circuit is mended control circuit altogether with three-phase and is divided the benefit control circuit to be connected with three-phase, the output that three-phase is mended control circuit altogether divides the benefit control circuit to be connected with three-phase, mend altogether at three-phase and to be in series with three groups of capacitor C on the control circuit, three-phase divides to mend on the control circuit and is parallel with three groups of capacitor C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202409509U CN201733100U (en) | 2010-06-29 | 2010-06-29 | Intelligent low-voltage idle automatic compensation tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202409509U CN201733100U (en) | 2010-06-29 | 2010-06-29 | Intelligent low-voltage idle automatic compensation tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201733100U true CN201733100U (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202409509U Expired - Fee Related CN201733100U (en) | 2010-06-29 | 2010-06-29 | Intelligent low-voltage idle automatic compensation tank |
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| CN (1) | CN201733100U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138272A (en) * | 2011-12-02 | 2013-06-05 | 上海连成（集团）有限公司 | Total-sub compensation mixed compensation cabinet |
| CN104319787A (en) * | 2014-10-11 | 2015-01-28 | 广西诺斯贝电气有限公司 | Reactive power compensation method |
| ES2561904A1 (en) * | 2014-09-01 | 2016-03-01 | Circutor, S.A. | Procedure to compensate reactive energy and capacitor bank to compensate reactive energy (Machine-translation by Google Translate, not legally binding) |
| CN104319787B (en) * | 2014-10-11 | 2017-01-04 | 广西诺斯贝电气有限公司 | Non Power Compensation Process |
| CN108599187A (en) * | 2018-05-25 | 2018-09-28 | 杭州得诚电力科技股份有限公司 | A kind of combined intelligent capacitor and implementation method |
-
2010
- 2010-06-29 CN CN2010202409509U patent/CN201733100U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103138272A (en) * | 2011-12-02 | 2013-06-05 | 上海连成（集团）有限公司 | Total-sub compensation mixed compensation cabinet |
| ES2561904A1 (en) * | 2014-09-01 | 2016-03-01 | Circutor, S.A. | Procedure to compensate reactive energy and capacitor bank to compensate reactive energy (Machine-translation by Google Translate, not legally binding) |
| CN104319787A (en) * | 2014-10-11 | 2015-01-28 | 广西诺斯贝电气有限公司 | Reactive power compensation method |
| CN104319787B (en) * | 2014-10-11 | 2017-01-04 | 广西诺斯贝电气有限公司 | Non Power Compensation Process |
| CN108599187A (en) * | 2018-05-25 | 2018-09-28 | 杭州得诚电力科技股份有限公司 | A kind of combined intelligent capacitor and implementation method |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20110629 |