CN103346575A - Adjusting system improving power factors - Google Patents
Adjusting system improving power factors Download PDFInfo
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- CN103346575A CN103346575A CN2013102660321A CN201310266032A CN103346575A CN 103346575 A CN103346575 A CN 103346575A CN 2013102660321 A CN2013102660321 A CN 2013102660321A CN 201310266032 A CN201310266032 A CN 201310266032A CN 103346575 A CN103346575 A CN 103346575A
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- contactor
- transformer
- power
- power factors
- adjusting system
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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 invention discloses an adjusting system improving power factors, and belongs to the technical field of transformer controlling. The adjusting system improving the power factors comprises an air circuit breaker matched with the no-load reactive power of a transformer, an alternating current contactor and a parallel capacitor, and the parallel capacitor sequentially passes through the alternating current contactor and the air circuit breaker and is connected to a low-voltage side 0.4 kV bus of a distribution transformer, wherein a controlling loop connected to the alternating current contactor controls the low-voltage side 0.4kV bus. The adjusting system improving the power factors mainly carries out reactive compensation on the distribution transformer operated under mild load during standby unattended time like night and holidays, and is used for improving the power factors. When the adjusting system improving high-power factors runs with an automatic reactive compensation device in a parallel mode, the using effect of the automatic reactive compensation device can also be improved.
Description
Technical field
The present invention relates to a kind of regulating system that improves power factor.
Background technology
In the distribution transformer power supply, generally all dispose the auto-reactive compensation device in the distribution transformer low-pressure side, move at distribution transformer band normal duty, the auto-reactive compensation device can compensate adjusting automatically according to the variation of load and power factor, and power factor is maintained more than the set point.
But, at night, during non-working time such as festivals or holidays distribution transformer band light(-duty) service, power factor is very low, the auto-reactive compensation device then can not be brought into play its due regulatory function, because the auto-reactive compensation device disposes at normal duty, the capacity of each group shunt capacitor is all relatively big, and the main load or burden without work during light(-duty) service is distribution transformer, capacity is less, throw 1 group of shunt capacitor and all overcompensation can occur, the auto-reactive compensation device will not stop carries out switching, does not have due regulating action, also can shorten the useful life of auto-reactive compensation device.Though it is less that Reactive Power in Distributing Transformer is compared with the operate as normal load, running time is very long, and if things go on like this, idle proportion is just big, will have a strong impact on user's electricity consumption economic benefit, and especially little electricity consumption user influences bigger.
Summary of the invention
Goal of the invention of the present invention is: at the problem of above-mentioned existence, provide a kind of regulating system that improves power factor, mainly the reactive power compensation when non-working time such as night, festivals or holidays distribution transformer band light(-duty) service is used for improving power factor; When making itself and the parallel running of auto-reactive compensation device, also can improve the result of use of auto-reactive compensation device.
The technical solution used in the present invention is as follows:
The regulating system of raising power factor of the present invention, comprise the air circuit, A.C. contactor and the shunt capacitor that are complementary with the no-load transformer reactive power, described shunt capacitor is connected on the low-pressure side 0.4kV bus of distribution transformer by A.C. contactor, air circuit successively, and the control loop that connects on the wherein said A.C. contactor is controlled it.
Owing to adopt said structure, by calculating the no-load transformer reactive power, according to power factor be 0.95 the compensation requirement, the selection capacity is the most near the shunt capacitor of reactive power, air circuit, A.C. contactor and the specifications and models that connect lead, concrete installation site according to distribution transformer and auto-reactive compensation device, selection is with shunt capacitor, air circuit, A.C. contactor, the control loop of A.C. contactor and connection lead installation in position, make to connect one group of fixing shunt capacitor on the low-pressure side 0.4kV bus of distribution transformer, with the reactive power of compensation distribution transformer; Shunt capacitor is connected on the low-pressure side 0.4kV bus that lead is connected to distribution transformer with some by 1 air circuit, 1 A.C. contactor; Carry out the throwing, retreating operation then as required, come the throwing, retreating shunt capacitor by the break-make of control loop control A.C. contactor.When non-working time such as night, festivals or holidays light load the time, compensated part has all withdrawed from automatically, and having only standing part is the transformer compensation, and effect is fine.
The regulating system of raising power factor of the present invention, described control loop comprises fuse, the control coil of A.C. contactor, input button, exit button and the fuse of series connection successively, and the two ends of control loop all are connected on the A.C. contactor by fuse; Wherein be parallel with the make contact of A.C. contactor at the two ends of dropping into button, be in series with the input signal lamp at the branch road of the make contact of A.C. contactor.
Owing to adopt said structure, can drop into button and exit button be controlled whole loop by artificial control, the break-make of controlling A.C. contactor by this control loop is come the throwing, retreating shunt capacitor again; Fuse wherein is set respectively on the two ends in whole loop, and when electric current was excessive, operating personnel's handling safety was guaranteed in fusing The whole control loop; Make contact by A.C. contactor can realize the closed performance of loop energising, thereby realizes the control to A.C. contactor.
The regulating system of raising power factor of the present invention, described no-load transformer reactive power Q
O=i
0Sn/100, wherein i
0Be power transformer no-load current per unit value; Sn is the power transformer rated capacity.
Owing to adopt said structure, can calculate the reactive power of distribution transformer by above-mentioned calculating formula, according to power factor be 0.95 the compensation requirement, the selection capacity is the most near the shunt capacitor of reactive power, connect one group of fixing shunt capacitor at the low-pressure side 0.4kV of distribution transformer bus, with the reactive power of compensation distribution transformer.
In sum, owing to adopted technique scheme, the invention has the beneficial effects as follows:
1, the regulating system of raising power factor of the present invention is simple in structure, and the equipment defective ejaculation is with low cost, and compensation effect is good, and fabrication and installation are simple;
2, the regulating system of raising power factor of the present invention, mainly the reactive power compensation when non-working time such as night, festivals or holidays distribution transformer band light(-duty) service is used for improving power factor; When making itself and the parallel running of auto-reactive compensation device, also can improve the result of use of auto-reactive compensation device;
3, the regulating system of raising power factor of the present invention, it is bigger to be particularly suitable for some load variations amplitudes, and night, the light distribution transformer low-pressure side reactive power compensation of load festivals or holidays need.
Description of drawings
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is structure principle chart of the present invention.
Mark among the figure: the control coil of 1-air circuit, 2-A.C. contactor, 2-1-A.C. contactor, the make contact of 2-2-A.C. contactor, 3-shunt capacitor, 4-connection lead, 5-fuse, 6-exit button, 7-drop into button, 8-drops into signal lamp.
Embodiment
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
As shown in Figure 1, the regulating system of raising power factor of the present invention comprises and the no-load transformer reactive power Q
OThe air circuit 1 that is complementary, A.C. contactor 2 and shunt capacitor 3, described no-load transformer reactive power Q
O=i
0Sn/100, wherein i
0Be power transformer no-load current per unit value; Sn is the power transformer rated capacity; Described shunt capacitor 3 is connected on the low-pressure side 0.4kV bus of distribution transformer by A.C. contactor 2, air circuit 1 successively, and the control loop that connects on the wherein said A.C. contactor 2 is controlled it; Described control loop comprises fuse 5, the control coil 2-1 of A.C. contactor, input button 7, exit button 6 and the fuse 5 of series connection successively, and the two ends of control loop all are connected on the A.C. contactor 2 by fuse 5; Wherein be parallel with the make contact 2-2 of A.C. contactor at the two ends of dropping into button 7, be in series with at the branch road of the make contact 2-2 of A.C. contactor and drop into signal lamp 8.
The regulating system of raising power factor of the present invention can be by calculating the no-load transformer reactive power Q
OAccording to power factor be 0.95 the compensation requirement, the selection capacity is the most near shunt capacitor, air circuit, the A.C. contactor of reactive power and the specifications and models that connect lead, and on the low-pressure side 0.4kV bus that is connected at distribution transformer, concrete installation site according to distribution transformer and auto-reactive compensation device, select a kind of suitable mounting means, control loop and connection lead installation in position with shunt capacitor, air circuit, A.C. contactor, A.C. contactor carry out the throwing, retreating operation then as required.When non-working time such as night, festivals or holidays light load the time, compensated part has all withdrawed from automatically, and having only standing part is the transformer compensation, and effect is fine.
The regulating system of raising power factor of the present invention, simple in structure, the equipment defective ejaculation, with low cost, compensation effect is good, and fabrication and installation are simple, can well improve electricity consumption user's power factor, improve the economic benefit of power supply, electricity consumption both sides and society; Mainly the reactive power compensation when non-working time such as night, festivals or holidays distribution transformer band light(-duty) service is used for improving power factor; When making itself and the parallel running of auto-reactive compensation device, also can improve the result of use of auto-reactive compensation device.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (3)
1. regulating system that improves power factor, it is characterized in that: it comprises and no-load transformer reactive power (Q
O) air circuit (1), A.C. contactor (2) and the shunt capacitor (3) that are complementary, described shunt capacitor (3) is connected on the low-pressure side 0.4kV bus of distribution transformer by A.C. contactor (2), air circuit (1) successively, and wherein said A.C. contactor (2) is gone up the control loop that connects it is controlled.
2. the regulating system of raising power factor as claimed in claim 1, it is characterized in that: described control loop comprises fuse (5), the control coil (2-1) of A.C. contactor, input button (7), exit button (6) and the fuse (5) of series connection successively, and the two ends of control loop all are connected on the A.C. contactor (2) by fuse (5); Wherein be parallel with the make contact (2-2) of A.C. contactor at the two ends of dropping into button (7), be in series with at the branch road of the make contact (2-2) of A.C. contactor and drop into signal lamp (8).
3. the regulating system of raising power factor as claimed in claim 1 or 2 is characterized in that: described no-load transformer reactive power Q
O=i
0Sn/100, wherein i
0Be power transformer no-load current per unit value; Sn is the power transformer rated capacity.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102660321A CN103346575A (en) | 2013-06-28 | 2013-06-28 | Adjusting system improving power factors |
| CN2013203796358U CN203339708U (en) | 2013-06-28 | 2013-06-28 | Adjusting system for improving power factor |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013102660321A CN103346575A (en) | 2013-06-28 | 2013-06-28 | Adjusting system improving power factors |
| CN2013203796358U CN203339708U (en) | 2013-06-28 | 2013-06-28 | Adjusting system for improving power factor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103346575A true CN103346575A (en) | 2013-10-09 |
Family
ID=53871704
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013102660321A Pending CN103346575A (en) | 2013-06-28 | 2013-06-28 | Adjusting system improving power factors |
| CN2013203796358U Expired - Fee Related CN203339708U (en) | 2013-06-28 | 2013-06-28 | Adjusting system for improving power factor |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203796358U Expired - Fee Related CN203339708U (en) | 2013-06-28 | 2013-06-28 | Adjusting system for improving power factor |
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| CN (2) | CN103346575A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734163A (en) * | 2014-11-19 | 2015-06-24 | 马国平 | Power factor compensation device in light-load operating of transformer, connecting system and compensation method thereof |
| CN107819332A (en) * | 2017-11-02 | 2018-03-20 | 成都春源食品有限公司 | A kind of method of transformer reactive compensation |
| CN107959299A (en) * | 2017-12-22 | 2018-04-24 | 中国二冶集团有限公司 | Fixed value reactive power compensator |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346575A (en) * | 2013-06-28 | 2013-10-09 | 葛洲坝集团机电建设有限公司 | Adjusting system improving power factors |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660214A2 (en) * | 1993-12-24 | 1995-06-28 | ICAR S.p.A. | Power factor correcting/filtering set |
| CN2332099Y (en) * | 1998-08-03 | 1999-08-04 | 陈允华 | Complementary electric saving apparatus |
| CN101958553A (en) * | 2010-10-18 | 2011-01-26 | 上海电机学院 | No-load power factor automatic correction system of transformer |
| CN203339708U (en) * | 2013-06-28 | 2013-12-11 | 葛洲坝集团机电建设有限公司 | Adjusting system for improving power factor |
-
2013
- 2013-06-28 CN CN2013102660321A patent/CN103346575A/en active Pending
- 2013-06-28 CN CN2013203796358U patent/CN203339708U/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660214A2 (en) * | 1993-12-24 | 1995-06-28 | ICAR S.p.A. | Power factor correcting/filtering set |
| CN2332099Y (en) * | 1998-08-03 | 1999-08-04 | 陈允华 | Complementary electric saving apparatus |
| CN101958553A (en) * | 2010-10-18 | 2011-01-26 | 上海电机学院 | No-load power factor automatic correction system of transformer |
| CN203339708U (en) * | 2013-06-28 | 2013-12-11 | 葛洲坝集团机电建设有限公司 | Adjusting system for improving power factor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734163A (en) * | 2014-11-19 | 2015-06-24 | 马国平 | Power factor compensation device in light-load operating of transformer, connecting system and compensation method thereof |
| CN107819332A (en) * | 2017-11-02 | 2018-03-20 | 成都春源食品有限公司 | A kind of method of transformer reactive compensation |
| CN107959299A (en) * | 2017-12-22 | 2018-04-24 | 中国二冶集团有限公司 | Fixed value reactive power compensator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN203339708U (en) | 2013-12-11 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 610091 Sichuan City, Qingyang Province, into the District of Chengdu Road, No. 1 Industrial headquarters base A District, building 4 Applicant after: Gezhouba Group Mechanical & Electrical Constrution Co., Ltd. of China Address before: 610091 Sichuan City, Qingyang Province, into the District of Chengdu Road, No. 1 Industrial headquarters base A District, building 4 Applicant before: Gezhouba Group Mechanical & Electrical Constrution Co., Ltd. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: GEZHOUBA GROUP MECHANICAL + ELECTRICAL CONSTRUTION CO., LTD. TO: CHINA GEZHOUBA GROUP MECHANICAL + ELECTRICAL CONSTRUCTION CO., LTD. |
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| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20131009 |