CN101707348A - Intelligent integrative circuit with electricity leakage protection and reactive compensation - Google Patents
Intelligent integrative circuit with electricity leakage protection and reactive compensation Download PDFInfo
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- CN101707348A CN101707348A CN200910252266A CN200910252266A CN101707348A CN 101707348 A CN101707348 A CN 101707348A CN 200910252266 A CN200910252266 A CN 200910252266A CN 200910252266 A CN200910252266 A CN 200910252266A CN 101707348 A CN101707348 A CN 101707348A
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- compensation
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- dynamic controller
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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
Abstract
The invention discloses an intelligent integrative circuit with electricity leakage protection and reactive compensation, which comprises a sampling mutual inductor and a dynamic controller, wherein the sampling mutual inductor is connected on a three-phase line, the output ends of the sampling mutual inductor are respectively connected with a sampling signal interface of the dynamic controller, and a main circuit comprises an isolation knife switch, an electricity leakage protection switch, a double-head knife switch and a reactive compensation circuit. A control signal interface of the dynamic controller is connected with a dynamic reactive compensation unit by a control line, the dynamic compensation unit comprises a plurality of capacitance switching switches and a compensation capacitor which is connected with the capacitance switching switches, the switching of the compensation capacitor is controlled by a thyristor composite switch, and the thyristor composite switch is controlled by the dynamic controller. The invention also has the functions of electricity leakage protection and reactive power compensation, enhances the compensation effect greatly and avoids the defects of over-compensation, under-compensation and the like caused by three-phase co-compensation. An intelligent composite switch is adopted by a switching device, zero-crossing switching is adopted by a thyristor, passive switchover is adopted, the generation of operation overvoltage is reduced, the reliability is high, and the service life is long.
Description
Technical field
The invention belongs to the distribution system that is used for earth leakage protective, phase-splitting reactive compensation in the three-phase line.
Background technology
The economy of power system operation and the quality of power supply and reactive power have significant relationship.Idle is a kind of indispensable power of electric power system.A large amount of inductive loads and the reactive power loss in the electrical network require system that enough reactive powers are provided, otherwise line voltage will descend, and quality of voltage can not get guaranteeing.Simultaneously, the unreasonable distribution of reactive power also will cause line loss to increase, and reduce the economy of power system operation.
The reactive power that generator provides, relative load and network are far from being enough to the demand of reactive power, and extremely uneconomical.So, in electric power system, adopt various reactive power compensating apparatus to carry out reactive power compensation.It is the important means that guarantees the quality of power supply and realize Economical Operation of Power Systems.The local compensation that carries out reactive power in low voltage electric network is the important step of whole power system reactive power compensation, mainly adopts shunt capacitor, and it comprises that fixed capacitor compensates and modes such as the dynamic compensation of automatic switching capacitor and both mixed compensations.Electric load is a transient change, the reactive power that it needs also changes at any time, in order to keep reactive balance, will be according to the timely switched capacitor of the variation of load or burden without work, traditional low pressure dynamic passive compensation equipment is with the fling-cut switch of mechanical switch as capacitor, mechanical switch not only responsiveness is slow, also can produce phenomenons such as the impact of shoving, overvoltage, arc reignition, and switch itself and power capacitor all damage easily.According to statistics, in the past the automatic switching reactive power compensation device for capacitor of Shi Yonging after 3 years spoilage reach 75%, spoilage is high.
Summary of the invention
The purpose of this invention is to provide a kind of intelligent integrative circuit with earth leakage protective, reactive power compensation, have the function of earth leakage protective, power back-off simultaneously, compensation effect improves greatly, has avoided three-phase to compensate the mistake that causes altogether and has mended, owes defectives such as benefit.The intelligent compound switch that switching device adopts, the thyristor operating passing zero, passive switching has reduced the generation switching overvoltage, reliability height, long service life.
Technical scheme of the present invention is as follows:
A kind of intelligent integrative circuit with earth leakage protective, reactive power compensation; include sampling mutual inductor, dynamic controller; sampling mutual inductor inserts on the three-phase line; output is linked into the sampled signal interface of described dynamic controller respectively, and main circuit is made up of disconnection switch, earth leakage circuit-breaker, double end knife switch and reactive power compensation circuit.The control signal interface of described dynamic controller connects the dynamic passive compensation unit by control line, the dynamic compensation unit is to be made of some capacitor switching switches and coupled building-out capacitor, the switching of building-out capacitor is by the control of thyristor combination switch, and described thyristor combination switch is controlled by dynamic controller.
Described circuit is installed in earth leakage protective main circuit and phase splitting compensation circuit in the one station power distribution cabinet.Be connected with sampling mutual inductor on the three-phase line, sampled signal is fed back to dynamic controller, the switching of control compensation unit.
It is fast that the present invention compensates response speed, improve power factor in real time, energy-saving effect is more remarkable. and capacitor switching does not have impact, no-flashy-flow, no transient process switching, the operational reliability height, operating cost is low, long service life, suppress harmonic wave, safe and reliable to operation, installed discharge resistance (being the discharge signal lamp), capacitor does not need precharge, suppress voltage fluctuation, improve quality of voltage, reduce network loss and transformer loss, increase the load transformer capacity. carry out the dynamic mixed compensation of phase-splitting, automatically withdraw from during power failure, resume operation automatically after sending electricity; Multistage compensation one-time-reach-place, compensation back power factor is greater than 0.95 (under the capacity configuration appropriate condition).
Description of drawings
Fig. 1 is a circuit structure diagram of the present invention.
Embodiment
Referring to accompanying drawing; the intelligent integrative circuit of band earth leakage protective, reactive power compensation; include three sampling mutual inductors 2, movement controller 3; the output of sampling mutual inductor 2 is linked into the sample connection of dynamic controller 3 respectively, and main circuit is made up of disconnection switch 12, earth leakage circuit-breaker 4, double-throw knife switch 8 and reactive power compensation circuit.The dynamic compensation unit is to be made of air switch 10, dynamic controller 3, miniature circuit breaker 13, the coupled building-out capacitor 5 of some capacitor switching circuit, dynamic controller 3 connects the dynamic compensation unit by control line, the switching of building-out capacitor is by 9 controls of thyristor combination switch, and described thyristor combination switch 9 is by dynamic controller 3 controls.Be connected with indication instrument transformer 1, indicator current table 6, change over switch 11, instructed voltage table 7 on the secondary auxiliary route respectively.
Claims (2)
1. be with the intelligent integrative circuit of earth leakage protective, reactive power compensation; it is characterized in that: include sampling mutual inductor, dynamic controller; sampling mutual inductor inserts on the three-phase line; output is linked into the sampled signal interface of described dynamic controller respectively, and main circuit is made up of disconnection switch, earth leakage circuit-breaker, double end knife switch and reactive power compensation circuit.The control signal interface of described dynamic controller connects the dynamic passive compensation unit by control line, the dynamic compensation unit is to be made of some capacitor switching switches and coupled building-out capacitor, the switching of building-out capacitor is by the control of thyristor combination switch, and described thyristor combination switch is controlled by dynamic controller.
2. the intelligent integrative circuit of band earth leakage protective according to claim 1, reactive power compensation is characterized in that: described circuit is installed in earth leakage protective main circuit and phase splitting compensation circuit in the one station power distribution cabinet.Be connected with sampling mutual inductor on the three-phase line, sampled signal is fed back to dynamic controller, the switching of control compensation unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252266A CN101707348A (en) | 2009-11-27 | 2009-11-27 | Intelligent integrative circuit with electricity leakage protection and reactive compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252266A CN101707348A (en) | 2009-11-27 | 2009-11-27 | Intelligent integrative circuit with electricity leakage protection and reactive compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101707348A true CN101707348A (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910252266A Pending CN101707348A (en) | 2009-11-27 | 2009-11-27 | Intelligent integrative circuit with electricity leakage protection and reactive compensation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101707348A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969726A (en) * | 2012-11-16 | 2013-03-13 | 成都星宇节能技术股份有限公司 | Intelligent dynamic reactive compensation device |
| CN105529682A (en) * | 2016-03-08 | 2016-04-27 | 宁波高新区鼎诺电气有限公司 | Zero-sequence protection circuit and system applying same |
-
2009
- 2009-11-27 CN CN200910252266A patent/CN101707348A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969726A (en) * | 2012-11-16 | 2013-03-13 | 成都星宇节能技术股份有限公司 | Intelligent dynamic reactive compensation device |
| CN105529682A (en) * | 2016-03-08 | 2016-04-27 | 宁波高新区鼎诺电气有限公司 | Zero-sequence protection circuit and system applying same |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100512 |