CN203445624U - Reactive power compensation system for low-voltage network - Google Patents

Reactive power compensation system for low-voltage network Download PDF

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Publication number
CN203445624U
CN203445624U CN201320601148.1U CN201320601148U CN203445624U CN 203445624 U CN203445624 U CN 203445624U CN 201320601148 U CN201320601148 U CN 201320601148U CN 203445624 U CN203445624 U CN 203445624U
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China
Prior art keywords
capacitor
low
voltage network
switch
compensation
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Active
Application number
CN201320601148.1U
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Chinese (zh)
Inventor
何伟文
刘辉泉
潘伙权
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GUANGDONG BEIJIANG SWITCH FACTORY CO Ltd
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GUANGDONG BEIJIANG SWITCH FACTORY CO Ltd
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Priority to CN201320601148.1U priority Critical patent/CN203445624U/en
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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

Abstract

The utility model discloses a reactive power compensation system for a low-voltage network. The reactive power compensation system includes an ammeter, a compensation controller, a current transformer for power distribution control, a capacitor, a line incoming switch and an arrester. The ammeter is connected with the current transformer for power distribution control through a wire. The compensation controller is connected with a knife switch and the capacitor respectively through a wire and an RS485 communication line. The arrester is installed and connected to a line outgoing end of the line incoming switch. The reactive power compensation system is simple in control, stable and reliable in electrical lines, easy in capacity increase and less prone to failure.

Description

A kind of reactive compensation system of low-voltage network
Technical field
?the utility model relates to a kind of reactive compensation system, specifically a kind of reactive power compensation control system that is mainly used in low-voltage network.
Background technology
Along with the development of national economy, the task of State Grid's industry is also more arduous.Due to industrial expansion, the reactive loss in electrical network also sharply increases now, and the electrical network quality of power supply is worsened, and also increases the weight of burden and the loss of circuit and transformer simultaneously.Nowadays country is just advocating energy-saving and emission-reduction, so the reactive power compensation in electrical network has attracted more concern.No matter industrial load or appliance load, inductive load larger ratio of accounting all wherein, such as transformer, asynchronous motor and a lot of household electrical appliance are all inductive loads.The natural power factor of these loads is lower, in the electric weight of the reactive power that it consumes in electric power transfer, accounts for very high ratio.The increase of the reactive power in circuit can cause the reduction of power factor (PF), causes the increase of electric current and the decline of system voltage, thereby increases the loss of circuit and equipment, causes the loss of a large amount of electric energy.
Dynamic passive compensation system is contained in step down side, can detect fast and accurately and reactive power compensation these parameters of electric power of voltage, electric current, reactive power, active power and power factor (PF).Can grasp in time the running status of equipment and circuit, thus the normal operation of the assurance equipment of adopting an effective measure.The effect of reactive power compensation: improve quality of voltage, improve transformer utilization factor, reduce equipment investment, improve electrical network transmittability.
Contact type static compensating device can only compensate stable power circuit at present, when line voltage distribution is unstable, can not effectively be acted on, and cannot provide one to stablize lasting compensation to electric power system.And the connection of present electric wiring is comparatively complicated, is inconvenient to control, and easily breaks down.
Summary of the invention
The technical problems to be solved in the utility model is to provide a kind of reactive compensation control system of low-voltage network, and it is convenient to control, and increase-volume is convenient, and stable performance, is difficult for breaking down.
In order to solve the problems of the technologies described above, the utility model is taked following technical scheme:
A kind of reactive compensation system of low-voltage network, comprise ammeter and compensating controller, also comprise distribution control Current Transformer, capacitor, service entrance switch and lightning arrester, described ammeter is controlled Current Transformer by wire and distribution and is connected, compensating controller is by wire respectively at being connected with capacitor with knife switch, and lightning arrester is installed in the leading-out terminal of service entrance switch.
Described service entrance switch is switch with knifeshaped fuse.
Described capacitor and control capacitance switch, capacitor fling-cut switch are integrated.
Described compensating controller is RS485 connection with the wire that is connected between capacitor.
Described capacitor comprises single-phase electricity container and the three-phase capacitor being connected in parallel.
Between described single-phase electricity container and three-phase capacitor, by RS485 connection, connect.
The utility model is controlled simple, and electric wiring is reliable and stable, saves space, and increase-volume is convenient, convenient for maintaining and maintenance, and lightning arrester is contained in to the leading-out terminal of inlet wire cutter, be difficult for breaking down.
Accompanying drawing explanation
Accompanying drawing 1 is the utility model line principle schematic diagram.
Embodiment
For the ease of those skilled in the art's understanding, below in conjunction with accompanying drawing, the utility model will be further described.
As shown in Figure 1, the utility model has disclosed a kind of reactive compensation system of low-voltage network, comprise ammeter 1 and compensating controller, and distribution is controlled Current Transformer 3, capacitor, service entrance switch 2 and lightning arrester 4, described ammeter 1 is controlled Current Transformer 3 by wire and distribution and is connected, compensation is controlled and is connected with capacitor with service entrance switch respectively by wire, and lightning arrester 4 is installed in the leading-out terminal of service entrance switch 2, i.e. lightning arrester 4 and capacitor connection arranged side by side.Lightning arrester is contained in to the leading-out terminal of knife switch, better plays lightning protection effect.
In addition,, in order to improve security performance, service entrance switch is made as to switch with knifeshaped fuse.Capacitor and control capacitance switch, capacitor fling-cut switch are integrated, are convenient to management and control.
Described compensating controller is RS485 connection with the wire that is connected between capacitor.Capacitor comprises single-phase electricity container 6 and three-phase capacitor 5, and this single-phase electricity container and three-phase capacitor are connected in parallel.Between single-phase electricity container and three-phase capacitor, by RS485 connection, connect.
In native system, do not take compensation sampled current transformer.

Claims (6)

1. the reactive compensation system of a low-voltage network, comprise ammeter (1) and compensating controller, it is characterized in that, also comprise distribution control Current Transformer (3), capacitor, knife switch (2) and lightning arrester (4), described ammeter is controlled Current Transformer by wire and distribution and is connected, compensating controller is by wire respectively at being connected with capacitor with knife switch, and lightning arrester is installed in the leading-out terminal of service entrance switch.
2. the reactive compensation system of low-voltage network according to claim 1, is characterized in that, described knife switch is switch with knifeshaped fuse.
3. the reactive compensation system of low-voltage network according to claim 2, is characterized in that, described capacitor and control capacitance switch, capacitor fling-cut switch are integrated.
4. the reactive compensation system of low-voltage network according to claim 3, is characterized in that, described compensating controller is RS485 connection with the wire that is connected between capacitor.
5. the reactive compensation system of low-voltage network according to claim 4, is characterized in that, described capacitor comprises single-phase electricity container (6) and the three-phase capacitor (5) being connected in parallel.
6. the reactive compensation system of low-voltage network according to claim 5, is characterized in that, between described single-phase electricity container and three-phase capacitor, by RS485 connection, connects.
CN201320601148.1U 2013-09-27 2013-09-27 Reactive power compensation system for low-voltage network Active CN203445624U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320601148.1U CN203445624U (en) 2013-09-27 2013-09-27 Reactive power compensation system for low-voltage network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320601148.1U CN203445624U (en) 2013-09-27 2013-09-27 Reactive power compensation system for low-voltage network

Publications (1)

Publication Number Publication Date
CN203445624U true CN203445624U (en) 2014-02-19

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CN201320601148.1U Active CN203445624U (en) 2013-09-27 2013-09-27 Reactive power compensation system for low-voltage network

Country Status (1)

Country Link
CN (1) CN203445624U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103475008A (en) * 2013-09-27 2013-12-25 广东北江开关厂有限公司 Reactive power compensation system of low-voltage power distribution network

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103475008A (en) * 2013-09-27 2013-12-25 广东北江开关厂有限公司 Reactive power compensation system of low-voltage power distribution network

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