Static var compensator (SVC) and DC ice melting device and realization method thereof

A technology of static var compensation and DC ice melting, which is applied in the directions of reactive power compensation, reactive power adjustment/elimination/compensation, overhead installation, etc., to achieve the effects of prolonging service life, improving operating environment, and improving use efficiency

Inactive Publication Date: 2010-03-17
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no such reconfigurable static var compensation (SVC) and DC deicin

Method used

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  • Static var compensator (SVC) and DC ice melting device and realization method thereof
  • Static var compensator (SVC) and DC ice melting device and realization method thereof
  • Static var compensator (SVC) and DC ice melting device and realization method thereof

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Embodiment Construction

[0018] The following is a preferred embodiment of the present invention, and the technical solutions realized by the present invention will be further described below in conjunction with the accompanying drawings.

[0019] The invention proposes a static var compensation (SVC) and direct current ice-melting device and a realization method thereof. The primary equipment of the device mainly includes thyristor rectifiers, reactors, AC and DC filters, isolating switches, and zinc oxide arresters. The reconfigurable main circuit is as follows: figure 1 As shown, the thyristor rectifier is also used as a thyristor-controlled reactor type TCR valve group, and the reactor can be used as a commutation reactor and a smoothing reactor in the DC ice-melting mode, and as a thyristor-controlled reactor in the SVC mode. (TCR) phase-controlled reactor, and the thyristor rectifier and the reactor are detachable structures, by setting isolating switches between each detachable structure, seque...

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Abstract

The invention proposes a static var compensator (SVC) and DC ice-melting device and a realization method thereof. Primary equipment comprises a thyristor rectifier, a reactor, an AC/DC filter, a disconnecting switch, a zinc oxide arrester and the like, wherein the thyristor rectifier is also taken as the thyristor controlled reactor (TCR) valve bank; the reactor is the phase-change smoothing TCR;the thyristor rectifier and the reactor are designed into the detachable structures, therefore, the thyristor rectifier and the reactor are detached and reassembled to form different topological structures by arranging the disconnecting switch between the detachable structures and operating the line disconnecting switch, so as to realize the switchover between the DC ice-melting function and the SVC function and solve the problem of the heavy-current high-voltage and high-capacity DC ice-melting device and the problem of system reactive power compensation.

Description

technical field [0001] The invention belongs to the technical field of power electronics application, and mainly relates to a static var compensation (SVC) and DC ice-melting complete set. As a static var compensation device. Background technique [0002] At the beginning of 2008, severe rain, snow and freezing disasters occurred in central China, southwestern my country, and eastern China. The power grid facilities were seriously covered with ice and snow, and frequent tripping of disconnected and towered lines caused huge losses to the power grid. In some areas, the power grid even suffered a devastating blow. DC deicing technology is an effective deicing method, which is suitable for transmission lines with voltage levels of 220kV and above. However, due to the relatively small time and frequency of ice disasters, if the DC ice melting equipment can only be used as an ice melting device, the economy is poor. In order to improve the utilization rate of equipment and main...

Claims

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Application Information

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IPC IPC(8): H02J3/18H02G7/16
CPCY02E40/30
Inventor 荆平武守远徐桂芝贾跟卯李长宇张晓薇刘洋张帆
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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