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Multi-column body independent control thyristor valve-controlled controllable shunt reactor device

A thyristor valve, independent control technology, applied in the direction of reactive power compensation, reactive power adjustment/elimination/compensation, etc., to achieve the effect of smooth adjustment, frequent capacity adjustment, and large charging reactive power

Active Publication Date: 2011-11-30
CHINA EPRI SCIENCE & TECHNOLOGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At home and abroad, there is no multi-column body independent control thyristor valve-controlled controllable shunt reactor device proposed by the present invention, which has been put into ultra-high voltage / ultra-high voltage power grid applications

Method used

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  • Multi-column body independent control thyristor valve-controlled controllable shunt reactor device
  • Multi-column body independent control thyristor valve-controlled controllable shunt reactor device
  • Multi-column body independent control thyristor valve-controlled controllable shunt reactor device

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Experimental program
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Embodiment Construction

[0025] The multi-column body independent control thyristor valve-controlled shunt reactor can be used as a line controllable shunt reactor and a bus controllable shunt reactor in two working modes. When used as a line controllable shunt reactor, it can absorb the capacitive charging power of the transmission line, limit the power frequency overvoltage and operating overvoltage, suppress the submerged current, improve the transmission capacity of the line and the stability of the system; it can be used as a controllable parallel busbar Reactor, by adjusting the output reactive power, to ensure the stability of the bus voltage.

[0026] For clarification, the attached figure 2 A typical principle wiring diagram of a thyristor valve-controlled shunt reactor independently controlled by a double-column body is shown as an example to illustrate the working principle of the device of the present invention. Among them, X1a, X1b, X1c are three-phase auxiliary reactors; TK1a, TK2a, TK...

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Abstract

The invention relates to the field of reactive power compensation in power systems, and provides a thyristor valve-controlled controllable shunt reactor device independently controlled by a multi-column body. In the form of a transformer; the windings of each column on the high-voltage side are connected in parallel and connected to the high-voltage power grid through bushings, and the windings of each column on the low-voltage side are respectively led out through bushings, and are controlled independently. According to the needs of actual reactive power compensation, the capacity of each column winding can be designed to be the same or different; each column winding on the low-voltage side is equipped with a bypass circuit breaker, a thyristor valve, and an auxiliary reactor, and the reactive power is realized by controlling the conduction of the thyristor valve. Output. The control method of the thyristor valve can adopt two methods of current zero-crossing switching or phase control to meet the different requirements of reactive power compensation of the system.

Description

technical field [0001] The invention belongs to the field of reactive power compensation in electric power systems, and in particular relates to a thyristor valve-controlled controllable shunt reactor device independently controlled by a multi-column body. Background technique [0002] The distribution of energy and load centers in my country is extremely unbalanced, making it an objective need to use large-capacity, long-distance transmission lines for power transmission. In order to improve transmission capacity and reduce transmission loss, it is advisable to use ultra-high voltage / ultra-high voltage lines for power transmission. However, the huge capacitive charging power, drastic power flow changes and limited insulation margin of EHV / UHV AC transmission lines put forward higher requirements for reactive power regulation and overvoltage suppression of the system, limiting overvoltage and reactive power The contradiction between adjustments is very prominent, and it is ...

Claims

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Application Information

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IPC IPC(8): H02J3/18
CPCY02E40/30
Inventor 邓占锋张帆张振环徐桂芝贾跟卯雷晰武守远于坤山
Owner CHINA EPRI SCIENCE & TECHNOLOGY CO LTD
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