Multi-column body-controllable parallel reactor device

Abstract

The invention provides a multi-column body-controllable parallel reactor device. A controllable parallel reactor is formed by adopting a transformer structure; a main iron core adopts a multi-column structure; after being connected in parallel, all column windings at the high-voltage side are respectively led out by sleeves and then are connected into a high-voltage grid; all column windings at the low-voltage side are respectively led out by sleeves, and are respectively and independently controlled; when reactive adjustment of the multi-column body-controllable parallel reactor device adopts a current zero-crossing switching mode of thyristor valves, graded adjustment of the capacity of the controllable parallel reactor can be realized by controlling the conduction and cut-off of different thyristor valves; when the reactive adjustment adopts a phase control mode, continuous adjustment of the controllable parallel reactor can be realized by controlling the triggering angles of the different thyristor valves. Therefore, the multi-column body-controllable parallel reactor device provided by the invention has the advantages that grading adjustment and continuous adjustment are combined, so that different requirements for reactive compensation of a power system can be met.

Description

technical field [0001] The invention relates to the technical field of reactive power compensation in electric power systems, and more specifically, relates to a multi-column main body controllable shunt reactor device. Background technique [0002] The distribution of primary energy sources such as coal and water conservancy in my country is extremely unbalanced with load centers, 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 promin...

AI Technical Summary

Problems solved by technology

[0003] However, the existing controllable shunt reactors are mainly graded controllable reactors, and the graded controllable shunt reactors can only be controlled by the conduction and cut-off of the thyristor valve. Level (within the rated capacity of the controllable shunt reactor, divided into several levels according to a certain ratio), the continuous adjustment of the capacity cannot be realized, so it is difficult to meet the different requirements of reactive power compensation in the power system

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