110kV-level thyristor valve body

Abstract

The invention relates to a 110kV-level thyristor valve body. Each thyristor is a switching device provided with a semiconductor element. The valve body is a rectangular frame in which thyristor valve body modules and a heat dissipation device are arranged. Each thyristor valve body module comprises an absorption capacitor, a water-cooling resistor, the thyristor and a trigger plate, wherein the absorption capacitors and the water cooling resistors are arranged along the transverse direction of the frame, and the thyristors and the trigger plates are connected with the heat dissipation device; and the thyristor valve body modules are parallelly arranged along the longitudinal direction of the frame. The 110kV-level thyristor valve body provided by the invention not only can meet requirements of ultrahigh voltage static reactive power compensation equipment for voltage and current capacity, but also has the advantages of good insulation performance, simple structure, reasonable layout and good heat dissipation effect.

Description

technical field [0001] The invention relates to an electronic switch device, in particular to a thyristor valve body used for controlling UHV static var compensation equipment. Background technique [0002] In order to reduce the amount of shutdown under the condition of UHV DC bipolar blocking, it is necessary to properly configure UHV static var compensation equipment with a certain capacity in some UHV substations of AC transmission channels. UHV static var compensation equipment needs a high-power power electronic switching device to control. Therefore, there is a need for a direct-mounted thyristor valve that can control UHV static var compensation equipment. [0003] Most of the existing 110kV direct-mounted thyristor valves use TCR-type SVC devices as thyristors. The highest voltage level is 66kV and the capacity is 360MVar, which cannot meet the voltage and current capacity requirements of UHV static var compensation equipment. Moreover, due to the unreasonable str...

AI Technical Summary

Problems solved by technology

[0003] Most of the existing 110kV direct-mounted thyristor valves use TCR-type SVC devices as thyristors. The highest voltage level is 66kV and the capacity is 360MVar, which cannot meet the voltage and current capacity requirements of UHV static var compensation equipment.

Moreover, due to the unreasonable structural layout and the poor heat dissipation effect of the heat sink, the direct-mounted thyristor valve is often operated at a high temperature and is prone to failure and even damage, resulting in power system failure.

Moreover, the existing thyristor valve has poor insulation performance due to the lack of insulation measures, and often fails

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