Grounding switch position structure at valve sides of three-winding converter transformer and quadruple valve converter transformer

Abstract

The invention provides a grounding switch position structure at valve sides of a three-winding converter transformer and a quadruple valve converter transformer, which comprises head ends of windings at valve sides of three three-winding converter transformers a1, a2, b1, b2, c1 and c2, tail ends of the windings at the valve sides of the three three-winding converter transformers x1, x2, y1, y2, z1 and z2, grounding switches a11, b11, c11, x22, y22 and z22, a fireproofing wall and a sleeve, wherein all the grounding switches are arranged on the fireproofing wall, and the head ends of the windings a1, b1 and c1 are respectively and correspondingly connected with the grounding switches a11, b11 and c11, and the tail ends of the windings x2, y2 and z2 are respectively and correspondingly connected with the grounding switches x22, y22 and z22. With the grounding switch position structure, the shorter distance between each grounding switch and a corresponding winding terminal can be realized, the switch arm length of the grounding switches is smaller, and all the grounding switches have no mutual noninterference on valve opening and closing operations.

Description

technical field [0001] The invention belongs to the field of high-voltage direct current transmission, and relates to a ground knife position structure on the valve side of a three-winding converter converter and a four-valve valve hall converter converter. Background technique [0002] In a high-voltage direct current transmission project, a ground knife is usually arranged at the head end of the valve side winding of the converter transformer (hereinafter referred to as the converter transformer). The configuration points of these ground knives all bear a certain AC voltage and a higher DC voltage. Unlike AC voltage, DC voltage does not have zero crossings. Therefore, when the equipment is out of operation, there must be considerable charge remaining in the stray capacitance inside the equipment and between the equipment and the ground. The function of the ground knife on the side of the converter valve is to guide the charge stored in the stray capacitance inside the eq...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the position of the valve side of the three-winding converter transformer-four valve valve hall converter transformer is small, and the safety arrangement of the ground knife is difficult.

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