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A HVDC grounding switch and a stationary contact component thereof

A technology of grounding switch and high-voltage direct current, which is applied in the field of high-voltage direct current grounding switch and its static contact assembly, and can solve the problems of difficulty in manufacturing the grounding switch and high cost

Active Publication Date: 2014-12-31
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a static contact assembly of a high-voltage direct current earthing switch to solve the problems of difficulty in manufacturing and high cost of the existing earthing switch; DC grounding switch

Method used

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  • A HVDC grounding switch and a stationary contact component thereof
  • A HVDC grounding switch and a stationary contact component thereof
  • A HVDC grounding switch and a stationary contact component thereof

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Embodiment Construction

[0017] Embodiments of the high voltage direct current grounding switch of the present invention: as Figure 1-6 As shown, it mainly includes a base 8, a moving contact 12, a static contact 2, a grounding knife 7 and an operating mechanism 4. The upper end of the static contact 2 is fixed with a pipe bus clip 6, through which the static The contact 2 is directly positioned and suspended on the pipe busbar 1, and a shielding system is also provided on the pipe busbar clamp 6. The shielding system is composed of an upper pressure equalizing ring 5 and a lower pressure equalizing ring 3, wherein the upper pressure equalizing ring 5 is fixed on the pipe busbar The top of the bus clamp 6, the lower equalizing ring 3 is fixed on the bottom of the tube bus clamp 6, the static contact 2, the tube bus clamp 6, the upper equalizing ring 5 and the lower equalizing ring 3 form a static contact assembly; the static contact 2. It includes a cylindrical guide cover 21, the lower end of which ...

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Abstract

The invention discloses a HVDC grounding switch and a stationary contact component thereof. The grounding switch comprises a base, a moving contact and a stationary contact. The base is hinged with a folding grounding knife-switch which can swing up and down. The moving contact is fixedly arranged at the top of the grounding knife-switch. The stationary contact is located over the grounding knife-switch and is plugged with the moving contact in a matched manner to implement a switching-on when the grounding knife-switch swings upwardly and becomes straight. The grounding switch also comprises a tube bus clamp for suspending the stationary contact fixedly on the tube bus, a upper grading ring connected fixedly on the top of the tube bus clamp, and a lower grading ring connected fixedly on the bottom of the tube bus clamp, wherein the stationary contact is positioned in the line of centers of the upper and lower grading rings. Since the stationary contact is suspended fixedly on the tube bus directly by the tube bus clamp, a post insulator that supports the stationary contact can be omitted so as to reduce a cost and to prevent the manufacture difficulty of the insulator from being increased due to a higher requirement of the DC system on the insulator's creep distance.

Description

technical field [0001] The invention relates to a high-voltage DC grounding switch and its static contact assembly. Background technique [0002] DC transmission has the characteristics of long transmission distance, large transmission capacity, small line loss, and easy control and adjustment. It has been more and more widely used in power systems. The transformation from traditional local balance to overall balance will play a major role. At the same time, the demand for DC grounding switches used in DC transmission projects has also increased sharply. The traditional DC grounding switch is mainly divided into two types, one is the single-arm straight swing type, and the other is the single-arm folding and plug-in type. The disadvantage of the single-arm straight swing type is that it is , to ensure that the grounding knife has enough swing space, occupy a large area of ​​the power station, increase the construction cost of the power station, and the single-arm folding pl...

Claims

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Application Information

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IPC IPC(8): H01H31/26H01H31/02H01H3/40
CPCH01H31/28H01H31/003
Inventor 王占杰孙玉洲马永旭胡延涛夏立国
Owner STATE GRID CORP OF CHINA
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