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Method for detecting partial discharge of gas insulated switchgear

A gas-insulated combination and partial discharge detection technology, which is applied in the direction of testing dielectric strength, can solve the problems of GIS inherent vibration, low detection efficiency, etc., and achieve the effect of low efficiency and accurate and effective positioning

Active Publication Date: 2010-02-24
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Abstract
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Problems solved by technology

However, if acoustic emission technology is used to detect GIS partial discharge, the detection efficiency will be low, and it will be affected by the natural vibration of GIS.

Method used

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  • Method for detecting partial discharge of gas insulated switchgear

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Embodiment Construction

[0019] The implementation of the present invention is described below through preferred specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific examples, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0020] The gas insulated switchgear (Gas Insulated Switchgear, hereinafter referred to as GIS) partial discharge detection method described in the present invention can be applied to the monitoring, positioning and research of partial discharge inside the GIS of power plants and substations in power systems.

[0021] see figure 1 , a gas-insulated combined electric appliance partial discharge detection method process flow of a pr...

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Abstract

The invention provides a method for detecting partial discharge of a gas insulated switchgear (GIS). The method is a comprehensive detecting method combining ultra-high frequency detection and acoustic emission detection to monitor and position the partial discharge in the GIS. The method for detecting the partial discharge of the GIS is more effective in the monitoring of the partial discharge ofthe GIS, and is more scientific and favorable for the scientific research of the partial discharge of the GIS because the acquired ultra-high frequency characteristic data and acoustic emission characteristic data can be compared and analyzed mutually; and after the initial positioning of the ultra-high frequency characteristic data, acoustic emission detection positioning is performed in a smallrange of discharge area, so the problem of low efficiency of the acoustic emission detection is solved, the positioning is more accurate and effective, and the accurate position of a discharge pointcan be discovered more quickly.

Description

technical field [0001] The invention relates to a discharge detection method, in particular to a partial discharge detection method of a gas-insulated combined electric appliance. Background technique [0002] Gas Insulated Switchgear (GIS) is widely used in power plants and substations of power systems because of its high insulation, compact structure, small footprint, and high reliability. However, some problems will be encountered during use, among which the insulation problem is the main one. [0003] GIS is easy to introduce defects during the manufacturing and installation process, such as dust, conductive particles, excessive stress, metal tips, loose interior, etc. With the increase of GIS operation years, the defects will gradually develop and become serious. Under the inducement, it will cause breakdown or flashover phenomenon. Before these insulation faults occur, they are often accompanied by partial discharge. The appearance of partial discharge often indicat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12
Inventor 高凯江建华杨凌辉
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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