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Method for positioning local discharge of gas-insulator switchgear

A technology of gas insulation combination and positioning method, which is applied in the direction of testing dielectric strength, etc., and can solve problems such as low detection efficiency and the influence of GIS natural vibration

Active Publication Date: 2012-10-03
SHANGHAI MUNICIPAL ELECTRIC POWER CO +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 positioning local discharge of gas-insulator switchgear

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Embodiment Construction

[0014] The following specific examples illustrate the implementation of the present invention, 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 details in this specification can also be based on different viewpoints and applications, and various modifications and changes can be made without departing from the spirit of the present invention.

[0015] The gas insulated switchgear (Gas Insulated Switchgear, hereinafter briefly referred to as GIS) partial discharge positioning method of the present invention can be applied to the positioning and research of partial discharges inside GIS of power plants and substations of power systems.

[0016] The method for locating the partial discharge of the gas-insulated combined electrical appliance of the present invention is as f...

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Abstract

The invention provides a method for positioning the local discharge of a gas-insulator switchgear (GIS), which is a comprehensive position method for positioning local discharge in the GIS by an ultrahigh frequency positioning method and a blending acoustic emission positioning method. At first, the method utilizes the ultrahigh frequency positioning method to carry out preliminary local positionon a local discharge signal to determine a discharge area; secondly, the acoustic emission positioning method is utilized to determine the specific position of a discharge point in the discharge area, thereby enabling the position speed and accuracy of GIS local discharge to be greatly improved.

Description

Technical field [0001] The invention relates to a discharge positioning method, in particular to a partial discharge positioning method of a gas insulated combined electrical appliance. Background technique [0002] Gas insulated switchgear (hereinafter referred to as 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 insulation problems are the main ones. [0003] GIS is easy to introduce defects in the process of manufacturing and installation, such as dust, conductive particles, excessive stress, metal tip, loose interior, etc. With the increase of GIS operating years, the defects will gradually develop serious, and the external environment will be affected by overvoltage or operation. Under the incentive, it will cause breakdown or flashover. Before these insulation failures occur, they are often accompa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
Inventor 江建华高凯
Owner SHANGHAI MUNICIPAL ELECTRIC POWER CO
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