On-line detecting and positioning device for local discharging of electrical insulated combined electrical appliance, and positioning method thereof

A gas-insulated combination and partial discharge technology, which is applied in the direction of measuring devices, fault locations, instruments, etc., can solve the problems of being easily affected by interference, unable to overcome the corona interference of the detection site, and low frequency band of the sensor, etc., to achieve effective GIS partial discharge signal, real-time fast and accurate positioning capabilities, and consistent directional effects
CN1834669AInactive Publication Date: 2006-09-20CHONGQING UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2006-09-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to gas insulation combination electric apparatus partial discharge online detecting and position equipment and its position method. It belongs to electric equipment insulation detecting technique field. This invention includes sensor array consisted by microtrip patch antenna, two groups multiple intelligence selecting switch; two amplify filter, high speed digital collector, computer and control module. The array in this invention is made up by the microtrip patch antennas fixed at GIS basin type insulator, its antenna is made up by rectangular metal patch, medium board, metal platter, coaxial probe type feed line and antenna shielding case. This invention is computer program control, it can online, actual time, quickly, actually poison of GIS inner discharging. This invention can be widely used to electric generator plant booster station and electric network GIS electric substation, it can auto detecting GIS inner partial discharge, and actually poison of partial discharging defect, also it can interconnection run with electric substation and electric generator plant auto monitoring system.
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Description

technical field

[0001] The invention belongs to the technical field of electrical equipment insulation monitoring, and in particular relates to an on-line detection and positioning device and a positioning method for partial discharge 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 compact structure, small footprint, and high reliability. However, defects in GIS due to various reasons will cause partial discharge (PD) under the action of strong electric field, and excite electromagnetic waves with frequency up to several gigahertz (GHz). The continuous development of partial discharge inside the GIS will cause insulation breakdown, lead to power outages, and cause serious losses to the national economy. Since GIS is a good wave conductor, electromagnetic waves can propagate inside GIS and leak outward at the joint between GIS insulation...

Claims

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