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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

Inactive Publication Date: 2006-09-20
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, since the frequency of corona discharge in the air is usually 100-200MHz, the low frequency band of the sensor is too low to overcome the strong corona interference at the detection site, and is easily affected by interference

Method used

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

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Embodiment Construction

[0036] The present invention will be further described below in combination with specific embodiments.

[0037] like Figure 1~4 As shown, an on-line detection and positioning device for partial discharge of a gas-insulated composite electrical appliance, a sensor array composed of a microstrip patch antenna 1, two sets of multi-channel intelligent selection switches 3, two amplification filters 4, a high-speed digital collector 5, Computer 6 and control module 7. The sensor array of the present embodiment is made up of the microstrip patch antenna 1 that is installed in each basin type insulator 14 places of GIS, and its number is determined by the number of basin type insulators 14 of on-site GIS; ; The high-speed digital collector 5 includes 2 data acquisition channels; each sensor is connected to the multi-channel intelligent selection switch 3 through a high-frequency shielded coaxial cable 2 of equal length; a group of multi-channel intelligent selection switches 3 are ...

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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.

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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Application Information

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IPC IPC(8): G01R31/00G01R31/12G01R31/02G01R31/08
Inventor 唐炬张晓星唐世宇莫文强孙才新许中荣杜林彭文雄
Owner CHONGQING UNIV
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