GIS risk evaluation method and GIS risk evaluation system based on partial discharge live detection

Abstract

The invention discloses a GIS risk evaluation method and a GIS risk evaluation system based on partial discharge live detection. According to the method of the invention, a partial discharge signal is acquired through an ultrahigh-frequency antenna and an ultrasonic wave sensor, and through analyzing partial discharge type and analyzing partial discharge severity , the type and severity of a certain partial discharge are obtained; furthermore accurate positioning on a partial discharge source is realized according to two ultrahigh-frequency signals or two ultrasonic wave signals; and risk grade can be accurately evaluated comprehensively according to operation information and maintenance information of the GIS. The GIS risk evaluation method prevents a defect in evaluation according to single kind of data such as partial discharge amplitude or partial discharge frequency. Furthermore the GIS risk evaluation method and the GIS risk evaluation system have advantages of high partial discharge detection sensitivity and high risk evaluation accuracy. The GIS risk evaluation system realizes simple structure and convenient operation and supplies technical guidance for improving partial discharge live detection risk evaluation accuracy, thereby realizing advantages of high detection sensitivity and high evaluation accuracy.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a GIS risk assessment method and system based on partial discharge electrification detection. Background technique [0002] Gas Insulated Substation (GIS for short) is based on SF 6 Gas-insulated metal-enclosed switchgear used as an insulating medium, GIS has been widely used at home and abroad since the 1960s due to its small footprint, high operational reliability, long maintenance cycle, and convenient transportation and installation. In the past, it was generally believed that GIS belonged to equipment that did not require maintenance or had a long maintenance period. However, with the widespread application of GIS, the reliability of GIS equipment has gradually attracted the attention of the international community and the power sector. Judging from nearly 40 years of operating experience, insulation faults have always been one of the important factors a...

AI Technical Summary

Problems solved by technology

In the analysis of partial discharge detection results, the single amplitude and discharge frequency analysis of the detection results can no longer fully evaluate the hazards of discharge sources. It is necessary to establish a more detailed and comprehensive assessment system for the risk degree of partial discharge sources in GIS

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