Abstract
For analyzing partial discharge ultrasonic wave characteristic on typical defects in SF6 gas insulation switchgear (GIS), a 110 kV GIS was taken as an object to design and simulate the typical partial discharge models in GIS� There are point electrode model on bus and cavity of GIS, floating electrode model, air interstice model in insulator, metal particle and iron core electromagnetic shock models. PD signals on different defects were thus detected with the ultrasonic method� The experimental results indicated that the ultrasonic signals of different defects showed different characteristics in waveform, amplitude and phase resolved partial discharge chart, which is helpful in PD pattern recognition for GIS�
Highlights
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The Gas insulation switchgear (GIS) internal insulation defect of the vast majority comes from the development of partial discharge, so the detection of partial discharge is an effective means of preventing GIS insulation fault[1,2,3]
Ultrasound can detect mechanical wave produced by the particle motion, on general engineering application of the ultrasonic to distinguish the motion of particles. Combines both the ultrasonic method and digital measurement, this paper aims to detect partial discharge model typical discharge or free particles to beat the ultrasonic signal, after digital processing, spectra and statistics can be obtained, for further study of different defect types of partial discharge characteristics to provide data and test basis
Summary
If the conference editors chose to provide print-ready PDF documents to the publisher, you have to submit high-resolution PDF file with all fonts embedded (see PDF guidelines) instead of the sources files. In this case, please remember that no final corrections will be made by the publisher. Gas insulation switchgear (GIS) as an important equipment in the power system operation, in the event of failure, will cause huge economic losses and adverse social impact. The operation reliability of the GIS is very important. Ultrasound is one of the hot methods of domestic and foreign research of GIS partial discharge [4], this method diagnosis of GIS by detecting partial discharge for ultrasonic signal, , so as to realize the accurate extraction of partial discharge signals, can be more comprehensive research intrinsic characteristics of partial discharge[5]
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