Analytical Method of GIS Faults Based on Ultrasonic Diagnosis

doi:10.11930/j.issn.1004-9649.20160145

Abstract

Abstract: To improve on-site detection efficiency of partial discharge of gas insulated switchgear (GIS), a study is made in this paper on the analytical methods of GIS fault based on ultrasonic diagnosis. According to plenty of data collected on site, the time domain and phase distribution features of ultrasonic signals of typical GIS partial discharge are analyzed, and the differences in time domain features and frequency domain distribution between partial discharge signals and mechanical vibration signals are identified. The paper also studies the application of the joint ultrasonic and electromagnetic wave localization method, the ultrasonic time-delay localization method, and the ultrasonic wavelet time-frequency localization method in on-site GIS partial discharge detection. The detecting results indicate that the proposed methods are reliable in accuracy and correctness.

Key words: ultrasonic, gas insulated switchgear, partial discharge, time domain features, frequency domain distribution, localization method

CLC Number:

TM835

ZHOU Dianbo, DING Dengwei, GAI Shicheng, JIA Zhijie, WANG Jie, MA Xiaomin, YAO Chenguo. Analytical Method of GIS Faults Based on Ultrasonic Diagnosis[J]. Electric Power, 2018, 51(4): 53-60.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.20160145

https://www.electricpower.com.cn/EN/Y2018/V51/I4/53

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