NDLI: Partial discharge severity diagnosis and assessment: a case of high-voltage electrode defect in GIS

Content Provider	IEEE Xplore Digital Library
Author	Bo Qi Chengrong Li Bibo Geng Zhen Hao Jinxiang Chen Hao You Yihong Lin
Copyright Year	2010
Description	Author affiliation: Fujian Electric Power Test and Research Institute, Fuzhou, China (Jinxiang Chen; Hao You; Yihong Lin) \|\| Beijing Key Laboratory of High Voltage & EMC, North China Electric Power University, China (Bo Qi; Chengrong Li; Bibo Geng; Zhen Hao)
Abstract	A major cause of insulation failure in GIS equipments is due to the high-voltage electrode defect, which usually occurs at the interface formed by metallic conductor, insulator and SF6. The present research is designed to diagnose and assess the severity levels of the partial discharge (PD) provoked by high-voltage electrode defect on GIS insulator surface. With the application of gradually increased voltage, long term tests were conducted on a well-established 252 kV GIS experiment platform to observe the entire evolution process of partial discharge from its very initiation till the eventual flashover. Real time measurement was also undertaken during the tests to capture the trend curve of partial discharge as a result of test time, the scatter plot, histogram, grey-scale map, and the time-frequency map of the partial discharge. The test results indicate that 1) partial discharge initiated by high-voltage electrode defects undergoes three elocutionary phases, namely, the inception phase, the developing phase and the threatening phase; 2) as partial discharge exacerbates, the phase distribution is widening and corresponding shape changes occur in the scatter plot, histogram, grey-scale map, the time-frequency map and the ultraviolet images. It is suggested that the features of phase distribution and the corresponding spectrums be used as important criterion in diagnosing and assessing the severity levels of the partial discharge triggered by high-voltage electrode defect on GIS insulator surface.
Starting Page	212
Ending Page	215
File Size	483110
Page Count	4
File Format	PDF
ISBN	9781424482832
e-ISBN	9781424482863
DOI	10.1109/ICHVE.2010.5640828
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Electrodes GIS Histograms Partial Discharge Geographic Information Systems High-Voltage Electrode Defect Discharges Flashover Acoustics Severity Diagnosis and Assessment
Content Type	Text
Resource Type	Article

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