NDLI: Identification and extraction of PD current pulse shapes in a cable monitoring system

Content Provider	IEEE Xplore Digital Library
Author	Guobin Zhang Hepburn, D.M. Chengke Zhou Xiaodi Song Michel, M.
Copyright Year	2007
Description	Author affiliation: Glasgow Caledonian Univ., Glasgow (Guobin Zhang; Hepburn, D.M.; Chengke Zhou; Xiaodi Song)
Abstract	The most important indicator of the health of electrical plant items is the condition of their insulation for which partial discharge (PD) test or monitoring has been widely recognized as one of the best tools. The strategic importance of plant in the transmission network, and its high replacement and refurbishment cost, has categorized research and development aimed at PD based condition monitoring at transmission voltages (132 kV to 400 kV). This paper presents the signal analysis- a key part for effective condition monitoring, carried out by the present authors on a cable on-line PD measurement system where PDs from the cable under analysis, PDs from local substation plant items and various forms of noise can all exist simultaneously. In this situation, the most critical step lies in the identification and extraction of the pulses associated with cable PD activities. The paper presents an on-line cable condition monitoring system which is installed in a UK utility and the resultant typical data samples. The current PD pulse shapes are categorised into several types using wavelet transform. Based on their characteristics, a method is proposed to separate pulse signals with different shapes. Results presented in this paper prove that the proposed classification method may constitute a step forward in the automatic PD diagnosis.
Starting Page	499
Ending Page	503
File Size	1715561
Page Count	5
File Format	PDF
ISBN	9781905593361
DOI	10.1109/UPEC.2007.4468998
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-09-04
Publisher Place	UK
Access Restriction	Subscribed
Rights Holder	UPEC
Subject Keyword	Partial discharges Condition monitoring Dielectrics and electrical insulation Costs Shape Insulation testing Voltage Pulse shaping methods Signal analysis Research and development
Content Type	Text
Resource Type	Article

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