NDLI: Study on UWB frequency characteristics of partial discharge as a criterion of aging degree of stator winding insulation

Content Provider	IEEE Xplore Digital Library
Author	Song Jiancheng Xie Hengkun Cheng Yonghong
Copyright Year	2000
Description	Author affiliation: Lab. of Electr. Insulation for Power Equip., Xi'an Jiaotong Univ., China (Song Jiancheng)
Abstract	Since the introduction of partial discharge (PD) detection, the majority of conventional electrical measurement of PD has been performed with detectors operating in narrow bandwidths from 10 kHz to 1 MHz for several decades. In the past decade, advances in electronic instrumentation have permitted the measurement of PD with bandwidths up to 1 GHz. Since PD pulses are fundamentally events with duration as low as a few nanoseconds which have a very wide frequency spectrum, comparing with narrow band PD detection, PD measurement with such ultra-wideband (UWB) detection methods can provide more information on the deterioration of stator winding insulation subjected to combined stresses. A UWB PD measuring technique with bandwidths from 20 kHz to 1 GHz is presented, and some waveforms of UWB PD signals of stator bar specimens in different aging periods both in time domain and frequency domain are given in this paper. It has been found that the ultra high frequency components contained in PD pulse increase and the rise-time of the pulse decrease gradually with aging time. It would be suggested that the ultra high components of PD pulse may be used to characterize the aging degree of stator winding insulation.
Starting Page	181
Ending Page	184
File Size	425788
Page Count	4
File Format	PDF
ISBN	0780354591
DOI	10.1109/ICPADM.2000.875660
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2000-06-21
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Partial discharges Bandwidth Aging Partial discharge measurement Pulse measurements Event detection Frequency measurement Stator windings Insulation Electric variables measurement
Content Type	Text
Resource Type	Article

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