NDLI: Diagnosis of stator winding insulation of large generator based on partial discharge measurement

Content Provider	IEEE Xplore Digital Library
Author	Bo Yue Xiaolin Chen Yonghong Cheng Jiancheng Song Hengkun Xie
Copyright Year	1986
Abstract	The Stator winding insulation is aged by exposure to a combination of thermal, electrical, mechanical, and environmental stresses. Diagnosis of stator winding insulation is an important measure of ensuring the safe operation and extending the remaining life of large generator. In the paper, two new parameters are proposed for the diagnosis of stator winding insulation based on the test results of multistress accelerating aging test of stator bars. The test results show that the skewness of partial discharge phase resolved distribution and the high-frequency crest of partial discharge (PD) impulse change much more remarkably with the aging time than do the conventional parameters. Therefore, the two parameters could be considered as characteristic parameters for the diagnosis of stator winding insulation of the large generator. With these characteristic parameters, authors successfully assessed the insulation condition of actual stator bars removed from several large generators.
Sponsorship	IEEE Power Engineering Society
Starting Page	387
Ending Page	395
Page Count	9
File Size	959323
File Format	PDF
ISSN	08858969
Volume Number	21
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Stator windings Partial discharge measurement Partial discharges Thermal stresses Insulation testing Stator bars Character generation Dielectrics and electrical insulation Accelerated aging Life estimation stator bar insulation Diagnosis generator partial discharge
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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Partial discharge, dissipation factor, and corona aspects for high voltage electric generator stator bars and windings

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