Analysis on aging condition of stator winding insulation of generator based on the moment characteristics of partial discharge

被引：0
|
作者：
Zhang, Xiao-Hong [1 ]
Zhang, Liang [1 ]
Yue, Bo [1 ]
Xie, Heng-Kun [1 ]
机构：
[1] Xi'an Jiaotong Univ., Xi'an 710049, China
来源：
Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering | 2002年 / 22卷 / 05期
关键词：
Aging of materials - Electric generators - Method of moments - Partial discharges - Stators;
D O I：
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中图分类号：
学科分类号：
摘要：
The aging mechanism of stator winding insulation of large generator is analyzed. In this paper, the dependence of skewness and kurtosis in the profile of Φ-q and Φ-n characteristic on aging time are investigated by means of PD measurement on model bars subjected different stresses. The skewness in the profile of Φ-q characteristic changes from positive to negative with aging time, which can be considered as a reference of aging course in stator winding insulation of large generator. A new phenomena is found that the maximum number of PD pulse in the profile of Φ-n appear to be at 45° and 135° in unaged specimen, at 0° and 180° in mid-aged specimen, at 90° and 270° in high-aged specimen, which is an important information to realize aging condition in stator winding insulation of large generator.
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页码：94 / 98
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