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

被引：20
|
作者：
Yuo, Bo [1 ]
Chen, Xiaolin [1 ]
Cheng, Yonghong [1 ]
Song, Jiancheng [1 ]
Xie, Hengkun [1 ]
机构：
[1] Xi An Jiao Tong Univ, State Key Lab Elect Insulat & Power Equipment, Xian 710049, Peoples R China
来源：
IEEE TRANSACTIONS ON ENERGY CONVERSION | 2006年 / 21卷 / 02期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
diagnosis; generator; partial discharge; stator bar insulation;
D O I：
10.1109/TEC.2006.874223
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
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.
引用
收藏
页码：387 / 395
页数：9
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