A New Method for Stator Ground Fault Protection with Voltage Injection on Large Hydro Generators Grounded by Arc Suppression Coils

For stator ground fault protection of large hydro-generators grounded with arc suppression coil at neutral point, the conventional method is to inject 20 Hz signal from the instrument coil attached to the arc suppression coil. In order to improve the effect of the protection and to overcome the diff...

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Bibliographic Details

Published in:	Zhongguo dianli
Main Authors:	Lang ZHOU, Jianzheng LIU, Qixue ZHANG, Bo ZHONG, Lin GUI
Format:	Article
Language:	Chinese
Published:	State Grid Energy Research Institute 2021-12-01
Subjects:	large generator stator ground fault protection voltage injection arc suppression coil transition resistance
Online Access:	https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.202010102