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Case Study of Overstep Tripping for Grounding Protection of Generator Stator
Author(s): 
Pages: 68-70
Year: Issue:  8
Journal: ELECTRICAL EQUIPMENT

Keyword:  中性点不接地系统零序电流保护单相接地;
Abstract: 分析了2006年9月26日海南南山电厂1号发电机定子接地保护越级动作的原因是保护装置零序电流最小整定值过大,不能满足在较小运行模式厂用电系统下的动作要求.提出了相应的改进办法,提高了电厂运行的可靠性.
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