Analysis of 220kV Transformer Tripping Accident Caused by Neutral Point Gap Breakdown

摘要：

　　Through the neutral point of the main transformer is breakdown gap under the lightning over-voltage,and the main transformer is tripped by the zero-sequence protection,the discharge dispersion of gap is large is indicated; When 220kV neutral point is ungrounded,the protection must be sharing after arrester parallel gap is proposed.The two-phase or three-phase wave is the main reason of the protection device action are pointed by discussing the wave process in the transformer; The most simple and effective way is placing special transparent insulating over the gap is proposed.

关键词： effective grounding over voltage protection gap arrester wave process

作者: Chen Gang Wang Qinghao Huang Yuxia Li Gang Wu Shaoyong Zhang Jiayan Li Yan

作者单位: Fushun Power Supply Company, Liaoning Electric Power Company Limited, China Ministry of Science and Technology, Liaoning Electric Power Company Limited, China

会议类型: 国际会议

会议名称: 2012 International Conference on Engineering Materials,Geotechnical Engineering and Environmental Engineering(EMGEEE2012)(2012工程材料、岩石工程和环境工程国际会议)

会议地点: 石家庄

会议语种:英文

页码: 387-390

在线出版日期: 2012-10-26（万方平台首次上网日期，不代表论文的发表时间）