终端线路变压器组继电保护配置及变压器中性点接地方式研究

分析研究了终端线路变压器组继电保护配置及变压器中性点接地方式的发展历史和存在的问题，针对目前国内经常出现的终端线路发生单相故障单相跳闸非全相运行期间。终端变电站主变中性点间隙保护动作，造成终端变电站全停的问题，提出了在没有更好地防止过电压措施的情况下，终端变电站主变中性点应采取直接接地运行的方式。吉林省电网采取该措施后，已经成功避免过终端变电站全停事故的发生，取得了良好的效果。

Research on Relay Protection Configuration of Terminal Line Transformer Group and Transformer Neutral Point Grounding Schemes

This paper analysis the developing history and existing problems of terminal line transformer group relay protection configuration and transformer neutral point grounding schemes.In our country,when single phase fault caused single phase trip in terminal line during non whole phase operation,terminal transform station neural gap protection start-up,which cause terminal substation outage.Terminal substation neural point direct grounding operation method was proposed in case of no better over-voltage protecti...