摘要
介绍变压器中性点过电压一次保护和二次保护的措施,以及变压器中性点过电压计算方法,分析变压器中性点间隙异常击穿的典型实例,针对变压器中性点间隙异常击穿导致二次保护动作造成变压器跳闸的问题,提出延长变压器中性点间隙过电压二次保护动作时限的解决方案,对方案的可行性进行分析。
This paper summarizes the protection scheme on gap protection and relay protection to transformer neutral point and calculating method of the transformer power frequency over-voltage.combined with typical events that main transformer CB trip off because of the gap relay protection in the earth faults without over-voltage,brings out a protection practical insulation extending the action time limit of the gap relay protection,and analyzes feasibility in detail.
出处
《河北电力技术》
2012年第1期1-3,共3页
Hebei Electric Power
关键词
变压器
中性点间隙
过电压保护
一次保护
二次保护
transformer
transformer neutral point
over current protection
gap protection
relay protection
