站用变次级保护误动跳闸分析及对策研究

Analysis and Countermeasure Research on Malfunction Trip of Station Transformer Secondary Protection

阐述了假设多台电动机(包括多台主变冷却器启动,开关电动机打压,消防泵)同时启动会否引发站用变跳闸导致其中一台站用电失电的事故,现结合某500kV变电站的运行方式、设备资料和计算分析多台电动机在同时启动会否造成站用变跳闸的安全隐患,并讨论了消除安全隐患的措施。

It states the assumption whether it will cause station transformer trip leading to power loss of a station transformer if multiple motors(including multiple main transformer coolers, switching motor pressure, fire pump) start at the same time. Now combined with the operation mode, equipment data and calculation of a 500 kV substation, this paper analyzes whether the multiple motors starting at the same time will cause the safety hazard of the station to trip, and discuss the measures to eliminate the safety hazards.