摘要
介绍变电站工频接地干扰的产生条件,针对邯郸地区2条220kV电力线路复用差动保护异常情况,分析接地短路电流通过接地网形成的工频接地干扰对复用差动保护的影响,提出采用等电位技术和隔离技术抑制工频接地干扰的措施。
This paper introduces concept of grounding power frequency interference,analyzes the effect of power frequency interference by grounding on multiplex differential protection caused by grounding short-circuit current of combining two abnormities of multiplex protection of 220 kV electric power line in Handan,puts forward the measures for restraining the grounding disturbance on power frequency by using the equipotential and isolation technology.
出处
《河北电力技术》
2011年第2期5-7,38,共4页
Hebei Electric Power
关键词
变电站
接地网
工频接地干扰
复用差动保护
等电位
substation
ground grid
grounding power frequency interference
multiplex differential protection
equipotential
