摘要
针对负荷电流对差动保护的影响,对故障分量电流的性质进行了分析,并对基于故障分量向量的电流差动保护动作判据进行了理论分析及EMTP仿真验证,比较得出:故障分量差动判据与传统差动判据相比,在重载线路上发生各种故障,尤其是高阻接地时,能够大大提高差动保护的灵敏度。
According to the influence of load on differential protection,the property of fault compo - nent current and the operation criteria for the differential protection based on fault component vector are analyzed and verified with EMTP simulation.The conclusion can be drawn that the ope - ration criteria based on fault component enhance greatly the sensibility of the protection,especially for heavy load lines with high grounding reisistance.
出处
《电力自动化设备》
EI
CSCD
北大核心
2004年第2期60-63,共4页
Electric Power Automation Equipment
关键词
电流差动保护
动作判据
故障分量
differential current protection
operation criteria
fault component
