摘要
针对超高压长线电容电流对差动保护的影响 ,使用 EMTP分析、比较了普通相量差动保护和故障分量相量差动保护的动作特性。仿真结果表明 ,对于两端供电超高压长线 ,带电容补偿的故障分量相量差动保护具有明显地高灵敏度和选择性 ;仿真结果还显示 ,在单侧电源和空投于故障线路情况下 。
Considering the influence of capacitive current on long UHV transmission line. the performances of traditionalcurrent phasor differential protection and fault component differential protection are extensively tested by using EMTP on atransmission line with various configurations and operating conditions. The result of simulation indicates that fault componentdifferential protection with capacitive current compensation has high sensitivity and good selectivity on a long UHVtransmission line with power sources at both ends. However, on a long UHV transmission line with power source at one end,or in the case of switching onto faulted line, all the schemes of traditional phasor differential protection can't meet therequirements of protective relaying of real power system.
出处
《电力系统自动化》
EI
CSCD
北大核心
2000年第20期37-40,共4页
Automation of Electric Power Systems
基金
高等学校博士学科专项科研基金
关键词
电力系统
超高压远距离输电线路
差动保护
power systems
protective relaying
long UHV transmission line
differential protection
current phasor
