摘要
特高压输电线路具有显著的分布参数特性,因此线路发生故障时,测量阻抗与故障距离的关系不同于高压、超高压线路故障时的关系,并联电抗器的使用使得情况更加复杂。为了将距离保护应用到特高压线路上,提出了不同的解决方案。通过公式推导、阻抗平面绘图以及支接阻抗特性仿真等方法,对比分析了这些方案的静态特性,结果表明它们能够满足继电保护的静态精度要求。仿真分析验证了结果的正确性。
Because of the distinct characteristics of distributed parameters,the relationship between measured impedance and fault distance of ultra high voltage（UHV）transmission lines is much different from that of high voltage（HV）or extra high voltage（EHV）transmission lines.The usage of shunt reactors renders extra complexity.In order to use distance relays on UHV lines,different schemes are proposed.This paper analyzes static characteristics of these schemes by formula derivation,impedance plane diagram and sub-circuit resistance characteristics calculation,which reveals that all proposed schemes satisfy the static performance requirements of relays.Digital simulation validates the correctness of the analysis results.
出处
《电力系统自动化》
EI
CSCD
北大核心
2010年第2期75-79,共5页
Automation of Electric Power Systems
