基于小波变换的HVDC线路行波距离保护  

Distance Protection Scheme with Traveling Wave for HVDC Line Based on Wavelet Transform

作　　者：全玉生[1] 李学鹏[1] 马彦伟[1] 杨俊伟[1] 

机构地区：[1]华北电力大学电力工程系,北京市102206

出　　处：《电力系统自动化》2005年第18期52-56,共5页Automation of Electric Power Systems

摘　　要：对高压直流(HVDC)线路故障特性进行了具体分析,研究了行波在直流线路中传播的特殊性,详细介绍了行波测距式距离保护的原理及应用于直流线路的优势,并对直流线路行波保护提出了具体的要求。利用小波变换对行波保护的动作性能进行了深入分析,提出了具体保护判据。EMTDC仿真结果证明了分析结果的正确性和解决方法的可行性。This paper analyzes faulty characteristics of the HVDC lines in details, studies the particularity of traveling waves spreading on HVDC lines, introduces in details the theory of distance protection with traveling wave fault location and advantages of applying on the HVDC line, brings forward concrete requirements for traveling wave protection of HVDC. This paper also analyzes the action characteristics of traveling protection by wavelet transform and finally proposes protection criterions. Simulation results by PSCAD/EMTDC show that the analysis is correct and the solution is feasible.

关 键 词：HVDC线路 行波 距离保护 故障测距 小波变换 

分 类 号：TM773[电气工程—电力系统及自动化]