基于集成经验模态分解的高压直流输电线路行波故障测距  

Fault-location method for HVDC transmission lines based on EEMD

作　　者：杨立红[1] 杨明玉[1] 彭志峰[1] 杨雨昂[1] 

机构地区：[1]华北电力大学电力系统保护与动态安全监控教育部重点实验室,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2013年第6期33-39,共7页Journal of North China Electric Power University：Natural Science Edition

摘　　要：直流输电线路两端的边界元件会造成行波波头畸变,且过渡电阻和线路色散等因素会进一步增加对波头到达母线时刻进行准确标定的难度。基于行波原理,采用集成经验模态分解(EEMD)算法分解出行波高频分量从而获取测距所需的时间参数,提出一种高压直流输电线路新型故障测距算法。该算法无需识别行波波头和计算行波波速,不受输电线路弧垂的影响,具有较高的测距精度和可靠性。通过PSCAD和MATLAB联合仿真,结果表明,该测距算法准确可靠,具有较强的鲁棒性。The characteristics of traveling wave will be changed while hitting the DC system boundary and the transition resistance and dispersion will makes it harder to determine the traveling wave time parameters for location. Thereby en semble empirical mode decomposition is employed to extract the highfrequency component from traveling wave and de termine the traveling wave time parameters. And then a novel faultlocation method for HVDC transmission lines based on traveling waves is presented, which doesn＇t need to identify the traveling wave, and avoids the influence of traveling wave speed and transmission line arc in theory. Both of the location reliability and accuracy are improved. The results of simulations by PSCAD and MATLAB indicate that the faultlocation method is correct, reliable and quite robust.

关 键 词：故障测距 行波 波速 集成经验模态分解 高压直流 

分 类 号：TM77[电气工程—电力系统及自动化]