基于PMU的 500kV 线路故障定位方法

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关键词：PMU； 500kV 输电线路；故障定位；同步相量测量；行波算法；阻抗算法中图分类号：TM75 文献标志码：A 文章编号：1003-5168（2025）16-0009-04DOI：10.19968/j.cnki.hnkj.1003-5168.2025.16.002

PMU-basedFaultLocationMethodfor 500kV TransmissionLines

HONG Lei （State Grid Fujian Electric Power Co.，Ltd.，Uhv Branch，Fuzhou 35OoO1， China）

Abstract： [Purposes] To address the technical challenges of traditional 500kV line fault location methods，such as insuficient accuracy and high sensitivity to transition resistance，and to improve fault location accuracy and response speed. [Methods] PMU synchronous phasor measurement technology was adopted to obtain high-precision phasor data from both ends of the line through GPS clock synchronization. A fusion location algorithm combining traveling wave propagation theory and impedance calculation was designed，and the algorithm performance was verified through PSCAD/EMTDC simulation. [Findings] The simulation results show that the fusion algorithm controls errors within 0.68% ，with a response time of 11 ms，achieving a 35% accuracy improvement over traditional methods while demonstrating robust performance across various fault types.[Conclusions] This method effectively mitigates issues such as transition resistance effects and line parameter inaccuracies，achievesmillisecond-level fault location， and provides technical support for rapid grid fault recovery and smart grid development.

Keywords： PMU; 500kV transmission line; fault location; synchronous phasor measurement; traveling wavealgorithm;impedancealgorithm

0 引言

500kV 超高压输电线路在电力系统中承担着远距离传输电能的重要任务，其安全稳定运行直接影响电网供电可靠性。（剩余3356字）