电瓷避雷器Issue(3)：1-9,9.DOI:10.16188/j.isa.1003-8337.2026.03.001
基于自振回路的柔性直流线路故障测距方法
Fault Ranging Method for Flexible DC Lines Based on Self-Oscillating Circuits
摘要
Abstract
Flexible DC transmission lines are subject to a range of faults,including ground faults,from time to time.To ensure the reliable operation of the voltage source converter HVDC(VSC-HVDC)sys-tem,it is necessary to study its fault ranging technology.A new method of fault ranging for flexible DC transmission lines with additional self-oscillation loops is proposed.The scheme starts from the fact that reactive power is related to line inductance-capacitance,and a self-oscillating loop is attached to the large DC capacitor that can be re-integrated into the system after a trip,and use the reactive power and current provided by the circuit and the self-oscillation frequency as a criterion.The inductance wave-form is obtained by measuring the resulting line reactive power and current,and the inductance value is obtained by averaging to perform fault ranging.Finally,a simulation model is built using PSCAD/EMT-DC software,which verifies that the proposed scheme is not affected by the transition resistance and is ef-fective for fault location.The proposed scheme can meet the fault ranging requirements of flexible DC transmission lines by using only single-ended quantities for ranging.关键词
接地故障/VSC-HVDC/自振回路/故障定位/自振频率/直流输电线路Key words
ground faults/VSC-HVDC/self-oscillation circuit/fault location/self-oscillation fre-quency/DC transmission line引用本文复制引用
文建,解超,尹纯亚,张高航,杨宗蕾..基于自振回路的柔性直流线路故障测距方法[J].电瓷避雷器,2026,(3):1-9,9.基金项目
国家重点研发计划(编号:2021YFB1507001).Project supported by National Key R & D Program(No.2021YFB1507001). （编号:2021YFB1507001）
