文档介绍：第 39卷第 14期电力系统保护与控制
2011年7月 16日 PowerSy~em Protection and Control July16,2011
电缆一架空线混合输电线路故障测距方法研究
唐学用,黄民翔,尹晓光,姚伟锋
(,浙江杭州0027;,四川 31 成都 610031)
摘要:针对电网城市化而带来的电网继电保护问题,提出了一种电缆一架空线混合输电线路故障测距方法。根据线路参数计
算假设故障发生在两段线路连接处时,暂态行波传播到线路两端所用时间,求取时间差作为基准值;当故障发生时,用线路
两端测得的行波到达时刻做差,与基准值比较判断故障发生区段;利用单端行波故障测距法求取故障位置。该方法不受过渡
电阻、故障类型影响,通过仿真验证了方法的有效性。
关键词:行波;电力电缆;架空线;混合输电线路;故障区段;小波变换
Astudy on faultlocating methods based on hybird transmission lines consistingpowerof cables and
overheadlines
TANGXue—yong ·HUANGMin-xiang ,Y1NXiao-guang ,YAOWei—feng
( ofElectrical Engineering,Zhejiang (,HangzhouofElectrical 310027,China;
,Southwest ofElectrical JiaotongUniversity,Chengdu 610031,China)
Abstract:Alocation fault methodhybridfor transmission consisting powerof cable and overhead proposed is line according the to
problem ofrelay protection encountered in power ,under the assumption that the fault happens at thejunction oftwo thejunction at happens fault the that assumption the ,underpower in encountered protection ofrelay problem
lines,accordingparameter line the totravelingwewavetransient time thecalculatethat propagates ends,and line the to thentheobtain
timedifferencewhich considered is benchmark a OCCurS,we henfault a pare timedif