摘要
行波传输速度是影响行波测距精度的关键因素之一,输电线路上暂态行波速度的难以确定严重制约了行波测距精度。对此,文中从优化行波传输速度着手,提出一种多回输电线路行波故障精确测距方法。首先基于波速误差对输电线路行波测距精度的影响,分析了现存行波波速确定方法的优劣。进一步,基于同杆多回输电线路共用输电走廊的结构特点,在非故障线路上实时在线测量出行波速度,并将其应用于故障线路的精确行波测距计算中。理论分析和仿真数据均表明:此方法不受线路参数的影响,能有效克服环境因素给沿线波速带来的误差。使测距波速更加贴近于行波传输的实际速度。可在一定程度上提高行波测距精度。
The measurement accuracy of traveling wave velocity is one of the main influence factors for travelingwave fault location. Starting from optimizing the traveling wave transmission speed,an accurate location method formultiloop transmission line is proposed in this paper. First,analyze the effect of wave velocity error to location accu-racy,and summarize the advantages and disadvantages of the classical methods of determining the wave velocity.Then,according to the structural characteristics of multi-loop transmission lines,the common transmission corridoris adopted,measurement the normal line velocity,used for fault line precision distance calculation. Both theoreticalanalysis and simulation indicate that the proposed method will not be affected by line parameters and environmental factors,at the same time can improve the fault location accuracy to a certain extent.
作者
田斌
方覃绍阳
李振兴
李志伟
刘波
高鹏
TIAN Bin;FANG Qinshaoyang;LI Zhenxing;LI Zhiwei;LIU Bo;GAO Peng(State Grid Enshi Power Supply Company,Hubei Enshi 445000,China;College of Electrical Engineering and New Energy,China Three Gorges University,Hubei Yiehang 443002,China)
出处
《高压电器》
CAS
CSCD
北大核心
2019年第1期184-189,共6页
High Voltage Apparatus
基金
国家自然科学基金资助项目(51507091)
强电磁工程与新技术国家重点实验室(华中科技大学)开放基金资助项目(2016KF003)~~
关键词
故障定位
输电线路
同杆多回线路
行波测距
行波波速
fault location
transmission line
multiple circuit lines
traveling wave location method
traveling wave velocity
