基于故障录波信息的单端测距方法优劣分析

摘要

针对高压架空输电线路中的中短线路,对迭代法、解二次方程法、对称分量法以及解微分方程法四种单端故障测距算法原理进行了简单的阐述,并对比分析了各种算法的优缺点,同时解释了部分结果严重偏离准确值的原因,即：在电压等级高、输电线路长的情况下,传统的单端故障分析测距法精确性会下降,甚至出现错误结果.%Aimed at high voltage overhead transmission lines in the medium and short-term distance,this paper presents four one-terminal data fault location algorithms including the iterative method,solution quadratic equation,symmetrical component method and solution differential equations.Grounded upon the results,it conducts a comparative analysis of the advantages and disadvantages of different algorithms,and explains some reasons why the findings seriously deviated from the accurate value.Finally,it comes to the conclusion that in the circumstances of high-voltage grading and long transmission lines,the accuracy of the traditional one-terminal fault location analysis declines,or even leads to the wrong results.