基于线性微分方程参数识别的单端准确故障测距算法  

Accurate fault location algorithm based on parameter identification of linear differential equation with single end data

作　　者：索南加乐[1] 王增超[1] 康小宁[1] 代玲[1] 仝小虎[1] 

机构地区：[1]西安交通大学电气工程学院,陕西西安710049

出　　处：《电力自动化设备》2011年第12期9-14,20,共7页Electric Power Automation Equipment

基　　金：国家自然科学基金重点项目(51037005);国家自然科学基金资助项目(50877061)~~

摘　　要：以输电线路RL模型为基础,利用故障状态网络和故障分量网络微分方程,推导出了一种时域线性微分方程的单端准确故障测距算法。该方法将故障点后系统简化为一个电阻和一个电感,并将其与故障距离和过渡电阻统一作为待识别参数,通过求解线性方程的系数,求出4个未知参数,消除了单端故障测距的原理性误差,不需要迭代和初值,求解结果唯一。EMTP仿真表明,该方法求解简单,不受系统运行方式和电网频率变化的影响,适用于任何故障类型。Based on the RL model of transmission lines,the fault state network and fault components network are applied to deduce an accurate fault location algorithm of linear differential equation in time domain with single end data,which simplifies the faulty system as a resistor and an inductor,and takes them,together with the fault distance and transition resistance,as the variables. These four variables are identified by solving the coefficients of the linear differential equation fault location equation,which eliminates the theoretical error of single end fault location,avoids iteration and initial value ,and possesses the uniqueness of the solution. Simulative results show that,it is simple,immune to system operating modes and power frequency fluctuations ,and suitable for different fault types.

关 键 词：故障测距 参数识别 微分方程 故障分量网络 RL模型 算法 

分 类 号：TM773[电气工程—电力系统及自动化]