基于分布参数模型的双端故障测距算法研究

A Hybrid Algorithm of Double-Ended Fault Location Based on Distribution Parameters Model

针对高压传输线路故障测距难题,基于分布参数模型提出一种双曲正切函数相位特性故障测距和双端非同步故障测距的混合算法。算法先利用构建的双曲正切函数只有一个过零点的特性进行粗略定位,再利用线路两端到故障点电压相等的特性,选取故障前后两组等值非同步数据构建方程并对测距结果进行修正,得到准确的测距结果。仿真结果表明,该算法不受故障发生角、过渡电阻和故障类型等因素的影响,鲁棒性较好。

Aiming at the problem of fault location for high voltage long transmission lines,a fault location algorithm based on the phase characteristics of hyperbolic tangent function and double-ended asynchronous was proposed on the basis of distributed parameter model.Firstly,the algorithm locates fault roughly by the hyperbolic tangent function＇s characteristic of only a zero-crossing point.Secondly,with the characteristic that the voltages of the fault point are equal to both ends of the transmission line,two non-synchronous data whose values are equal to each other are chosen to construct the equation for correcting the location result before and after the fault,and then the accurate results will be get.Results of simulation indicate that,the algorithm had high accuracy and robustness of fault location,and it is immune from the incidence angle,transition impedance,fault type,etc.