基于改进双端行波法的配电网故障定位方法研究

Research on Fault Location Method for Distribution Network Based on Improved Double-Ended Traveling Wave Method

配电网复杂程度逐渐提高,传统定位方法精度不能达到所需标准。为了提高故障定位的精准度,提出一种改进的行波双端测距法,该方法利用高频传感器对行波的波头进行采样有效提高测距精度;同时提出修正波的概念,在传统的双端行波算法的基础上进一步改进,减小了测距误差。基于MATLAB仿真软件搭建双端输电线路模型,仿真结果表明该方法不受故障类型、距离等因素的影响,精度得到提高。

With the increasing complexity of distribution network,the accuracy of traditional positioning methods cannot reach the required standard.In order to improve the accuracy of fault location,an improved traveling wave double-ended ranging method is proposed.This method uses a high-frequency sensor to sample the wavehead of the traveling wave,which effectively improves the ranging accuracy.At the same time,the concept of modified wave is proposed,which is further improved on the basis of the traditional double-ended traveling wave algorithm to reduce the ranging error.Based on MATLAB simulation software,a two-ended transmission line model is constructed.The simulation results show that the method is not affected by the fault type,distance and other factors,and the accuracy is improved.