利用行波到达时差关系的配电网故障定位算法

发布时间：2018-06-19 18:38

本文选题：行波 + 配电网　；参考：《中国电机工程学报》2017年14期

【摘要】：针对现有配电网故障定位技术存在的缺陷,提出一种基于行波到达时差关系的配电网故障定位改进算法。故障前,针对配电网结构一般不变的特点,将全网线路进行等分,根据等分点至各线路末端的距离建立行波路径矩阵,进一步计算行波在各路径上的传播时间,在此基础上建立各节点的行波到达时间差矩阵。故障后,由小波变换准确获取故障初始行波到达各线路末端时刻,建立各分支线路间实际的行波到达时间差矩阵,然后比较故障前后行波到达时差矩阵的差异,通过矩阵差异值找出故障位置,实现故障定位。为了提高构建行波路径矩阵的效率,对线路结构进行归一化处理,并给出通用的行波路径长度计算方法。经大量仿真验证,所提算法可行有效,定位精度较高。
[Abstract]:An improved fault location algorithm based on traveling-wave time-of-arrival (TDOA) relationship is proposed for existing fault location techniques in distribution networks. Before the fault, according to the general invariant characteristics of the distribution network structure, the whole network line is divided equally, and the traveling wave path matrix is established according to the distance from the equal dividing point to the end of each line, and the traveling wave propagation time on each path is further calculated. On this basis, the time difference matrix of traveling wave arrival of each node is established. After the fault, the initial traveling wave arrival time of each line is accurately obtained by wavelet transform, and the actual traveling wave arrival time difference matrix between each branch line is established, and then the difference of traveling wave arrival time difference matrix before and after fault is compared. The fault location is found by matrix difference value, and fault location is realized. In order to improve the efficiency of constructing the traveling wave path matrix, the line structure is normalized and a general method for calculating the length of the traveling wave path is given. A large number of simulations show that the proposed algorithm is feasible and effective, and the positioning accuracy is high.
【作者单位】：东北大学信息科学与工程学院;
【分类号】：TM711

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