考虑非平衡特性的辐射状配电网故障定位方法

配电线路通常采用非换相运行方式,存在三相不平衡负荷,造成线路参数不平衡,给故障定位带来困难。该文针对辐射状配电网提出一种新的故障定位方法,仅利用单端故障信息便可实现配电线路的准确故障定位。该算法利用网路矩阵研究配电网结构,降低故障计算的复杂程度;利用斐波那契(Fibonacci)数列搜索方法进行故障搜索,加快搜索过程。最后,利用PSCAD/EMTDC对配电网进行仿真分析,结果表明该文方法具有较高的故障定位精准度。

A novel fault location algorithm for radial distribution networks considering the unbalanced characteristics

The non-commutation operation mode is commonly utilized in distribution network,but there exist three-phase unbalanced loads resulting in line parameter imbalance.This situation brings some difficulties into the fault location.In this paper,a new fault location algorithm is proposed for radial distribution networks.Just single-ended fault information is considered to realize the accurate fault location.Firstly,a network matrix is employed to study the distribution network structure and the calculation complexity is reduced.Then,the Fibonacci(Fibonacci)sequence search method is adopted to speed up the fault point searching process.Finally,PSCAD/EMTDC is utilized to model a typical distribution network under different fault types.It is shown that the presented algorithm is able to identify fault locations with high accuracy.