配电网故障定位的一种改进通用矩阵算法

摘要

An improved general matrix algorithm is presented to locate faults in complex distribution networks with multiple source and multiple faults. Firstly, the paper supposes the only power source and the positive direction according to the system's structural characteristics, and establishes the description matrix D which is based on the positive direction and the relevancy between different feeders. Secondly, we install three working modes in the feeder terminal units (FTU), including positive over-current, reverse over-flow and normal model, transform the diagonal elements of the matrix D based on the direction sent from the feeder terminal units(FTU) to set up the fault judgment matrix P. Finally, we locate the fault section using the criterion. This method needs not matrix multiply or standardization. It's easy to build the description matrix D, which is very sparse and has small amount of calculation and speedy judgment.%提出了一种改进通用矩阵算法,该法适用于多电源多故障复杂配网的故障定位.根据配电网的结构特点假定唯一电源和正方向,将各节点的正向连接关系形成网络描述矩阵D,在馈线终端单元( FTU)装置中装设正向过流、反向过流和正常三种工作模式,根据FTU监测到的不同工作模式改写描述矩阵的对角元素形成故障判断矩阵P,运用故障判据快速判断出故障所在区域.该法不需矩阵相乘及规格化处理等繁琐运算,网络描述矩阵形成简单,稀疏性强,计算量小,判断速度快.