三相潮流计算在配电网自动化中的应用

针对配电网络的实际情况和具体特点 ,提出了一种适合于配电系统的三相潮流算法 ,该算法是基于辐射状配电网络结构的前推回代法的基本原理 ,根据配电系统树形网络的特点 ,采用图论中树的概念 ,对网络节点采用分层、同层从左到右的顺序优化编号 ,用前推回代法分别求解支路电流和节点电压 ,并应用戴维南等值原理 ,采用补偿法解环 ,从而有效地解决了前推回代法在少环网或弱环网系统中收敛困难的矛盾。该算法最突出的优点是 :运算速度极快 ,收敛性较强 ,可以用于配电自动化系统中的故障优化隔离、网络优化重构以及无功补偿点的快速确定等方面。

The application of three phase power flow calculation to distribution automation system

This paper introduces an approach to three phase distribution power flow for practical distribution system. This method is based on forward and backward method. This paper presents a new simple node and branch numbering scheme in term of the characteristic of radial distribution power system.The forward and backward method can not be directly applied to a weakly meshed distribution system,we use compensation method to break the loop in term of the Thevenin equivalent.This method has better robust and fast speed and can be used in real time operations of distribution automation system.