A Study of Reliability Assessment Node Number Optimization Algorithm for Radial Distribution System

In the article, the radial construction feature of mid-voltage distribution network has been carefully considered. And we optimize the node number method and adopt the storage structure of tree and use the traversal algorithm to evaluate the reliability of distribution network with object-oriented programming language. In the topological structure based tree model, according to the fault location, the tree is divided into two parts -the forward one and the backward one. We use traversal algorithm of tree to determine the fault influence area by only searching the father node in the forward part and judge the nodes' fault type in the backward one. The representation of the algorithm is simple and specially is suitable for programming. The searching efficiency is greatly improved. It can accurately express various topological structure of radial network, especially the system with many branch feeders, to provide a designing basis for the calculation of the loss of energy of system and network planning etc.