摘要
本文主要针对复杂环网给输电线路后备保护整定计算带来的困难,运用拓扑分析解决输电线路后备保护的最优配合问题。从图的基本概念出发,根据输电线路后备保护的配合要求,求出描述环网中回路与保护关联的双向回路矩阵,应用回路权与保护权的概念,求取最优断口,最后得到相关顺序矢量和“主/后备”保护对,可对后备保护进行最优整定配合。编程计算的结果,说明这套计算方法是可取的。
A solution of the optimal coordination of back-up relays of transmission lines in an inherent multiloop network is found out by use of Topological Analysis Algorithm. Based on the basic concepts of Linear Graph Theory and the coordination issues of backup relays in transmission lines, the directed loop matrix LD which describes the incidence of loops and relays in an inherent multi-loop network is derived; by use of the concepts of Loop Weight and Relay Weight, the optimal Break Points are selected; finally, the Relative Sequence Vector(RSV) and Primary/Backup relay pairs (P/B) are obtained and the optimal coordination of backup relays is achieved. The results of programmed computation show that the methods presented in this paper are applicable.
