电力系统继电保护整定计算中运行方式的组合问题

在进行整定计算前 ,必须确定整定计算所需的预备量 ,如保护所在线路末端短路流过保护的最大零序电流、保护所在线路与相邻线路配合的最大 最小分支系数等。为了计算这些预备量 ,必须选择一定的运行方式 ,在各种方式下进行故障计算 ,从中选取最大值或最小值进行整定计算。本文总结了传统的运行方式的选择方法的优缺点 ,提出了改进的运行方式的选择方法 ,并将其运用于继电保护整定计算软件的开发工作中。

The research on problem of operation mode combination in relay coordination for electrical system

Before coordination,preparing characters must be determined,such as maximal zero sequence current passing the relay when a fault occurs at the end of the line on which the relay is fixed,maximum and minimum branch coefficient of interaction between the lines which is nearby.For determining these characters,a kind of operation mode has to be chosen,with which the fault current calculation can be done.Then maximum or minimum can be picked out to do the coordination.In this paper,the virtue and shortcoming of traditional measures in choosing operation mode is concluded.And a new actable method in choosing operation mode is proposed,which can be used in the relay coordination software development.