继电保护中分支系数的计算技巧分析

分支系数概念的引入是为了方便继电保护整定计算时上下级欲配合的两个保护之间有分支电路的情况．在复杂电力系统继电保护整定计算时它的求取比较困难，原因是中性和大地是组成故障分析电路的一部分，而电力系统单线图反映这种关系，不十分清晰，另外根据电力系统分析理论，可将电力设备的性质用电路图等效．就其难点进行分析后总结出分支系数的计算办法和步骤，为顺利进行继电保护整定计算提供帮助．

An Analysis for Calculating Skill of Branched Coefficients in Power System Protective Relaying

The concept of branched coefficients is useful for relay setting. But it is harder to obtain it in the complex power grid contained some branched circuits because neutral and ground is an important part in the fault circuit analysis. However, the single - line diagram of power grid can＇ t reflect this obviously. Morever, according to the theory of power grid analysis, the characteristics of the power equipment can be equivalent by circuit diagram. A calculating skill achieving the branched coefficients is analyzed in this article, and points out the difficulties for gaining the branched coefficients in relay setting course. It is good for achieving the branched coefficients quickly in relay setting.