发电机匝间保护负序功率方向原理分析

介绍了分析负序功率方向继电器动作的原理,结合负序电流CT极性以及不同灵敏角度的选择,得到了继电器动作特性。结合CT极性选择,对比负序功率方向继电器作为启动元件或闭锁元件等不同前提条件下负序功率方向继电器最大灵敏角的整定,画出了三种故障下向量图,具体地呈现出最大灵敏角,给出了负序功率方向继电器最大灵敏角的整定原则。

Principle analysis of generator inter-turn protection negative sequence power direction

This paper introduces the principle of negative sequence power directional relay action,and works out the characteristics of relay action according to the CT polarity of negative sequence current and the selection of different sensitive angle. In the paper,it also compares the maximum sensitive angle setting of negative sequence power directional relay under different preconditions,such as making negative sequence power directional relay as start or closure component,draws the vector diagram of three faults,which shows the maximum sensitive angle,and works out the setting principle of the maximum sensitive angle of negative sequence power directional relay.