关于纵向零序电压型发电机匝间保护的几个问题  

On Longitudinal Zero Sequence Voltage type Turn - to -turn Breakdown Protection on Generator

作　　者：李玉海[1] 张小庆[1] 徐敏[1] 

机构地区：[1]西北电力试验研究院,西安710054

出　　处：《西北电力技术》2000年第4期21-26,共6页Northwest China Electric Power

摘　　要：文章指出为了提高纵向零序电压型发电机区间保护的动作可靠性，应具有负序功率方向闭锁元件；纵向零序电压元件的整定值，应根据发电机的定子结构决定；对纵向零序电压元件增加１００～２００ｍｓ的延时，可以提高匝间保护的动作可靠性。Negative-sequence lock element along power flow shall be available for enhancing action reliability of longitudinal zero sequence voltage type turn -to-turn breakdown protection on generator. The setting value of longitudinal zero sequence voltage element shall be determined by the stator structure of generator. An increase of 100-200ms delay for longitudinal zero sequence voltage element can improve action reliability of turn-to-turn breakdown protec- tion.

关 键 词：匝间保护 汽轮发电机 纵向零序电压 电压互感器 

分 类 号：TM311.073[电气工程—电机]