纵向零序电压型发电机匝间保护几个问题  

Problems in Voltage-Type Longitudinal Zero-Sequence Inter-Turn Protection for Generator

作　　者：李玉海[1] 李久红[1] 张小庆[1] 徐敏[1] 

机构地区：[1]西北电力试验研究院,陕西西安710054

出　　处：《电力自动化设备》2001年第10期62-66,共5页Electric Power Automation Equipment

摘　　要：为提高纵向零序电压型发电机匝间保护动作的可靠性 ,在保护构成上 ,除专用TV断线闭锁装置外 ,还应增加负序功率方向继电器。另外 ,对零序电压元件增加 10 0～ 2 0 0ms的小延时 ,可提高匝间保护动作的可靠性。对匝间保护的整定值 ,即零序电压元件的动作电压及负序功率方向元件的动作方向 ,应根据发电机定子铁芯结构及定子绕组的连接方式确定。运行实践表明 ,作上述改进后的匝间保护 。In order to improve the reliability of voltage type longitudinal zero sequence inter turn protection performance for generator, there should be a negative sequence power directional relay protection as well as a special interlock device for TV circuit break off. In addition, an increment of 100～200 ms time delay to zero sequence voltage component can also improve its reliability. The protection setting values,such as the actuating voltage of zero sequence voltage component and the actuating direction of negative sequence power directional component are determined in accordance with the structure of generator stator core and the connection mode of stator windings.The practical operation shows that, improved by above measures the protection performance is more reliable.

关 键 词：汽轮发电机 匝间保护 纵向零序电压 整定值 

分 类 号：TM311[电气工程—电机]