一起定子接地故障及匝间故障引发的继电保护动作行为分析  

Analysing the action of protection about stator fault and fault between turns

作　　者：王大鹏[1] 王涛[1] 周宏斌 康勇 孙秀敏 陈珩[3] 

机构地区：[1]山东电力研究院,山东济南250002 [2]潍坊发电厂,山东潍坊261201 [3]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电力系统保护与控制》2008年第22期82-87,共6页Power System Protection and Control

摘　　要：介绍了一起现场发生的典型定子接地故障和匝间故障时继电保护装置的动作行为情况。通过对故障录波数据、继电保护装置的动作行为及现场测量数据的详细分析,提出了改进的建议。建议重视对发电机中性点接地变压器的测量,包括数值误差和角度误差,如果误差较大建议安装保护专用变压器。建议继电保护工作者重视定子接地保护的二次回路,同时对于定子接地保护的动作时限问题慎重考虑。建议对于2Y结构6个出线头的发电机,装设横差保护。In this paper, the reaction of the protection device to the stator earth fault and intertum fault is presented. By analyzing the fault recorder data, the acting behavior of the protection device and the on-site measured data, the unique advice is proposed, suggesting that special attention should be drawn to the measurement of the earth transformer at the neutral point of generators, especially to the measurement of its amplitude error and angular error. Attention also should be paid to the secondary circuit of the stator earth protection and the setting of its trip delay. In addition, the importance of a transverse differential protection in terms of a generator with double-star stator structure is explained.

关 键 词：定子接地 匝间故障 继电保护动作行为 电力系统 

分 类 号：TM774[电气工程—电力系统及自动化]