发电机出口离相封闭母线交流耐压试验异常分析

Analysis of Abnormal of AC Voltage Withstand Test of Isolated Phase Bus at Generator Outlet

对一例大型水力发电厂发电机出口离相式封闭母线进行交流耐压过程中的异常进行分析和阐述,经确认事件是母线式TA等电位线连接螺栓断裂造成的。针对发电机封闭母线母线式TA提出了制造工艺、安装和运行管理过程中的防范措施。

The abnormity in the process of AC withstand voltage of a large-scale hydropower station′s generator outlet isolated phase enclosed bus was introduced and analyzed.It was confirmed that the incident was caused by a break of the busbar TA equipotential bonding bolt.Aiming at the enclosed busbar bus-type TA of the generator,the preventive measures in the manufacturing process,installation and operation management were proposed.