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1 事故现象1999年11月29日,芦下坝水电站(2×8750kW)厂房6kV 高压室突然响起爆炸声,紧接着一阵短路电弧爆裂声,6kV 高压室冒出浓烟,厂用电消失,中控室控制台各开关的位置指示灯无指示,运行中的一号发电机定子电流表瞬间顶表,无功进相,随后电流及有功、无功表变为零,通过一号主变与大网联络的110kV 线路电流、功率表顶表,所有设备的继电保护没有动作,未出现光字牌和报警信号。手动断开一号发电机灭磁开关后,再断开110kV 联网开关并停机。灭火后发现6kV 高压室六面高压柜已完
1 Accident On November 29, 1999, the pressure of 6kV high voltage room of Luxiaba Hydropower Station (2 × 8750kW) suddenly sounded explosion sound, followed by burst burst of short circuit arc, thick smoke in 6kV high voltage room, loss of power consumption in the plant Control room control panel of the switch position indicator light without instructions, running on the 1st stator ammeter instant top table, reactive phase, then the current and active, reactive power meter becomes zero, through the main transformer and the network Contact 110kV line current, power meter top table, all equipment relay protection did not move, there is no light plate and alarm signal. Manually disconnect the first generator demagnetization switch, and then disconnect the 110kV networking switch and shutdown. After the fire found 6kV high voltage six-phase high voltage cabinet is over