白山抽水蓄能电站6号机组B级检修后进行甩100%负荷试验时,发生水车室管路破裂、转轮和导叶等过流部件设备损坏的事故。主要原因是导叶摩擦装置在机组导叶剪断销剪断后发生滑动,限位块保护功能失效导致导叶与转轮相撞击。对本次甩负荷试验事故起因及经过进行分析,可以让我们深刻了解导叶保护装置对电站安全运行的影响,校验机组导叶接力器的操作容量与导叶保护装置,能在任何工况下安全可靠的操作导水机构,在今后的相关机构设计、工艺操作及电站运维中,引以为鉴,避免此类事故的发生。 Baishan Pumped Storage Power Station Unit B after the overhaul 100% load test, the occurrence of water tank chamber rupture, runner and guide vane and other overcurrent parts equipment damage accident. The main reason is that the guide vane friction device slips after the cutting pin of the guide vane of the unit is cut off, and the protection function of the limit stop block causes the guide vane to collide with the runner. The load shedding test accident causes and after the analysis, we can make a profound understanding of the guide vane protection device on the safe operation of the plant, check the unit guide vane relay operating capacity and guide vane protection device, in any operating conditions Under the safe and reliable operation of the water guide mechanism, in the future related to the design, process operation and power plant operation and maintenance, learn from and avoid such accidents.