一起发电机定子接地保护跳机原因分析及对策

Analysis on reason of tripping accident of generator stator grounding protection

介绍了某电厂600MW燃煤汽轮发电机组及其发电机变压器组保护的投运情况,通过检查试验确定了主变压器低压侧橡胶套管积水是引发发电机定子接地保护跳机的原因,提出了具体的整改、预防措施。

The operation situation of the 600 MW coal-fired turbo-generator set and its generator-transformer set protection in a power plant was introduced. Based on inspection and test,it was found that there was stagnant water in the rubber sleeve in lowvoltage side of the main transformer,and which caused the generator stator grounding protection tripping accident. The concrete reformation and preventive measures were proposed.