田湾核电站发电机采用的是TBB-1000型俄供发电机,机组容量较大。由于发电机转子端部容易集聚污物,造成转子绝缘性能下降,因此需要拆卸转子护环进行检修。但是田湾核电站拆卸护环的耗时较长,仅电源准备工作时间就耗时560分钟。文章利用PDCA循环将电源准备工作时间缩短到211分钟,取得了较好的经济效益和无形效益。 Tianwan nuclear power plant generator is used in TBB-1000 Russian for the generator, the unit capacity larger. Rotor guard ring needs to be disassembled due to easy accumulation of dirt at the rotor end of the generator, resulting in deterioration of the insulation of the rotor. However, Tianwan Nuclear Power Station dismantling the retaining ring longer time, only the power preparation time of 560 minutes. The article uses the PDCA cycle to shorten the preparation time of power supply to 211 minutes, and has achieved good economic benefits and invisible benefits.