玉溪电站发电机转子绝缘低缺陷分析和处理

Analysis on Reduction of Insulating Resistance and Countermeasures for Magnetic Pole of Yuxi Hydropower Station

针对玉溪电站两台水轮发电机绝缘逐渐下降的现象,进行了一系列处理和分析.最终通过转子磁极解体检修,确认转子绝缘下降的根本原因为磁极端部封装工艺不合理、碳刷磨损,灯泡头内碳粉较多等,并对此进行了处理,效果良好.该机组转子绝缘降低处理的经验和改进措施,对类似工程有借鉴意义.

In Yuxi Power Station, the insulation of two hydro-generators reduced gradually, a series of processing and analy- sis are made. Finally through overhauling for the magnetic pole, the root cause of the rotor insulation felling is confirmed, and the practical problems are solved. The practical experience and improvement measures about the generator rotor insula- tion to reduce may provide reference for similar projects.