随着水电机组单机容量越来越大,水电站电气设备的安全稳定运行显的越来越重要。本文就对电气设备影响较大的局部放电进行了探讨,总结国内外研究局部放电最新进展,结合具体工程实际状况,认为局部放电的检测和评价是大型水电站电气设备绝缘状态分析判断的有效手段。 With the stand-alone capacity of hydropower generating units getting bigger and bigger, the safety and stability of hydropower station electrical equipment is obviously more and more important. In this paper, the partial discharges that affect the electrical equipment are discussed. The latest progress of partial discharge studies in domestic and abroad are summarized. Combined with the actual engineering conditions, it is considered that the detection and evaluation of partial discharges are effective methods for the analysis of the insulation status of electrical equipment in large hydropower stations.