针对三峡左岸机组在运行过程中发现的定子绕组绝缘电阻测量不准确,分散性大的问题进行了研究,分析了影响测量定子绝缘的各种因素,给出了多台机组定子绝缘和直流泄漏的试验数据,并在10F进行汇水环管的技术改造,通过试验分析了影响定子绝缘测量精度的因素。 In view of the inaccurate measurement and large dispersion of stator winding insulation resistance found during the operation of the left bank of the Three Gorges Project, various factors that affect the measurement of stator insulation are analyzed. The stator insulation and DC leakage of multiple units are given Test data, and technical transformation of the catchment loop at 10F. The factors affecting the stator insulation measurement accuracy are analyzed through experiments.