Environment Simulation Test on Stator Coil for 1000MW Hydro-Generator

摘要

The purpose of this paper was to introduce a new way to assess the stator coil insulation property of 1000MW hydro-generator through environment simulation test, which included four factors, such as the humidity, oil filth, powder and thermal aging. The dust and grease contamination was coated on the surface of the stator coils, and then these coils were in store in the humid and thermal environment for 14 days. The stator coils could pass the property test after 14 days; these stator coils would be given access to next cycle of 14 days. There were three cycles in the environment simulation test. The property test included insulation resistance, dielectric losses, party discharge and withstand voltage test. The test results showed that 1000MW hydro-generator stator coils had favourable property after three cycles in the environment simulation test.