The estimate of insulation life of wind turbine generator based on the heat damage accumulate rule

A stator temperature field of high-power permanent magnet wind turbine generator was calculated and gotten by 3-D finite element method.The temperature test was carried out to verify the calculation method.The results showed that the temperature of end-winding is higher than that of midwinding and the maximum temperature point is at the end-winding of leeward side,which is 16 ℃ higher than average temperature.The Miner's rule was introduced to establish an insulation life estimate method which based on the heat damage accumulate rule.An insulation life of wind turbine generator was predicted,the result showed that the insulation life limit was rich.