| Abstract |
Power converters represent one of the highest failure rates in the wind turbine. Therefore convertermanufacturers perform burn-in tests to prevent shipping of faulty converters. Recent developments injunction temperature estimation, based on accurate online IGBT collector-emitter voltage measurements,allow for thermal stress estimation of the IGBT modules. This is utilized to detect infant mortalities inpower converters, by comparing thermal responses of IGBTs for faulty and non-faulty converters. Themethod proves to be a time and cost efficient candidate to replace burn-in tests of power converters forwind turbines applications. |
