Research on the calculation of thermal resistances of thermal-liquid coupled network model of huge hydro-generator’s stator

To identify the thermal-resistances of thermal-liquid coupled network model of huge hydro-generatorpsilas stator, this paper presents a LS(least-squares) method. The thermal-resistances identified by the LS method, calculated by the traditional thermal-circuit method and by FEM are substituted into the thermal-liquid coupled network model of the whole stator respectively, and 3 models are gotten. The comparing the calculation results of temperature distribution of the 3 models with the real running data shows that the LS method of parameter identification of thermal-resistance is a available way.