Research on temperature-rise of stator iron-core end region of turbine generator

The heating process of stator end-region of synchronous generator on all kinds of operating conditions is analyzed. With the phasor diagram of the electric-magnetic potential in cylindrical rotor synchronous generators, the mathematical model of temperature of stator end region in synchronous generator is deduced. The relationship between the temperature of stator end region and the active power, reactive power and armature voltage is developed. The parameters of the temperature model are identified with the method of least squares. A new temperature-rise limit curve of stator end region is deduced, which is given in the P-Q operating chart of synchronous generator. The preciseness of the temperature model is validated with the experimental values of turbine generator. The model is also used to real-time monitor of the generator stator end region temperature.