Synchronous Generator Loses Field Evolutionary Process Analysis and Correlation Part Temperature Field Computation

Rotor losing field is one significant accident for turbo generator. Combining the FEM with the electrical circuit equation, a mathematical model of the turbo generator with losing field is established in this paper, witch takes into account the pole geometry, slot effects, saturation and eddy current. The transient behavior and electrical parameters when turbo generator loses field with open exciting winding and direct short exciting winding are calculated. At the same time, the mathematical model of stator radial ventilating groove is established, and the fluent distribution in the stator radial ventilating groove is computed. On the foundation, the radiating coefficient of each stator surface is calculated, and then the mathematical model of stator 3D temperature field is established, the stator temperature field when turbo generator loses field is calculated.