Field-circuit analysis of winding insulation condition of generators stricken by overvoltage

The transient field-circuit model of large generators has been studied, and the field-circuit analysis for the transient over-voltage of large power stations is presented. For the large generator stricken by the over-voltage from power stations, the transient field distribution in the stator winding insulator can be analyzed on line, and some insulation fault point and domain in generators can be predicted and even detected successfully. Moreover, the simulation shows that the method is feasible and valid for the generator monitoring system of large power stations