Insulation safety analysis based on the novel generator stator model

Traditional passive stator winding model can not represent electromotive force(EMF) when stator is in working condition.This paper proposes an active stator winding model,taking into account the EMF occurring when stator winding cuts magnetic induction lines.Every stator slot will produce EMF with different phase angles,dividing and putting the EMF unit into every sub-bar of the winding model.Field-circuit comprehensive analysis using active stator model can calculate the electric field distribution of stator slot,and predict safety of stator insulation.The over-voltage simulation results show that using active stator model to reckon electric field distribution is more accurate than using the traditional stator model,and has higher accuracy of predicting winding insulation fault.