Modelling of induction motor for simulation of internal faults

Accurate and flexible computer model of an induction motor is a very important tool for diagnostic and fault protection algorithms investigation. This paper considers modelling of an internal faults in stator windings of an induction motor. General approach to inter-turn faults modelling in such machines is discussed and implementation of the model in ATP-EMTP program in a form of Type-94 element is presented. Included examples demonstrate basic characteristics of the proposed model and its application for internal fault analysis in the complex system included motor, load and a supplying network.