Double-fed three-phase induction machine model for simulation of inter-turn short circuit fault

The aim of this paper is to develop a doubly-fed induction machine (DFIM) model suitable for the simulation of this machine in the healthy mode and faulty mode. Indeed, the developed model allows the simulation of the inter-turn short circuit in the stator or the rotor of the machine in any system with control circuits and/or connections to the grid by means of power electronics converters. The circuit-oriented approach has been chosen in order to represent the DFIM model as a rotating transformer. Of course, since this model doesn´t need any transformation, it is possible to simulate any kind of asymmetry in both stator and rotor sides with or without variations of the machine parameters. In addition, the first turn of one phase of the stator and the rotor was modeled using the circuit-oriented approach to simulate an inter-turn short circuit in both stator and rotor. A specific wound-rotor induction machine model, using only resistances, inductances and controlled voltage sources, has been developed. The coupling effects between stator and rotor have been taken into account stator-rotor mutual inductances. The performances of the model have been verified by comparison between simulation and experimental results on a 5.5 kW-50 Hz-8 poles DFIM working in generating mode at different load conditions.