Modeling and simulation of stator turn faults. Detection based on stator circular current and neutral voltage

Most existing electrical faults in induction machines are stator turn faults; therefore the modeling of this defect appears very interesting. A number of authors have treated the modeling of this defect by completely changing the model from healthy to a defective one. This paper deals with the modeling of induction machines considering both healthy and faulty stator cases. The aim of this work is to make the electrical matrix parameters as a function of stator winding distribution. The consequence of both, fault degree and fault location are also considered. Stator faults detection are based on frequency analysis of the zero sequence for delta connected winding and on neutral voltage for wye connected winding. The simulation results show that the significant increase or decrease of certain harmonics can be used to detect short circuited turns in the machine stator.