Modeling Interturn Fault for Multiphase Induction Generator in Wind Turbine Application

Abstract

Most of the short circuit faults begin with an interturn fault caused by an insulation failure between winding turns. This can cause large circulating currents, which lead to high power losses, heating, and consequently further short circuits in the system. In mathematical modeling, this adds another dimension for the shorted turn to the system. Modelling a system with an interturn fault is the first step for the necessary diagnosis, prevention, and correction measures. This paper develops a mathematical dynamic model for a multiphase multi-circuit induction generator with 6 stator phases and 3 rotor phases for the application in the wind turbine systems.