Impact of Inter-Turn Short-Circuit Fault on Wind Turbine Driven Squirrel-Cage Induction Generator Systems

Overview & Synopsis

—This study aims to assess the impact of inter-turn short-circuit in stator windings of squirrel cage induction generators on variable-speed wind turbine systems. The short-circuit fault detection is based on a steady-state technique which is Motor Current Signatures Analysis (MCSA). Thus, theoretical developments of both healthy and faulty three-phase squirrel-cage induction generator of the wind turbine system models in the abc-reference frame are made to recognize the current signature variations. Simulation results are carried out to illustrate the severe consequences of inter-turn short-circuit fault on the generator signatures and moreover on the whole system. This work highlights the importance of the existence of a robust monitoring and diagnosis system for wind turbine systems. Keywords—stator inter-turn short-circuit, modeling wind turbine system, healthy mode, faulty mode, Motor Current Signatures Analysis …