Torsional Torques Analysis in Wind Energy System under Symmetrical and Unsymmetrical Faults

The paper presents a comprehensive study of the torsional and electromagnetic torques analysis for fixed speed wind energy system type-l when it is subjected to symmetrical and unsymmetrical faults. A detailed model is developed to simulate the dynamic behavior of the wind energy system elements which includes wind turbine, induction generator and drive train. This study is intended to analyze deeply the corresponding torques of the induction generator and a special attention is given to investigate the shaft torsional torque happened during the fault current. The simulation results show that there is a high negative impact appeared on the generator torque at the instant of fault followed by higher hazardous torsional shaft torques which may resulting a fatigue impact on the driving shaft.