A New Diagnosis Method of PMSG for Wind Energy Conversion Systems Based on Direct power control

This paper investigates converter fault diagnosis for wind energy conversion system (WECS) based on permanent magnet synchronous generator. The direct power control (DPC) strategy is adopted to control the instantaneous active and reactive powers in order to maintain the DC bus voltage at the required level, using the PI controller in the DC voltage control loop. A fault detection scheme for switch device open-circuit faults is proposed in this study. The proposed diagnostic method is developed using mathematical transformations such as a hysteresis detector, an integrator and a trigger. Several simulation are displayed to show the effectiveness and feasibility of the proposed method.