Finite-Control-Set Model Predictive Control for Low-Voltage-Ride-Through Enhancement of PMSG Based Wind Energy Grid Connection Systems

Grid faults are found to be one of the major issues in renewable energy systems, particularly wind conversion systems (WECS) connected grid via back-to-back (BTB) converters. Under such faulty conditions, system requires an effective regulation active (P) and reactive (Q) power accomplish low voltage ride through (LVRT) operation accordance with codes. In this paper, improved finite-control-set model predictive control (FCS-MPC) scheme is proposed for a PMSG based WECS achieve LVRT ability under symmetrical asymmetrical faults, including mitigation DC-link fluctuation. With control, optimized switching states cost function minimization weighing factor (WF) selection guidelines established robust BTB converter reduced cross-coupling amid P Q during transient conditions. Besides, support provided by side inverter inject dips. The effectiveness FCS-MPC method compared conventional proportional-integral (PI) controller case faults. simulation experimental results endorse superiority developed diminish fault effect quickly lower overshoot better damping performance than traditional controller.