Study on Single-Loop FCS-MPC for DC-Based DFIG System

Doubly fed induction generator (DFIG) system suffers from complex control structure, slow dynamic response speed and cumbersome parameter design due to its traditional cascaded dual-loop strategy. A single-loop finite set model predictive (SLMPC) is proposed in the paper for DC-based DFIG DC grid, which simplifies structure design, enhances response. There are three improved aspects. First, eliminate intermediate link enhance Second, reduced-order discretization algorithm by differential integral method reduce strategy (FCS-MPC) difficulty. Third, cost function with nonlinear additional current limiting designed protect overcurrent effectively. Finally, feasibility of verified simulations experiments.