Modulated Predictive Current Control of PMSG-Based Wind Energy Systems

فاقد چكيده فارسي

Abstract—In this paper, an efficient modulated model predictive current control of back-to-back connected voltage source converter in direct-driven surface-mounted permanent magnet synchronous generator-based variable-speed wind energy conversion system is presented. The proposed control scheme fulfils the wind energy requirements such as maximum power point tracking, control of DC-link voltage and grid reactive power regulation through the control of generator and grid currents with fast transient response, smooth steady-state and fixed switching frequency operation simultaneously. The proposed controller predicts the future behavior of generator and grid currents using quasi-exact discrete-time models and eight voltage vectors, and then evaluates them by two independent cost functions. The two active vectors and a zero-vector corresponding to the optimal cost functions are synthesized by the space vector modulation. The feasibility of the proposed method is verified through simulation results using a 750-kW wind energy system at different wind speeds and grid reactive powers.