Adaptive Global Fast Terminal Sliding Mode Control for MPPT of Direct-driven PMSG

摘要

In order to realize maximum power point tracking (MPPT) of direct-driven permanent magnet synchronous generator (D-PMSG), a novel adaptive global fast terminal sliding mode control (GFTSMC) method is proposed in this paper. Firstly, considering internal and external disturbances of system, a nonlinear mathematical model of D-PMSG is established. Then according to the characteristics of D-PMSG and control requirements, the controllers based on GFTSMC for speed loop and current loop are designed respectively which could accelerate the convergence speed of system. Moreover, the adaptive method is used to compensate the disturbances, eliminating the chattering and improving the robustness of whole system. The simulation results show that compared with other types of terminal sliding mode controllers, the proposed controllers are better for the system to track the maximum power point.