Full-Order Sliding-Mode Current Control of Permanent Magnet Synchronous Generator With Disturbance Rejection

To address the stochasticity issues of wind power generation, this article proposes an anti-disturbance full-order sliding-mode control (FOSMC) strategy for the current control of permanent-magnet synchronous generator (PMSG)-based wind energy conversion systems (WECSs). An extended state observer (ESO) is designed to estimate the uncertainty of the external disturbances and internal model parameters in real time. An FOSMC strategy is designed for the current control of the PSMG. The FOSMC uses a continuously controlled sliding mode to solve the chattering problem and the disturbances estimated by the ESO to improve the antidisturbance capability while ensuring finite-time convergence of the system states. Experimental results for a 900 W emulated PMSG-based WECS are provided to validate the superior current tracking, chattering suppression, and antidisturbance performance of the proposed ESO-FOSMC strategy over a sliding-mode current controller using the same ESO for antidisturbance.