Adaptive Extended State Observer Based Direct Voltage Sliding Mode Control of Stand-Alone DFIG-DC System

Abstract

Based on the in-depth analysis of the mathematical model of the doubly-fed induction generator (DFIG), this paper proposes a direct voltage control (DVC) method that combines a high-order adaptive extended state observer and super-twisting sliding mode control for the doubly-fed power generation system. DVC can reduce the number of control variables and sensors, and improve the response speed of the system when dealing with large load disturbances. At the same time, adaptive extended state observer (AESO) adopts a variable gain strategy that is adaptively adjusted according to disturbances, and has both excellent anti-noise and anti-interference capabilities. It combines the advantages of linear extended state observer (LESO) and nonlinear extended state observer (NESO). Finally, simulation prove the effectiveness of the proposed method.