Robust Switching Gain-Based Fractional-Order Sliding Mode Control for Wind-Powered Microgrids. (24th March 2021)

• Record Type: Journal Article
• Authors: Zhou, Minghao; Cheng, Siwei; Xu, Long; Wang, Likun; Guo, Qingbo; Cai, William
• Other Names: Tang Ruoli Academic Editor.
• Is Part Of: Complexity. Volume 2021(2021)
• Publication Date: 2021-03-24
• Subjects: Chaotic behavior in systems -- Periodicals; Complexity (Philosophy) -- Periodicals; 003
• DOI: 10.1155/2021/6697792
• Languages: English
• ISSNs: 1076-2787

Abstract

Abstract : This study proposes a novel fractional-order sliding-mode control strategy with robust switching gain to achieve reliable and high quality of wind-powered microgrid systems. Three fractional-order sliding mode controllers are designed to generate continuous control signals and regulate the outer DC-link voltage loop and inner current loop in the grid-side inverters. High robustness and stability of the grid-side inverter can be guaranteed even in the presence of parameter variations and external disturbances. Owing to the fractional-order sliding manifold and fractional-order integral control law, the chattering is attenuated. The fractional-order robust adaptive switching gain is designed to avoid overestimating the upper bound of matched/unmatched uncertainties, save the control energy, and guarantee the rapidity and robustness of the convergence. Simulations validate the proposed method.