Fractional-Order Sliding-Mode Control and Radial Basis Function Neural Network Adaptive Damping Passivity-Based Control with Application to Modular Multilevel Converters

Xuhong Yang, Wenjie Chen (), Congcong Yin and Qiming Cheng
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Xuhong Yang: College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
Wenjie Chen: College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
Congcong Yin: State Grid Zhejiang Electric Power Co., Ltd., Yuyao Power Supply Company, Yuyao 315499, China
Qiming Cheng: College of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China

Energies, 2024, vol. 17, issue 3, 1-18

Abstract: This paper proposes a hybrid control scheme that combines fractional-order sliding-mode control (FOSMC) with radial basis function neural network adaptive damping passivity-based control (RBFPBC) for modular multilevel converters (MMC) under non-ideal operating conditions. According to the passive control theory, we establish the Euler–Lagrange (EL) models of positive and negative sequences based on the unbalanced grid. A passivity-based controller that satisfies the energy dissipation law is designed. To enable rapid convergence of the system energy storage function, a radial basis function neural network (RBFNN) is introduced to adjust the injection damping adaptively. Additionally, a fractional-order sliding-mode controller (FOSMC) is designed. The fractional-order sliding mode surface used can improve tracking performance, and effectively suppressed the undesirable chattering phenomenon compared to the traditional sliding-mode control (SMC). Finally, combining the two control methods can effectively solve the issue of passivity-based control (PBC) being too dependent on parameters. The proposed hybrid control scheme enhances the ability of the system to resist disturbances, and improves its overall robustness. Simulation results demonstrate the feasibility and effectiveness of this control method.

Keywords: modular multilevel converters; RBF neural network; fractional-order sliding-mode control; passive control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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