Design of integral sliding mode control and fuzzy adaptive PI control for voltage stability in DC microgrid

Frontiers in Energy Research

Energy Research

Mofan Wei¹  Xinyu Zhang²  He Jiang²  Yan Zhao² 

[1]School of Electrical Engineering, Shenyang University of Technology, Shenyang, China

[2]School of Renewable Energy, Shenyang Institute of Engineering, Shenyang, China

[3]Liaoning Key Laboratory of Regional Multi-Energy System Integration and Control, Shenyang, China

关键词: sliding mode control;    fuzzy control;    adaptive PI control;    DC microgrid;    voltage stability;   

DOI  :  10.3389/fenrg.2023.1278305

 received in 2023-08-16, accepted in 2023-09-18,  发布年份 2023

来源: Frontiers

【 摘 要 】

This paper introduces a novel control strategy that merges integral sliding mode control with fuzzy adaptive PI control. This hybrid approach maximizes the benefits of both techniques to ensure voltage stability in DC microgrid. Firstly, a mathematical model characterizes the DC–DC boost converter. Subsequently, a sliding surface, incorporating an integral term, is employed to regulate the converter’s output voltage and current errors. To address uncertainties stemming from factors like input inductance and output capacitance, a dynamic sliding mode controller is formulated. The proposed sliding mode control scheme significantly reduces the time required for voltage stability, curbs system oscillations, and showcases robustness. Furthermore, the inclusion of fuzzy adaptive PI control aids in refining the voltage deviation signal and droop resistance. This enhancement improves the precision of the error tracking system. Finally, the effectiveness of this strategy is demonstrated through MATLAB simulations, supported by experimental validation and analysis. The findings reveal that this control strategy efficiently accelerates the convergence of DC microgrid voltage to a stable state.

【 授权许可】

Unknown   
Copyright © 2023 Zhang, Zhao, Jiang and Wei.