Title: Analysis and design of IMC-PI controller with faster set point tracking and disturbance rejection for interleaved DC-DC SEPIC converter-based power factor correction

Authors: C. Komathi; M.G. Umamaheswari

Addresses: Department of Electronics and Instrumentation Engineering, Sri Sairam Engineering College, Sai Leo Nagar, West Tambaram, Chennai-600044, Tamilnadu, India ' Department of Electrical and Electronics Engineering, Rajalakshmi Engineering College, Thandalam, Chennai-602105, Tamilnadu, India

Abstract: This paper deals with the internal model controller (IMC) - proportional integral (PI) controller for interleaved DC-DC single ended primary inductance converter (SEPIC)-based power factor correction (PFC). The transfer function of the proposed converter exhibits seventh order dynamics with complex right hand plane (RHP) poles and zeros. IMC-based PI controller is used to achieve perfect control since it contains the internal model of the process implicitly or explicitly. The cascade control strategy is implemented for the proposed converter with IMC-based PI controller as inner current and outer voltage controller. The dynamic and steady state performance parameters of the proposed scheme are evaluated using MATLAB/Simulink software. The simulation results reveal that the proposed scheme offers excellent stability characteristics, robustness, faster set point tracking and disturbance rejection for various uncertainties in the process as compared to conventional PI controller.

Keywords: power factor correction; internal model controller; PI controller; total harmonic distortion; interleaved DC-DC SEPIC converter.

DOI: 10.1504/IJPELEC.2021.111855

International Journal of Power Electronics, 2021 Vol.13 No.1, pp.1 - 20

Received: 18 Jan 2018
Accepted: 05 Jul 2018
Published online: 17 Dec 2020 *

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