Design and Control of Four-Port Non-Isolated SEPIC Converter for Hybrid Renewable Energy Systems

Anuradha Chandrasekar (), Vijayalakshmi Subramanian, Narayanamoorthi Rajamanickam, Mohammad Shorfuzzaman and Ahmed Emara ()
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Anuradha Chandrasekar: Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603 203, Tamil Nadu, India
Vijayalakshmi Subramanian: Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603 203, Tamil Nadu, India
Narayanamoorthi Rajamanickam: Department of Electrical and Electronics Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai 603 203, Tamil Nadu, India
Mohammad Shorfuzzaman: Department of Computer Science, College of Computers and Information Technology, Taif University, Taif 21944, Saudi Arabia
Ahmed Emara: Electrical Engineering Department, University of Business and Technology, Jeddah 23435, Saudi Arabia

Sustainability, 2024, vol. 16, issue 19, 1-24

Abstract: A new four-port non-isolated SEPIC converter intended for hybrid renewable energy systems is presented in this study. The suggested converter minimizes space and expense by integrating two inputs and two outputs in a single-stage structure with fewer components. The converter retains important characteristics including continuous input current, buck/boost capability, non-inverting output, and enhanced power factor because it is based on the fundamental SEPIC topology. It effectively combines an energy storage system (ESS) with a variety of energy sources that have different voltage and current characteristics. The converter can be configured to operate in unidirectional or bidirectional topologies depending on whether storage elements are included. Performance is examined in two operating modes, with an emphasis on the ESS’s charging and discharging processes. System equations are produced by steady-state analysis, and the design of a closed-loop controller for accurate input power and output voltage regulation is informed by dynamic analysis performed with the state-space approach. Through real-time hardware implementation and MATLAB/Simulink simulations, the efficacy of the suggested design is verified, demonstrating the open-loop unidirectional topology’s theoretical and practical validity.

Keywords: multi-port converters; pulsating voltage source cell; pulsating voltage load cell; four port converter; energy management (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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