Title: Modelling, analysis and control of bidirectional SEPIC converter for energy storage applications

Authors: Arnab Ghosh; Jayadev Meher; Santosh Sonar; Subrata Banerjee

Addresses: Department of Electrical Engineering, National Institute of Technology Rourkela, Rourkela-769008, India ' Department of Electrical Engineering, National Institute of Technology Rourkela, Rourkela-769008, India ' Department of Electrical and Instrumentation Engineering, Thapar Institute of Engineering and Technology, India ' Department of Electrical Engineering, National Institute of Technology Durgapur, Durgapur-713209, India

Abstract: Energy storage systems appear to be a very promising field of research for the rapidly increased requirements of the applications of renewable sources in daily life. The DC-DC bidirectional converters (BDCs) are globally known for their versatile applications in battery chargers, electric vehicles (EVs), solar PV modules with energy storage systems, smart/microgrid, telecommunication systems, etc. Such demanding applications are mostly essential for suitable bidirectional converters for delivering the energy in both directions. In this work, the closed-loop analysis, modelling and control of a DC-DC bidirectional SEPIC converter with classical controllers [such as proportional integral derivative (PID) controller, type-II controller and type-III controller] and advanced controller [such as internal model controller (IMC)] are demonstrated. The bidirectional SEPIC converter has been modelled here by using the state-space averaging (SSA) method. It is noticed that the bidirectional converter with IMC shows better controlling action compared to other classical control algorithms for its better steady state and transient responses. Finally, experimental verification of proposed closed-loop converter control is performed.

Keywords: bidirectional SEPIC converter; small signal analysis; classical controllers; advanced controller; energy storage system.

DOI: 10.1504/IJPELEC.2023.129974

International Journal of Power Electronics, 2023 Vol.17 No.3, pp.299 - 332

Received: 22 Sep 2020
Accepted: 21 Sep 2021
Published online: 04 Apr 2023 *

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