Title: Single switch high voltage gain DC-DC converter for renewable energy applications

Authors: Karri V.V. Satyanarayana; Rakesh Maurya

Addresses: Department of Electrical Engineering, Institute of Technology, Nirma University, Ahmedabad, Gujarat 382481, India ' Department of Electrical Engineering, Sardar Vallabhbhai National Institute of Technology, Surat 395007, India

Abstract: In a DC microgrid, the integration of renewable energy sources (RES) is necessary to meet the regular load demands of electricity. The generating voltage of RES are at low level. So, the requirement of high voltage gain converters is essential for the function of grid-forming or grid-feeding converters. This paper presents a non-isolated DC-DC converter with features of high voltage gain and high efficiency. This converter functioning with single switch and passive components in which two inductors and one capacitor are connected in parallel/series during ON state/OFF state of switch respectively. The detailed operation of this converter under CCM and DCM modes with necessary voltage and current waveforms are discussed. The efficiency analysis and state space average modelling of proposed converter is presented. The comparative analysis of single switch topologies is also presented with few selected converters. The theoretical analysis of proposed converter is validated through prototype model designed in laboratory environment and obtained results are presented.

Keywords: switching losses; high voltage gain; duty ratio; continuous conduction mode and efficiency.

DOI: 10.1504/IJPELEC.2024.135701

International Journal of Power Electronics, 2024 Vol.19 No.1, pp.1 - 23

Received: 18 May 2022
Accepted: 09 Jan 2023
Published online: 23 Dec 2023 *