An efficient switched inductor–capacitor‐based novel non‐isolated high gain SEPIC for solar energy applications. (14th October 2022)

• Record Type: Journal Article
• Authors: Chandra, Surabhi; Gaur, Prerna
• Is Part Of: International journal of circuit theory and applications. Volume 51:Number 3(2023)
• Page Start: 1286
• Page End: 1312
• Publication Date: 2022-10-14
• Subjects: high gain SEPIC -- maximum power point tracking (MPPT) -- OP4510 real‐time simulator -- perturb & observe (P&O) -- solar energy; Electric circuit analysis -- Periodicals; 621.319205
• DOI: 10.1002/cta.3454
• Languages: English
• ISSNs: 0098-9886

Abstract

Abstract: The solar photovoltaic (PV) sources have low voltage output and hence cannot be used directly in micro‐grid applications. Therefore, to boost the low voltage output, a novel high gain single‐ended primary inductor converter (SEPIC) is proposed in this manuscript. The proposed high gain SEPIC (HGS) has an advantage of obtaining high voltage gain at a low duty ratio and continuous input current, which makes it viable for PV applications. The proposed converter offers simple control, and the high gain is obtained without the use of any transformer or coupled inductor so the semiconductor switch will not experience a voltage overshoot during the turn‐off operation. Hence, the conduction losses of the converter switch are reduced, and the performance of the converter is enhanced. Additionally, this manuscript also investigates the effectiveness of the proposed HGS in integration with the PV array. An extensive performance evaluation of the proposed HGS is investigated and compared with different SEPIC topologies in irradiance change conditions. Experimental implementation of the proposed HGS confirms the theoretical analysis and verifies the performance. Also, the real time (RT) analysis of the proposed HGS with PV array is conducted to show the validation of high gain operation for the PV application. Abstract : A novel high gain single‐ended primary inductor converter (SEPIC) is proposed in this manuscript to obtain high voltage gain at low duty ratio. The use of transformer or coupled inductor to obtain high voltage is eliminated, so the semiconductor switch will not experience a voltage overshoot during the turn‐off operation. Hence, the conduction losses of the converter switch are reduced and the performance of the converter is enhanced. The continuous input current of the proposed converter makes it viable for solar PV applications.