Design of a Switched Capacitor and Inductor-Based High Gain DC-DC Converter for DC Grid-Connected Solar PV Applications
نویسندگان
1 Department of Electrical and Electronics Engineering, Vels Institute of Science, Technology and Advanced Studies, Chennai, India.
2 Department of Electrical and Electronics Engineering, Vels Institute of Science, Technology and Advanced Studies, Chennai, India.
doi
10.30501/jree.2025.497468.2220چکیده
This paper proposes a novel non-isolated switched-capacitor and switched-inductor high-gain (NI-SC-SI-HG) converter for low-voltage (LV) solar photovoltaic (PV) module-fed direct-current (DC) microgrid systems. The primary objective is to achieve a high output voltage at a lower duty ratio using the NI-SC-SI-HG topology. The study investigates the voltage gain, device stresses, efficiency, and component count, with a detailed comparison to existing high-gain converters. The theoretical operation of the proposed converter is presented comprehensively, illustrating current paths under both continuous conduction mode (CCM) and discontinuous conduction mode (DCM). Mathematical analyses of each operating state are provided to support the design and performance evaluation. The proposed converter facilitates the integration of LV solar systems with DC microgrids. Additionally, its implementation in solar PV-fed applications is examined under varying irradiance conditions. Maximum power extraction is achieved using a simple perturb-and-observe (P&O) algorithm. MATLAB 2024a simulation waveforms are provided to illustrate the converter’s dynamic performance. To validate the theoretical and simulation results, a 220 W, 380 V prototype of the NI-SC-SI-HG converter was developed and tested, confirming its effectiveness and practical applicability.
