A High-Gain Multi-Input DC-DC Converter and Modified Fifteen-Level Inverter for PV-Based Grid and EV Charging Applications

Shareef Shaik

doi:https://doi.org/10.14445/23488379/IJEEE-V13I3P112

Research Article | Open Access | Download PDF

Volume 13 | Issue 3 | Year 2026 | Article Id. IJEEE-V13I3P112 | DOI : https://doi.org/10.14445/23488379/IJEEE-V13I3P112

A High-Gain Multi-Input DC-DC Converter and Modified Fifteen-Level Inverter for PV-Based Grid and EV Charging Applications

Shareef Shaik, P. Venkatesh, E. Parimalasundar

Received	Revised	Accepted	Published
10 Dec 2025	11 Jan 2026	17 Feb 2026	31 Mar 2026

Citation :

Shareef Shaik, P. Venkatesh, E. Parimalasundar, "A High-Gain Multi-Input DC-DC Converter and Modified Fifteen-Level Inverter for PV-Based Grid and EV Charging Applications," International Journal of Electrical and Electronics Engineering, vol. 13, no. 3, pp. 152-168, 2026. Crossref, https://doi.org/10.14445/23488379/IJEEE-V13I3P112

Abstract

Efficiency of renewable energy conversion systems is gaining momentum with the trend toward compact power conversion architectures, which provide interfacing between low-voltage photovoltaic sources and medium-voltage Alternating Current (AC) systems while maintaining satisfactory quality. Conventional multilevel inverter topologies like Neutral-Point-Clamped (NPC), Flying Capacitor (FC), and Cascaded H-Bridge (CHB) abnormalities lead to huge devices, switching losses, and system complexity. For the first time, this article presents an integrated power conversion structure in which a high-gain single-input multi-output Direct Current (DC)-DC converter is combined with a reduced-switch fifteen-level DC–AC multilevel inverter to overcome these limitations. The system defined in this work produces many regulated DC voltage levels from one Photo Voltaic (PV) source and implements these asymmetrical voltages to synthesise a stepped multilevel AC through higher-voltage utilisation and decreased components required. In such a study, a sinusoidal pulse-width modulation control strategy is adopted to ensure stable driving operation and synthetic voltage in various loads. Simulation results indicate that the configuration achieves an output Root Mean Square (RMS) voltage of 230 V and a peak voltage of 325 V with enhanced harmonic performance, with a Total Harmonic Distortion (THD) for current and voltage at 3.9% and 2.8%, respectively. Moreover, the reduced active switches and absence of clamping diodes lower switching and conduction loss to 68 W and 54 W, respectively, leading to a total power dissipation of 122 W and a maximum efficiency of 96.4%. Therefore, the proposed architecture provides a compact and efficient solution for grid-connected photovoltaic systems, electric vehicle charging infrastructure, and distributed renewable energy applications that require high-quality power conversion.

Keywords

DC-DC Converter, Electric Vehicle Charging Infrastructure, Multilevel Inverter, Power Quality Improvement, Renewable Energy Systems, SDG 7-Affordable and Clean Energy, SDG 11-Sustainable Cities and Communities, Sinusoidal PWM control.

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