Experimental analysis of a single-input triple-output multilevel converter: A simplified cost-effective approach

This paper presents an isolated single-input triple-output converter architecture for photovoltaic applications and hybrid renewable systems. The converter features a shifted pulse modulation topology and integrates a unified control scheme based on pulse-width modulation and phase angle shift, allowing for independent regulation of the three voltage outputs. A maximum power point tracking (MPPT) strategy is implemented using an incremental conductance method enhanced with an integral regulator, ensuring fast convergence, reduced power oscillations, and high tracking accuracy under varying irradiance and load conditions. Voltage regulation is achieved through a proportional-integral controller using the modulation phase angle as the control variable. The converter supports decoupled load and battery port management while maintaining high efficiency and system stability. Simulation results in MATLAB/Simulink, corroborated by hardware experiments, demonstrate the converter’s ability to operate at up to 98% efficiency with low-ripple voltage outputs. Comparative evaluations confirm that the proposed incremental-conductance MPPT method with integral regulation outperforms conventional incremental-conductance and open-loop approaches, making it well-suited for real-time multi-port photovoltaic power delivery applications. • Experimental analysis of an efficient isolated three-port flyback-forward converter. • Obtaining multilevel modular and scalable voltage output for a broad range of dc voltage. • Integrating a regulator with maximum power point tracking by a control scheme.