An Efficient Dual Control Scheme with Output Voltage Regulation and INC Based MPPT for a PV System with Three Level Boost Converter

An efficient dual control strategy for a photovoltaic application with a DC-DC Three-Level Boost Converter (TLBC) has been put forth in this work. Due to the great efficiency on voltage stress reduction, higher bosting capability and minimal inductor size, TLBC has better performance over Conventional Boost Converter (CBC) and thus being used as a PV fed converter. In order to achieve the maximum power, Incremental Conductance based tracking performance for variable load and variable irradiance, has been implemented here. A Proportional Integral (PI) based output voltage control scheme is also integrated with this system for load voltage regulation. To balance out the MPPT and Output Voltage Control throughout Variable Load, a Power Hysteresis Control (PHC) has been incorporated as well. Additionally, the performance of the (INC) technique for MPPT control is assessed and analyzed with that of the conventional Perturbation & Observe (P&O) technique. This method provides a convenient workaround for fluctuating load conditions. The system under investigation is modelled in MATLAB/Simulink, and the various conditional responses are investigated under all conceivable operational circumstances.