Implementation of Dual Control Maximum Power Point Tracking-Based DC-DC Converter Fed Solar PV Power Application

This article presents an effective power extraction methodology from photovoltaic (PV) with a front end dc-dc Resonant converter with dual control. Usually, conventional dc-dc boost converter shows lower efficiency and extra components for soft-switching. Furthermore, converter power transfer efficiency for PV integration is limited. Hence, to address these challenges this article investigates an isolated dc-dc resonant converter with proposed control to attain wider voltage regulation with maximized PV power generation. In addition, this converter can achieve zero-voltage switching under wider operating loads. The proposed control method improves the efficiency even under light load condition without effecting digital-signal-processor resolution, along with a simple pertub and observe maximum power point PI control approach. A 2.2-kW prototype is built and operated to interface PV system and to verify the performance over entire load. The peak efficiency of the converter is found to be 98.7% at (1.1-kW) 50% of the full load.

Automated summary

This article presents an effective method of power extraction from photovoltaic (PV) using a front-end DC-DC resonant converter with dual control. The conventional boost converter has lower efficiency and requires extra components for soft-switching. Additionally, the power transfer efficiency for PV integration is limited. To address these challenges, an isolated DC-DC resonant converter with proposed control is investigated in this article, achieving wider voltage regulation and maximized PV power generation. The proposed control method improves efficiency even under light load conditions without affecting the digital signal processor resolution, and uses a simple perturb and observe maximum power point PI control approach. A 2.2-kW prototype is built and operated to verify the performance over the entire load, with a peak efficiency of 98.7% at 50% of the full load (1.1 kW).