Comparison of the various irregular pulse density modulation (PDM) control pattern lengths for resonant converter with photovoltaic (PV) integration
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Date
2021
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Journal of the Faculty of Engineering and Architecture of Gazi University
Abstract
In this study, the maximum power obtained from photovoltaic (PV) panels was transferred the load using
the proposed 8, 16 and 32 irregular pulse density modulation (PDM) pattern controlled series resonant
converter. In the study, changes in the system occurred due the variations in PDM pattern lengths were
analyzed. The output power was controlled by providing maximum power point tracker (MPPT) at different
solar irradiation values with varying PDM pattern lengths. Zero current switching (ZCS) conditions were
achieved by using phase locked loop (PLL) technique at each power point of the PV system. Therefore, soft
switching was realized by continuously tracking the appropriate switching conditions at the resonant
frequency. Incremental conductance (IC) algorithm was used to track the maximum power in PV panels and
tracking efficiency of a novel PDM controlled IC MPPT algorithm was obtained above 99%.
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Keywords
Resonant converter, PDM control, MPPT, PLL