Improved SSJ-MPPT Method for Maximum Power Point Tracking of Photovoltaic Inverter Under Partial Shadow Condition
When a photovoltaic array is partially shadowed, a plurality of maximum points appears at the output of the photovoltaic array. If a plurality of maximum points appears, the conventional maximum power point tracking (MPPT) method cannot follow the maximum power point reliably. Therefore, a new method is required to follow the maximum power point under partial shadowing conditions. The SSJ-MPPT method can follow the maximum power point under partial shadowing. Although this method can quickly follow the maximum power point, the search time becomes longer if the voltage at the maximum power point is large. Therefore, we herein propose the ESSJ-MPPT method to address the disadvantage of the SSJ-MPPT method, and verify it via simulation and experiment.
KeywordsMaximum power point tracking Photovoltaic arrays Partial shade Global maximum power point tracking
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (No. NRF-2017R1D1A1B03031532).
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