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To improve light load efficiency, a three-phase photovoltaic (PV) based microinverter may operate in single-phase, two-phase or three-phase mode depending on the available input power. Therefore, its DC link capacitor may be subjected to large peak-to-peak voltage ripple when operating in phase skipping mode. This paper determines the minimum value of the DC link capacitor by allowing the maximum...
In the three-phase micro-inverter developed at the Florida Power Electronic Center (FPEC), maximum efficiency is achieved when it is operating at close to its rated power. At lower power, load independent loss becomes a larger part of the overall loss and negatively impacts efficiency. It is therefore advantageous to operate each phase as close to its rated power as possible. One way to accomplish...
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