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The Maximum power point tracking (MPPT) algorithms are widely used in micro-inverters to maximize the PV panel's output power. The perturb and observe (P&O) algorithm is the most commonly used method due to its simple implementation. However, since the switching frequency of the BCM micro-inverter is variable, the switching duty ratio or the panel voltage could not be simply used as the perturbed...
The micro-converter Photovoltaic (PV) system which is composed of several cascaded Buck-Boost converters and a central inverter, enables each PV panel to operate at its local maximum power point (MPP). The cascaded buck-boost converter can operate in buck, boost or pass-through mode to realize a wide output voltage range without inverted polarity. However, there is a difficulty in keeping power balance...
A flyback converter that operates in the boundary conduction mode or discontinuous conduction mode has been widely used in microinverters. Placing two flyback converters in parallel and utilizing interleaving can extend the power range of microinverters. Interleaving phases between the two converters should be carefully regulated in order to reduce the switching current ripple. In this paper, two...
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