Abstract
Differential mode Three-phase Micro inverter DTMI has many features in low voltage application such as module integrated PV architectures. It has the ability to increase the PV module voltage using single stage with low components count. Differential inverter is implemented using three DC-DC converters with their input terminals connected in parallel and their outputs terminals connected differentially to perform three-phase voltages. Isolated DC-DC converters such as Flyback, Cuk and SEPIC converters have imperative inherent features to be utilized in differential inverter such as high voltage gain and voltage isolation. Moreover, the wide voltage range provided by buck-boost feature and low Common Mode Voltage CMV is substantial for micro inverters. This paper introduces full performance analysis for the three candidate differential inverters. Basic features such as voltage gain, voltage stress, efficiency and number of components are compared and illustrated in details. Also, simulation results for the three candidates are demonstrated to conclude the principal features of each one.
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