Current-controlled resonant circuit based photovoltaic micro-inverter with half- wave cycloconverter

An electronically-controlled series resonant circuit based micro-inverter with a full-bridge inverter and a half-wave cycloconverter is proposed for single phase distributed photovoltaic (PV) systems rated up to 400W. A series resonant circuit and a high frequency transformer are used to couple the full-bridge inverter and the half-wave cycloconverter. Inductor of the series resonant circuit is used to control output current of the micro-inverter. The proposed current control strategy of the micro-inverter is mathematically analyzed. The proposed micro-inverter is simulated using the MATLAB/PLECS block set in order to verify feasibility of the proposed current control method in series resonant circuit based DC-AC converters. Experimental results are obtained to further validate the proposed current control method.