HF transformer based grid-connected inverter topology for photovoltaic systems.

Inverters are required to convert the dc power from photovoltaic panels to ac. In grid connected inverters, the ac output is directly fed into the electric grid. In this paper, a high-frequency transformer based inverter topology is presented. This leads to a very compact inverter. The modulation of this inverter with a lossless snubber circuit is proposed. Proposed modulation eliminates the over-voltage spikes due to transformer leakage inductance. Commutation of the leakage inductance energy with this modulation is also discussed. The performance of the inverter with the proposed modulation is validated using simulation and experimental results. [ABSTRACT FROM AUTHOR]