Publication

Abstract : The inverters for photovoltaic systems are important, since the DC power has to be converted to alternating supply to feed to AC loads. The power conversion stage includes an inverter and a transformer. If low frequency transformer is used, it provides galvanic isolation, but the total cost and size of the system will also increase. These issues can be addressed by using high frequency transformer. Even then the overall effi ciency of the system is less due to many conversion stages. Transformer-less inverter is one solution to overcome all the foresaid problems. Single stage DC-AC converter with zero voltage(ZVS) and zero current switching (ZCS) is more compact and energy effi cient. Therefore a transformer-less DC-AC single phase inverter is presented in this paper. The converter performance, switching waveforms are simulated using PSIM and are presented in the manuscript. The soft switching of the converter is experimentally validated.