Power frequency transformer-less grid connected photovoltaic arrays with reduced DC sources and electronic components

Photovoltaic system is one of the most promising renewable energy to meet the energy demand and reduce the global warming. Making the photovoltaic system efficient and compact is a challenge for the researchers. Multilevel inverters with high frequency transformer link eliminate the use of power frequency transformer for direct grid connected photovoltaic arrays. In this paper using high frequency transformer link a fifteen level inverter for 11 KV system is proposed with reduced dc sources and electronic components.