Single Phase Grid Interactive Solar Photovoltaic Inverters: A Review

Nowadays, single phase inverters are extensively being implemented for small scale grid-tied photovoltaic (PV) system. Small size PV inverters are replacing the central inverters. These inverters convert and transfer the power supplied by the single or a string of modules to the grid. Following this trend, various single phase inverters from conventional full bridge (H4) to more complex topologies have been introduced in the past few years. In this paper, single phase PV inverter topologies are classified and reviewed. First, the topologies are classified on the basis of PV module configurations, galvanic isolation and power conversion stages. Then, each topology is discussed in detail, addressing their merits and demerits. Finally, the recent development and future prospects of grid connected PV systems are discussed.