A novel single stage, transformerless PV inverter

Abstract

This paper presents a novel single stage, single phase, common ground, transformer-less inverter for PV application. The ideal gain of the inverter is minus infinity to plus infinity. Converter is derived from intelligent circuit connections of Ćuk converter and Watkins-Johnson converter. The control to output transfer function contains right half plane (RHP) zeros, which leads to a limited closed loop bandwidth. This limitation is overcame by current programmed controller. Analytical foundations are followed by simulation results.