Single-phase distributed generation system based on asymmetrical cascaded multilevel inverter

A single-phase distributed generation system (DGS) is proposed for residential power generation. It is based on an utility-interactive asymmetrical cascaded multilevel inverter with 19 levels, which is supplied by asynchronous voltage sources. It is possible to operate continuously the proposed DGS during the grid-connected or the stand-alone modes. Details about its operation modes are presented. A prototype has been implemented on a fixed-point DSP TMS320F2812. An injection of only active power into the grid utility and an uninterrupted load supply have been pursued. Simulation and experimental results presents the performance of the proposed DGS operating under normal and abnormal conditions.