A 15-level asymmetric cascaded H bridge multilevel inverter with less number of switches for photo voltaic system

This Paper presents a 15 level Asymmetrical Cascaded H bridge multilevel inverter Topology for Photovoltaic system. In this system Symmetrical and Asymmetrical Multilevel inverter (MLI) is utilized. In Symmetrical MLI, the DC source magnitude are equal ie., 50Vdc, 50Vdc & 50Vdc., where as in Asymmetrical MLI the DC source Magnitude are unequal and it is designed with binary form of voltage such as 50Vdc, 100Vdc & 200Vdc. Comparing both the MLI, Asymmetrical MLI generates a number of output voltage level with same number of Power semiconductor switches. The phase Disposition Pulse Width Modulation (PD-PWM) technique is used for controlling the Power semiconductor switches in MLI. The results are verified in both MATLAB and PROTEUS.