DefinePK

Abstract

Multi level inverters (MLIs) have been attractive for high power applications. Among the various MLIs, the Cascaded H-Bridge inverter is promising for grid connected wind power and photovoltaic applications. This paper compares three types of MLIs namely the Neutral Point Clamped, the Flying Capacitor and the Cascaded H-Bridge. In addition, the Cascaded H-Bridge MLIs with a single DC source is presented. These MLIs are simulated in MATLAB using multi-carrier sine pulse width modulation (MCPWM) technique. Simulated output voltages and currents for an RL load are shown for the four configurations and compared based on the total harmonic distortion (THD). Results obtained show the applicability of Cascaded H Bridge inverter with a single DC source for grid connected wind power applications.