ANALYSIS OF PV CELL FED CASCADED HBRIDGE MULTILEVEL INVERTER USING PD AND POD PWM

The solar photovoltaic (PV) module directly converts the light energy into the electrical energy, but energy obtained from the PV module acts as low voltage DC source and has relatively low conversion efficiency. In order to improve the efficiency and convert low voltage DC source into usable AC source, the power electronics converters are used to transform DC into AC. In this paper Cascaded H-Bridge Multilevel inverter using PV Cell is used to convert DC voltage into AC voltage. A multilevel inverter promises fewer harmonics and are capable to function at low switching frequency as compared to two level inverters. Renewable sources can be connected to the ac grid with the help of the MLIs, where high quality AC waveforms can be obtained. In this paper, Cascaded H-Bridge Inverter using PV cell is discussed for various levels. The output waveforms for both current and voltage are obtained by implementing phase disposition and phase opposition disposition pulse width modulation techniques using MATLAB/ SIMULINK. The harmonic distortions are analyzed for three level, five level, fifteen level and twenty five level CHMLIs.