Different Types of Multilevel Inverters

Multilevel inverter technology has emerged recently as a very important alternative in the area of high-power, medium-voltage energy control. In India, the demand daily is increasing at the maximum electric power generation based on non-renewable energy sources. In the future, renewable energy sources like solar energy will be the most easily available and most comfortably used. But the solar panel generation is DC output. But for the utilization of this power, any appliance works AC. It needs to be converted to AC. The inverter is the power electronic modulator. Multilevel types inverter which takes multiple DC sources and gives AC output for desired voltage and frequency. The project mainly focused on developing a multilevel inverter for our application using solar energy and the elimination of harmonic. Elimination stepped waveforms methods can implemented to eliminate the lower order harmonics. The topology that we will use is suitable for any number of levels. A standard multilevel inverter, one type cascade, requires an ’n’ DC source for the ’2n+1’ level.A fundamental switching scheme can be used in the circuit to eliminate a particular harmonic order. In this project, the simulation of a single-phase, seven-level cascaded multilevel inverter with selected switching angles and a harmonic filter is done using MATLAB SIMULINK software. The output of simulation contains 5.30017% harmonics, which means we have reached the output voltage nearer to the sinusoidal wave-forms at least in software simulation