• R. Sheba Rani
• C.Srinivasa Rao
• M.Vijaya Kumar

For medium voltage and high power applications, multilevel inverter has been accepted as a better alternative as it has good waveform quality, better performance and is comprised of switching devices subjected to low stresses. Among the various topologies of multilevel inverters, Cascaded H-bridge inverter has been found as more reliable, easy to design and has satisfactory performance. This paper analyses the performance of single phase 5- level Cascaded H-bridge inverter. The performance of the inverter is analyzed through simulation using Phase Shifted Pulse Width Modulation (PSCPWM) and Level Shifted Pulse Width Modulation technique (LSPWM). LSPWM can be classified into three subgroups i.e. Phase Disposition (PD), Phase Opposition Disposition (POD) and Alternate Phase Opposition Disposition (APOD). PSCPWM technique and various methods of Level Shifted PWM techniques are implemented for Single Phase Five Level Cascaded H-Bridge inverter. Simulation results are obtained using MATLAB/ SIMULINK and %THD comparisons are tabulated.

Cascaded H-bridge Multilevel Inverter, Level Shifted Pulse Width Modulation, Phase Shifted Pulse Width Modulation, Phase Disposition, Phase Opposition Disposition, Alternate Phase Opposition Disposition, Total Harmonic Distortion

"A review of Modulation Schemes for Single phase Five- Level Cascaded Multilevel Inverter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 11, page no.453-460, November-2017, Available :http://www.jetir.org/papers/JETIR1711081.pdf

"A review of Modulation Schemes for Single phase Five- Level Cascaded Multilevel Inverter", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 11, page no. pp453-460, November-2017, Available at : http://www.jetir.org/papers/JETIR1711081.pdf