• Deepati Satish
• P. Sai Srinivas

Photovoltaic energy conversion becomes main focus of many researches due to its promising potential as source for future electricity and has many advantages than the other alternative energy sources like wind, ocean, biomass, geothermal etc. In Photovoltaic power generation multilevel inverters play a vital role in power conversion. The three different topologies, diode-clamped inverter, capacitor-clamped inverter and cascaded h-bridge multilevel inverter are widely used in these multilevel inverters. Among the three topologies, cascaded h-bridge multilevel inverter is more suitable for photovoltaic applications since each photo voltaic array can act as a separate dc source for each h-bridge module. This paper presents a comparison of three phase cascade h-bridge 5-level and 9-level multilevel inverters for grid connected photovoltaic application using phase shifted pulse width modulation scheme. Multilevel inverters are basically used for high power applications as it helps in getting improved output waveform, nearly sinusoidal. As the levels obtained by multilevel inverters increased, harmonic content reduced but with this merit there are certain problems offered by it so to study this trade-offs the theoretical study made in this paper considers comparison of grid connected 5-level and 9-level cascaded h-bridge multilevel inverters.

Power Quality, Grid Connected PV Systems, Multilevel Inverter, Cascaded H-Bridge Multilevel Inverter, Phase Shifted PWM Technique

"COMPARATIVE ANALYSIS OF THREE PHASE 5-LEVEL AND 9-LEVEL MULTILEVEL INVERTERS FOR GRID CONNECTED PV SYSTEM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.4, Issue 10, page no.131-134, October-2017, Available :http://www.jetir.org/papers/JETIR1710018.pdf

"COMPARATIVE ANALYSIS OF THREE PHASE 5-LEVEL AND 9-LEVEL MULTILEVEL INVERTERS FOR GRID CONNECTED PV SYSTEM", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.4, Issue 10, page no. pp131-134, October-2017, Available at : http://www.jetir.org/papers/JETIR1710018.pdf