• Mr. Ajit Sukhadeo Yedge
• Prof.S.R. Kadam
• Prof.CH Mallareddy

Lately, a multilevel inverter takes an important role for medium voltage and high voltage-power applications. It has many advantages like minimum switching loss, more dv/dt stress, very low THD. But it has also drawbacks like for higher level required more switching devices, large size, more cost. This paper mainly proposed a newly invented topology with a reduced switches belongs to only eight switches, four voltage sources, and two power diodes to produce 21 level voltage waveforms. The major advantage of this proposed inverter ends in small size, lesser loss, along with low installation cost, and it is suitable for high voltage power applications. The simulation results for different switching angle calculation methods especially Equal Phase (EP) method and Half Height (HH) method are analyzed and presented. This proposed topology composes 8 switches, 4 power diodes and 4 voltage sources of different values. The outcomes of this proposed inverter topology results in small size, lesser loss, and very low installation cost. Besides, THD in the output waveform of the proposed inverter is low The proposed inverter has been simulated through MATLAB software.

Keywords— Multilevel inverter; Total Harmonic Distortion (THD); Equal Phase (EP) method; Half Height (HH) method

"Design and Development of 21 level Multilevel Inverter with reduced switches for Renewable Energy Applications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 10, page no.f197-f204, October-2023, Available :http://www.jetir.org/papers/JETIR2310424.pdf

"Design and Development of 21 level Multilevel Inverter with reduced switches for Renewable Energy Applications", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 10, page no. ppf197-f204, October-2023, Available at : http://www.jetir.org/papers/JETIR2310424.pdf