Subramaniam C-K

Department of Physics

School of Advanced Sciences

Vellore Campus

Sekar R.M

Jayakumar D.N

Mylsamy K

Padmanaban S.

Vellore Institute of Technology (VIT) is a private university located in&nbsp;Tamil Nadu, India. Founded in 1984, as Vellore Engineering College, the institution offers 20 undergraduate, 34 postgraduate, four integrated and four research programs. It has campuses in Vellore, Amravati, Bhopal and Chennai.

VIT is one of the top ranked private universities in India according to NIRF, THE and QS Rankings.&nbsp;Govt. of India has recognized&nbsp;VIT, Vellore as an&nbsp;Institution of Eminence. This has allowed VIT to take independent quality initiatives and move up in world ranking.

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VIT University

IET Power Electronics

The switching angles play a vital role in varying the total harmonics distortion in the operation of a multilevel inverter. This paper proposes a modified nearest level modulation scheme to be employed on multilevel inverter for the electrical engineering students in power electronics course. Compared to the conventional nearest level modulation scheme, the proposed modulation scheme is found to facilitate a reduction in the total harmonics distortion at the output of the inverter. An algorithm has been designed for this purpose. The algorithm not only provides an easy approach in calculating the total harmonics distortion but also to reduce the total harmonics distortion. Since the algorithm is applicable to multilevel inverter of any level output, it gives the students a deeper understanding of operation of various multilevel inverter topologies. The proposed scheme is also compared with three other conventional schemes in order to thoroughly understand the importance of total harmonics distortion. Validation of the modified nearest level modulation and nearest level modulation has been done on a cascaded H-bridge inverter for 11 different types of configuration. Simulation has been implemented using the MATLAB/Simulink 2015b software package. A hardware prototype with a specification similar to that of simulation is also presented. With the proper understanding of the algorithm presented, it is very easy to teach multilevel inverter topics under the field of power electronics. © The Author(s) 2019.

International Journal of Electrical Engineering & Education

A modified nearest level modulation scheme for symmetric and asymmetric configurations of cascaded H-bridge inverter

Fulltext

IEEE Access

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Journal	IET Power Electronics
Publisher	Institution of Engineering and Technology (IET)
ISSN	1755-4535
Open Access	0