https://orcid.org/0000-0003-0054-0149
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Abstract
A novel single-phase 29-level asymmetrical switched-diode multilevel inverter (MLI) topology is presented in this paper with a reduced number of components. The developed topology can able to generate a maximum of 29-levels of output voltage using unequal DC sources. The basic 15-level MLI is developed and then further developed to 29-levels. The proposed topology reduces the circuit components, size and cost of the system. Apart from the several benefits of MLIs, reliability and accuracy plays a vital role because of the existence of more components count to reduce THD value. This can be considered as a major challenge employed to boost reliability without altering the best THD value. Various parameters are realized for both basic 15-level and the proposed 29-level switched-diode MLIs like total standing voltage (TSV), power loss, efficiency and cost function (CF). As the proposed MLI is undergone in dynamic load variations, the experimental results show the variations from R-load to L-load and L-load to R-load and it is found that the inverter is found to be stable throughout its operation. Experimental THD is represented, which is similar to the simulation THD which is under IEEE standards. TSV and cost factor of the proposed MLI is determined and is compared with several existing topologies and is observed to be cost-effective. A precise comparison is made on various parameters using graphical depiction. . The simulation for the proposed topology is done in MATLAB/Simulink and the experimental verification is done using the hardware prototype model under several conditions.
Acknowledgment
The Vellore Institute of Technology, Vellore, India, provided a SEED grant, which the authors gratefully recognize.
Disclosure statement
No potential conflict of interest was reported by the author(s).
Additional information
Funding
Notes on contributors
C. Dhanamjayulu
Dhanamjayulu C received the BTech degree in electronics and communication engineering from JNTU University, Hyderabad, India, the MTech degree in control and instrumentation systems from Indian Institute of Technology Madras, Chennai, India, and the PhD degree in power electronics from the Vellore Institute of Technology, Vellore, India. He is a postdoctoral researcher with the Department of Energy Technology, Aalborg University, Esbjerg, Denmark. He is currently a faculty member and a member of the Control and Automation Department, School of Electrical Engineering, Vellore Institute of Technology. He is a senior assistant professor with the School of Electrical Engineering, Vellore Institute of Technology since 2010. He was invited as a visiting researcher with the Department of Energy Technology, Aalborg University, Esbjerg, Denmark. His research interests include multilevel inverters, power converters, active power filters, power quality, grid connected systems, smart grid, electric vehicle, electric spring, and tuning of memory elements & controller parameters using soft-switching techniques for power converters, average modeling, steady-state modeling, small-signal modeling stability analysis of the converters and inverters. Corresponding author. Email: [email protected]
P. Sanjeevikumar
Sanjeevikumar Padmanaban (Member'12–Senior Member'15, IEEE) received the bachelor's degree in electrical engineering from the University of Madras, Chennai, India, in 2002, the master's degree (Hons.) in electrical engineering from Pondicherry University, Puducherry, India, in 2006, and the PhD degree in electrical engineering from the University of Bologna, Bologna, Italy, in 2012. He was an associate professor with VIT University from 2012 to 2013. In 2013, he joined the National Institute of Technology, India, as a faculty member. In 2014, he was invited as a visiting researcher at the Department of Electrical Engineering, Qatar University, Doha, Qatar. He continued his research activities with the Dublin Institute of Technology, Dublin, Ireland, in 2014. Further, he served an associate professor with the Department of Electrical and Electronics Engineering, University of Johannesburg, Johannesburg, South Africa, from 2016 to 2018. Since 2018, he has been a faculty member with the Department of Energy Technology, Aalborg University, Esbjerg, Denmark. He has authored more than 300 scientific papers. He was the recipient of the Best Paper cum Most Excellence Research Paper Award from IET-SEISCON'13, IET-CEAT'16, IEEEEECSI'19, IEEECENCON'19 and five best paper awards from ETAEERE'16 sponsored lecture notes in electrical engineering, Springer book. He is a Fellow of the Institution of Engineers, India, the Institution of Electronics and Telecommunication Engineers, India, and the Institution of Engineering and Technology, U.K. He is an editor/associate editor/editorial board for IEEE system journal, IEEE Transaction on Industry Applications, IEEE Access, IET Power Electronics, IET Electronics Letters, and Wiley-International Transactions on Electrical Energy Systems, Subject Editorial Board Member - Energy Sources - Energies Journal, MDPI, and the Subject Editor for the IET Renewable Power Generation, IET Generation, Transmission and Distribution, and FACTS journal (Canada). Email: [email protected]
Devalraju Prasad
Devalraju Prasad received the BTech degree in electrical engineering from JNTUA, Andhra Pradesh, India, in 2009, the MTech degree from the same institute in 2015. He is pursuing PhD degree in the field of power electronics at VIT, India. His research activities are in the area of multilevel inverters, power converters, and active power filters and power quality. Email: [email protected]
Shaik Reddi Khasim
Shaik Reddi Khasim received the BTech degree in electrical engineering with distinction from JNTUA, Andhra Pradesh, India, in 2012, the MTech degree with distinction from the same institute, in 2015. He is perusing PhD degree in the field of power electronics at Vellore Institute of Technology, Vellore, India. His research activities are in the area of multilevel inverters, power converters and electric vehicles. Email: [email protected]
Frede Blaabjerg
Frede Blaabjerg (S'86–M'88–SM'97–F'03) was with ABB-Scandia, Randers, Denmark, from 1987 to 1988. From 1988 to 1992, he got a PhD degree in electrical engineering at Aalborg University in 1995. He became an assistant professor in 1992, an associate professor in 1996, and a professor of power electronics and drives in 1998. In 2017, he became a Villum Investigator. He is honoris causa at University Politehnica Timisoara (UPT), Romania, and Tallinn Technical University (TTU) in Estonia. His current research interests include power electronics and its applications such as in wind turbines, PV systems, reliability, harmonics, and adjustable speed drives. He has published over 600 papers in the fields of power electronics and its applications. He is the co-author of four monographs and editor of ten books in power electronics and its applications. He received 32 IEEE Prize Paper Awards, the IEEE PELS Distinguished Service Award in 2009, the EPE-PEMC Council Award in 2010, the IEEE William E. Newell Power Electronics Award 2014, the Villum Kann Rasmussen Research Award 2014, the Global Energy Prize in 2019, and the 2020 IEEE Edison Medal. He was the Editor-in-Chief of the IEEE Transactions on Power Electronics from 2006 to 2012. He has been a distinguished lecturer for the IEEE Power Electronics Society from 2005 to 2007 and for the IEEE Industry Applications Society from 2010 to 2011 as well as 2017 to 2018. In 2019-2020 he was a president of the IEEE Power Electronics Society. He is vice-president of the Danish Academy of Technical Sciences too. He is nominated in 2014–2019 by Thomson Reuters to be between the most 250 cited researchers in Engineering in the world. In 2017 he became Honoris Causa at University Politehnica Timisoara (UPT), Romania. Email: [email protected]