Asymmetric H-Bridge Single-Phase Seven-Level Inverter Topology with Proportional Resonant Controller

ABSTRACT

This paper presents an asymmetrical H-bridge single-phase seven-level inverter topology with modified gating scheme for reducing the number of high-frequency switches. Due to shortcomings like steady-state error and problems in removing low-order harmonics associated with proportional integral controller, proportional resonant controller is used for grid-connected converter current control. A practical application of proportional resonant current controller is developed using a low-cost dsPIC33EP256MC202 microcontroller to keep the current injected in to the grid. The validity of proposed inverter and control scheme is verified through simulation and implemented for low-voltage laboratory prototype.

KEYWORDS:

• Asymmetric source configuration
• Current controller
• Multilevel inverters
• Power quality
• Pulse-width modulation

ACKNOWLEDGEMENTS

The authors are grateful to the authorities of VNIT, Nagpur, and SRCOEM, Nagpur, for providing facilities to carry out the research work.

Additional information

Notes on contributors

P. A. Salodkar

Prachi Salodkar (S’09) was born in Nagpur, India, in 1981. She received the BE degree in Electrical Engineering in 2002 from Shri Ramdeobaba College of Engineering, RTM Nagpur University, Nagpur, India. She received her MTech degree in Integrated Power System, RTM Nagpur University, Nagpur, India, in 2009. She is currently working towards the PhD degree in Department of Electrical Engineering, Visvesvaraya National Institute of Technology, Nagpur, India. She has total teaching experience of 10 years. Her research interests include application of power electronics in power system and renewable energy systems.

E-mail: [email protected]

P. S. Kulkarni

P. S. Kulkarni graduated in Electrical Engineering from the Walchand College of Engineering, Sangli, Maharashtra, in 1987, He received his ME degree in Electrical Power System from Government College of Engineering, Amravati, in 1994 and his PhD degree for his thesis on “Emission Constrained Economic Dispatch”, from RTM Nagpur University, Nagpur, in 2002. He has total teaching experienced of 30 years at diploma, degree, and post-graduate level. He is presently working as an associate professor in Electrical Engineering Department of VNIT, Nagpur. His fields of interest are AI applications in power operation and control, renewable energy system including wind and PV systems.

E-mail: [email protected]

Manoj A. Waghmare

Manoj A. Waghmare (S’16) graduated in Electrical Engineering from B. D. College of Engineering, Wardha, Maharashtra. He received his MTech degree from Shri Ramdeobaba College of Engineering, Nagpur, in 2016. Currently, he is working with Yeshwantrao Chavan College of Engineering, Nagpur, Maharashtra. His research interests include application of power electronics and drive.

E-mail: [email protected]

P. C. Chaturvedi

Pradyumn Chaturvedi received the BE, ME, and PhD degrees in 1996, 2001, and 2010, respectively. He is currently working as an assistant professor in the Department of Electrical Engineering, Visvesvaraya National Institute of Technology, Nagpur, India. He is having more than 15 years of teaching experience. He has published more than 70 research papers in international refereed journals and refereed international/national conferences. He is Sr. Member IEEE USA, Life Member ISTE India, and Member IET UK. He is holding the position of Chair, Joint Chapter of Power Electronics, Industrial Electronics & Industry Applications of IEEE Nagpur Sub-Section. He is also actively involved in IEEE conferences as Track Chair, Technical Program Committee and Advisory Committee. He is regular Reviewer of research articles for IEEE Transaction on Power Electronics, IEEE Transaction on Industrial Informatics, Electrical Engineering (Springer's), International Journal of Electronics (Taylor & Francis), International Journal of Power Electronics (Inderscience Publisher), Electric Power Components & Systems, IEEE Student Conference SCEECS. His research interests include power electronics, improved power factor converter, power quality improvement, multilevel converters, electric drives, and renewable energy harvesting.

E-mail: [email protected]

Sandeep N

Sandeep N. was born in Bengaluru, India, in 1991. He received the diploma and the BE degree in electrical and electronics engineering from the Sri Jayachamarajendra (Government) Polytechnic and B. M. S. College of Engineering, Bengaluru, and the MTech degree in power electronics and drives from the Visvesvaraya National Institute of Technology Nagpur, Nagpur, India, in 2009, 2012, and 2014, respectively. He is currently working towards the PhD degree with the Department of Electrical and Electronics Engineering, National Institute of Technology Karnataka, Surathkal, Mangaluru, India. His research interests include multilevel power converters and grid-connected photovoltaics. He received the Best Poster Presentation Award for his paper at the 18th IEEE National Power Systems Conference 2014, Indian Institute of Technology Guwahati, Guwahati, India.

E-mail: [email protected]