A Novel High Voltage Gain SEPIC Converter Based on Hybrid Split-Inductor for Renewable Application

ABSTRACT

The modified single-ended primary inductor converter (SEPIC) reported in the literature has limitations namely, low static gain and high input current ripples. This resulted in poor efficiency with high switching losses and switching stress. Hence, in order to overcome the above-said limitations, this paper proposes a high static gain SEPIC converter with reduced input current ripple. The proposed converter resembles a split-inductor design consisting of three diodes and two inductors. The static gain of the converter is significantly improved while input current ripple gets reduced by using a split-inductor. Additionally, the low value of input current ripple causes minimal switching stress and switching losses. Hence, the efficiency of the proposed converter improves significantly. The working principle and theoretical analysis of the proposed converter is studied in detail for continuous, discontinuous and boundary conduction modes. Moreover, a small signal/transient analysis is also discussed to validate the feasibility as well as the stability of the proposed system using the transfer function approach. In order to validate the effectiveness of the proposed converter, a MATLAB/Simulink model has been designed. Further, a laboratory prototype has been developed and the experimental results obtained are in agreement with the simulated results.

KEYWORDS:

• Current ripple
• High voltage gain
• Hybrid split-inductor
• SEPIC converter

Additional information

Notes on contributors

Dileep Kumar

Dileep Kumar acquired his graduate degree in electrical engineering from Kautilya Institute of Technology Jaipur, Rajasthan, India in 2014. He received his MTech in power electronics and drives from Malaviya National Institute of Technology, Jaipur, India in 2017. Currently, he Is working toward his PhD in power electronics in the Department of Electrical Engineering, Malviya National Institute of Technology (MNIT) Jaipur. His research interest includes power electronics, integration of renewable sources and electrical machines.

Ram Avtar Gupta

Ram Avtar Gupta received his BE (electrical) and ME degrees from the University of Jodhpur, India, in 1980 and 1984, respectively. He did his PhD degree in 1996 from University of Roorkee (Presently, IIT Roorkee, Roorkee), India In 1982, he joined as an assistant professor in the Department of Electrical Engineering, JNV University, Jodhpur. In November 1990, he joined as a reader and became professor in 1999 in theDepartment of Electrical Engineering, MREC, Jaipur (presently MNIT, Jaipur). He has around 30 years of teaching experience, completed several research projects, and guided many PhDs. His fields of interest include power electronics, electrical machines and drives, power quality, and renewable energy integration. R A Gupta is a fellow of Institute of Engineers (INDIA), member of IEEE, a life member of IETE and ISTE. Recently (July 2019), he is appointed as vice-chancellor of Rajasthan Technical University Kota, Rajasthan. R A Gupta has published many research papers in reputed journals, international and national conferences. R A Gupta is a reviewer of several international journals and international conferences. Email: [email protected]

Harpal Tiwari

Harpal Tiwari received his BE (Electrical) and ME degrees from the Aligarh Muslim University, Uttar Pradesh (U P), India, in 1983 and 1986, respectively. He did his PhD degree in 2000 from University of Rajasthan Jaipur (MREC), (presently Malaviya National Institute of Technology Jaipur), India. In 1986, he joined as a lecturer in the Department of Electrical Engineering, MREC Jaipur. In September 2007, he promoted as an associate professor and became professor in 2018 in the Department of Electrical Engineering, MREC, Jaipur (presently MNIT, Jaipur). He has around 30 years of teaching experience, completed several research projects, and guided many PhDs. His fields of interest include power electronics, electrical machines and drives, power quality, and renewable energy integration. H P Tiwari is a fellow of Institute of Engineers (INDIA), senior member of IEEE, a life member of international association of engineers (LMIAENG), Hong Kong, life member of ISTE. He published several books on relevant subjects. H P Tiwari has published many research papers in reputed journals, international and national conferences. H P Tiwari is a reviewer of several international journals and international conferences. Email: [email protected]