Power Management Using One Cycle Control Strategy for Triple Input Single Output Fly Back DC–DC Converter

Abstract

Traditional multi-input converters have simpler configuration, but they have some disadvantages like multiple primary winding, high voltage stresses across the switches and also transfer of energy to the load occurs only from anyone of the input sources. This article proposes an isolated converter with reduced number of primary winding, and the load can be supplied by the sources either individually or simultaneously. The main objective of this work is to inject power into the grid using a three input single output Fly back DC–DC converter with closed loop control using one cycle controller (OCC) and PI controller. For power management, the inductor current is measured and the duty ratios of respective sources are controlled in such a manner that the average current flowing through the switch is proportional to power delivered by respective sources. In order to maintain the output voltage to be constant, the duty ratio of any one source is to be controlled by using outer voltage controller and inner current controller. Here, the duty ratios of first two sources are controlled by current mode control using OCC and the duty ratio of third source is controlled by using voltage controller with inner OCC current control. Since OCC is a nonlinear technique, only one PI controller is needed by the system. The system has only two sensors, one for measuring the output voltage and one for measuring the inductor current.

Keywords:

• three input single output fly back DC to DC converter
• one cycle control
• current control
• voltage control
• power management of multi-input DC to DC converters
• multi-input DC to DC converters
• transformer design

Additional information

Notes on contributors

P. Hema Rani

P. Hema Rani received her B.Tech. from College of Engineering, Trivandrum in 1996, and M.Tech. from Indian Institute of Technology, Kanpur in 2005 and presently pursuing towards Ph.D. degree from National Institute of Technology, Calicut, India. She is presently working as assistant professor in Electrical Engineering Department, National Institute of Technology, Calicut. Her research interests in power electronics include power electronic drives, power converters, and switched mode power supplies.

K. Manikanta

K. Manikanta received his B.Tech. (Electrical and Electronics Engineering) degree from Sri Prakash College of Engineering (JNTU-K) in the year 2014 and M.Tech. (Power Electronics) in 2019 from NIT-Calicut. His field of interests are DC–DC converters, control systems, and machines.

Saly George

Saly George received her B.Tech. degree from College of Engineering, Trivandrum in 1982. M.Tech. from Regional Engineering College, Calicut in 1990 and Ph.D. from Regional Engineering College in 2000. Presently, she is serving as Professor, Electrical Engineering Department, National Institute of Technology, Calicut formerly REC, Calicut. Her research interest includes power electronics, FACTS, power electronic drives, and power converters.

S. Ashok

S. Ashok received his B.E. from Regional Engineering College (REC) Calicut, Kerala in 1982 M.Tech. from Indian Institute of Technology, New Delhi in 1995 and Ph.D. from Indian Institute of Technology, Mumbai, India in 2002. He worked in L&T in switchgear division, ALIND limited, Reserve Bank of India and finally joined in Regional Engineering College, Calicut, Kerala. At present he is working as Professor, Department of Electrical Engineering, National Institute of Technology Calicut, Kerala, India. His research interests include electric power components and systems.