The modified SEPIC converter introduces a change in the positioning of the transistor switch. The objective of this paper is to prove that this reduces oscillations and further provides better stability to the system as the load will be connected to the source at all times. However in the process the converter loses its boosting capability. Here the modified SEPIC converter is shown to be integrated with a solar powered system. The closed loop uses the Maximum Power Point Tracking (MPPT) algorithm to get the best possible efficiency at the given intensity. The simulation results of modified SEPIC converter are obtained with PI controller for the output voltage.
Attempts to achieve stability have been made, some suggesting that stable current controlled SEPIC can be achieved by selecting passive components carefully. However this modification suggests a different way to achieve stability.
Modeling and Control of PV Charger System With SEPIC Converter S. J. Chiang, Hsin-Jang Shieh, Member, IEEE, and Ming-Chieh Chen. 2 Design Considerations of a Multiple-Input Isolated Single Ended Primary Inductor Converter (SEPIC) for Distributed Generation Sources- Sheng-Yang Yu, Ruichen Zhan, Alexis Kwasinski The University of Texas. 3 Development of Maximum Power Point Tracker for PV Panels Using SEPIC Converter Mr. R. B. Darla Engineer, R&D, Amara Raja Power Systems Ltd, Tirupati, India. 4 Modeling of a SEPIC Converter Operating in Discontinuous Conduction Mode Vuthchhay Eng and Chanin Bunlaksananusorn Faculty of Engineering, King Mongkut's Institute of Technology.