Table of Contents
ISRN Renewable Energy
Volume 2012, Article ID 317982, 9 pages
Research Article

MATLAB-Based Investigation of Multiphase Interleaved Buck-Boost Converter for PV System

1Department of Electrical Engineering, Sarvajanik College of Engineering & Technology, Dr. R. K. Desai Marg, Athwalines, Surat 395001, India
2Department of Electronics Engineering, Rajasthan Technical University, Kota 324022, India
3Department of Electrical Engineering, S. V. National Institute of Technology, Ichchhanath, Surat 395 007, India

Received 30 September 2011; Accepted 9 November 2011

Academic Editor: S. Dai

Copyright © 2012 Hardik P. Desai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A photovoltaic (PV) generator exhibits nonlinear voltage-current characteristics and its maximum power point varies with solar radiation. Analytical investigations of the new family of switching converters based on a parallel connection of 𝑁 (=4) identical buck-boost converters employed in PV system are presented. The interleaving strategy ensures that all the converters operate at the same switching frequency. Mathematical models developed using the state-space average technique are presented in this paper. Various steady-state performance expressions are also derived. The present converter system has the advantages of reduced size of the converter, and ripple in the total inductor current. The effectiveness of the four-phase interleaved dc-dc converter combined with PV system is demonstrated through simulations carried out in MATLAB environment.