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International Journal of Photoenergy
Volume 2014 (2014), Article ID 128327, 10 pages
Research Article

Improved Fractional Order VSS Inc-Cond MPPT Algorithm for Photovoltaic Scheme

1Department of Electrical and Electronics Engineering, Anna University Regional Zone, Coimbatore, India
2Department of Electrical and Electronics Engineering, Knowledge Institute of Technology, KIOT Campus, NH-47 Salem to Coimbatore Road, Kakapalayam, Salem 637 504, India

Received 5 November 2013; Revised 7 January 2014; Accepted 7 January 2014; Published 2 March 2014

Academic Editor: Ismail H. Altas

Copyright © 2014 R. Arulmurugan and N. Suthanthiravanitha. 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.


Nowadays a hot topic among the research community is the harnessing energy from the free sunlight which is abundant and pollution-free. The availability of cheap solar photovoltaic (PV) modules has to harvest solar energy with better efficiency. The nature of solar modules is nonlinear and therefore the proper impedance matching is essential. The proper impedance matching ensures the extraction of the maximum power from solar PV module. Maximum power point tracking (MPPT) algorithm is acting as a significant part in solar power generating system because it varies in the output power from a PV generating set for various climatic conditions. This paper suggested a new improved work for MPPT of PV energy system by using the optimized novel improved fractional order variable step size (FOVSS) incremental conductance (Inc-Cond) algorithm. The new proposed controller combines the merits of both improved fractional order (FO) and variable step size (VSS) Inc-Cond which is well suitable for design control and execution. The suggested controller results in attaining the desired transient reaction under changing operating points. MATLAB simulation effort shows MPPT controller and a DC to DC Luo converter feeding a battery load is achieved. The laboratory experimental results demonstrate that the new proposed MPPT controller in the photovoltaic generating system is valid.