Table of Contents
Advances in Power Electronics
Volume 2014, Article ID 125918, 15 pages
http://dx.doi.org/10.1155/2014/125918
Research Article

Fast Hybrid MPPT Technique for Photovoltaic Applications: Numerical and Experimental Validation

1Department of Industrial and Information Engineering, Second University of Naples, Via Roma 29, 81031 Aversa, Italy
2ENEA Portici Research Centre, P. E. Fermi 1, Naples, 80055 Portici, Italy

Received 14 January 2014; Revised 31 March 2014; Accepted 22 April 2014; Published 3 June 2014

Academic Editor: Pavol Bauer

Copyright © 2014 Gianluca Aurilio 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.

Abstract

In PV applications, under mismatching conditions, it is necessary to adopt a maximum power point tracking (MPPT) technique which is able to regulate not only the voltages of the PV modules of the array but also the DC input voltage of the inverter. Such a technique can be considered a hybrid MPPT (HMPPT) technique since it is neither only distributed on the PV modules of the PV array or only centralized at the input of the inverter. In this paper a new HMPPT technique is presented and discussed. Its main advantages are the high MPPT efficiency and the high speed of tracking which are obtained by means of a fast estimate of the optimal values of PV modules voltages and of the input inverter voltage. The new HMPPT technique is compared with simple HMPPT techniques based on the scan of the power versus voltage inverter input characteristic. The theoretical analysis and the results of numerical simulations are widely discussed. Moreover, a laboratory test system, equipped with PV emulators, has been realized and used in order to experimentally validate the proposed technique.