A novel method to optimize photovoltaic generator operation

Photovoltaic (PV) energy is an alternative energy source for the future due to the world's limited energy resources. In this paper, a new technique to improve the performance of a PV array is presented. The study is based on the determination of the optimal configuration of a PV generator for a fixed number of modules. The aim of the study is to extract the maximum power from a PV generator connected in a direct coupling to a load. Different considerations (commutation current alone, commutation voltage alone, commutation current and voltage) are described. The presented method is based on microcontroller utilization. Very simple calculations allowed to decide, in real time, which configuration is appropriate for any load and any work conditions. Theoretical and experimental results are included. The effectiveness of the applied method is assessed by simulations and experiments. The method using commutation current and commutation voltage leads to good results unlike the other techniques. Copyright © 2008 John Wiley & Sons, Ltd.

[1]  J. Applebaum.  The operation of loads powered by separate sources or by a common source of solar cells , 1989 .

[2]  Andres Barrado,et al.  Review of the maximum power point tracking algorithms for stand-alone photovoltaic systems , 2006 .

[3]  Ziyad M. Salameh,et al.  Two-stage electrical array reconfiguration controller for PV-powered water pump , 1990 .

[4]  Jacob Brouwer,et al.  Dynamic modeling of hybrid energy storage systems coupled to photovoltaic generation in residential applications , 2007 .

[5]  Abdulla Ismail,et al.  A photovoltaic utilization system with bang-bang self-adjusting maximum energy tracking controller , 1998 .

[6]  J. A. Chattha,et al.  A simple photo-voltaic tracking system , 2005 .

[7]  Z. M. Salameh,et al.  Optimum switching points for array reconfiguration controller , 1990, IEEE Conference on Photovoltaic Specialists.

[8]  J. Appelbaum.  The Operation of Loads Powered by Separate Sources or by a Common Source of Solar Cells , 1989, IEEE Power Engineering Review.

[9]  I.E. Davidson,et al.  Model of a photovoltaic fuel-cell generator , 2004, 2004 IEEE Africon. 7th Africon Conference in Africa (IEEE Cat. No.04CH37590).

[10]  El‐Hosseiny T. El‐Shirbeeny,et al.  Design of electronic optimizer for solar electric drive system , 1982 .

[11]  M. Arutchelvi,et al.  Composite controller for a hybrid power plant based on PV array fed wind‐driven induction generator with battery storage , 2007 .

[12]  Mariano Sidrach-de-Cardona,et al.  Theoretical assessment of the maximum power point tracking efficiency of photovoltaic facilities with different converter topologies , 2007 .

[13]  Mehmet Akbaba.  Optimum matching parameters of an MPPT unit used for a PVG‐powered water pumping system for maximum power transfer , 2006 .

[15]  Khouzam.  Optimum load matching in direct-coupled photovoltaic power systems , 1989 .

[16]  J. Applebaum.  The Quality of Load Matching in a Direct-Coupling Photovoltaic System , 1987, IEEE Transactions on Energy Conversion.