Dynamic behaviour of PV generator trackers under irradiation and temperature changes

Maximum power point trackers (MPPTs) have a decisive role to extract power from the photovoltaic (PV) generators as they have to assume the maximum power output (MPP) whatever are the continuous changes of temperature and irradiation conditions. Therefore, they take a prior place in the global PV system efficiency. These trackers are driven by MPPT algorithms and lot of these MPPT algorithms are proposed in literature. The two most common implemented algorithms for power optimisation are the Perturb and Observe (P&O) and the Incremental of Conductance (IncCond) algorithms, which present a high simplicity of implementation within electronics programmable circuits. With an approach based on realistic parameters such as those found when the generator is integrated in a real photovoltaic installation, the two MPPT techniques are dynamically compared using testing procedures developed with Matlab/Simulink. The study leads us to conclude that both algorithms can be performed for PV exposures in unfavourable but realistic external conditions.

[1]  Gayatri Agnihotri,et al.  Computer Simulation Based Study of Photovoltaic Cells/Modules and their Experimental Verification , 2009 .

[2]  Vivek Agarwal,et al.  Comparison of the performance of maximum power point tracking schemes applied to single-stage grid-connected photovoltaic systems , 2007 .

[3]  Johan H R Enslin,et al.  Integrated photovoltaic maximum power point tracking converter , 1997, IEEE Trans. Ind. Electron..

[4]  Chih-Chiang Hua,et al.  Study of maximum power tracking techniques and control of DC/DC converters for photovoltaic power system , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[5]  C. Hua,et al.  An on-line MPPT algorithm for rapidly changing illuminations of solar arrays , 2003 .

[6]  Marcelo Gradella Villalva,et al.  Modeling and circuit-based simulation of photovoltaic arrays , 2009, 2009 Brazilian Power Electronics Conference.

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

[8]  R.C. Campbell.  A Circuit-based Photovoltaic Array Model for Power System Studies , 2007, 2007 39th North American Power Symposium.

[9]  T. Oshiro,et al.  Analysis of MPPT characteristics in photovoltaic power system , 1997 .

[10]  G. Yu,et al.  A novel two-mode MPPT control algorithm based on comparative study of existing algorithms , 2002, Conference Record of the Twenty-Ninth IEEE Photovoltaic Specialists Conference, 2002..

[11]  Yong Kang,et al.  A Variable Step Size INC MPPT Method for PV Systems , 2008, IEEE Transactions on Industrial Electronics.

[12]  Fernando L. M. Antunes,et al.  A maximum power point tracker for PV systems using a high performance boost converter , 2006 .

[13]  M. E. Ropp,et al.  Comparative study of maximum power point tracking algorithms , 2003 .

[14]  F. Blaabjerg,et al.  Improved MPPT Algorithms for Rapidly Changing Environmental Conditions , 2006, 2006 12th International Power Electronics and Motion Control Conference.

[15]  M. C. Alonso-García,et al.  A model for the series–parallel association of photovoltaic devices , 2006 .

[16]  Piazza Leonardo da Vinci,et al.  Energy comparison of MPPT techniques for PV Systems , 2008 .

[17]  P.L. Chapman,et al.  Comparison of Photovoltaic Array Maximum Power Point Tracking Techniques , 2007, IEEE Transactions on Energy Conversion.

[18]  Jean-Pierre Charles,et al.  A critical study of the effectiveness of the single and double exponential models for I–V characterization of solar cells , 1985 .

[19]  J. A. Gow,et al.  Development of a photovoltaic array model for use in power-electronics simulation studies , 1999 .

[20]  J. M. Enrique,et al.  A new approach to obtain I-V and P-V curves of photovoltaic modules by using DC-DC converters , 2005, Conference Record of the Thirty-first IEEE Photovoltaic Specialists Conference, 2005..

[21]  A. Moussi,et al.  Optimisation of Chopping ratio of Back-Boost Converter by MPPT technique with a variable reference voltage applied to the Photovoltaic Water Pumping System , 2006, 2006 IEEE International Symposium on Industrial Electronics.

[22]  Yu Zhang,et al.  Comparison of P&O and hill climbing MPPT methods for grid-connected PV converter , 2008, 2008 3rd IEEE Conference on Industrial Electronics and Applications.

[23]  Joung-Hu Park,et al.  New MPPT Control Strategy for Two-Stage Grid-Connected Photovoltaic Power Conditioning System , 2007 .