Advanced control of photovoltaic converters

It is essential to always track maximum power from photovoltaic (PV) sources. Failure to track the global maximum power point under partial shading conditions is one of the major reasons that lead to significant power losses. Several maximum power point tracking methods have been proposed to deal with this problem. However, none of them were able to effectively identify the occurrence of partial shading. With the facility of Matlab modelling and simulation as well as the aid of a constructed solar emulator, the power-voltage characteristics of a PV panel under uniform and non-uniform irradiance conditions have been studied and some useful conclusions have been identified from observation. Based on these conclusions, a novel maximum power point tracking algorithm has been proposed, which is capable of identifying the occurrence of partial shading hence determining the need for a global scan over the operation range of PV panels for the true maximum power point. In the meantime, the effect of PV dynamics, due to the capacitance of PV cells, on maximum power point trackers has been investigated and some initial results and suggestions have been presented in this work.

[1]  Wolfgang Palz.  Solar Electricity: An Economic Approach to Solar Energy , 1977 .

[2]  C. Prapanavarat,et al.  Investigation of the performance of a photovoltaic AC module , 2002 .

[3]  Santiago Silvestre,et al.  Modelling photovoltaic system using PSpice , 2002 .

[4]  G. Scheible,et al.  System engineering aspects and power electronics in an autonomous photovoltaic-hydrogen system , 1998, 1998 International Conference on Power Electronic Drives and Energy Systems for Industrial Growth, 1998. Proceedings..

[5]  Ronnie Belmans,et al.  Partial shadowing of photovoltaic arrays with different system configurations: literature review and field test results , 2003 .

[6]  M. Veerachary,et al.  Reliability Issues in Photovoltaic Power Processing Systems , 2008, IEEE Transactions on Industrial Electronics.

[7]  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 .

[8]  G.R. Walker,et al.  Cascaded DC-DC converter connection of photovoltaic modules , 2004, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[9]  V. Agarwal,et al.  A new algorithm for rapid tracking of approximate maximum power point in photovoltaic systems , 2004, IEEE Power Electronics Letters.

[10]  Vivek Agarwal,et al.  Maximum Power Point Tracking Scheme for PV Systems Operating Under Partially Shaded Conditions , 2008, IEEE Transactions on Industrial Electronics.

[11]  Weidong Xiao,et al.  Topology Study of Photovoltaic Interface for Maximum Power Point Tracking , 2007, IEEE Transactions on Industrial Electronics.

[12]  Masafumi Miyatake,et al.  A novel maximum power point tracking for photovoltaic applications under partially shaded insolation conditions , 2008 .

[13]  Doron Shmilovitz,et al.  On the control of photovoltaic maximum power point tracker via output parameters , 2005 .

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

[15]  N. Veissid,et al.  Experimental investigation of the double exponential model of a solar cell under illuminated conditions: Considering the instrumental uncertainties in the current, voltage and temperature values , 1995 .

[16]  Gregory S. Glenn,et al.  High concentration testing and performance of multijunction solar cells , 2002, Conference Record of the Twenty-Ninth IEEE Photovoltaic Specialists Conference, 2002..

[17]  Wilhelm Warta,et al.  Towards 20% efficient silicon solar cells manufactured at 60 MWp per annum , 2003, 3rd World Conference onPhotovoltaic Energy Conversion, 2003. Proceedings of.

[18]  R. Teodorescu,et al.  Optimized Maximum Power Point Tracker for fast changing environmental conditions , 2008, 2008 IEEE International Symposium on Industrial Electronics.

[19]  Gabi Friesen,et al.  Capacitance effects in high-efficiency cells , 1997 .

[20]  V. Agarwal,et al.  MATLAB-Based Modeling to Study the Effects of Partial Shading on PV Array Characteristics , 2008, IEEE Transactions on Energy Conversion.

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

[22]  H. Bock,et al.  New organic discotic materials for photovoltaic conversion , 2005 .

[23]  Ichiro Takano,et al.  A Study of a Two Stage Maximum Power Point Tracking Control of a Photovoltaic System under Partially Shaded Insolation Conditions , 2004 .

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

[25]  Tomas Markvart.  Solar electricity. 2nd edition , 2000 .

[26]  Eduardo Lorenzo,et al.  Solar Electricity: Engineering of Photovoltaic Systems , 1994 .

[27]  Santiago Silvestre,et al.  Modelling Photovoltaic Systems Using PSpice®: Castaner/Modelling Photovoltaic Systems Using PSpice , 2006 .

[28]  J. Nelson.  The physics of solar cells , 2003 .

[29]  Toshihiko Noguchi,et al.  Short-current pulse-based maximum-power-point tracking method for multiple photovoltaic-and-converter module system , 2002, IEEE Trans. Ind. Electron..

[30]  A. Goetzberger,et al.  Photovoltaic solar energy generation , 2005 .

[31]  Tsutomu Hoshino,et al.  Maximum photovoltaic power tracking: an algorithm for rapidly changing atmospheric conditions , 1995 .

[32]  B. J. Brinkworth,et al.  Evaluation of Two Theoretical Models in Simulating the Performance of Amorphous - Silicon Solar Cells , 1991 .