Quantification of photovoltaic module degradation using model based indicators

One of the most important characteristics of the photovoltaic (PV) modules is their long lifetime (around 25 years). However, recent investigations have shown that PV modules may suffer significant degradation before that time; that is why the development of diagnostic techniques is important for the customers of PV systems. In this paper two indicators to quantify the degradation of a PV module are presented. Such indicators use the single-diode model to represent a PV module without degradation and combine such information with the experimental measurements to estimate the increase in the series resistance and/or the decrease in the parallel resistance with respect to reference values. The estimation of those variations allows the quantification of the module degradation. Simulation results comparing the proposed indicators with the fill factor (a traditional indicator to quantify the electrical quality of a PV module), and other indicators to estimate the series resistance are presented to illustrate the advantages of the proposed indicators.

[1]  F. Chenlo,et al.  Early degradation of silicon PV modules and guaranty conditions , 2011 .

[2]  G. Petrone,et al.  A model of photovoltaic fields in mismatching conditions featuring an improved calculation speed , 2013 .

[3]  Marcelo Gradella Villalva,et al.  Comprehensive Approach to Modeling and Simulation of Photovoltaic Arrays , 2009, IEEE Transactions on Power Electronics.

[4]  K. Otani,et al.  Experimental Studies of Failure Detection Methods in PV Module Strings , 2006, 2006 IEEE 4th World Conference on Photovoltaic Energy Conference.

[5]  Harald Müllejans,et al.  A validation study of photovoltaic module series resistance determination under various operating conditions according to IEC 60891 , 2012 .

[6]  E. E. van Dyk,et al.  Analysis of the effect of parasitic resistances on the performance of photovoltaic modules , 2004 .

[7]  J. A. del Cueto,et al.  Method for analyzing series resistance and diode quality factors from field data of photovoltaic modules , 1998 .

[8]  Junji Yamaguchi,et al.  Fault detection by signal response in PV module strings , 2008, 2008 33rd IEEE Photovoltaic Specialists Conference.

[9]  V. Benda,et al.  Optimal resolution of LBIV/LBIC methods for diagnostics of solar cell homogeneity , 2008, 2008 26th International Conference on Microelectronics.

[10]  D. L. King,et al.  Dark current-voltage measurements on photovoltaic modules as a diagnostic or manufacturing tool , 1997, Conference Record of the Twenty Sixth IEEE Photovoltaic Specialists Conference - 1997.

[11]  Eleni Kaplani,et al.  Energy performance and degradation over 20 years performance of BP c-Si PV modules , 2011, Simul. Model. Pract. Theory.

[12]  Mandalay Grems,et al.  Standards , 1987, CACM.

[13]  S. Ransome,et al.  Advanced PV module performance characterization and validation using the novel Loss Factors Model , 2012, 2012 38th IEEE Photovoltaic Specialists Conference.

[14]  M. Vitelli,et al.  Analytical model of mismatched photovoltaic fields by means of Lambert W-function , 2007 .

[15]  C. Radue,et al.  A comparison of degradation in three amorphous silicon PV module technologies , 2010 .

[16]  G. Petrone,et al.  Symbolic algebra for the calculation of the series and parallel resistances in PV module model , 2013, 2013 International Conference on Clean Electrical Power (ICCEP).

[17]  B. Sopori,et al.  Understanding light-induced degradation of c-Si solar cells , 2012, 2012 38th IEEE Photovoltaic Specialists Conference.

[18]  Carl R. Osterwald.  Standards, Calibration and Testing of PV Modules and Solar Cells , 2003 .

[19]  Carlos Andrés Ramos-Paja,et al.  Photovoltaic modules diagnostic: An overview , 2013, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society.

[20]  Nuri Gokmen,et al.  Simple diagnostic approach for determining of faulted PV modules in string based PV arrays , 2012 .

[21]  Pedro Rodriguez,et al.  A low-disturbance diagnostic function integrated in the PV arrays' MPPT algorithm , 2011, IECON 2011 - 37th Annual Conference of the IEEE Industrial Electronics Society.

[22]  Jung-Wook Park,et al.  Diagnosis of Output Power Lowering in a PV Array by Using the Kalman-Filter Algorithm , 2012, IEEE Transactions on Energy Conversion.

[23]  Gaston H. Gonnet,et al.  On the LambertW function , 1996, Adv. Comput. Math..

[24]  William A. Beckman,et al.  Improvement and validation of a model for photovoltaic array performance , 2006 .

[25]  E. E. van Dyk,et al.  Assessing the reliability and degradation of photovoltaic module performance parameters , 2004, IEEE Transactions on Reliability.

[26]  Thomas Kirchartz,et al.  Reciprocity between electroluminescence and quantum efficiency used for the characterization of silicon solar cells , 2009 .

[27]  D. L. King,et al.  Photovoltaic module performance and durability following long‐term field exposure , 2000 .

[28]  Takashi Minemoto,et al.  Ten years outdoor operation of silicon based photovoltaic modules at central latitude of Japan , 2012 .