Experimental comparison between an “information based” MPPT algorithm and standard P&O in both partial shading and uniform illumination

In this paper a maximum power point tracking algorithm able to drive the operating point of a partially shaded photovoltaic system toward the global maximum power point is analyzed. The algorithm exploits detailed information about the electrical parameters of all solar panels forming the solar system gained by means of a distributed sensor network, which monitors the operation of the solar field at a very high granularity level. Data collected by the monitoring system are exploited to reconstruct the power voltage curve of the photovoltaic system, thus recognizing the presence of multiple local maxima and their exact voltage position. Experiments performed on a pilot solar filed equipped with the sensor network evidence the reliability of the analyzed approach. A convergence time of about 2.5 s was achieved independently of illumination conditions and, in case of partial shadowing, an increment of 90 W (50% more) with respect to a standard tracking algorithm.

[1]  S. Daliento,et al.  Experimental Study on Power Consumption in Lifetime Engineered Power Diodes , 2009, IEEE Transactions on Electron Devices.

[2]  Paolo Spirito,et al.  An improved model for extraction of strongly spatial dependent lifetimes with the AC lifetime profiling technique , 1999 .

[3]  Santolo Daliento,et al.  Analytical modelling and minority current measurements for the determination of the emitter surface recombination velocity in silicon solar cells , 2007 .

[4]  V. d’Alessandro,et al.  A Simple Bipolar Transistor-Based Bypass Approach for Photovoltaic Modules , 2014, IEEE Journal of Photovoltaics.

[5]  Kashif Ishaque,et al.  A review of maximum power point tracking techniques of PV system for uniform insolation and partial shading condition , 2013 .

[6]  Brad Lehman,et al.  An Adaptive Solar Photovoltaic Array Using Model-Based Reconfiguration Algorithm , 2008, IEEE Transactions on Industrial Electronics.

[7]  F. Blaabjerg,et al.  A review of single-phase grid-connected inverters for photovoltaic modules , 2005, IEEE Transactions on Industry Applications.

[8]  Massimo Vitelli,et al.  Distributed maximum power point tracking of photovoltaic arrays: Novel approach and system analysis , 2008, IEEE Transactions on Industrial Electronics.

[9]  P. Guerriero,et al.  A PV AC-module based on coupled-inductors boost DC/AC converter , 2014, 2014 International Symposium on Power Electronics, Electrical Drives, Automation and Motion.

[10]  S. Daliento,et al.  Approximate Closed-Form Analytical Solution for Minority Carrier Transport in Opaque Heavily Doped Regions Under Illuminated Conditions , 2006, IEEE Transactions on Electron Devices.

[11]  S. Daliento,et al.  Experimental measurements of majority and minority carrier lifetime profile in SI epilayers by the use of an improved OCVD method , 2005, IEEE Electron Device Letters.

[12]  Vincenzo d'Alessandro,et al.  Accurate Maximum Power Tracking in Photovoltaic Systems Affected by Partial Shading , 2015 .

[13]  M Gargiulo,et al.  A novel wireless self-powered microcontroller-based monitoring circuit for photovoltaic panels in grid-connected systems , 2010, SPEEDAM 2010.

[14]  Nevzat Onat,et al.  Recent Developments in Maximum Power Point Tracking Technologies for Photovoltaic Systems , 2010 .

[15]  Vincenzo d'Alessandro,et al.  Dynamic reconfiguration of solar systems for avoiding MPPT faults due to architectural partial shading , 2015, 2015 IEEE 15th International Conference on Environment and Electrical Engineering (EEEIC).

[16]  Vincenzo d'Alessandro,et al.  A power line communication on DC bus with photovoltaic strings , 2014 .

[17]  V. d’Alessandro,et al.  Effective real-time performance monitoring and diagnostics of individual panels in PV plants , 2013, 2013 International Conference on Clean Electrical Power (ICCEP).

[18]  Luigi Zeni,et al.  An optical technique to measure the bulk lifetime and the surface recombination velocity in silicon samples based on a laser diode probe system , 1998 .