Toward the Design of Control Algorithms for a Photovoltaic Equalizer: Detecting Shadows Through Direct Current Sampling

The photovoltaic (PV) equalizer is a promising response to the problems of partial shading in PV modules. This paper studies its use to detect the presence of the shadow and to estimate its shape. It proposes a shadow model suited for describing the shadow and its changes over time as well as a method for estimating the estate of the shadow. This method is then studied through a theoretical approach, followed by simulations, and all results are validated through measurements.

[1]  Naehyuck Chang,et al.  Enhancing efficiency and robustness of a photovoltaic power system under partial shading , 2012, Thirteenth International Symposium on Quality Electronic Design (ISQED).

[2]  Kay Soon Low,et al.  A Global Maximum Power Point Tracking Scheme Employing DIRECT Search Algorithm for Photovoltaic Systems , 2010, IEEE Transactions on Industrial Electronics.

[3]  Seddik Bacha,et al.  Forecasting photovoltaic array power production subject to mismatch losses , 2010 .

[4]  G Acciari,et al.  Higher PV Module Efficiency by a Novel CBS Bypass , 2011, IEEE Transactions on Power Electronics.

[5]  Massimo Vitelli,et al.  A multivariable MPPT algorithm for granular control of photovoltaic systems , 2010, 2010 IEEE International Symposium on Industrial Electronics.

[6]  Thomas Reindl,et al.  Outdoor PV Module Performance under Fluctuating Irradiance Conditions in Tropical Climates , 2013 .

[7]  Felix A. Farret,et al.  Alternative Sources of Energy , 2006 .

[8]  Bertrand Raison,et al.  Toward the Design of Control Algorithms for a Photovoltaic Equalizer: Choosing the Optimal Switching Strategy and the Duty Cycle , 2014, IEEE Transactions on Power Electronics.

[9]  Gun-Woo Moon,et al.  A New Buck-boost Type Battery Equalizer , 2009, 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition.

[10]  Louis L. Bucciarelli,et al.  Power loss in photovoltaic arrays due to mismatch in cell characteristics , 1979 .

[11]  F. Chenlo,et al.  Experimental study of mismatch and shading effects in the I-V characteristic of a photovoltaic module , 2006 .

[12]  K. Naito,et al.  Simulation of I–V characteristics of a PV module with shaded PV cells , 2003 .

[13]  Kashif Ishaque,et al.  An Improved Particle Swarm Optimization (PSO)–Based MPPT for PV With Reduced Steady-State Oscillation , 2012, IEEE Transactions on Power Electronics.

[14]  Geoffrey R. Walker,et al.  PV string per-module maximum power point enabling converters , 2003 .

[15]  Peter Lehman,et al.  Effects of mismatch losses in photovoltaic arrays , 1995 .

[16]  L. Zhang,et al.  Multilevel DC-Link Inverter and Control Algorithm to Overcome the PV Partial Shading , 2013, IEEE Transactions on Power Electronics.

[17]  Toshihisa Shimizu,et al.  A novel high-performance utility-interactive photovoltaic inverter system , 2003 .

[18]  Z. Salam,et al.  A retrofit circuit to increase output power of PV system during partial shading condition , 2011, 2011 IEEE PES Conference on Innovative Smart Grid Technologies - Middle East.

[19]  N. D. Kaushika,et al.  An investigation of mismatch losses in solar photovoltaic cell networks , 2007 .

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

[21]  A. Bidram,et al.  Control and Circuit Techniques to Mitigate Partial Shading Effects in Photovoltaic Arrays , 2012, IEEE Journal of Photovoltaics.

[22]  Bertrand Raison,et al.  A Power Electronics Equalizer Application for Partially Shaded Photovoltaic Modules , 2013, IEEE Transactions on Industrial Electronics.

[23]  B. Raison,et al.  Changing photovoltaic array interconnections to reduce mismatch losses: a case study , 2010, 2010 9th International Conference on Environment and Electrical Engineering.

[24]  Toshihisa Shimizu,et al.  Generation control circuit for photovoltaic modules , 2001 .

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

[26]  Doron Shmilovitz,et al.  A returned energy architecture for improved photovoltaic systems efficiency , 2010, Proceedings of 2010 IEEE International Symposium on Circuits and Systems.

[27]  Saad Mekhilef,et al.  Simulation and Hardware Implementation of Incremental Conductance MPPT With Direct Control Method Using Cuk Converter , 2011, IEEE Transactions on Industrial Electronics.

[28]  R. Giral,et al.  PV field distributed maximum power point tracking by means of an active bypass converter , 2011, 2011 International Conference on Clean Electrical Power (ICCEP).

[29]  Joseph Appelbaum,et al.  A method for screening solar cells , 1995 .

[30]  Gerard Champenois,et al.  New converter topology to improve performance of photovoltaic power generation system under shading conditions , 2011, 2011 International Conference on Power Engineering, Energy and Electrical Drives.