The energy yield of the photovoltaic (PV) system is reduced to a greater extent under shaded conditions. Reconfiguration and repositioning techniques demand more number of sensors, switches, and an efficient control algorithm and are well suited for rapidly changing shade conditions. However, for fixed shading that is common in urban rooftop installations, where the shading is partial and usually caused by nearby structures, a simple, yet effective technique is necessary. This paper addresses the issue by grouping the panels based on shade intensity and the merits of asymmetrical multilevel inverter (AMLI) are utilized as the working voltage of each group is different.
Issue Section:
Technical Brief
References
1.
Alonso-Garcia
, M. C.
, Ruiz
, J. M.
, and Chenlo
, F.
, 2006
, “Experimental Study of Mismatch and Shading Effects in the I–V Characteristic of a Photovoltaic
,” Sol. Energy Mater. Sol. Cells
, 90
(3
), pp. 329
–340
.10.1016/j.solmat.2005.04.0222.
Bishop
, J. W.
, 1988
, “Computer Simulation of the Effects of Electrical Mismatches in Photovoltaic Cell Interconnection Circuits
,” Sol. Cells
, 25
(1
), pp. 73
–89
.10.1016/0379-6787(88)90059-23.
Villalva
, M. G.
, Gazoli
, J. R.
, and Filho
, E. R.
, 2009
, “Comprehensive Approach to Modeling and Simulation of Photovoltaic Arrays
,” IEEE Trans. Power Electron.
, 24
(5
), pp. 1198
–1208
.10.1109/TPEL.2009.20138624.
Ramaprabha
, R.
, and Mathur
, B. L.
, 2012
, “A Comprehensive Review and Analysis of Solar Photovoltaic Array Configurations Under Partial Shaded Conditions
,” Int. J. Photoenergy
, 2012
(2012), pp. 1
–16
.10.1155/2012/1202145.
Silvestre
, S.
, Boronat
, A.
, and Chouder
, A.
, 2009
, “Study of Bypass Diodes Configuration on PVs’
,” Appl. Energy
, 86
(9
), pp. 1632
–1640
.10.1016/j.apenergy.2009.01.0206.
Patel
, H.
, and Agarwal
, V.
, 2008
, “Maximum Power Point Tracking Scheme for PV Systems Operating Under Partially Shaded Conditions
,” IEEE Trans. Ind. Electron.
, 55
(4
), pp. 1689
–1698
.10.1109/TIE.2008.9171187.
Bidram
, A.
, Davoudi
, A.
, and Balog
, R. S.
, 2012
, “Control and Circuit Techniques to Mitigate Partial Shading Effects in Photovoltaic Arrays
,” IEEE J. Photovoltaics
, 2
(4
), pp. 532
–546
.10.1109/JPHOTOV.2012.22028798.
Woyte
, A.
, Nijs
, J.
, and Belmans
, R.
, 2003
, “Partial Shadowing of Photovoltaic Arrays With Different System Configurations: Literature Review and Field Test Results
,” Sol. Energy
, 74
(3
), pp. 217
–233
.10.1016/S0038-092X(03)00155-59.
Patnaik
, B.
, Sharma
, P.
, Trimurthulu
, E.
, Duttagupta
, S. P.
, and Agarwal
, V.
, 2011
, “Reconfiguration Strategy for Optimization of Solar Photovoltaic Array Under Non-Uniform Illumination Conditions
,” 37th IEEE Photovoltaic Special Conference
(PVSC
), Seattle, WA, June 19–24, Vol. 56
, p. 001859
.10.1109/PVSC.2011.618631410.
Nguyen
, D.
, and Lehman
, B.
, 2008
, “An Adaptive Solar Photovoltaic Array Using Model-Based Reconfiguration Algorithm
,” IEEE Trans. Ind. Electron.
, 55
(7
), pp. 2644
–2654
.10.1109/TIE.2008.92416911.
Kumar
, J.
, Das
, B.
, and Agarwal
, P.
, 2008
, “Selective Harmonic Elimination Technique for a Multilevel Inverter
,” Fifteenth National Power Systems Conference (NPSC)
, IIT
, Bombay, India
, pp. 608
–613
.12.
Azab
, M
., 2010
, “Particle Swarm Optimization-Based Solutions for Selective Harmonic Elimination in Single-Phase PWM Inverters
,” Int. J. Power Electron.
, 2
(2
), pp. 125
–142
.10.1504/IJPELEC.2010.03119013.
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