Ahmed M. Mahmoud, Salah M. Saafan, Ahmed M. Attalah



Enhancement of the rooftop Photovoltaic array characteristic interconnected by the grid under partial shading condition by using cascaded DC/DC converter

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The photovoltaic (PV) Power generation is the best source of renewable energy due to advantages such as free fuel cost, cleanness, little maintenance, and causing no noise due to absence of moving parts. The Egyptian government moves towards encourage the consumer to generate electricity from PV array and issues new electricity law that allow the consumer to sell the surplus of the generated power of PV to utility. The partial shading is one of the obstacles of the propagation of the generation of electricity by PV array. Partial shading may be occurs due to clouds, trees and neighbor building. This paper propose a new method for optimization the power of a rooftop photovoltaic (PV) array connected to grid under partial shading. This paper provides a comparative literature review on methods to mitigate these effects and the drawbacks of this methods. This paper represent the components of the interconnection between the rooftop PV array and the grid. The Maximum power point (MPP) achieved by perturb and observe technique which control the duty cycle of the buck boost converter. The proposed technique increased the output power of the PV and output efficiency during the partial shading condition.


Partial shading; Cascaded DC/DC converter; MATLAB Simulink; rooftop Photovoltaic array, on grid Photovoltaic.


[1] K. Ding, X. Bian and H. Liu, 'Matlab- Simulink Based Modeling to Study the Influence of no uniform Insolation Photovoltaic Array’, Power and Energy Engineering Conference (AAEEC), 2011 Asia-Pacific, pp. 1–4, 25-28 March 2011.

[2] S.R. Chowdhury and H. Saha, 'Maximum Power Point Tracking of Partially Shaded Solar Photovoltaic Arrays’, Solar Energy Materials and Solar Cells, Vol. 94, N°9, pp. 1441 - 1447, 2010.

[3] http://www.nrea.gov.eg/arabic1.html


[5] G.R. Walker, P.C. Serina, Cascaded DC–DC converter connection of photovoltiac modules, IEEE Trans. Power Electron. 19 (2004) 1130–1139.

[6] Walid Emar, Zayed Huneiti , Sofyan Hayajneh, 'Analysis, Synthesis and Simulation of Compact Two-channel Boost Converter for Portable Equipments Operating with a Battery or Solar Cell’, International Conference on Communication, Management and Information Technology (ICCMIT 2015), Procedia Computer Science 65 ( 2015 ) 241 – 248

[7] Sara M. MacAlpine, Robert W. Erickson, Fellow, IEEE, and Michael J. Brandemuehl, 'Characterization of power optimizer potential to increase energy capture in photovoltaic systems operating under non-uniform conditions’, TPEL-Reg-2012-05-0656.

[8] Toshihisa Shimizu, Member, IEEE, Masaki Hirakata, Tomoya Kamezawa, and Hisao Watanabe, 'Generation Control Circuit for Photovoltaic Modules’, IEEE TRANSACTIONS ON POWER ELECTRONICS, VOL. 16, NO. 3, MAY 2001

[9] B.Paranthagan, M.Marimuthu, M.Karthiga, 'Global Maximum Power Point Tracking Under Partial Shading Condition Using SEPIC Converter’, International Journal of Advanced Research in Electrical,Electronics and Instrumentation Engineering, Vol. 4, Issue 2, February 2015.

[10] Ali Bidram, Student Member, IEEE, Ali Davoudi, Member, IEEE, and Robert S. Balog, Senior Member, IEEE, 'Control and Circuit Techniques to Mitigate Partial Shading Effects in Photovoltaic Arrays’, IEEE JOURNAL OF PHOTOVOLTAICS, VOL. 2, NO. 4, OCTOBER 2012.

[11] Xiangyang Gong a, Manohar Kulkarni, 'Design optimization of a large scale rooftop photovoltaic system’, Volume 78, Issue 3, March 2005, Pages 362–374.

[12] Modeling of Maximum Power Point Tracking Algorithm forPhotovoltaic Systems, Ioan Viorel Banu,Marcel Istrate “Gheorghe Asachi” Technical University of Iasi.

Cite this paper

Ahmed M. Mahmoud, Salah M. Saafan, Ahmed M. Attalah. (2018) Enhancement of the rooftop Photovoltaic array characteristic interconnected by the grid under partial shading condition by using cascaded DC/DC converter. International Journal of Power Systems, 3, 42-52


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