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Analysis of Module Mismatch Loss in Solar PV String and Feasibility Study for Improvement Method  

Ahn, Hee-Wook (Dept. of Electronic Engineering, Kumoh National Institute of Technology)
Publication Information
Journal of the Korean Solar Energy Society / v.29, no.1, 2009 , pp. 58-63 More about this Journal
Abstract
In this paper, the power loss due to PV module mismatch in PV string is analyzed and a mismatch compensation method is proposed to improve the efficiency of PV system. The analysis of mismatch loss using PV model simulation reveals that the mismatch module may decrease the total efficiency because the MPPT function of power conditioner make the PV system operate at the local maximum point. The mismatch loss can be severe if the maximum power point current of mismatch module is less than that of string. The proposed compensation method which is simply implemented with a buck type converter shows the possibility to remove the mismatch loss. The effectiveness of the analysis and compensation method is verified by a prototype experiment.
Keywords
Solar PV power generation; Module mismatch; Mismatch Loss; Efficiecy improvement; Mismatch compensation converter, MCC;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 H.R. Enslin, M.S.Wolf, D.B.Snyman and W.Swiegers, 'Integrated photovoltaic maximum power point tracking converter', IEEE Trans. Ind. Electronics., vol. 44, pp. 769-773, Dec. 1997   DOI   ScienceOn
2 김경수, 강기환, 유권종, '옥외 설치된 비정질 실리콘 박막태양전지모듈의 전기적출력 특성 분석', 한국태양학회 논문집, Vol. 28, No. 4, pp.62-67, 2008
3 T. Esram, P.L.Chapman, 'Comparison of Photovoltaic Array Maximum', IEEE Tr. on Energy Conversion, Vol.22, No.2, pp.439-449, June 2007   DOI   ScienceOn
4 D. Shmilovitz, 'On the control of photovoltaic maximum power point tracker via output paranleters,'' in IEE Proc. Elect. Power Appl., pp. 239 - 248, 2005
5 S.B.Kjaer, K.Pedersen, F.Blaabjerg, 'A Review of Single-Pahse Grid-Connected Inverters for PV Modules', IEEE Tr. on IA, Vol.41 , No.5, pp.1292-1306, 2005   DOI   ScienceOn
6 G. Walker, 'Evaluating MPPT Converter Topologies using MATLAB PV Model', J of Electrical & Electronics Engineering Austrailia, Vol.21, pp.49-56, 2001
7 G. Walker, P. Sernia, 'Cascaded DC-DC Converter Connection of Photovoltaic Modules', IEEE Tr. on P.E., Vol.19, No.4, pp.1130-1139, July 2004   DOI   ScienceOn