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태양광 발전시스템에서 PV의 부분 음영에 따른 부정합 손실 분석 및 개선방안 고찰
윤병근(ByungKeun Yoon),김승연(SeungYeon Kim),최상백(SangBack Choi),진용수(YongSu Jin),윤철(Chul Yun),권우현(WhooHyen Kwon) 한국신재생에너지학회 2016 신재생에너지 Vol.12 No.4
Generally PV power generation system consist of parallel connection of the PV strings which serially connected PV modules. Partial shading has effect on efficiency of PV power generation system, causing mismatch between PV strings. Compensation methods to reduce the mismatch loss have been investigated. these methods prefer to compensate the shaded PV modules increase system cost PV module weight. This paper suggests new method to reduce mismatch loss by compensating voltage to the string not to PV modules. Recognition of mismatch string is by comparing current between strings. only undervoltage is variably compensated to shaded string with low voltage source. imulation results with MATLAB/SIMULINK confirms the improvement of generation efficiency and compensation profit ratio.