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Analysis and study for MPPT algorithms in transformerless PV PCS
이경수(Kyung-Soo Lee),정영석(Young-Seck Jung),소정훈(Jung-Hoon So),유권종(Gwon-Jong Yu),최재호(Jae-Ho Choi) 전력전자학회 2004 전력전자학술대회 논문집 Vol.- No.-
Maximum power point tracking(MPPT) is usually used for a solar power system. Many maximum power tracking techniques have been considered in the past. The microprocessors with appropriate MPPT algorithms are favored because of their flexibility and compatibility with different solar arrays. In this paper, four MPPT algorithms are analyzed and studied. Perturbation and Observation(P&O), Incremental Conductance(IncCond), which are used from the past. Improved P&O and Two-mode , which are developed P&O and IncCond algorithms. Also, the author introduces grid-connected transformerless PV PCS to apply MPPT control. MPPT efficiency is measured by changing irradiance from 0.1㎾/㎡ to 1㎾/㎡ and simulation was performed for each MPPT algorithm.
박경은(Park Kyung-Eun),강기환(Kang Gi-Hwan),김현일(Kim Hyun-Il),소정훈(So Jung-Hoon),유권종(Yu Gwon-Jong),김준태(Kim Jun-Tae),이길송(Lee Kil-Song) 한국태양에너지학회 2009 한국태양에너지학회 논문집 Vol.29 No.1
We intend to describe a 12kW building-integrated photovoltaic system which was applied into the south wall of a new building. This study showed the results that were appeared from describing the PV module manufacture and installation process, and performing generation performance analysis of BIPV system. From the result we confirmed that the generation performance of the BIPV system was changed by season. The performance ratio(PR) was about 83.6% in winter and it means that performance of this BIPV system was so good in that season. On the other hand, the PR in summer was about 75.0% dropped about 8%. It was believed that the change was influenced by the reduction of solar radiation irradiated into the PV modules by installation position and rainy spell in summer. And we also confirmed that low irradiation condition is cause of the additional loss in the total PV system. In this case, the efficiency ratio of PCS drops significantly at low input loads and the average conversion effieciency of PCS in summer was 76.4% decreased about 10% from 86% in winter.