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oai:www.ideals.illinois.edu:2142/16166 2023-07-10 col_2142_8888 col_2142_5131 com_2142_8887 com_2142_234 com_2142_5130

en Copyright 2010 Omar A. El Bassiouny photovoltaics inverter renewable energy systems performance efficiency modeling economic feasibility Chapman, Patrick L. El Bassiouny, Omar A. 2010-05-19T18:39:29Z 2010-05-19T18:39:29Z 2010-05-19T18:39:29Z A flexible and computationally effi cient analysis technique for designing and evaluating grid-connected photovoltaic (PV) systems is introduced, which establishes a direct relationship between the inputs to the system, temperature and irradiance, and system performance criteria. For a given year, temperature and irradiance data are rearranged to form a statistical distribution, eliminating thereby the direct time-dependence. The proposed technique decomposes the PV system into three separate layers: an ambient conditions, a PV output, and a dc-ac conversion layer. It reveals important trends, otherwise obscured in the time-dependent view of the data. The time-independent analysis technique is applied to the problem of optimizing inverter e ciency to improve the performance of residential PV systems. A parallel two-inverter con guration is proposed, where one inverter has a small rated power to handle the frequently occurring low-insolation conditions, while the other inverter is large enough to handle the high-insolation regime. The application of this new con guration leads to energy savings as well as e ciency and reliability improvements. A feasibility study taking into account the additional investments required to implement the suggested inverter con guration reveals that applying it under the current electricity prices does not make sense from the economic perspective. However, the two-inverter con guration can become an interesting option in the future as energy prices continue to rise and more nancial incentives for solar systems are introduced. Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-04-26T13:52:40Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 3 El Bassiouny_Omar.pdf: 964847 bytes, checksum: a02aa37de46eafba0ef661893a0a2035 (MD5) omar - MS thesis.tex: 59718 bytes, checksum: 19343f6140bc3c07859217c30ae17fcd (MD5) ElBassiouny_Omar.pdf: 964847 bytes, checksum: a02aa37de46eafba0ef661893a0a2035 (MD5) Made available in DSpace on 2010-05-19T18:39:29Z (GMT). No. of bitstreams: 4 El Bassiouny_Omar.pdf: 964847 bytes, checksum: a02aa37de46eafba0ef661893a0a2035 (MD5) omar - MS thesis.tex: 59718 bytes, checksum: 19343f6140bc3c07859217c30ae17fcd (MD5) ElBassiouny_Omar.pdf: 964847 bytes, checksum: a02aa37de46eafba0ef661893a0a2035 (MD5) license.txt: 4057 bytes, checksum: 4391048422eb424c975b322c0f6a059b (MD5) http://hdl.handle.net/2142/16166 Using time-independent analysis in optimizing inverter efficiency for grid-connected photovoltaic systems 2010-5 Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Thesis M.S. MS:Electr & Computer Eng-UIUC 10KS1200MS