전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제57권6호
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  • Pages.994-1002
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  • 2008
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  • 1975-8359(pISSN)
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  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

그림자 영향을 고려한 새로운 태양광 추적시스템 제어

Control of a Novel PV Tracking System Considering the Shadow Influence

  • 발행 : 2008.06.01
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초록

In this paper a novel tracking system is described, regarding the influence of shadow between array, aimed at improving the efficiency of PV tracking system. Comparing with a building site versus capacity power, domestic solar powers have a limited siting. Therefore, each array interferes with the shadow of other arrays. The loss by influence of those shadow can be compensated for by means of control algorithm of the tracking device. The paper suggests a method controlling an altitude for length which is received the shadow influence of PV array. By using an azimuth of current solar position and the length between arrays, the controller of tracking device is able to calculate the length between actual arrays and make a comparison of the shadow length at a specific time with the length between arrays. When the shadow length is longer than the length between arrays, the controller of tracking device can adjust a position by compensating error altitude of the length between arrays at an altitude of current solar position. In the paper, we develop the control algorithm able to minimize the loss caused by the influence of shadow on the PV tracking system, and compared this with conventional output system. The controller has been tested in the laboratory with proposed algorithm and shows excellent performance.

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참고문헌

  1. H. J. Noh, D. Y. LEE, D. S. Hyun, "An improved MPPT converter with current compensation method for small scaled PV-applications", IEEE IES, Vol.2 (2002), pp. 1113-1118
  2. R. Andoubi, A. Mami, G. Dauphin, M. Annabi, "Bond graph modelling and dynamic study of a photovoltaic system using MPPT buck-boost converter", IEEE ICS, Vol. 3(2002), pp. 200-205
  3. W. A. Lynch, M. Salameh, "Simple eletro-optically controlled dual axis sun tracker", Solar Energy, Vol. 45(1990), pp. 65-69 https://doi.org/10.1016/0038-092X(90)90029-C
  4. E. A. barber, H. A. Ingley, C. A. Morrison, " A solar powered tracking device for driving concentrating collectors", Alternative Energy Source, Vol. 1(1997), pp. 527-539
  5. B. P. Edwards, 'Computer based sun following system', Solar Energy, Vol. 21(1998), PP. 491-496 https://doi.org/10.1016/0038-092X(78)90073-7
  6. Cooper P. I., 1969, "The absorbtion of radiation in solar stills", Solar Energy 12, 333-346 https://doi.org/10.1016/0038-092X(69)90047-4
  7. L. O. Lamm, 1981, "A new analytic expression for the equation of time", Solar Energy 26, 465 https://doi.org/10.1016/0038-092X(81)90229-2
  8. J. W. Spencer, 1989, Comments on "The astronomical almanac's algorithm for approximate solar position (1950-2050)", Solar Energy Vol. 42, No. 4, 353 https://doi.org/10.1016/0038-092X(89)90039-X
  9. J. J. Michalsky, 1988, "The astronomical almanac's algorithm for approximate solar position (1950-2050)", Solar Energy, Vol. 40, No. 3, 227-235 https://doi.org/10.1016/0038-092X(88)90045-X
  10. L. L. Vant-Hull, A. F. Hildebrandt, 1976, " Solar thermal power system based on optical transmission", Solar Energy 18, 31-39 https://doi.org/10.1016/0038-092X(76)90033-5
  11. R. Walraven, 1978, "Calculating the position of the Sun", Solar Energy 20, 393-397 https://doi.org/10.1016/0038-092X(78)90155-X
  12. M.C. Alonso-Gaica, "Experimental study of mismatch and shading effects in the I-V characteristic of photovoltaic module", Solar Energy Materials and Solar Cells, Volume 90, Issue 3, P.329, 2004
  13. 김형석, 박정민, 외 3인, "마이크로 콘트롤러를 이용한 태양광발전용 승압초퍼용 MPPT 제어기에 관한 연구"
  14. Geoff Walker, "Evaluating MPPT converter Topologies using a Matlab PV model", IEAust, vol. 21, pp. 49-56, 2001
  15. D. Feuermann, and A. Zemel, Validation of Models For Global Irradiance, on Inclined Planes, Solar Energy, Vol. 48, No. 1, 1992
  16. T.M.Klucher, Evaluation of Models to Predict Insolation on Tilted Surface, Solar Energy, Vol.23, 1992
  17. McLean, S., S. Macmillan, S. Maus, V. Lesur, A. Thomson, and D. Dater, "The US/UK World Magnetic Model for 2005-2010", NOAA Technical Report NESDIS/NGDC-1, December 2004