A Study on Method for Identifying Capacity Factor Declination of Wind Turbines

Authors: Dongheon Shin, Kyungnam Ko, Jongchul Huh

Abstract:

The investigation on wind turbine degradation was carried out using the nacelle wind data. The three Vestas V80-2MW wind turbines of Sungsan wind farm in Jeju Island, South Korea were selected for this work. The SCADA data of the wind farm for five years were analyzed to draw power curve of the turbines. It is assumed that the wind distribution is the Rayleigh distribution to calculate the normalized capacity factor based on the drawn power curve of the three wind turbines for each year. The result showed that the reduction of power output from the three wind turbines occurred every year and the normalized capacity factor decreased to 0.12%/year on average.

Keywords: Wind energy, Power curve, Capacity factor, Annual energy production.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1337821

References:

[1] G. Hughes, "The performance of wind farms in the United Kingdom and Denmark", Renewable Energy Foundation. pp. 48, 2012.
[2] J. Harrison, "Viability of the Algonquin power Amherst Island wind energy generating system", Association to protect Amherst Island. 2012.
[3] International Electrotechnical Commission, IEC 61400-1, 3rd ed. wind turbines - Part 1: Design requirements.
[4] A. Albers, H. Klug and D. Westermann, "Power performance verification", 1999 European Wind Energy Conference, Nice, France, pp.657-660, 1999.
[5] B. Smith, H. Link, G. Randall and T. McCoy, "Applicability of nacelle anemometer measurements for use in turbine power performance tests", National Renewable Energy Lab, 2002.
[6] International Electrotechnical Commission, IEC 61400-12-2, 1st ed. wind turbines - Part 12-2: Power performance of electricity-producing wind turbines based on nacelle anemometry.
[7] D. H. Shin, H. W. Kim and K. N. Ko, "Analysis of wind turbine degradation using the nacelle transfer function", Journal of Mechanical Science and Technology, submitted for publication.
[8] PF. Bach, "Capacity factor degradation for Danish wind turbines", Paul-Frederik Bach report, 2012.
[9] International Electrotechnical Commission, IEC 61400-12-1, 1st ed. wind turbines - Part 12-1: Power performance measurements of electricity producing wind turbines.
[10] H. W. Kim, K. N. Ko and J. C. Huh, "Wind turbine power performance testing using nacelle transfer function", Journal of the Korean Solar Energy Society, 33(4), pp.51-8. 2013.
[11] A. Curvers and P.A. van der Werff, "OWEZ wind farm efficiency", ECN-E-08-092, pp.11-13, 2009.