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Derivation of Nacelle Transfer Function Using LiDAR Measurement

라이다(LiDAR) 측정을 이용한 나셀전달함수의 유도

  • Kim, Hyun-Goo (New-Renewable Energy Resource Center, Korea Institute of Energy Research) ;
  • Kang, Yong-Heack (New-Renewable Energy Resource Center, Korea Institute of Energy Research) ;
  • Yun, Chang-Yeol (New-Renewable Energy Resource Center, Korea Institute of Energy Research)
  • 김현구 (한국에너지기술연구원, 신재생에너지자원센터) ;
  • 강용혁 (한국에너지기술연구원, 신재생에너지자원센터) ;
  • 윤창열 (한국에너지기술연구원, 신재생에너지자원센터)
  • Received : 2015.02.27
  • Accepted : 2015.07.15
  • Published : 2015.09.01

Abstract

Nacelle anemometers are mounted on wind-turbine nacelles behind blade roots to measure the free-stream wind speed projected onto the wind turbine for control purposes. However, nacelle anemometers measure the transformed wind speed that is due to the wake effect caused by the blades' rotation and the nacelle geometry, etc. In this paper, we derive the Nacelle Transfer Function (NTF) to calibrate the nacelle wind speed to the free-stream wind speed, as required to carry out the performance test of wind turbines according to the IEC 61400-12-2 Wind-Turbine Standard. For the reference free-stream wind data, we use the Light Detection And Ranging (LiDAR) measurement at the Shinan wind power plant located on the Bigeumdo Island shoreline. To improve the simple linear regression NTF, we derive the multiple nonlinear regression NTF. The standard error of the wind speed was found to have decreased by a factor of 9.4, whereas the mean of the power-output residual distribution decreased by 6.5 when the 2-parameter NTF was used instead of the 1-parameter NTF.

Keywords

Nacelle Transfer Function(NTF);Nacelle Anemometer;Wind Turbine;LiDAR(Light Detection And Ranging);Multiple regression analysis

Acknowledgement

Supported by : 한국에너지기술연구원

References

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