초록

In previous studies, a measuring technique for wind direction and speed with a roll-rotating horizontal three-axis ultrasonic anemometer was proposed and verified by wind tunnel tests. In this study, it was applied to a 4.3 MW wind turbine that has a nacelle anemometer and a wind lidar. In subsonic flow, the upstream is affected by downstream blockage such as a spinner, wind turbine blades, and a nacelle. From a blockage effect study with CFD analysis, the measuring point of the ultrasonic anemometer was selected and blockage correction equations were derived. At the measuring point, the wind speed and wind direction relative to the wind turbine, the so-called yaw error, were measured by the proposed technique and corrected with the derived equations. As a result, the blockage correction reduced the deviation of yaw error but overcorrected wind speed. So, the proposed method may be efficient for wind turbine yaw control because it has smaller yaw error fluctuation than a nacelle anemometer and a wind lidar. Blockage correction with met mast tests instead of CFD would produce better results. Various environmental tests such as in rain, snow, and dust in wind would also be a prerequisite for actual utilization.

키워드

회전측정기법, 초음파 풍속계, 풍향, 풍속, 요 제어, 요 오차, 풍력터빈

참고문헌(6)open

  1. [학술대회] Schlipf, D. / 2011 / Prospects of Optimization of Energy Production by LIDAR Assisted Control of Wind Turbines / Proceedings of European Wind Energy Conference and Exhibition : 14 ~ 17

  2. [학술대회] Kragh, K. A. / 2012 / Rotor Speed Dependent Yaw Control of Wind Turbines Based on Empirical Data / Proceedings of 50th AIAA Aerospace Sciences Meetings and Exhibit : 9 ~ 12

  3. [인터넷자료] Froese, M. / Increase AEP by 2% With Improved Wind Measurement

  4. [학술지] 장병희 / 2018 / 롤 회전하는 3축 초음파 풍속계를 활용한 풍향 풍속 측정기법 / 풍력에너지저널 9 (3) : 5 ~ 12

  5. [학술지] 장병희 / 2018 / 롤 회전하는 3축 초음파 풍속계를 활용한 풍향 풍속 측정기법(II) / 풍력에너지저널 9 (4) : 9 ~ 15

  6. [인터넷자료] / Gill Instruments