Transactions of the Korean Society of Mechanical Engineers B (대한기계학회논문집B)

The Korean Society of Mechanical Engineers (대한기계학회)
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Verification of the Validity of WRF Model for Wind Resource Assessment in Wind Farm Pre-feasibility Studies

풍력단지개발 예비타당성 평가를 위한 모델의 WRF 풍황자원 예측 정확도 검증

  • Her, Sooyoung (Multidisciplinary Graduate School Program for Wind Energy, Jeju Nat'l Univ.) ;
  • Kim, Bum Suk (Faculty of Wind Energy Engineering Graduate School, Jeju Nat'l Univ.) ;
  • Huh, Jong Chul (Dept. of Mechanical Engineering, Jeju Nat'l Univ.)
  • 허수영 (제주대학교 풍력특성화협동과정) ;
  • 김범석 (제주대학교 풍력공학부) ;
  • 허종철 (제주대학교 기계공학부)
  • Received : 2015.03.03
  • Accepted : 2015.06.19
  • Published : 2015.09.01
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Abstract

In this paper, we compare and verify the prediction accuracy and feasibility for wind resources on a wind farm using the Weather Research and Forecasting (WRF) model, which is a numerical weather-prediction model. This model is not only able to simulate local weather phenomena, but also does not require automatic weather station (AWS), satellite, or meteorological mast data. To verify the feasibility of WRF to predict the wind resources required from a wind farm pre-feasibility study, we compare and verify measured wind data and the results predicted by WAsP. To do this, we use the Pyeongdae and Udo sites, which are located on the northeastern part of Jeju island. Together with the measured data, we use the results of annual and monthly mean wind speed, the Weibull distribution, the annual energy production (AEP), and a wind rose. The WRF results are shown to have a higher accuracy than the WAsP results. We therefore confirmed that WRF wind resources can be used in wind farm pre-feasibility studies.

본 논문에서는 국지적 기상현상의 모사가 가능하고 AWS, 기상탑, 또는 위성자료의 입력이 필요치 않은 WRF 기상수치모델을 이용하여, 풍력단지의 풍황자원 예측정확도 및 적용타당성을 비교 검증하고자 한다. 풍력단지개발 예비타당성단계에서 요구되는 풍황자원 예측을 위한 WRF 모델의 적용타당성 검증을 위해, 기상탑 풍황측정자료와 WAsP에 의한 풍황자원 예측결과와의 비교 검증을 수행하였고 제주도 북서쪽에 위치한 평대와 우도사이트를 비교 검증용 사이트로 선정하였다. 연 월평균풍속, 와이블분포, 연간발전량 및 바람장미의 예측결과가 실측자료와 비교 검증되었고 WRF 모델의 풍황해석결과는 WAsP의 결과에 비해 높은 예측 정확도를 나타내었다. 풍력단지개발 예비타당성 평가를 위한 WRF 모델의 풍황자원 예측가능성이 최종적으로 확인되었다.

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References

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