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

The Korean Society of Mechanical Engineers (대한기계학회)
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Development of Wind Farm AEP Prediction Program Considering Directional Wake Effect

방향별 후류를 고려한 풍력발전단지 연간 에너지 생산량 예측 프로그램 개발 및 적용

  • Yang, Kyoungboo (Graduate School of Wind Energy Engineering, Jeju Nat'l Univ.) ;
  • Cho, Kyungho (Dept. of Mechatronics Engineering, Jeju Nat'l Univ.) ;
  • Huh, Jongchul (Dept. of Mechanical Engineering, Jeju Nat'l Univ.)
  • 양경부 (제주대학교 풍력공학부) ;
  • 조경호 (제주대학교 메카트로닉스공학과) ;
  • 허종철 (제주대학교 기계공학과)
  • Received : 2017.02.15
  • Accepted : 2017.04.20
  • Published : 2017.07.01
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Abstract

For accurate AEP prediction in a wind farm, it is necessary to effectively calculate the wind speed reduction and the power loss due to the wake effect in each wind direction. In this study, a computer program for AEP prediction considering directional wake effect was developed. The results of the developed program were compared with the actual AEP of the wind farm and the calculation result of existing commercial software to confirm the accuracy of prediction. The applied equations are identical with those of commercial software based on existing theories, but there is a difference in the calculation process of the detection of the wake effect area in each wind direction. As a result, the developed program predicted to be less than 1% of difference to the actual capacity factor and showed more than 2% of better results compared with the existing commercial software.

풍력발전단지에서 연간 에너지 생산량 예측의 정확도를 위해서는 바람 방향별 후류영향에 의한 풍속감소와 이에 따른 발전량 손실을 효과적으로 계산하여야 한다. 본 연구에서는 연간 에너지 생산량 예측을 위하여 방향별 후류영향을 고려한 계산 프로그램을 개발하고, 예측 적합성을 확인하기 위해 실제 풍력발전단지의 연간 에너지 생산량 분석 결과 및 기존 상용 소프트웨어의 계산결과와 비교하였다. 적용된 계산식들은 기존 이론들을 바탕으로 하고 있어 상용 소프트웨어와 동일하지만 풍향별 후류영향 범위의 계산과정에서 차이가 있다. 비교결과 개발 프로그램은 실제 풍력발전단지 전체 시스템 이용율에 1% 이내로 근접하였고 기존 상용 프로그램을 이용한 예측 결과보다 2% 이상 실제 연간 시스템 이용율에 근접하는 결과를 보여주었다.

Keywords

References

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