邊界層風場垂直結構及風機尾流效應的多光達與測風塔觀測研究

本研究記錄利用同時設置於風機上下游的三部垂直指向光達及一座測風塔，進行邊界層風場與風機入流與尾流風觀測實驗的結果。實驗的時間與地點為2018年6月15日到9月14日於臺中港，資料長度為92天，代表夏季西南季風時的觀測。觀測所得的資料，用來擬合出適用於描述臺灣本地的邊界層風場在不同風速與日夜間情形下垂直結構的公式。此外，並量化在強弱風速與日夜間等不同情境下的風機尾流效應。本文同時計算尾流效應在風機後方隨角度及沿下游距離的分布，前者可做為風電場設置時風機如何交錯排列的參考，後者可用來評估適合在風機下游架設另一台風機的位置，以及計算對周遭風機發電量的影響。本研究的長期風場觀測資料亦可以用來驗證高解析度數值模式的模擬結果。

關鍵字

風機；邊界層；光達觀測；尾流

並列摘要

In this study data observed by three vertical-pointing lidars and one wind tower during a field experiment were used to investigate the wind structure within boundary layer and wake flow effect caused by wind turbine. The experiment lasted for 92 days, from 15 June to 14 September in 2018, which represented the southwesterly monsoon flow. The observational data are utilized to construct the formulas suitable for describing the local vertical profiles of wind within boundary layer under different wind speeds and in day or night time. In addition, the wind-turbine wake flow effects are investigated through the analysis of wind speed, wind direction, and their root-mean-square errors. The dependence of the wake flow effect on the angular position and downstream distance behind the turbine is examined. This information can be of importance in terms of optimizing the deployment of multiple wind turbines, and estimating the impact on power generation produced by nearby wind turbines. The long-term observational data collected in this research can also be used to validate simulation results from high resolution numerical models.

並列關鍵字

wind turbine ； boundary layer ； lidar observation ； wake flow

國際替代計量

邊界層風場垂直結構及風機尾流效應的多光達與測風塔觀測研究

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