Experimental Study on Wind Acceleration Effect in Wind Farms with Complex Terrain

doi:10.11930/j.issn.1004-9649.202011049

Electric Power ›› 2022, Vol. 55 ›› Issue (3): 187-192,212.DOI: 10.11930/j.issn.1004-9649.202011049

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Experimental Study on Wind Acceleration Effect in Wind Farms with Complex Terrain

YAN Xiaosheng¹, LI Yue², GAO Xiaoxia², WANG Xi³

1. Fujian Wind Power Co., Ltd., China Guodian Corporation, Fuzhou 350800, China;
2. School of Energy Power and Mechanical Engineering, North China Electric Power University, Baoding 071003, China;
3. Hebei Longyuan Wind Power Co., Ltd., Zhangjiakou 075000, China

Received:2020-11-13 Revised:2021-10-29 Online:2022-03-28 Published:2022-03-29
Supported by:
This work is supported by National Natural Youth Science Foundation of China (Theoretical and Experimental Studies on the 3D Single and Wind Farm Wake Characteristics for Horizontal Wind Turbine, No.51606068), Natural Science Foundation of Hebei Province (Study on Collaborative Control Strategy of Wind Farm Under the Coupling Action of Terrain and Wake , No.E2019502072), and Fundamental Research Fund for the Central Universities (Study on the Internal Flow Mechanism of Wind Farm Under the Coupling Action of Terrain and Wake, No.2020MS107).

Abstract

Abstract: Sloping land makes the speed of the inflow on the flat land increase after a certain height difference, which results in the wind acceleration effect. Experiments were conducted in a mountain wind farm to obtain the flow field data of the slope wind field and study the influence of slope terrain on the wind acceleration effect. Experimental results show that the acceleration effect is related to the altitude of the slope, and the measured acceleration ratio at high altitudes is only about 16.9% of that predicted by Taylor’s original algorithm. Moreover, both the slope and the wind direction are also factors affecting the acceleration effect. Generally, the acceleration effect becomes more prominent when the slope is greater. In this experiment, the acceleration ratio in the positions with a larger slope is increased by 61.6%, and the acceleration ratio on the crosswind side of the slope is about 10% larger than that on the windward side. Meanwhile, the reasons for errors generated by Taylor’s original algorithm are analyzed, and the modified formula of Taylor’s method suitable for complex terrain is proposed in this paper.

Key words: acceleration effect of sloping land, wind farm experiment, complex terrain, inflow conditions, Taylor algorithm

YAN Xiaosheng, LI Yue, GAO Xiaoxia, WANG Xi. Experimental Study on Wind Acceleration Effect in Wind Farms with Complex Terrain[J]. Electric Power, 2022, 55(3): 187-192,212.

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Experimental Study on Wind Acceleration Effect in Wind Farms with Complex Terrain

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