Analysing wind farm efficiency on complex terrains
Analysing wind farm efficiency on complex terrains
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分析复杂地形上的风电场效率
DOI：
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发表时间：
2014
期刊：
影响因子：
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通讯作者：
J. Rodrigo
中科院分区：
文献类型：
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作者：
F. Castellani;D. Astolfi;L. Terzi;K. Hansen;J. Rodrigo
陆上风电场的实际性能深受尾流相互作用和地形复杂性的影响，因此，监测风电场效率随风向的变化是一项至关重要的任务。因此，极地效率图是监测风电场性能的有用工具。对于陆上风力发电场来说，这种方法值得仔细讨论，因为地形和布局通常会影响绩效评估。目前的工作涉及三个现代风力发电场，由Sorgenia Green拥有，位于坡度从平缓到崎岖的丘陵地带。并以Nprrekffir Enge陆上风电场为例进行了分析：其布局与海上风电场相似，效率主要由尾流驱动。结果表明，地形复杂性为极地效率的定义提供了一种新的、更一致的方法，这是合理的。分析和讨论了效率与风向、农场布局和地形的关系。大气稳定性的影响也通过来自NASA卫星的MERRA再分析数据进行了研究。莫宁-奥布霍夫长度被用来区分气候制度。
Actual performances of onshore wind farms are deeply affected both by wake interactions and terrain complexity: therefore monitoring how the efficiency varies with the wind direction is a crucial task. Polar efficiency plot is therefore a useful tool for monitoring wind farm performances. The approach deserves careful discussion for onshore wind farms, where orography and layout commonly affect performance assessment. The present work deals with three modern wind farms, owned by Sorgenia Green, located on hilly terrains with slopes from gentle to rough. Further, onshore wind farm of Nprrekffir Enge has been analysed as a reference case: its layout is similar to offshore wind farms and the efficiency is mainly driven by wakes. It is shown and justified that terrain complexity imposes a novel and more consistent way for defining polar efficiency. Dependency of efficiency on wind direction, farm layout and orography is analysed and discussed. Effects of atmospheric stability have been also investigated through MERRA reanalysis data from NASA satellites. Monin-Obukhov Length has been used to discriminate climate regimes.