检测和校准全球陆上风力发电评估中的重大偏差,跨时间尺度
Chengzhi Hou1, Zhiwei Xu2, Kristopher B Karnauskas3,4
1School of Geography and Ocean Science, Nanjing University, Nanjing, China.
Nature communications
|April 22, 2025
概括
使用每日风速数据显著低估了风力功率密度 (WPD). 一种新的校准方法纠正了这种偏差,改善了气候缓解努力的未来风能预测.
科学领域:
- 可再生能源系统可再生能源系统
- 气候科学 气候科学
- 大气物理学 大气物理学
背景情况:
- 全球风力发电容量正在扩大,但WPD评估的不准确性阻碍了气候变化减缓.
- 在风速数据中,较粗的时间分辨率 (例如,每日) 会导致WPD的大幅低估.
- 由于风速分布的性质,这种低估在风速较低的地区尤其明显.
研究的目的:
- 用每日和每小时的风速数据量化全球陆上WPD的低估值.
- 开发和验证一个校准方法,以协调WPD估计在不同的时间分辨率.
- 根据气候变化情景,预测这种校准对未来风能潜力的影响.
主要方法:
- 从每日和每小时的风速数据中得出的全球陆上WPD估计值的比较.
- 开发一种校准方法,其中包含一个校正系数,以调整时间分辨率偏差.
- 将校准方法应用于使用SSP585场景对未来风能预测的应用.
主要成果:
- 与每小时数据相比,每日时间分辨率导致全球陆上WPD平均低估35.6%.
- 拟议的校准方法有效地减少了跨时间分辨率的WPD估计偏差.
- 校准预测显示,在SSP585下,到2100年全球陆上WPD估计增加了25%,而非经过校正的每日数据则增加了25%.
结论:
- 精确的WPD评估对于通过风能有效缓解气候变化至关重要.
- 开发的校准方法显著减少了WPD估计的不确定性,提高了它们的可靠性.
- 改进的WPD评估有助于为实现碳中和目标做出更有力的政策决策.
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