Temporal and spatial characteristics of offshore wind resources

doi:10.16511/j.cnki.qhdxxb.2016.25.011

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Abstract Offshore wind energy resources are more abundant than on land. However, sea and land winds have different meteorological elements so offshore wind resource assessments need to take the impact of the temporal and spatial characteristics of the offshore wind resources into consideration. Data from an offshore wind measurement mast was used to study offshore wind distributions at different time scales. The EM (expectation-maximization) algorithm was used to study the differences in offshore wind distributions between day and night, which is normally not considered in traditional wind assessment methods. The spatial characteristics of offshore winds will than analyzing using a machine learning algorithm, Monin-Obukhov similarity theory, and a parameter replacement scheme in discrete calculations and in an ocean surface aerodynamic roughness model. This method efficiently reflects the impact of ocean surface aerodynamic roughness changes on the vertical variations of the wind speed that is not considered in traditional wind shear formula. The results show the temporal and spatial characteristics of the offshore wind resources as a basis for better offshore wind assessments for planning offshore wind farms.

Keywords wind energy offshore wind resource temporal and spatial characteristics wind resource assessment Monin-Obukhov similarity theory surface aerodynamic roughness

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TK81

Issue Date: 15 May 2016

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	FENG Yu
	HE Yan
	ZHU Qihao
	GUO Chen
	FENG Xiaodan
	HUANG Biqing

Cite this article:

FENG Yu,HE Yan,ZHU Qihao, et al. Temporal and spatial characteristics of offshore wind resources[J]. Journal of Tsinghua University(Science and Technology), 2016, 56(5): 522-529.

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http://jst.tsinghuajournals.com/EN/10.16511/j.cnki.qhdxxb.2016.25.011 OR http://jst.tsinghuajournals.com/EN/Y2016/V56/I5/522

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