Meteorologically defined limits to reduction in the variability of outputs from a coupled wind farm system in the Central US

RENEWABLE ENERGY

卷:62

Article

Huang, Junling¹  Lu, Xi¹  McElroy, Michael B.^1,2 

[1] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA

[2] Harvard Univ, Dept Earth & Planetary Sci, Cambridge, MA 02138 USA

关键词: Interconnection;    Transient waves;    Meteorologically defined limits;   

DOI  :  10.1016/j.renene.2013.07.022

来源: Elsevier

【 摘 要 】

Studies suggest that onshore wind resources in the contiguous US could readily accommodate present and anticipated future US demand for electricity. The problem with the output from a single wind farm located in any particular region is that it is variable on time scales ranging from minutes to days posing difficulties for incorporating relevant outputs into an integrated power system. The high frequency (shorter than once per day) variability of contributions from individual wind farms is determined mainly by locally generated small scale boundary layer. The low frequency variability (longer than once per day) is associated with the passage of transient waves in the atmosphere with a characteristic time scale of several days. Using 5 years of assimilated wind data, we show that the high frequency variability of wind-generated power can be significantly reduced by coupling outputs from 5 to 10 wind farms distributed uniformly over a ten state region of the Central US in this study. More than 95% of the remaining variability of the coupled system is concentrated at time scales longer than a day, allowing operators to take advantage of multi-day weather forecasts in scheduling projected contributions from wind. (C) 2013 Elsevier Ltd. All rights reserved.

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