The spectrum of power from wind turbines
The spectrum of power from wind turbines
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DOI：
10.1016/j.jpowsour.2007.02.077
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发表时间：
2007-06-20
影响因子：
9.2
通讯作者：
Apt, Jay
中科院分区：
文献类型：
--
作者：
Apt, Jay
风力涡轮机的输出的功率谱密度提供了关于涡轮机输出的波动特征的信息。在这里，1秒和1小时的样本被用来估计几个风电场的功率谱。测量的输出功率被发现遵循Kolmogorov频谱超过四个数量级，从30秒到2.6天。这一结果与50年前发表的唯一一项长期研究形成鲜明对比。该频谱定义了必须提供的填充功率的特性，以补偿风在大规模部署时的波动。安装足够的线性斜坡率发电（例如气体发生器）以填充幅度为最大波动的1%的快速波动，对于较慢的波动，将使填充发电容量过大两倍，从而大大增加资本成本。结合电池、燃料电池、超级电容器或其他快速斜坡率能量存储系统的风力系统将更好地匹配波动，并且当可再生能源组合标准需要大量间歇性可再生能源时，可以为能量存储系统的部署提供经济途径。(c)2007 Elsevier B.V.保留所有权利。
The power spectral density of the output of wind turbines provides information on the character of fluctuations in turbine output. Here both 1-second and 1-hour samples are used to estimate the power spectrum of several wind farms. The measured output power is found to follow a Kolmogorov spectrum over more than four orders of magnitude, from 30 s to 2.6 days. This result is in sharp contrast to the only previous study covering long time periods, published 50 years ago. The spectrum defines the character of fill-in power that must be provided to compensate for wind's fluctuations when wind is deployed at large scale. Installing enough linear ramp rate generation (such as a gas generator) to fill in fast fluctuations with amplitudes of 1% of the maximum fluctuation would oversize the fill-in generation capacity by a factor of two for slower fluctuations, greatly increasing capital costs. A wind system that incorporates batteries, fuel cells, supercapacitors, or other fast-ramp-rate energy storage systems would match fluctuations much better, and can provide an economic route for deployment of energy storage systems when renewable portfolio standards require large amounts of intermittent renewable generating sources. (c) 2007 Elsevier B.V. All rights reserved.