Energy storage inherent in large tidal turbine farms
Energy storage inherent in large tidal turbine farms
复制标题
大型潮汐涡轮发电场固有的储能
DOI：
10.1098/rspa.2013.0580
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
T. Adcock
中科院分区：
文献类型：
--
作者：
R. Vennell;T. Adcock
虽然风力发电场没有固有的存储在平静的条件下供电，本文证明，在渠道的大型潮汐涡轮机农场有短期的能量存储。这种储存存在于振荡流的惯性中，并且可以用于超过先前公布的潮汐通道中电流发电的上限，同时保持更强的电流。惯性存储利用大型农场的能力，通过改变农场的阻力系数来操纵振荡电流的相位。这项工作表明，通过优化如何一个大型农场的阻力系数在潮汐周期的变化，有可能有一些灵活性时，电力生产。这种灵活性可以以多种方式使用，例如产生更多的电力，或者更好地满足需求中的短期可预测峰值。这种灵活性还允许在满足峰值需求的情况下权衡总发电量，或者减轻由于电力提取而导致的流速降低。惯性储能的有效性取决于相对于半潮周期持续时间或电力需求峰值持续时间的摩擦时间尺度，因此在较大的渠道中具有更大的好处。
While wind farms have no inherent storage to supply power in calm conditions, this paper demonstrates that large tidal turbine farms in channels have short-term energy storage. This storage lies in the inertia of the oscillating flow and can be used to exceed the previously published upper limit for power production by currents in a tidal channel, while simultaneously maintaining stronger currents. Inertial storage exploits the ability of large farms to manipulate the phase of the oscillating currents by varying the farm's drag coefficient. This work shows that by optimizing how a large farm's drag coefficient varies during the tidal cycle it is possible to have some flexibility about when power is produced. This flexibility can be used in many ways, e.g. producing more power, or to better meet short predictable peaks in demand. This flexibility also allows trading total power production off against meeting peak demand, or mitigating the flow speed reduction owing to power extraction. The effectiveness of inertial storage is governed by the frictional time scale relative to either the duration of a half tidal cycle or the duration of a peak in power demand, thus has greater benefits in larger channels.