Evaluation of alternative power production efficiency metrics for offshore wind turbines and farms
Evaluation of alternative power production efficiency metrics for offshore wind turbines and farms
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DOI：
10.1016/j.renene.2018.05.050
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发表时间：
2018-12
期刊：
影响因子：
8.7
通讯作者：
B. Niu;Hoon Hwangbo;L. Zeng;Yu Ding
中科院分区：
文献类型：
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作者：
B. Niu;Hoon Hwangbo;L. Zeng;Yu Ding
风力涡轮机的电力生产效率指标的使用对于评估其生产率和量化旨在提高能源生产的措施的有效性非常重要。本研究的目的不是提出一个新的效率指标，因为已经有多个效率指标在实践中广泛使用：可用性，发电比，功率系数。我们在这里的目标是解决这些效率指标彼此之间的相关性或差异性问题。我们认为，解决这个研究问题具有很大的现实意义，因为这是一个问题，从业者往往感到困惑。了解多个效率指标的相似性和差异性，甚至可以为未来提出新的效率指标奠定基础。我们对现有指标是否相互一致的评估是通过使用海上风电场的实际数据来驱动的。我们观察到，这三个指标显示出一定程度的一致性，但发电比，虽然最不受欢迎，似乎更能代表所有指标，更能说明潜在的效率。我们还发现，对于这个特定的风电场，无尾流涡轮机和尾流涡轮机之间的效率差异约为4%。
The use of power production efficiency metrics for wind turbines is important for evaluating their productivity and quantifying the effectiveness of actions that are meant to improve the energy production. The goal of this research is not to propose a new efficiency metric since there are already multiple efficiency metrics widely used in practice: availability, power generation ratio, and power coefficient. Our objective here is to sort out the question of how these efficiency metrics are related to, or different from, one another. We believe addressing this research question has a great degree of practical significance as it is a question practitioners are often puzzled with. Understanding the similarities and differences of multiple efficiency metrics may even lay a foundation for the future proposals of new efficiency metrics. Our evaluation of whether the existing metrics are consistent with each other is driven by the use of actual data from an offshore wind farm. We observe that the three metrics show some degree of consistency but the power generation ratio, albeit the least popular, appears more representative of all metrics and more illustrative of the underlying efficiency. We also found that there is about 4% efficiency difference between wake-free and in-the-wake turbines for this specific wind farm.