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Rated wind speed reality or myth for optimization in design of wind turbines

机译：额定风速现实或神话，以优化风机设计

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摘要

The rotor design procedure of wind turbines starts first with adopting a rated output power and a rated wind speed. There is lack of modelling to determine an optimized rated wind speed and no evidences are observed to suggest the best rated wind speed to produce maximum output power annually. For example in the market of small wind turbines, it is frequently observed that the rated wind speed is taken from small value of 8 m/s to large value of 20 m/s. To examine overall performance of these wind turbines, it is required to develop mathematical models to relate the annual power production of the wind turbines to the given rated wind speeds. By examining power curves of some small European wind turbines from 100 to 900 Watt with constant speed generators, a simplified mathematical model for power curves is introduced and combined with Weibull distribution of wind speeds. Results of the model based on a capacity factor are presented versus the rated wind speed using wind characteristics of an optional region. It is observed that between the cut-in and cut-out wind speeds, there is an optimum rated wind speed above which the annual output power production of the wind turbine remains unchanged.
机译：风力涡轮机的转子设计程序首先从采用额定输出功率和额定风速开始。缺乏确定最佳额定风速的模型，也没有观察到证据表明最佳额定风速可以每年产生最大输出功率。例如，在小型风力涡轮机的市场中，经常观察到额定风速是从8 m / s的小值到20 m / s的大值。为了检查这些风力涡轮机的整体性能，需要开发数学模型以将风力涡轮机的年发电量与给定的额定风速相关联。通过检查一些带有恒速发电机的100至900瓦的小型欧洲风力涡轮机的功率曲线，引入了功率曲线的简化数学模型，并将其与风速的Weibull分布相结合。使用可选区域的风特征，根据容量因子给出了模型结果与额定风速的关系。可以看出，在切入风速和切出风速之间，存在一个最佳额定风速，高于该额定风速时，风力涡轮机的年输出功率将保持不变。

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