کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
293226 511121 2012 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Wind speed modelling using Weierstrass function fitted by a genetic algorithm
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Wind speed modelling using Weierstrass function fitted by a genetic algorithm
چکیده انگلیسی

In this paper a wind speed model as a time series is presented. The main goal is to use it as a model of the load of wind turbine gears for simulation of real, varying operational conditions for wind turbine vibration modelling. Several wind characteristics for evaluation of the wind model accuracy in the context of a wind turbine gears load simulation are proposed. Verification of the hypothesis that wind speed as a time series has a fractal character is another aim of this paper. The Weierstrass functions family, whose graphs are fractal sets, in combination with medium-term trends, is used as the basis of the model. The function with a fractal component is fitted to the past observation data. A genetic algorithm is used as the fitting procedure. Fractal dimension is utilized as a parameter in a fitness function. The results have shown that the proposed approach yielded very good fit for the observation data. The hypothesis about fractal character of the wind speed is positively verified.


► A new model of wind speed as a time series is proposed.
► The chaotic character of the wind speed variability is taken into consideration.
► Parameters describing chaotic speed variability are used in the model validation
► The parameters of the model are fitted by a genetic algorithm.
► The model yielded very good fit for the observation data.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Wind Engineering and Industrial Aerodynamics - Volume 109, October 2012, Pages 68–78
نویسندگان
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