Wind Farm Field Measurement And Layout Optimization For Wind Power

With the promotion of the 13 th five-year plan,China has increasingly emphasized the development of clean and renewable energy.As a significant clean and renewable energy,wind power generation has attracted more and more attention.In recent years,wind power projects have been booming,and the trend of “going from the mountains to the sea” has become more and more obvious.In the western mountainous area,the complex topography and climate conditions will make the wind field characteristics of the region and the plain area have more distinct differences.Therefore,the wind resource assessment of mountain wind farm,including macroscopic imitative position of wind farm and microscopic imitative position of wind farm,will become more intricate,and the accuracy of its assessment will greatly affect the generation capacity of wind turbines.Another crucial factor affecting the efficiency of wind turbine power generation is the wake effect,and how to optimize the arrangement of wind turbines without improving the construction cost is a vital problem.The specific research content of this thesis is as follows:(1)Based on the measured data of 8 wind towers in mountainous areas of Yunnan province,the wind field characteristics of wind farm areas in mountainous areas are analyzed.According to the theory of wind farm resources assessment,the wind speed in this area is classified and the actual wind resource level of wind farm in the above area is evaluated.(2)The negative exponential wind profile is separated from the measured data of the wind tower and fitted,and the corresponding wind shear index is obtained.In addition,when analyzing the wind direction angle,it is found that there are some differences in space between the average wind direction angle at different heights.(3)In the measured data,three typical wind field types of thunderstorms,heat-driven wind and gale cooling are separated,and the average wind characteristics of these three wind fields are analyzed.(4)Combined with the measured results of wind field in mountainous areas and a typical calculation example of WAsP(The Wind Atlas Analysis and Application Program),the macro site selection and micro site selection process of wind farm are described in detail.(5)Based on Jensen wake model,a method for solving the optimization of fan layout is proposed.Compared with the existing methods without considering the yaw of wind turbines,the optimal fan arrangement obtained by the proposed method has certain advantages in total power generation and unit power generation cost.