Research On Measurement And Visualization Of High-altitude Wind Field

With the continuous development of society and technology,people’s needs for understanding the conditions of the wind farm are becoming more and more diverse,and new requirements are put forward for the measurement methods and equipment of wind field.At the same time,there are many types of measured data,huge data volume,and it is difficult to understand.How to improve the efficiency of storage management,optimize the expression of data and many other issues have also attracted extensive attention of scholars.Based on the above problems,this article did the following research work:First of all,the paper introduces the characteristics of BIM technology in detail,as well as the relevant operation environment,theoretical knowledge and development software for the secondary development based on BIM technology.At the same time,the database-related theories are introduced,and the SQL Server software is used to complete the construction of the database to prepare for the information management of the subsequent measured data.Secondly,a new method for measuring wind speed and direction using multi-rotor unmanned aerial vehicle(UAV)equipped with anemometer is studied.The comparison between the measured data of UAV and the data of wind tower shows that the measurement error will be caused by the tilt of UAV fuselage when hovering.The average wind speed measured by UAV is larger than that measured by wind tower,and the error of the average wind speed can be largely eliminated by the inclination angle correction.The installation error of anemometer results in large error of X-component and Y-component wind speed,and the error of component corrected is significantly reduced by wind direction.The turbulence data measured by UAV will be larger due to the adjustment of UAV flight attitude,and the turbulence can be reduced to a certain extent by moving average processing.Thirdly,using UAV wind measurement technology and uniform design method,the field measurement and wind field fitting of plane wind field over a test base area are completed.By defining the ratio C of measured wind field data of UAV and wind tower,the influence degree of complex landform around the wind tower on the wind field can be reflected.By using the ratio C and the data of wind tower,the wind field conditions at different measuring points can be inferred.On the other hand,the uniform design method can greatly reduce the number of tests and the process of data processing.By using the measured results of the simplified test scheme,the plane wind field can be built by fitting equations.The fitting results can better reflect the trend of the whole wind field,and the overall accuracy is better.Finally,the secondary development of BIM was used to build a high-altitude wind field measured information management system to realize the information management of the measured data.Through the management function of the measured data of the wind farm,many operations such as the import and update of the measured data,data query and data processing are realized,which improves the data security and data processing efficiency.At the same time,the three-dimensional visualization advantage of BIM technology is used to realize the linkage between the wind field parameters and the measured field,and the relationship between the measured terrain and the wind field parameters is intuitively expressed,so that the measured results are easy to understand and apply.