Scheme Design And Performance Study Of Shipborne Lidar Wind Measuring System

In December 2016,the “13th Five-Year Plan for Renewable Energy Development” issued by the National Development and Reform Commission pointed out: By 2020,the construction scale of China's offshore wind power will begin at 10 GW.The development prospects of the offshore wind power industry are considerable,and they are gradually moving towards large-scale and far-reaching maritime development.Offshore wind power has high investment costs,operating costs and risks.The situation of offshore wind resources directly determines the benefits of future offshore wind farms.The traditional technology of offshore wind towers can not meet the requirements of industry development.A series of problems such as the micro-location of offshore wind farms,the determination of wind power curves,and wake observations are still not well resolved.This article proposes a plan for wind measurement by shipborne laser radar,which can well adapt to the development of the industry.And the technical difficulties existed in this technology were studied.This article mainly studies the following aspects:1?Through literature readings,the development status of offshore wind power in China and the current status of global offshore wind power are described.The current status of offshore wind resource assessment in China and the current status of laser wind measurement radar development in China are introduced.The development status of foreign floating laser radar wind measurement solutions is shown.The research status of wind measurement performance,the research status of motion compensation theory of floating lidar wind measurement solutions at home and abroad.2?Designing ship lidar wind measurement program and Studying on follow-up of the market demand;specifically include: laser radar,inertial navigation,ship platform comparison and selection of research and manufacturer research;follow-up test equipment selection and preparation.Initial test equipment selected for wind operation vessel,SMC attitude instrument,Molas B300 lidar.Finally,the specific equipment is confirmed,which provides a reference for the subsequent application to offshore wind power projects.3?Theoretical analysis and performance calculation of hydrodynamic operation and maintenance of vessels(frequency domain and time domain).Including the establishment of a hydrodynamic model for wind power operation and maintenance;selection of target sea area;calculation of hydrodynamic parameters;time-domain coupling analysis of wind power operation and maintenance ship;The onboard laser lidar wind test performance verification test provides reference for test conditions.Through the calculation of hydrodynamic performance,the wind power operation and maintenance vessel has a good hydrodynamic performance and meets industry standards in the motion response values of roll,pitch and heave.4 ? Designing the shipborne lidar performance test,including: the choice of test equipment,test time,site selection;commissioning of test equipment(including the commissioning of laser radar,SMC attitude data acquisition and debugging,three degrees of freedom platform motion debugging,In particular,including the use of cold water system);acquisition of laser radar data;data processing program preparation(matlab program);linear regression analysis of experimental data;experimental data analysis.Finally,we can conclude that the attitude angle will change the accuracy of the laser radar's wind measurement,and its effect on the wind speed is less than that on the wind direction.The attitude angle has a great influence on the vertical wind speed.The influence of dynamic attitude angle on the accuracy of Lidar wind measurement is relatively stable.The influence of static attitude angle on the accuracy of lidar wind measurement is uncertain.5 ? Studying on the error of lidar and the principle of wind measurement by lidar,analysing the error caused by lidar,studying on the motion compensation theory of lidar,and by applying the theory of space geometry and Euler method Coordinate transformation theory,summed up a set of two lidar wind speed relationship between the motion compensation.It provides the theoretical basis and reference for the theoretical research of the following motion compensation algorithm.Through the study of this chapter,the motion errors of lidar are divided into four categories,and finally a theoretical formula that can be used in the motion compensation algorithm is given.