Analysis And Assessment Of Wind Energy Resources Under Complex Terrain

The analysis and assessment of wind energy resources are of great significance to the rational planning and construction of wind farms.They are the technical basis of the process of equipment selection and economic analysis in the later period,and are related to the project establishment,equipment selection and economic analysis of wind farms.Wind speed distribution curve is an important means to judge wind energy resources.Weibull distribution is often used in engineering to estimate some important parameters of wind energy resources in wind farms.The purpose of this paper is to provide a technical basis for the assessment of wind energy resources in China in order to make better use of wind energy resources.WAsP software is currently the most commonly used wind energy resource assessment software.This software works well in flat terrain conditions in Europe,but deviates more from the complex terrains.However,wind-resource-rich areas in China usually have many complex and varied terrains such as hills and valleys.Therefore,this paper studies the analysis and assessment of wind energy resources under complex terrains.This paper studies the typical wind resource analysis and evaluation methods and their characteristics,and analyzes the main functional structure of the wind energy assessment system.Construct a framework of wind energy resource evaluation system composed of main modules,data management,system settings,data analysis and economic analysis.The wind data analysis and wind power estimation module are designed to realize the data analysis of wind speed variation,wind direction frequency,wind direction density and annual effective wind resource.In the assessment system,the method of economic analysis of wind field is added,and the main program structure of wind energy system is established to ensure the effective operation of the wind energy assessment system.In view of the effects of environmental flow field,underlying surface characteristics and near-surface physical processes on the airflow distribution factors of complex terrains,the wind energy resource assessment method based on static model is studied.In order to reduce the influence of the flow around the accuracy of the assessment results,a horizontal equation of motion is introduced into the static model to improve the accuracy of the calculation results of the assessment model.In this paper,the ideal 3D mountain is used as the object of simulation calculation.The effectiveness of the proposed method is verified by comparing wind energy assessment results of different algorithms.Taking the site selection and arrangement of wind farms under the actual complex terrains as the research object,the framework of wind farm site selection calculation method is designed.By analyzing the regional wind resources,the macro-site selection and micro-site selection of wind farms respectively.By comparing the power generation capacity.And economy of the optimized wind farms,the correctness of the proposed wind power assessment method is further verified.