摘要
Abstract
The quality of wind farm site selection is closely related to the accuracy of wind energy resource assessment,determining the success or failure of wind power projects.This paper provides an overview of several key issues encountered by wind farms in site selection,wind measurement schemes,data analysis,and model calculation from the perspective of engineering practice.Taking a wind farm in Guizhou Province,which is located in a complex terrain,as an example,a post evaluation is conducted to analyze the differences between the theoretically calculated and actual power generation,as well as the reasons for the differences.The results show that:1)In terms of site selection,with the help of high-precision wind energy resource maps,areas with relatively good resources are selected as potential planning areas by overlaying land use status maps,ecological red line range maps,and other methods.Then,through on-site investigation,restricted areas are eliminated.2)In terms of wind measurement plan,there should be sufficient number of wind measurement towers and sufficient wind measurement time,and the installation location of wind measurement towers should cover the diverse terrain conditions in the site area as much as possible.3)In terms of data analysis,multiple fitting methods can be used for interpolation of wind measurement data,comparing the changes in wind speed and Weibull distribution after interpolation to minimize calculation errors caused by the lack of wind measurement data.4)In terms of model calculation,it is necessary to first verify whether the position of the wind measurement tower on the digital terrain map matches the actual terrain.Depending on the complexity of the terrain and surface characteristics of the project location,suitable calculation models should be selected.For offshore wind power projects and onshore large-scale base wind power projects,the applicability of the wake model and the value of the wake attenuation constant should be emphasized.5)In terms of post evaluation of wind farms,conducting post evaluation based on wind energy resource assessment to identify factors that lead to differences between the actual and designed power generation of wind farms during operation can help reduce errors in the design phase of wind farms in the future.In the hope that this study can provide reference for the selection of wind measurement towers and wind energy resource assessment in subsequent wind farms.关键词
风电场/选址/风能资源评估/后评价Key words
wind farms/site selection/wind energy resource assessment/post evaluation分类
能源科技
