Wind Energy Numerical Analysis And Unit Layout Optimization Of Wind Farm

The use of wind energy can be traced back to ancient times.It is one of the earliest energy sources used by human beings.With the development of human society,the demand for energy is becoming more and more huge.The use of wind energy has become an important issue in the modern energy industry.With the development of machinery industry,the design and manufacturing problems of wind turbine have been gradually solved,but the layout of wind turbine has been difficult to solve.Therefore,it is of great significance to carry out wind farm layout optimization research to improve its power generation and stable power output,and then increase economic benefits.This paper takes the wind farm layout optimization method as the research goal,and the main content of the paper is as follows:(1)Based on the original Jensen wake model,combined with the exponential reciprocal formula,the Jensen wake model is modified and optimized for many times,and the Jensen exponential reciprocal wake attenuation model is derived.Firstly,according to the momentum theorem,the turbulence intensity formula of wind is improved,based on which the descending coefficient of wake is derived;secondly,the air loss in the descending process of wake is analyzed,and the calculation deviation of wake caused by considering the air loss is corrected;finally,the exponential reciprocal attenuation formula is used to replace the linear model of the attenuation intensity of wake,and the Jensen exponential reciprocal attenuation formula is obtained Reduced wake model.The mathematical modeling is carried out by programming in MATLAB,and compared with the data of FFA,u-tokyo and ECN wind tunnel experiments,the feasibility of the new wake model is verified.(2)By using the wind resource assessment software wasp,the calculation results of the optimized wind farm layout and the unoptimized one are compared and analyzed,and the characteristics of Voronoi layout optimization method are analyzed.Firstly,according to the characteristics of Voronoi diagram,it is applied to the layout of wind farms,and the layout optimization of wind farms in three cases is carried out.Then,the calculation scene of wind farms is established in wasp,and the wind condition,terrain,wake and other parameters are set up,and the annual power generation and wake loss before and after optimization are calculated.Combined with the characteristics of Voronoi,the rules and original conditions of optimal layout of wind farms are studied Then.The work of this paper is to deduce a new Jensen wake calculation model and verify it by MATLAB,which provides a new calculation method for wind turbine wake calculation;In this paper,Voronoi diagram is introduced,and its characteristics are studied.Combined with the geometric layout method of wind farm,a new layout optimization method Voronoi geometric method is proposed.This method rearranges the layout through several rules,which can avoid wake and improve the power generation of wind farm.It is of great significance to the actual project of wind farm.The feasibility and advantages of Voronoi geometry method are verified by simulation experiments with wasp,a professional wind resource assessment software.