摘要本文对风电场的数值模拟进行了研究。风场模型模拟的关键是风速模型，一个好的风速模型能使模拟更接近于现实情形，组合风速模型将风速分解为基本风、阵风、渐变风、随机风四个分量，能模拟自然风的状态。风力发电中尾流损失占了风能损失的大部分，Jensen尾流模型可以较好地模拟平坦地形中风力机后尾流的变化，Lissaman尾流模型更适用于地表起伏较大的情形。本文采用Jensen尾流模型建立了平坦地形上的简易风场模型。利用Matlab对构建的风场模型进行仿真，得到了风速变化曲线与风机功率曲线，模拟计算结果对风电场的建设可以起到一定的参考作用。63665 

毕业论文关键词： 风场模型；  组合风速；  Jensen尾流模型；  数值模拟

毕业设计说明书（论文）外文摘要

Title    Numerical simulation of wind field in the     applied research of wind power generation          

Abstract Numerical simulation of the wind farm is studied in this paper. The key of wind field simulation is to simulate wind speed. A good wind speed model can make simulation closer to reality. Combined wind speed is decomposed into four components: the basic wind speed, the gust wind speed, the ramp wind speed, the noise wind speed. It can simulate the state of natural wind well. In wind power generation, wake losses accounts for the majority of wind energy loss. In flat terrain, Jensen wake model can better simulate the change of wind turbine wakes. Lissaman wake model is more suitable to the case of undulating surface. In this paper, Jensen wake model is used to build a simple wind field model based on the flat terrain. Wind turbine curve and wind speed curve can be got by using Matlab software to simulate the wind field model. Thus a role of reference is played in the construction of wind farm.

Keywords:  wind field model; combined wind speed; Jensen wake model; numerical simulation

1 绪论 1

1.1 选题背景 1

1.2 风能利用的历史与现状 1

1.3 风场数值模拟现状 4

1.4 本课题的主要内容及目的 5

2 风的形成及特性 8

2.1 风的形成 8

2.2 风力等级及风的尺度 8

2.3 全球性的风及地方性的风 11

2.4  风的特性参数 11

3 风的测量及风能评估 16

3.1 风的测量 16

3.2 风能估计 17

3.3 风能转换 19

3.4 风能资源评估及风电场选址 21

4 风场建模 24

4.1 风速模型 24

4.2 尾流模型 26

4.3 风电场风机模型 31

5 仿真分析 33

5.1 Matlab简介 33

5.2 风速模拟 33

5.3 风场模拟 38

5.4 本章小结 42

结论 44

致  谢 45

参考文献 46