风资源评估方法研究1

内蒙古工业大学

硕士学位论文

风资源评估方法研究

姓名：李常春

申请学位级别：硕士专业：动力机械及工程指导教师：刘志璋

20060601

摘要

针对我国大型风电场建设起步相对较晚，风能资源的测量评估依据不够充分，评估所用的资料大都是10米高度处的气象站资料。部分气象站由于周围建筑环境的影响使测量数据严重失真，给风电场的选址和规划方面带来很多困难。为此作者进行了风资源评估方法的研究。

本论文介绍了有关风资源的基本概念、风的变化和风的统计特性；从风电场测风的角度出发，分析了风资源测量站址的选择方法、测量参数分析及设备安装原则等。

在实际风电场测风的基础上，本论文运用WASP软件整合数据，提出了采用NASA （美国国家航空航天局）数据库中的风资料与瑞利概率密度函数相结合的方法，来拟合风速频率分布，评估当地风资源。作者利用锡林浩特风电场实测的一年数据和百灵庙的实测数据对新方法的准确度进行了验证。得到了如下结论：

（1）论文提出的风资源评估的新方法，采用NASA数据库中的风资料数据计算风速分布频率的结果与实测一年的当地风资源数据计算结果的差值在±10%以内。

（2）本文提出的风资源评估的新方法和相关理论分析及应用技术能够指导当前的风电场的选址工作。

为了更好的开展本课题的后续工作，作者提出如下建议：

（1）在测风塔安装的多层风速仪中，一定要安装50米高度处的风速仪，为进一步修正新方法的估计精度打好基础。

（2）本课题的提出的研究方法并未考虑地形地貌的影响，建议下一步研究中利用电子地图提高计算准确性。

（3）基于本课题的方法，进一步规划内蒙古自治区和我国的风能资源分布情况。关键词：风资源；NASA数据；瑞利分布函数；风速频率分布；评估

Abstrct

It is difficult to select the site of the wind farm or to assess the wind rescoure in our country. There are some reasons. First, the construction of the large-scale wind farm in our country is relatively late. Second, it is not abundant enough to assess the wind resources according to 10-meter’s wind speed at meteorological stations. Otherwise, some meteorological stations was built with other buildings around. This makes the measurement datum distorted seriously. So the author has carried on the research of the wind resource assessment.

In this thesis, the basic thoery of wind is elaborated, inculding the basic conceptions, the changes of the wind and the statistics characteristic of the wind resources. At the same time, it is analyzed in detail that the method of siting a palace to messture the wind resource, measure parameter analysis and the install principle.

On the basis of the actual messurement of wind farm, WASP software was used to deal with the datum. The author has put forward the method that the wind database of NASA (American National Aeronautics and Space Administration ) combine with Rayleigh function. So the wind speed probability distribution can be obtained in this place , and then assessed wind resources in this place. The author verified the accuracy of the new method through utilizing the datum of the wind farm of Xilin Hot and the datum of Bailingmiao. It comes to the following conclusions:

(1) The difference of the result between the new method to assesse the wind resource and the calculation according to measurement datum of the local wind for one year is about ±10%.

(2) The wind measure of the wind farm is very important. This thesis can offer relevant theory analysis and technical support for this.

And on the follow-up study of this subject , there are the following suggestions:

(1) In the multi-layer wind tower , an anemometer at 50 meters’ must be install, in order to improve the precision of assessment of the new method further.

(2) The method deos not considered the influence of the topographical ground form, so it is hoped to get support from electronic map in next research to perfect this research approach.

(3) On the basis of the new method of this thesis, the wind energy resource distribution situation which we can plan to appear in Inner Mongoulia and our country .

Key words:Wind resources; NASA data; Rayleigh function; Wind speed frequency distribution; Assessment