风电场代表年订正方法研究

Research on the Revision Method of Wind Farm Representative Year

风资源评估中,代表年风速的计算十分重要。常规方法一般是首先计算气象站与测风塔风速的线性相关性,然后据此进行修订。然而在实际工程中,由于受到地形、距离等因素的影响,许多风场与气象站的相关性较差,订正后会得到错误的结论。针对这种情况,将水文中常用的频率分析引入到代表年风速计算中,以山东某风电场为例,计算结果表明:该方法结果与常规方法相差不大且避免了相关性差带来的弊端,为风速订正提供了一种新的思路。

In the wind resources assessment,it is very important to get the representative wind speed.The conventional method is generally to first calculate the linear correlation between the wind speed of the weather station and the wind tower,and then revise it accordingly.However,in actual engineering,due to the influence of terrain,distance and other factors,the correlation between many wind fields and weather stations is poor,and wrong conclusions will be obtained after correction.In view of this situation,this paper introduces the frequency analysis commonly used in hydrology into the calculation of representative annual wind speed.Taking a wind farm in Shandong Province as an example,the calculation results show that the results of this method are not much different from those of the conventional method and avoid the problems caused by poor correlation which provides a new idea for wind speed correction.