测风数据不同时间尺度对风电场产能评估的影响

Influence of Different Time-Scale in Wind Measurement Data on Productivity Evaluation of the Wind Farm

风资源状况模拟的准确度主要体现在测风数据时间间隔上。以淮安某风电场测风塔一年及以上每10 min的测风数据为基准,对不同时间间隔(30 min、1 h、2 h)所记录的测风数据分别应用最小二乘法、平均风速和标准差估计法及极大似然估计法求解风速概率分布进行产能评估,对不同时间间隔下计算所得的发电量进行误差对比。结果指出,风电场发电量估计误差随着时间尺度增大而增大,采取30 min时间间隔测风数据计算出的发电量与10 min实测数据计算结果更为接近,当风电场选址区域的测风数据完整性较差时,研究结果具有一定指导作用。

The accuracy of state stimulation of the wind resource condition mainly reflects in the time interval of the wind measurement data.This research obtained the wind measurement data per 10 min of the anemometer tower of the wind farm in Huai'an for more than one year.In ad-dition,it used the least square method,average wind speed,standard deviation estimation method,and maximum likelihood estimation to evaluate the recorded data of the time interval(30 min/1 h/2 h),solve wind speed probability distribution,conduct the productivity evaluation,and compare estimation errors of generating capacity in the different time interval.The result shows that the estimation error of the generating capacity enlarges with the time-scale increasing.The generating capacity calculated by the wind measurement data per 30 min is close to the computed result of the data per 10 min.All in all,the result has instructional functions when the wind measurement data of the wind farm has poor integrity.