指数法在风电场空气密度模拟中的实际应用

利用内蒙古地区65个气象站近30年的气象资料(平均气压、平均气温、平均水汽压、海拔高度),采用指数方程法对空气密度随海拔高度的变化进行模拟估算,得出空气密度与海拔高度的指数关系,并与相关规程中的通用理论公式计算结果进行比较,结果表明:1)海拔高度和空气密度两个变量之间存在显著的指数关系;2)由气象站多年观测记录数据计算得到的空气密度随海拔高度指数方程为ρ=1.287 5λ-0.000 13x,更符合内蒙古地区空气密度随海拔高度的变化。

Practical Application of the Index Method in the Simulation of Air Density in Wind Farms

With the meteorological data （average pressure, average temperature, average vapor pressure, altitude）of the past 30 years in 65 stations on the Inner Mongolia Region, the change of air density with altitude can be estimated with the exponential equation method to obtain the exponential relation ship between the air density and altitude, and the estimation results are compared with the results obtained by the general theoretical formula in other related technical regulations. The study shows： 1 ） there are significant exponential relationships between the altitude and the air density; 2） the exponential equation p=1.287 5λ-0.00013x obtained by calculating of weather station records reflects the change of the air density with altitude in the Inner Mongolia more accurately.