基于气象典型年的电力线路通道气温环境数据生成方法及结果分析

Developing Meteorological Data over the Electronic Power Lines Based on Meteorological Typical Year

电力线路通道周围的气温环境数据是线路架设的重要工程参数。本文基于TAPM动力模式和气温综合分析法结合,生成浙江省电力线路通道周边气温环境数据并开展分析。研究结果显示基于综合分析法对动力模式结果进一步降尺度得到的气温较动力模式直接模拟准确性提高明显,偏差基本呈正态分布,偏差分布在-4℃至4℃之间,80%的站点偏差在±2℃内。气温计算误差随着海拔的升高而增加,但在高海拔区域的平均误差仍然能保持在1.1℃以内,取得了较好的降尺度效应。模式动力降尺度受驱动资料强迫较强,对数据在时间上的降尺度能力有限。综合分析法对日平均气温、日最高气温和日最低气温均给出了切合实际的结果,并给出了更为合理的日循环变化。

In this study,a new interpolation method named Comprehensive Analysis method(IN)is used to reproduce the high resolution air temperature data beyond the electricity network in Zhejiang province.The results show that the accuracy of the Comprehensive Analysis method is higher than the dynamic model downscaling with coarse resolution.The deviation is between-4℃and 4℃,80%Site deviation within±2℃.The error of air temperature increases with the increase of altitude,but the average error in the high altitude area can still be kept within 1.1℃,and the better scale effect is achieved.The dynamic model downscaling is strongly forced by the drive data,and the ability of the data to be downscaling in time variation is limited.The Comprehensive analysis method gives practical results for daily mean temperature,daily maximum temperature and daily minimum temperature,and gives a more reasonable daily cycle change.