摘要
Wait算法可用来计算电磁场传播,计算距离达数百至上千千米。本文提出一种新的解析算法来近似Wait算法,以简化计算过程。基于二维柱坐标时域有限差分(2D-FDTD)模型对近似算法进行评估,发现此算法可用于计算远距离电场衰减,在1 500 km范围内相对误差不超过7%。在计算磁场衰减时,计算距离越远,精度越差,距离为1000 km时两算法误差已达到15%。通过绘制相对误差曲线,便于人们在考虑的误差范围内选择,是否采用本算法来简化计算。
Wait algorithm can be used to calculate transformation of electromagnetic field and the length of calculation is up to thousands of kilometers. Aiming at simplifying the calculation, a new analysis formula is proposed to substitute the Wait formula. The attenuation of electric field for long distance can be calculated according to the evaluation to this new formula based on 2 D-FDTD model. And it can be found that the error is less than 7% in 1 500 km. The precision will be inaccurate as the increase of length when calculating the magnetic field. The error value can reach 15% when the length is 1 000 km. By plotting the error curve, people can decide to whether choose this formula in consideration of error range.
作者
王烁
王磊
梁仕斌
肖开伟
刘明
WANG Shuo;WANG Lei;LIANG Shibin;XIAO Kaiwei;LIU Ming(Yunnan Electric Power Test ＆ Research Institute（Group）Co.,Ltd,Kunming 650217)
出处
《云南电力技术》
2018年第3期89-93,108,共6页
Yunnan Electric Power
