电波科学学报2017，Vol.32Issue(2)：125-133,9.DOI:10.13443/j.cjors.2017021501
一种改进的远距离地闪回击电磁场计算方法
An improved method for calculating electromagnetic field in long distance radiated from lighting return stroke
王烁 1张其林 1王磊 2梁仕斌 2周懋坤 3张雪峰3
作者信息
- 1. 南京信息工程大学 气象灾害教育部重点实验室,南京 210044
- 2. 云南电力试验研究院(集团)有限公司,昆明 650217
- 3. 昆明供电局,昆明 650011
- 折叠
摘要
Abstract
In this paper, an improved analytical algorithm is proposed to calculate the long-distance electromagnetic field radiated from lightning return stroke.Based on the long-distance ideal electromagnetic field attenuation algorithm and the near-distance electromagnetic field attenuation algorithm, the curvature attenuation factor proposed by W.Sollfery is combined with the conductivity attenuation factor proposed by Wait.The two decay factors are convoluted twice by the ideal field to obtain the actual attenuation electromagnetic field in purpose of simplifying the calculation.The finite-difference time-domain is used to evaluate the algorithm.Results show that the error of the attenuation electric field is less than 7% in 1 500 km;while when calculating the magnetic field, the precision is inaccurate as the increase of length, and the error value can reach 15% when the length is 1 000 km.We plots the error curve, which can help people to consider the error range and decide to choose this formula or not.关键词
解析算法/曲率衰减因子/电导率衰减因子/时域有限差分模型/相对误差Key words
analytical algorithm/the curvature attenuation factor/the conductivity attenuation factor/finite-difference time-domain model/relative error分类
信息技术与安全科学引用本文复制引用
王烁,张其林,王磊,梁仕斌,周懋坤,张雪峰..一种改进的远距离地闪回击电磁场计算方法[J].电波科学学报,2017,32(2):125-133,9.
