电磁脉冲在地上及地下的传播规律

发布时间：2018-01-02 21:43

本文关键词：电磁脉冲在地上及地下的传播规律　出处：《高压电器》2017年01期 　论文类型：期刊论文

【摘要】：电磁脉冲会在辐照范围内的导体上感应出电压和电流,充分了解电磁脉冲在地上及地下的传播特性及分布规律是评估电磁脉冲效应的必要基础。以高空核爆电磁脉冲为例,采用IEC-61000-2-9—1996中的波形标准,利用傅里叶变换技术计算分析了地上及地下的电场及磁场的水平及垂直分量。结果表明:反射场使地上电磁场的水平分量幅值变小,而使垂直分量幅值变大;由于大地的影响,地下电磁环境异于地上空间,且大地参数对地下电磁场的影响更大,地下电磁场幅值随大地电导率增大而减小,而随大地相对介电常数增大而增大;地下电磁场幅值远小于地上电磁场幅值,尤其是垂直分量在地下衰减很快。
[Abstract]:Electromagnetic pulse in the conductor on the irradiation range should fully understand the current and voltage, electromagnetic pulse on the ground and underground propagation characteristics and distribution law is necessary for the assessment based on electromagnetic pulse effects. At high altitude electromagnetic pulse as an example, using the standard 1996 IEC-61000-2-9 waveform, using Fourier transform technique is analyzed the ground and underground electric field and magnetic field of the horizontal and vertical components. The results show that the amplitude of the reflected field level ground electromagnetic field becomes small, and the vertical component amplitude becomes larger; the earth's influence, the electromagnetic environment is different from the underground space on the ground, and the influence of the earth parameters on the underground electromagnetic field more. Underground electromagnetic field amplitude with earth conductivity decreases, and with the relative dielectric constant increases; the amplitude of the underground electromagnetic field is far less than the ground electromagnetic field amplitude, especially in vertical component The underground attenuates very quickly.

【作者单位】：西安科技大学;国网重庆市电力公司;
【基金】：国家自然科学基金项目(51307137) 西安科技大学青年基金项目(201322)~~
【分类号】：O441
【正文快照】： 0引言高空电磁脉冲(high-altitude electro magnetic pulse,HEMP)是一种强大的电磁干扰源,尤其是E1分量,具有峰值场强极高、频谱分布极宽、作用范围极广等特点,会在其辐照范围之内的金属导体上感应出幅值较高的电压和电流[1-7]。HEMP对地面技术系统,尤其是对电网、油气管网、

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