Response of Overhead Cables to Low-Altitude Nuclear Electromagnetic Pulse

IF 1.9 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Nuclear Science Pub Date : 2025-03-14 DOI:10.1109/TNS.2025.3551326

Zhaomin Li;Jiarong Dong;Bing Wei;Xinbo He;Hui Chen

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引用次数: 0

Abstract

The coupling characteristics of overhead wires under high-altitude nuclear electromagnetic pulse (HEMP) have been extensively studied. However, the effects of low-altitude nuclear electromagnetic pulse (NEMP) on the field values at observation points vary with explosion height, yield, and ground medium, and the coupling characteristics of overhead wires under low-altitude NEMP remain unresolved. To address this issue, this article proposes a solution. First, the finite-difference time-domain (FDTD) method is employed within a rotated ellipsoidal-hyperbolic orthogonal coordinate system to solve Maxwell’s equations and the air ionization equation, thus obtaining the source field at the location of the overhead wires. Subsequently, these results are used as an excitation source to calculate the response characteristics of the overhead wires with terminal loads using transmission line methods. Finally, the impacts of factors such as explosive yield, altitude, ground conductivity, terminal impedance, and cable height on the terminal induced current of overhead wires located at the edge of the source region under low-altitude NEMP incidence are analyzed. This study provides theoretical support and reference value for the protective design of power systems.

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架空电缆对低空核电磁脉冲的响应

高空核电磁脉冲作用下架空导线的耦合特性得到了广泛的研究。然而，低空核电磁脉冲（NEMP）对观测点场值的影响随爆炸高度、当量和地面介质的不同而不同，低空核电磁脉冲作用下架空导线的耦合特性尚未得到解决。为了解决这个问题，本文提出了一个解决方案。首先，在旋转椭球-双曲正交坐标系下，利用时域有限差分（FDTD）方法求解麦克斯韦方程组和空气电离方程，得到架空导线位置的源场；随后，将这些结果作为激励源，利用传输线法计算带终端负载的架空导线的响应特性。最后，分析了低空NEMP作用下，爆炸当量、海拔高度、接地电导率、终端阻抗、电缆高度等因素对震源区边缘架空导线终端感应电流的影响。本研究为电力系统的保护设计提供了理论支持和参考价值。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Nuclear Science 工程技术-工程：电子与电气

CiteScore

3.70

自引率

27.80%

发文量

314

审稿时长

6.2 months

期刊介绍： The IEEE Transactions on Nuclear Science is a publication of the IEEE Nuclear and Plasma Sciences Society. It is viewed as the primary source of technical information in many of the areas it covers. As judged by JCR impact factor, TNS consistently ranks in the top five journals in the category of Nuclear Science & Technology. It has one of the higher immediacy indices, indicating that the information it publishes is viewed as timely, and has a relatively long citation half-life, indicating that the published information also is viewed as valuable for a number of years. The IEEE Transactions on Nuclear Science is published bimonthly. Its scope includes all aspects of the theory and application of nuclear science and engineering. It focuses on instrumentation for the detection and measurement of ionizing radiation; particle accelerators and their controls; nuclear medicine and its application; effects of radiation on materials, components, and systems; reactor instrumentation and controls; and measurement of radiation in space.