电子电力系统是国家重要基础设施，线缆作为系统中传输信息及能量的媒质，大部分暴露在外界自然环境中，极易受到强电磁脉冲干扰产生强大的瞬态感应电流，并通过耦合进入电子电力系统内部造成设备损害。因此，研究强电磁脉冲环境与各类传输线缆的耦合效应对当前电子电力系统的电磁防护具有重要意义。

针对强电磁脉冲环境下有耗半空间中的线缆，提出了一种将反射系数法与时域积分方程（TDIE）方法结合求解强电磁脉冲与各类传输线缆耦合效应的时域方法。首先采用反射系数法，获取有耗地面反射波到达线缆的时域响应，然后把这部分的反射波作为入射波激励源的一部分，加入到TDIE方法的求解中，建立单根架空线缆的时域电场积分方程；进而扩展得到不同媒质情况下多线缆、分层地面上方线缆以及埋地线缆的积分方程，通过时域矩量法（TD-MOM）快速求解；最后利用混合算法为架空线天线精确建模，计算了线天线受时变电压源激励后的瞬态响应。在此基础上，分析了不同线缆长度、架设高度及入射波极化状态条件下架空线缆的感应电流变化规律，讨论了影响细线天线中点瞬态电流的因素。考虑实际的电力传输线长度很长且在一定程度上可以看成是周期结构，采用基于无限-周期结构理论的TDIE方法，建立强电磁脉冲对实际超长细线导体耦合模型，解决了在利用TDIE方法或时域有限差分（FDTD）方法模拟地面上方线缆结构时，由于计算资源有限能够仿真的线缆长度常常受到限制的问题。

仿真结果表明，将反射系数法与TDIE方法结合求解强电磁脉冲环境下各类传输线缆耦合响应，相比传统时域反射系数法或全波方法，本文混合时域算法计算结果精确合理。针对超长线缆瞬态电流的计算，通过与TDIE方法对比，基于无限-周期结构理论的TDIE数值方法更高效，复杂度降低一半，并计算内存消耗较低。研究成果对提高电子电力系统的抗干扰方面具有重要意义。

The electronic power system is an important national infrastructure, cables are used as the medium for transmitting information and energy in the system. Most of transmission cables are exposed to the external natural environment, and they are extremely susceptible to strong electromagnetic pulse interference to generate strong transient induced currents, and cause equipment damage through coupling into the electronic power system. Therefore, studying the coupling effect of strong electromagnetic pulse environment and various transmission cables is of great significance to the electromagnetic protection of current electronic power systems.

For cables in lossy half space under strong electromagnetic pulse environment, a method combining the reflection coefficient method and the time domain integral equation (TDIE) method to solve the coupling effect of the strong electromagnetic pulse and various transmission cables is proposed Time domain method. First, the reflection coefficient method is used to obtain the time domain response of the lossy ground reflected wave reaching the cable, and then this part of the reflected wave is used as a part of the incident wave excitation source, added to the solution of the TDIE method to establish the integral equation of the electric field in the time domain of the single overhead line. Then, the integral equations of the multi-cable, the cable above the layered ground and the buried cable under different media conditions are expanded, and the time domain method of moments (TD-MOM) is used to quickly solve. The last, this thesis uses the hybrid algorithm accurately models the overhead line antenna and calculates the transient response of the line antenna after being excited by a time-varying voltage source. On this basis, the induced current changes of overhead cables under different cable lengths, erection heights and polarization states of incident waves are analyzed, and the factors affecting the transient current at the midpoint of the thin wire antenna are discussed. Considering that the length of the actual power transmission line is very long and can be regarded as a periodic structure to a certain extent, the TDIE method based on the infinite-periodic structure theory is used to establish a coupling model of strong electromagnetic pulses to the actual ultra-long thin wire conductor, which solves the problem of using TDIE method or finite-difference time domain (FDTD) method is used to simulate the cable structure above the ground, the length of the cable that can be simulated is often limited due to the limited computing resources.

The simulation results show that the reflection coefficient method and the TDIE method are combined to solve the coupling response of various transmission cables in the strong electromagnetic pulse environment. Compared with the traditional time domain reflection coefficient method and the full wave method, the calculation results of the hybrid time domain algorithm in this thesis are accurate and higher efficiency. For the calculation of the transient current of ultra-long cables, compared with the TDIE method, the TDIE numerical method based on the infinite-periodic structure theory is more efficient, the complexity is reduced by half, and the calculation memory consumption is lower. The research results are of great significance for improving the anti-interference of electronic power systems.