The voltage generated across a zinc‐oxide (ZnO) element, in which a lightning impulse current flows, has been computed with the finite‐difference time‐domain (FDTD) method. Also, the distribution of temperature in the ZnO element has been computed on the basis of FDTD‐computed conduction current densities with a discretized heat equation. The ZnO element having a thickness of 37 mm and a diameter of 34 mm is represented with many 1 mm × 1 mm × 1 mm cubic cells, each of which has a nonlinear resistivity in each of the x, y, and z directions dependent on the electric field in each direction and the temperature in each cell. Waveforms of voltage appearing across the ZnO element and the temperature on the side surface of the ZnO element computed for a short lightning impulse current having a magnitude of 66 kA agree reasonably well with the corresponding measured ones. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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传输线避雷器中的ZnO元件的雷电浪涌电流的电磁和热分析

雷电冲击电流在其中流过的氧化锌（ZnO）元件上产生的电压已通过有限差分时域（FDTD）方法进行了计算。同样，基于FDTD计算的传导电流密度和离散热方程，可以计算出ZnO元件中的温度分布。厚度为37 mm，直径为34 mm的ZnO元件由许多1 mm×1 mm×1 mm的立方晶胞表示，每个立方晶胞在x，y和z中均具有非线性电阻率方向取决于每个方向上的电场和每个单元中的温度。对于大小为66 kA的短雷电冲击电流，计算出的跨过ZnO元件的电压波形和ZnO元件侧面的温度波形与相应的测量值相当吻合。©2021日本电气工程师学会。由Wiley Periodicals LLC发布。