This paper offers a simulation study on the application of a novel approach to control the electric field around a basin-type spacer by combining permittivity functionally graded materials (ε-FGM) and superficially non-linear conductivity materials (SNCM), namely multi-dimensional functional materials (MDFM). The permittivity distribution of the ε-FGM spacer is designed by the iteration optimization algorithm, and the epoxy/SiC composites with 30 and 60 phr doping contents are assigned as the coating materials of two SNCM spacers, namely SNCM30 and SNCM60. The MDFM spacer combines ε-FGM in its bulk and SNCM60 on its surface. The electric field regulation effect of each functional spacer is investigated under variable conditions, that is, DC steady state (DC-steady), DC turn-on state (DC-on), DC polarity reversal (DC-PR), and DC superimposed with switching impulse voltage (DC-SI). Results show that the applicability of ε-FGM and SNCM is limited to transient and stationary conditions, respectively. The MDFM spacer combines the advantages of ε-FGM and SNCM for adaptively relaxing the electric field under all the above conditions. It is hoped that this research will be beneficial to the development and application of spacers for the direct current gas-insulated switchgear (DC-GIS).

中文翻译：

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用于 DC-GIS 隔板的介电常数功能梯度和表面非线性电导率材料控制电场

本文通过结合介电常数功能梯度材料（ ε -FGM）和表面非线性电导率材料（SNCM），即多维材料，对应用一种新的方法来控制盆型隔板周围的电场进行了模拟研究。功能材料（MDFM）。通过迭代优化算法设计了ε -FGM隔板的介电常数分布，并将掺杂量为30和60 phr的环氧树脂/SiC复合材料指定为SNCM30和SNCM60两种SNCM隔板的涂层材料。MDFM 垫片结合了ε-FGM 在其散装和 SNCM60 在其表面。在可变条件下，即直流稳态（DC-steady）、直流导通状态（DC-on）、直流极性反转（DC-PR）、直流叠加与开关脉冲电压（DC-SI）。结果表明，ε -FGM 和 SNCM 的适用性分别仅限于瞬态和静止条件。MDFM 垫片结合了ε -FGM 和 SNCM 的优点，可在上述所有条件下自适应地放松电场。希望本研究对直流气体绝缘开关设备（DC-GIS）隔板的开发和应用有所帮助。