直流气固绝缘系统界面电场调节绝缘子

Hucheng Liang, B. Du, Jin Li, R. Zhao, Zehua Wang, Miaomiao Zhang, Ang Li, Q. Du
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引用次数: 0

摘要

为了减小气固绝缘系统中的电场畸变,提出了用离心分离法制备界面电场调节绝缘子的方法。液态环氧树脂/SiC混合物在模具内固化过程中,利用离心力将SiC颗粒强制到绝缘子表面,形成均匀的非线性导电薄表面层。制作完成后,进行了电学评价,包括数值模拟和闪络试验,以验证新型绝缘子的电场调节效果。随着非线性导电层厚度的增加,新型绝缘子闪络区的最大电场减小并收敛到一个稳定值,但表面导电损耗继续增大。在正电压和负电压下,新型绝缘子的闪络电压分别提高了13%和21%。采用这种新型绝缘子,可以使DC-GIL具有更高的可靠性和更紧凑的结构。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interfacial E-field Regulating Insulator for DC Gas-solid Insulating System
To reduce the electric field (E-field) distortion in a gassolid insulating system, a centrifugation technique is proposed to fabricate the interfacial E-field regulating (IER) insulator. During the curing process of the liquid epoxy/SiC mixture in the mold, a centrifugal force was used to force the SiC particles to the insulator surface, forming a uniform thin surface layer of nonlinear conductivity. After fabrication, electrical evaluations, including numerical simulations and flashover tests, were conducted to verify the E-field regulating effect of the novel insulator. As the thickness of the nonlinear-conductivity layer increases, the maximum E-field in the flashover region of the novel insulator declines and converges to a stable value, but the surface conduction loss continues growing. The flashover voltages of the novel insulator are improved by ~13% and ~21% under positive and negative voltages, respectively. By applying such novel insulators, a higher reliability and compacter structure can be realized for the DC-GIL.
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