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Electric Field Stress in a Three Phase Common Enclosure Gas Insulated Busduct with FGM Post Type Spacer and Reduction with Metal Inserts
Journal of Electrical Engineering & Technology ( IF 1.9 ) Pub Date : 2020-12-14 , DOI: 10.1007/s42835-020-00629-w
Polamraju V. S. Sobhan , Janaki Pakalapati , Venkata Nagesh Kumar Gundavarapu , Deepak Chowdary Duvvada , Sravana Kumar Bali

The establishment of supporting insulators plays a vital role in the continuous operation of the three-phase Gas Insulated Busduct (GIB), which primarily depends on the distribution of electric field stress on the spacer surface. Shape control is a technique used along the spacer surface to achieve uniform field intensity, but this technique can also lead to very irregular shapes. The Triple Junction (TJ) is the region where the field stress has to be reduced. Over a period, high field stresses along the spacer surface will result in a surface flashover and thus de-energize the complete GIB, leading to enormous losses economically. In this paper, a Functionally Graded Material (FGM) spacer for a three-phase GIB has been designed with more number of gradings and further field stress at TJ is minimized by inserting and reshaping the metal inserts (MI) at the end of the enclosure. By doping them with different permittivity values, functionally graded materials are spatially distributed with multiple filler materials to achieve uniform stress on the electric field. Simulation is carried out with the FGM and epoxy (post type) Spacers for different voltages and FGM gradings. With MI, the stress is minimized and an enhanced uniform field allocation along the surface is obtained.

中文翻译:

三相公共外壳气体绝缘母线槽中的电场应力,带有 FGM 柱型垫片并用金属插入物减少

支撑绝缘子的建立对三相气体绝缘母线槽(GIB)的连续运行起着至关重要的作用,其主要取决于间隔件表面的电场应力分布。形状控制是一种沿隔离物表面使用的技术,以实现均匀的场强,但这种技术也可能导致非常不规则的形状。三重结 (TJ) 是必须降低场应力的区域。在一段时间内,沿隔板表面的高场应力将导致表面闪络,从而使整个 GIB 断电,从而导致巨大的经济损失。在本文中,用于三相 GIB 的功能分级材料 (FGM) 隔板设计有更多分级,并且通过在外壳末端插入和重塑金属插入件 (MI) 将 TJ 处的进一步场应力降至最低。通过用不同的介电常数值掺杂它们,功能梯度材料在空间上分布有多种填充材料,以实现电场上的均匀应力。使用 FGM 和环氧树脂(柱式)垫片对不同电压和 FGM 等级进行模拟。使用 MI,应力被最小化,并且沿表面获得增强的均匀场分配。使用 FGM 和环氧树脂(柱式)垫片对不同电压和 FGM 等级进行模拟。使用 MI,应力被最小化,并且沿表面获得增强的均匀场分配。使用 FGM 和环氧树脂(柱式)垫片对不同电压和 FGM 等级进行模拟。使用 MI,应力被最小化,并且沿表面获得增强的均匀场分配。
更新日期:2020-12-14
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