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Developed optimization technique used for the distribution of U-shaped permittivity for cone type spacer in GIS

机译:开发用于GIS圆锥形垫片的U形介电常数分布的优化技术

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摘要

The solid/gas interface formed by solid spacer and insulating gas represents the weakest point in gas insulated systems (GIS) which is due to field intensification on spacer surface especially near triple junctions (Solid insulator – Gas – Electrodes) at HV and ground electrodes. Functionally Graded Material (FGM) is applied to the spacer design instead of uniform distribution to improve the electric field distribution across the spacer surface without changing its simple profile. Cone spacer model with uniform and FGM permittivity distribution has been introduced to study the effect of FGM in improving the electric field characteristics along spacer surface and near triple junctions. The verification of the proposed model has been investigated by comparing the obtained simulation results of the field to these given by others. Developed computerized optimization technique for automatic U-shape permittivity distribution is presented. U-shape permittivity distribution is used to mitigate the electric field strength not only near HV triple junction (Solid insulator – Gas – HV electrode) but also near ground triple junction (Solid insulator – Gas – Ground electrode). The simulation of the electric field is presented by the concept of Finite Element Method (FEM) using Comsol Multiphysics software. The optimization algorithm is programmed using Comsol LiveLink™ for MATLAB.
机译:由固体隔离物和绝缘气体形成的固/气界面代表了气体绝缘系统(GIS)中的最弱点,这是由于隔离物表面上的电场增强,尤其是在高压和接地电极的三重结(固体绝缘体–气体–电极)附近。功能梯度材料(FGM)应用于间隔物设计,而不是均匀分布,以改善整个间隔物表面上的电场分布,而无需更改其简单轮廓。引入了具有均匀且FGM介电常数分布的圆锥间隔物模型,以研究FGM对改善间隔物表面和三重结附近的电场特性的影响。通过将获得的现场仿真结果与其他仿真结果进行比较,对所提出模型的验证进行了研究。介绍了开发的用于自动U形介电常数分布的计算机优化技术。 U型介电常数分布不仅可以减轻HV三重结附近(固体绝缘体–气体–高压电极)的电场强度,还可以减轻接地三重结附近(固体绝缘体–气体–接地电极)的电场强度。使用Comsol Multiphysics软件通过有限元方法(FEM)的概念介绍了电场的仿真。使用Comsol LiveLink™for MATLAB对优化算法进行编程。

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