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Analysis of Stress Control on 33-kV Non-ceramic Insulators Using Finite-element Method

机译：用有限元方法分析33 kV非陶瓷绝缘子的应力控制

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摘要

In this article, analysis of electric field stress and electric potential distributions of a 33-kV composite insulator and factors that affect the electric field are discussed. Accordingly, the article is classified into two parts. In the first part, the designs of three different configurations of non-ceramic (composite) insulator based on their geometry modification in end fittings and water shed are discussed. The electrical performances are analyzed using electric field and electrical potential distribution. In the second part, a reduction of the electric field near the end fittings is done to control the electric field stress intended for long-term performance. For that, the grading material is placed between the core and housing materials by fitting the arcing horn near the end fittings. A 33-kV composite insulator is modeled in two dimensions by the finite-element method to investigate the electric field and electric potential distribution under normal and polluted conditions. The results reveal that an optimum installation of an arcing horn at the high-voltage end in the composite insulator with silicone rubber overlapping the edges of metal end fittings made a significant reduction in electric field stress on 33-kV non-ceramic insulators.
机译：本文讨论了33 kV复合绝缘子的电场应力和电位分布分析以及影响电场的因素。因此，该物品分为两部分。在第一部分中，讨论了非陶瓷（复合）绝缘子的三种不同配置的设计，基于它们在端部配件和排水管中的几何形状修改。使用电场和电势分布来分析电性能。在第二部分中，减小了端部接头附近的电场，以控制预期用于长期性能的电场应力。为此，通过将电弧喇叭安装在端部配件附近，将分级材料放置在型芯和外壳材料之间。用有限元方法对33 kV复合绝缘子进行二维建模，以研究正常和污染条件下的电场和电势分布。结果表明，在复合绝缘子的高压端以最佳方式安装电弧角，硅橡胶与金属端接头的边缘重叠，可显着降低33 kV非陶瓷绝缘子的电场应力。

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