Effect of grounded shield on electric field distribution for solid insulation vacuum circuit breaker

2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV) Pub Date : 2016-09-01 DOI:10.1109/DEIV.2016.7764000

Shilei Guan, Shaigen Han, Hui Yin, X. Bai, Tong Wang, Jing Yan

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Abstract

In the tendency of high capacity and structure miniaturization, 40.5kV solid insulation vacuum circuit breakers have been widely used in electrical distribution networks. In order to investigate the effect of the grounded shield on insulating performance, the electric field distribution of a solid insulation vacuum circuit breaker was calculated by finite element analysis software. Taking a 40.5kV solid insulation vacuum circuit breaker for example, the electric field distribution of some critical areas was concerned such as the area near main shield. Meanwhile, the electric field distribution between the embedded pole and the earth is presented. The results showed that the grounded shield might aggravate the electric field strength inside the embedded pole. The effect on the electric field in the vacuum interrupter was calculated and the grounded shield might increase the electric field intensity. The comparison results are available for reference to optimization design of insulating structure for a 40.5kV solid insulation vacuum circuit breaker.

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接地屏蔽对固体绝缘真空断路器电场分布的影响

在大容量和结构小型化的趋势下，40.5kV固体绝缘真空断路器在配电网中得到了广泛的应用。为了研究屏蔽接地对真空断路器绝缘性能的影响，利用有限元分析软件计算了固体绝缘真空断路器的电场分布。以40.5kV固体绝缘真空断路器为例，研究了主屏蔽附近等关键区域的电场分布。同时，给出了埋入极与地之间的电场分布。结果表明，接地屏蔽层会加剧埋入极内的电场强度。计算了屏蔽层对真空灭流器内电场的影响，认为屏蔽层接地会增加真空灭流器的电场强度。对比结果可为40.5kV固体绝缘真空断路器绝缘结构的优化设计提供参考。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2016 27th International Symposium on Discharges and Electrical Insulation in Vacuum (ISDEIV)

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