Calculation of initial discharge voltage on insulator surface based on the simulation analysis of distorted electric field

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI:10.1109/ICD46958.2020.9341842

Gangjie Zhou, Tao Jiang, Fuchun Chen, Lijun Jin, Xiaokun Man

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引用次数: 3

Abstract

The calculation of initial discharge voltage is the difficulty of insulator performance evaluation. Based on the theory of streamer and the finite element simulation analysis of distorted electric field, the gas discharge model of polluted insulator surface is established in this paper. The electric field distribution in the gap of the dry band was calculated, and the impact of environmental factors such as pollution degree, humidity and temperature on the distribution of distorted electric field is studied. The dynamic process of the initial discharge of streamer is analyzed quantitatively by the finite element methods such as space electric field partition quantification and dynamic accumulation, and the calculation method of the initial discharge voltage on insulator surface is proposed. The calculation method of this paper is verified by the surface discharge experiment of polluted insulator. The experimental results show that the calculation method based on the simulation analysis of distorted electric field and considering the environmental factors can accurately quantify the streamer initial discharge voltage on insulators, which can provide useful reference for the operation and maintenance of power transmission and transformation projects.

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基于畸变电场仿真分析的绝缘子表面初始放电电压计算

初始放电电压的计算是绝缘子性能评价的难点。基于流线型理论和变形电场的有限元仿真分析，建立了受污染绝缘子表面气体放电模型。计算了干带间隙的电场分布，研究了污染程度、湿度、温度等环境因素对畸变电场分布的影响。采用空间电场分区量化和动态累积等有限元方法对流线型初始放电的动态过程进行了定量分析，提出了绝缘子表面初始放电电压的计算方法。通过污染绝缘子的表面放电实验验证了本文的计算方法。实验结果表明，基于畸变电场仿真分析并考虑环境因素的计算方法能够准确量化绝缘子上流线的初始放电电压，可为输变电工程的运行维护提供有益的参考。

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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来源期刊

2020 IEEE 3rd International Conference on Dielectrics (ICD)

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