雷电对绝缘子闪络特性的影响

2018 2nd International Conference on Power, Energy and Environment: Towards Smart Technology (ICEPE) Pub Date : 2018-06-01 DOI:10.1109/EPETSG.2018.8658699

B. Thangabalan, S. Das

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引用次数: 1

摘要

雷电瞬变对电力系统有不利的影响。讨论了雷电对铁路牵引桅杆绝缘子闪络特性的影响。探讨了基础电阻和土壤电离对闪络特性的影响。考虑了雷击的CI - GRE模型进行分析。采用电磁瞬变程序(EMTP)软件进行建模和仿真。研究发现，基脚电阻对绝缘子的闪络特性有很大影响。随着基脚电阻的增大，绝缘子最容易发生闪络。引线发展模型用于理解引线沿绝缘子表面传播引起的闪络现象。由于土壤电离引起的地基电阻非线性行为增加了闪络时间，并发生在雷击的尾端。进一步研究了双指数雷击模型的影响。结果表明，CIGRE模型比双指数模型更早发生闪络。

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The Effect of Lightning on Insulator Flashover Characteristics

Lightning transient has detrimental effect on electrical system. This paper discusses the effect of lightning on insulator flashover characteristics in railway traction mast. The dependence of footing resistance and soil ionization on flashover behavior is explored. The CI GRE model of lightning stroke is considered for analysis. The modeling and simulation is carried out using Electro-Magnetic Transient Program (EMTP) software. It is observed that footing resistance strongly affects the insulator flashover characteristics. With increase in footing resistance, insulator is most likely to flashover. Leader development model is used to understand leader propagation along insulator surface causing flashover. The non-linear behaviour of footing resistance due to soil ionisation is seen to increase the flashover time and occurs at the tail end of lightning stroke. Further, the effect of double exponential lightning stroke model is studied. It is observed that flashover occurs early with CIGRE model compared to double exponential model.

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来源期刊

2018 2nd International Conference on Power, Energy and Environment: Towards Smart Technology (ICEPE)

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