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首页> 外文期刊>IEEE Transactions on Dielectrics and Electrical Insulation >Using chaotic features of leakage current for monitoring dynamic behavior of surface discharges on an ice-covered insulator
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Using chaotic features of leakage current for monitoring dynamic behavior of surface discharges on an ice-covered insulator

机译：利用泄漏电流的混沌特性监测覆冰绝缘子上表面放电的动态行为

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摘要

Based on AC flashover tests on an ice-covered insulator, leakage current (LC) was measured to check the chaotic features through estimation of the largest Lyapunov exponent. Based on the embedding space theory and phase space reconstruction method, the LC attractor phase portrait and related correlation dimension were obtained in relation with the insulator surface performance. It was found that the largest Lyapunov exponents are all positive demonstrating that LC has chaotic features. The variation in chaos attractors can graphically indicate an increasing regularity in the surface discharges. The correlation dimension shows a decreasing tendency with the development of arcing discharges, which reveals a decreasing complexity in the surface discharges, especially just prior to the flashover occurrence. Therefore, chaotic features of LC are sensitive to dynamic discharge behavior on ice-covered insulators, which can be applied as a monitoring method for pre-warning flashover occurrence of outdoor insulators under icing conditions.
机译：根据在覆冰绝缘子上的交流闪络测试，通过估计最大Lyapunov指数，测量泄漏电流（LC）以检查混沌特征。基于嵌入空间理论和相空间重构方法，获得了与绝缘子表面性能相关的LC吸引子相像和相关的相关维数。发现最大的李雅普诺夫指数都是正数，表明LC具有混沌特征。混沌吸引子的变化可以图形化地表明表面放电的规律性增加。相关尺寸随着电弧放电的发展而显示出减小的趋势，这表明表面放电的复杂性在降低，尤其是在闪络发生之前。因此，LC的混沌特性对覆冰绝缘子上的动态放电行为很敏感，可将其用作结冰条件下室外绝缘子预警闪络发生的监测方法。

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  • 作者

    Yong Liu; Masoud Farzaneh; B. X. Du;

  • 作者单位

    Key Laboratory of Smart Grid of Ministry of Education (Tianjin University), School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China;

    Canada Research Chair on Engineering of Power Network Atmospheric Icing (INGIVRE), Université du Québec à Chicoutimi, Qc, Canada;

    Key Laboratory of Smart Grid of Ministry of Education (Tianjin University), School of Electrical Engineering and Automation, Tianjin University, Tianjin 300072, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Insulators; Discharges (electric); Flashover; Surface discharges; Ice; Monitoring; Leakage currents;

    机译：绝缘子;放电（电）;闪络;表面放电;冰;监测;泄漏电流;

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