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首页> 外文期刊>Electrical engineering in Japan >The Influence of Wave Front Duration of Impulse Voltage on Creeping Discharges along Aerial Insulated Wire
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The Influence of Wave Front Duration of Impulse Voltage on Creeping Discharges along Aerial Insulated Wire

机译：脉冲电压的波前持续时间对沿航空绝缘电线蠕变放电的影响

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摘要

In high-voltage aerial distribution systems, creeping discharges progress along the cable surface from the free end of the binding wire when overvoltages caused by a lightning surge have invaded the central line of an insulated cable. Consequently, various accidents such as punch-through breakdown, melting, or snapping of a cable, often occur at these systems. In our previous studies, it has been clarified that the lengths and aspects of creeping discharges under a 1.2/50μs impulse voltage condition can be markedly affected by changes in the electric field strength on the cable surface. However, lightning impulse surges which may invade the central line of a cable have various wave front durations. This will further complicate creeping discharge phenomena due to lightning. In this paper, we report the influence of the wave front duration on both the lengths and the aspects of the creeping discharges which progress on the cable on application of lightning impulse voltages. It has been shown that the behavior of negative creeping discharges reveals pronounced changes in response to the duration of the wave front of the applied voltage.
机译：在高压架空配电系统中，当雷电浪涌引起的过电压侵入绝缘电缆的中心线时，蠕变放电会从绑线的自由端沿电缆表面进行。因此，在这些系统上经常会发生各种事故，例如穿通击穿，电缆熔化或断裂。在我们以前的研究中，已经阐明，在1.2 /50μs脉冲电压条件下，蠕变放电的长度和方面会受到电缆表面电场强度变化的显着影响。但是，可能侵入电缆中心线的雷电冲击波具有各种波阵面持续时间。这将使由于雷电引起的蠕变放电现象更加复杂。在本文中，我们报告了在施加雷电冲击电压时，波前持续时间对电缆长度和蠕变放电方面的影响，蠕变放电在电缆上进行。已经表明，负蠕变放电的行为揭示了响应于施加电压的波前持续时间的明显变化。

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