Propagation of the Surface Streamers on an Insulated Fine Wire

Takahashi, Tsutomu; Kaneda, Teruo; Suginuma, Yositaka

doi:10.1541/ieejfms1990.113.7_503

Cited by 5 publications

(2 citation statements)

References 2 publications

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“…But the aspect of discharges with linear form along the cable surface can be observed three-dimensionally from the horizontal and normal directions. There are some reports of such linear creeping discharges [10][11][12], but the detailed relation between the length and aspect of the discharge is not sufficiently understood.…”

Section: Introductionmentioning

confidence: 99%

Development of a positive creeping discharge along an aerial insulated wire

Nishi

Hanaoka

Takata

2010

Electrical Engineering Japan

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SUMMARYIn high-voltage aerial distribution systems, the insulated cables are supported by the binding wire with the post insulator at the utility pole. When a lightning strike occurs in the neighborhood of the insulated cable in an aerial power distribution system, inductive lightning surges invade the central line of the cable. Then, creeping discharges develop along the cable surface from the binding wire tip at the same time as flashover of the post insulator at a supporting point of the cable. If the cable insulator has weak points such as pinholes, a malfunction near the cable supporting point may occur, with melting of the wire due to punch-through breakdown. To prevent such accidents, it is important to clarify the mechanism of the creeping discharge along the insulated cable caused by the lightning strike. The polarity of creeping discharges depends on the polarity of the inductive lightning surges, and the extension length and aspect of the discharge differ greatly depending on the discharge polarity. The development of these creeping discharges is attributed to complicated behavior of the positive and negative electric charges.In the present study, we examined in detail the development of a positive creeping discharge along a wire surface by using a high-speed image converter camera. This paper describes the mechanism of development of a positive creeping discharge based on the experimental results.

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Section: Introductionmentioning

confidence: 99%

Development of a positive creeping discharge along an aerial insulated wire

Nishi

Hanaoka

Takata

2010

Electrical Engineering Japan

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“…The properties of creeping discharges in this case are different from those of radial discharges propagating on a planar insulator surface, because of their almost linear form along cylindrical wire surfaces. There are some reports on such linear discharges [2][3][4][5], but their detailed properties are still not fully understood. In the past, we have measured the properties of creeping streamers over wire surfaces initiating from the free ends of the binding wire just after the flashover of the post insulator surface, in order to contribute to countermea-sures against creeping events in aerial distribution systems [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Characteristics of creeping discharge along aerial insulated wire under impulse voltages with various wave front durations

Nishi

Hanaoka

Takata

et al. 2006

Electrical Engineering Japan

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SUMMARYWhen lightning occurs in the neighborhood of outdoor high-voltage distribution lines, creeping discharges propagate along the wire surface from the binding wire tip just after insulator flashover. These discharges give rise to various faults on distribution lines, for instance, disconnection and melting of wire, punch-through breakdown, and so on. We must clarify the creeping discharge characteristics associated with various inductive lightning surges from the viewpoint of safety in high-voltage distribution systems. In our previous paper, it was reported that the lengths and aspects of the negative creeping discharges were influenced by the wave front durations of impulse voltages applied to the central line with a grounded binding wire. The present study was performed to obtain more information on such creeping discharges. This paper describes the distinctive characteristics of a creeping discharge along the insulated wire surface when impulse voltages with various wave front durations are applied to the binding wire.

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Characteristics of Creeping Discharge along Aerial Insulated Wire under Impulse Voltages with Various Durations of Wave Front

et al. 2005

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When the lightning occurs at the neighborhood of outdoor high voltage distribution lines, the creeping discharges propagate along the wire surface from the binding wire tip just after the flashover of insulator. These discharges give rise to the various disasters at distribution lines, for instance, disconnection and melting of wire, punch-through breakdown etc. We must clarify the creeping discharge characteristics under various inductive lightning surges from a viewpoint of a safety in high voltage distribution systems. In our previous paper, it was reported that the lengths and aspects of the negative creeping discharges were influenced by the duration of wave front of impulse voltage applied to the central line under the grounded binding wire. The present study was accomplished in order to obtain more information on such creeping discharges. This paper describes the distinctive characteristics of creeping discharge along the insulated wire surface when the impulse voltages with various durations of wave front are applied to the binding wire.

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Propagation of the Surface Streamers on an Insulated Fine Wire

Cited by 5 publications

References 2 publications

Development of a positive creeping discharge along an aerial insulated wire

Development of a positive creeping discharge along an aerial insulated wire

Characteristics of creeping discharge along aerial insulated wire under impulse voltages with various wave front durations

Characteristics of Creeping Discharge along Aerial Insulated Wire under Impulse Voltages with Various Durations of Wave Front

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