Experimental study of response of power distribution lines to direct lightning hits

Yokoyama, Shigeru; Asakawa, Akira

doi:10.1109/61.35653

Cited by 84 publications

(14 citation statements)

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“…On power distribution lines, lightning overvoltage waveforms have a short tail because of the reflection from many concrete poles [2]. The flashover (F.O.)…”

Section: Evaluation Methods Of Lightning Hazard Formentioning

confidence: 99%

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Study on lightning hazard evaluation for power distribution lines

Ishimoto

Asakawa

2013

2013 International Symposium on Lightning Protection (XII SIPDA)

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For a rational lightning protection design of power distribution lines, it is important to consider the cost performance of countermeasures. For this purpose, it is necessary to evaluate the lightning hazard of power distribution lines quantitatively, considering the influences of lightning characteristics, the density of the power distribution lines and the structures around the power distribution lines. In this paper, first, we describe the calculation results of lightning outage rates of power distribution line. Next, we propose a lightning hazard evaluation method considering the characteristics of each region. By applying this method with actual equipment data, we can evaluate the quantitative lightning hazard of each region.

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“…On power distribution lines, lightning overvoltage waveforms have a short tail because of the reflection from many concrete poles [2]. The flashover (F.O.)…”

Section: Evaluation Methods Of Lightning Hazard Formentioning

confidence: 99%

“…voltage under a short-tail lightning impulse voltage [2]. Surge arresters (SAs) are represented by a nonlinear resistance and their discharge voltage is 30 kV.…”

Section: Evaluation Methods Of Lightning Hazard Formentioning

confidence: 99%

Study on lightning hazard evaluation for power distribution lines

Ishimoto

Asakawa

2013

2013 International Symposium on Lightning Protection (XII SIPDA)

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“…When the line is equipped with the OGW andlor surge arresters with grounding interval of less than a few hundred meters, the voltage waveform along the insulator becomes short-tailed, usually less than a few microseconds [I, 15]. Tn this paper, the flashover voltage of a solid-core insulator is assumed to be 200 kV (1.3 times of the flashover voltage for standard lightning impulse [1]) [5] according to the experimental results obtained by applying the short tailed impulse voltage waveform (about 0.5/1.0 Ils) [1]. The flashover voltage of a line-post insulator of LTWL 60 kV is postulated 120 kY.…”

Section: Return-stroke Current Parametersmentioning

confidence: 99%

“…The proportion of faults caused by lightning, however, tends to increase with often reaching beyond 30 %. The lightning overvoltage on the distribution line, associated with direct hits, is looked upon as the main factor in its insulation design [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Flashover rate of medium-voltage line estimated with lightning parameters in Japan

Michishita

Sakai

Yokoyama

et al. 2012

2012 International Conference on Lightning Protection (ICLP)

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For the effective insulation design of a medium voltage line, it is im portant to estimate flashover rate accurately. In this paper, flashover rate due to direct strokes to the line is evaluated by using peak currents obtained in southern Kyushu by the JLDN. In the evaluation, the correlation between the front duration and the peak current is taken into account as well as the low-voltage line. As the result, the estimated flashover rate for the flash is in reasonable agreement with the observed rate.

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“…Now, the total CFO for the flashover path is provided by the series combination of two insulators, which, of course, is higher, compared to the case of an earthed cross arm [3]. This means that the lightning impulse strength required to produce a flashover in ungrounded cross arm is higher than the earthed one.Previous studies have analyzed the transient performance of MV overhead networks due to direct lightning strikes [4][5][6][7][8][9][10][11]. In such studies, the flashover criterion for the insulators is usually modeled by the closing of a parallel switch when the voltage across it exceeds 1.5 times the line CFO [3].…”

mentioning

confidence: 99%