Study on Lighting Protection Situation and Device of 10 kV Distribution Lines

doi:10.11930/j.issn.1004-9649.201708146

Abstract

Abstract: Lightning-caused line break became more and more serious with application of 10 kV Insulation-covered distribution lines. According to statistic, 49% of lightning stroke tripping happen on distribution lines. It is necessary to develop lighting protection device to reduce lightning-caused break probability and improve power supply reliability. By taking typical 10 kV distribution lines as example, the situation and tripping scenarios are analyzed in detail. An arrester with two cascade gaps are adopted and improved. The spherical electrode and main gap parameters are determined by experiments. The volt-second characteristic of lightning impulse and current cut-down ability are also tested. The lighting protection ability of arrester with two cascade gaps are both verified by engineering application.

Key words: 10 kV distribution lines, lightning-caused break, arrester with two cascade gaps, lightning device

CLC Number:

TM863
TQ174

QIN Ruyi, LIU Zongliang, CHEN Zhou, XU Chongyou, WU Jun. Study on Lighting Protection Situation and Device of 10 kV Distribution Lines[J]. Electric Power, 2018, 51(4): 39-44,95.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201708146

https://www.electricpower.com.cn/EN/Y2018/V51/I4/39

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