模拟山火条件下导线-板间隙击穿特性影响因素分析

doi:10.19595/j.cnki.1000-6753.tces.160912

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Abstract The AC breakdown characteristics of conductor-plane gap under different combustion conditions were carried by the simulation forest fire test platform in this paper, and the influence mechanisms of vegetation types, combustion intensity, wind speed and slope gradient on the breakdown characteristic of gap have been analyzed. Results show that, the breakdown characteristics of gap have big differences under different vegetation types flame. Under the conditions of fir branches and fir wood crib flames, the AC breakdown voltage of gap can decline to about 10% and 20% of that in the pure air gap, respectively. When the gap is full bridged by the flame, the combustion intensity has little influence on the breakdown characteristics of gap. The dielectric strength of gap is remarkably decreased with the increase of slope gradient. Hence, to the actual transmission lines, it is need to focus on the place with bigger slope gradient. Especially the location of "V" shape valley, which is more likely to appear the tripping accidents due to the forest fire.

Key words： Forest fire transmission line breakdown characteristic wind speed slope gradient

Received: 20 August 2016 Published: 16 January 2018

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	Li Peng
	Ruan Jiangjun
	Huang Daochun
	Wei Han
	Qin Zhihang
	Long Mingyang

Cite this article:

Li Peng,Ruan Jiangjun,Huang Daochun等. Influence Factors Analysis of the Conductor-Plane Gap Breakdown Characteristic under Simulation Forest Fire Condition[J]. Transactions of China Electrotechnical Society, 2018, 33(1): 195-201.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.160912 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I1/195

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