基于磁流体动力学的配电线路树-线早期故障仿真分析

doi:10.19595/j.cnki.1000-6753.tces.L90108

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Abstract In order to study the development characteristics of the tree contact incipient fault in the distribution network, based on the theory of magnetohydrodynamics, an arc simulation model is established, and the influence of separation speed and wind speed on the development process of arc is studied. The results show that the increase of the separation speed reduces the maximum temperature of the arc from 14 315.1K to 13 591.6K at the same moment. In addition, the peak value of the arcing peak and the extinguishing peak of the voltage waveform increase, the moment when the arcing peak appears is delayed and the extinguishing peak appears earlier. Wind will lengthen the arc and drive the arc root to move on the surface of the wire and branches. The moving distance of the arc root on the surface of the branches keeps increasing, while the moving distance on the surface of the wire shows a trend of first increasing and then decreasing. As the wind speed increases, the temperature of the arc drops rapidly, and its duration is shortened, and it cannot even last for a power frequency cycle at a wind speed of 20m/s.

Key words： Power distribution line tree contact incipient fault magnetohydrodynamics separation speed wind speed

Received: 24 June 2020

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TM501.2

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	Articles by authors
	Cong Zihan
	Liu Yadong
	Yan Yingjie
	Fang Jian
	Jiang Xiuchen

Cite this article:

Cong Zihan,Liu Yadong,Yan Yingjie等. Simulation Analysis of Tree Contact Incipient Fault in the Distribution Network Based on Magnetohydrodynamic[J]. Transactions of China Electrotechnical Society, 2020, 35(zk2): 562-568.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90108 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/Izk2/562

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