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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摘要为研究配电线路树-线早期故障中电弧的发展特性,基于磁流体动力学理论,建立树闪电弧仿真模型,研究树枝-导线的分离速度及自然风速对电弧发展的影响。研究结果表明,分离速度的增加使得电弧在同一时刻的最高温度由14 315.1K降低至13 591.6K,且电压波形的燃熄尖峰值升高,燃弧尖峰出现时刻延后,熄弧尖峰出现时刻提前;自然风将使得电弧拉长,并驱使弧根在导线和树枝表面移动,弧根在树枝表面的移动距离持续增加,而在导线表面的移动距离先增后减;随着风速的增加,电弧的温度迅速下降,持续时间缩短,在20m/s的风速下甚至不能持续一个工频周期。

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	丛子涵
	刘亚东
	严英杰
	方健
	江秀臣

关键词 ：配电架空线路, 树-线早期故障, 磁流体动力学, 分离速度, 自然风速

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

收稿日期: 2020-06-24

PACS:

TM501.2

通讯作者: 刘亚东男,1982年生,博士,副教授,研究方向为输配电设备故障检测与诊断。E-mail:lyd@sjtu.edu.cn

作者简介: 丛子涵男,1996年生,硕士,研究方向为配电网故障检测。E-mail:congzihan1996@163.com

引用本文:

丛子涵, 刘亚东, 严英杰, 方健, 江秀臣. 基于磁流体动力学的配电线路树-线早期故障仿真分析[J]. 电工技术学报, 2020, 35(zk2): 562-568. Cong Zihan, Liu Yadong, Yan Yingjie, Fang Jian, Jiang Xiuchen. Simulation Analysis of Tree Contact Incipient Fault in the Distribution Network Based on Magnetohydrodynamic. Transactions of China Electrotechnical Society, 2020, 35(zk2): 562-568.

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

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