直流GIL导体表面金属颗粒跳跃运动特性研究

doi:10.19595/j.cnki.1000-6753.tces.180703

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Abstract To restrain the movement of metal particles in DC gas insulated transmission line (GIL), the mechanical model of particle in a coaxial cylinder was established by means of the two-dimensional polar coordinate system. The motion behavior of spherical metal particle rested on the upper surface of high voltage conductor in GIL was investigated. Based on the fluid dynamics theory, the resistive force coefficient under different Reynolds number was analyzed; combing the classical collision theory with dynamic contact theory, the inelastic collision process between the particle and the electrode was considered in the modeling; the restoring coefficient in normal direction of motion as well as the randomness of the reflection angle was considered. The motion trajectory of metallic particle was computed, and the effect of the applied voltage was discussed. It is observed that the metallic particles have a reciprocation motion around 270° as the applied voltage exceeds the critical resonant voltage and eventually keep moving up and down at 270°, forming the so-called resonant movement. The area and the period of such behavior are hardly affected by the initial position, decrease with the increase of the applied voltage. The transition time of the particles entering the resonant state also decreases with the increase of the applied voltage and the initial position angle.

Key words： Metal particles inelastic collision coefficient of restitution motion behavior critical voltage

Received: 25 April 2018 Published: 27 November 2018

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TM85

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	Articles by authors
	Sun Qiuqin
	Luo Chenjiang
	Wang Feng
	Chen She
	Wang Feng

Cite this article:

Sun Qiuqin,Luo Chenjiang,Wang Feng等. Jumping Characteristics of Metal Particle on the Surface of DC Gas Insulated Transmission Line Conductor[J]. Transactions of China Electrotechnical Society, 2018, 33(22): 5206-5216.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.180703 OR https://dgjsxb.ces-transaction.com/EN/Y2018/V33/I22/5206

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