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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摘要针对直流GIL导体表面金属颗粒去活性化问题,研究不同施加电压下GIL高压导体上表面正球形金属颗粒的运动行为,建立二维极坐标下同轴圆柱电极的颗粒受力模型,采用流体力学理论分析不同雷诺数下阻力系数的取值,并结合经典碰撞和动态接触理论分析颗粒与电极间的非弹性碰撞过程,充分考虑了颗粒法向恢复系数与法向速度之间的关系以及反射随机角度的影响,利用模型对颗粒的运动轨迹进行仿真分析。研究表明：当施加电压大于“谐振”运动临界电压时,颗粒将在腔体下部进行以θ =270°为中心的偏移角度幅值衰减的往复运动,并最终在θ =270°处进行类似于“谐振”的往复振荡运动;在这个过程中颗粒的运动范围角度和“谐振”周期几乎不受初始位置的影响,但却随施加电压的增大而减小,而颗粒进入“谐振”运动的过渡时间随着施加电压和初始位置角度的增大而减小。

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	孙秋芹
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	陈赦
	汪沨

关键词 ：金属颗粒, 非弹性碰撞, 恢复系数, 运动行为, 临界电压

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

收稿日期: 2018-04-25 出版日期: 2018-11-27

PACS:

TM85

基金资助:国家自然科学基金资助项目（51507058）

通讯作者: 孙秋芹男,1984年生,副教授,硕士生导师,研究方向为长间隙电弧、直流管道输电等方面的研究工作。E-mail: sunqq@hnu.edu.cn

作者简介: 罗宸江男,1993年生,硕士研究生,研究方向为GIS/GIL中颗粒运动行为分析及抑制技术。E-mail: 18370637191@163.com

引用本文:

孙秋芹, 罗宸江, 王峰, 陈赦, 汪沨. 直流GIL导体表面金属颗粒跳跃运动特性研究[J]. 电工技术学报, 2018, 33(22): 5206-5216. Sun Qiuqin, Luo Chenjiang, Wang Feng, Chen She, Wang Feng. Jumping Characteristics of Metal Particle on the Surface of DC Gas Insulated Transmission Line Conductor. Transactions of China Electrotechnical Society, 2018, 33(22): 5206-5216.

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