GIS中不均匀直流电场下球状自由导电微粒运动分析

Motion Analysis of Spherical Free Conducting Particle in Non-uniform Electric Field of GIS Under DC Voltage

针对气体绝缘系统(GIS)中自由导电微粒无害化的问题,研究导电微粒在GIS中不均匀电场作用下的运动规律,建立球状自由导电微粒在楔形不均匀电极系统中的受力模型,采用Runge-Kutta方法对微粒运动方程进行求解,并对球状自由导电微粒在不均匀直流电场中的运动轨迹进行仿真,同时考虑电压波动和电极表面粗糙等随机因素对微粒运动轨迹的影响。另外,研究了自由导电微粒的运动轨迹与施加电压、微粒初始位置、微粒和电极材料的性质及电极表面状况的关系。研究结果表明:在一定的电场条件下,微粒运动会处于一种谐振状态,而施加电压的幅值。

A stress model of spherical free conducting particle between divergingly plane electrodes is established to investigate the motion behavior of the particle in non-uniform electric field under DC voltage. The motion trajectory of spherical free conducting particle in non-uniform electrical field under DC voltage is simulated by solving the particle motion equations based on Runge-Kutta method. Furthermore, the relationships between motion trajectory of spherical free conducting particle and some factors including applied voltage, original position of particle, materials property of particle and electrode, status of electrode surface are also studied. It is observed that the particle will tend to fall into a kind of resonance state at a certain electrical field. Results also show that the particle motion trajectory is affected notably by the amplitude and waveform of applied voltage as well as reflecting coefficient of electrode surface.