不同排列的金属球在均匀电场中的仿真研究

大量研究已证明导线表面状态会极大影响导线的电晕性能，但微观层面上是如何影响电场分布的研究并不充足。因采用均匀电场可以更好地关注颗粒本身相互影响的规律。计算了在平行板电极形成的均匀电场中，不同排列的球状金属颗粒放置在电压极板上的影响，当金属球成一字排列时，随着数量的增多，最大场强值和最大面电荷密度都会被削弱，趋向一极限值，并根据数量-场强曲线拟合了公式。当3颗球一字排列时，中间球正好位于两边球中心时削弱作用最强，且两边球距离越近效果越明显；当金属球按正多边形排列时，数量越多削弱越明显，距离越近削弱越明显。1颗金属球在距离极板不同高度时，金属球靠近但未接触极板时场强最大。计算证明并非金属球越少电场分布越好，为优化导线表面状态、去除瑕疵提供了理论基础。

Simulation of Metal Particles with Different Arrangements in Uniform Electric Field

Many studies at macro level have proved that the surface states of conductors can affect the corona performance greatly, but their effects on the electric field pattern are not studied sufficiently at microscopic level. The influence of the different arrangement of metal particles on the plates applied voltage was simulated in the uniform electric field, because the uniform electric field allowed us to pay more attention to the law of mutual influence of the particles. When the metal particles were arranged in a line, as the number increased, the maximum electric field strength and the maximum surface charge density were weakened, which tended to a limit value. The formula was fitted according to the quantity-electric field strength curve. When three balls were arranged in a line, the weakening effect was the strongest when the middle ball was located in the middle of the other balls, and the shorter the distance between the two balls was, the more obvious the effect was. When the metal balls were arranged in regular polygons, the more the balls were and the closer their distance was, the more obvious the weakening effects. It was also found that the field strength reached the highest when the metal ball was close to but not in contact with the plate. The simulation results show that the less number of metal balls may not lead to a better electric field distribution, which provides a theoretical basis for better optimizing the surface state of conductors and removing the defects.