Combined effect of different fields on the motion characteristics of dust particles around the insulators

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI:10.1109/CEIDP.2011.6232673

Jing Wang, Xidong Liang, Lin Chen, Yu Liu

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引用次数: 3

Abstract

Pollution flashover of the insulators threatens the safety and operation security of the power system severely. Contamination accumulation on the insulators is the precondition of the pollution flashover, while the contamination accumulation characteristics of the insulators depend on the motion characteristics of the dust particles moving around the insulators in service to a great degree. This paper researched the combined effect of the electric field, the air fluid field and the gravitational field on the dust particles' motion by means of experiments and numerical calculation. The distribution of the electric field and the electric potential around an actual insulator were calculated. The results indicate that the polarization force is very weak. Once the particles are charged, the electric field force acts and can drive the particles to move along the electric field lines. When there is a strong wind, the steady-state drag force is dominant and the particles move with the wind. These results can better explain the contamination accumulation characteristics of the insulators, and some measures are suggested to reduce the contamination accumulation.

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不同场对绝缘子周围尘粒运动特性的综合影响

绝缘子污闪严重威胁着电力系统的安全和运行安全。绝缘子上的污物积聚是产生污闪的前提条件，而绝缘子的污物积聚特性在很大程度上取决于在役绝缘子周围运动的粉尘颗粒的运动特性。本文通过实验和数值计算，研究了电场、空气流场和引力场对尘埃粒子运动的综合影响。计算了实际绝缘子周围的电场分布和电势。结果表明，极化力非常弱。一旦粒子带电，电场力就会起作用，驱动粒子沿着电场线运动。当有强风时，稳态阻力占主导地位，粒子随风移动。这些结果较好地解释了绝缘子的污染积累特征，并提出了减少污染积累的措施。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena

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