Title: Effect of the Electric Field on the Contamination Accumulation Characteristic of the Insulators
Abstract:Contamination accumulation characteristic of the insulators depends on the kinetic characteristic of the particles moving around the insulators to a great degree.We researched the effect of different ...Contamination accumulation characteristic of the insulators depends on the kinetic characteristic of the particles moving around the insulators to a great degree.We researched the effect of different factors on the dust particles' motion by means of experiments and numerical calculation.The effect of electric field was researched by coaxial electrode model experiments.A simplified 2D axial symmetric calculation model was built to simulate the dust particles' trajectories under the composite effect of the polarization force,the electric field force,the steady-state drag force and the gravitational force.The simulation resulted in good coincidence with the experimental phenomenon.In the end,the distribution of the electric field and the electric potential around an actual EHVDC insulator was calculated.The results are as bellow: The polarization force is very weak and can not influence the dust particles' motion but make the particles' adhesion to the insulator's surface firmer.The charged dust particles deflect along the electric field line driven by the electric field force,and the direction of the electric field between the insulator's sheds is almost perpendicular to the sheds' surface,so the electric field force can promote the precipitation of the dust particles on the dc insulators.When wind is strong,the steady-state drag force dominates and the particles move with the wind.The contamination accumulation characteristic of different insulators under different operating conditions can be better explained on the basis of the effect of the electric field on the dust particles' motion.Read More
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Cited By Count: 17
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