The Influence of Charged Sand Particles on the External Insulation Performance of Composite Insulators in Sandstorm Condition

Abstract

In sandstorm condition, sand particles with different size collide with each other, resulting in electrification of sand particles and a strong electric field will form. When the charged sand particles move to the neighborhood of line insulators, they will impact the external insulation performance of line insulators. In this paper, electric field distribution of composite insulators with the existence of charged sand particles is calculated by means of finite element method. The result indicates that charged sand particles distort the electric field distribution around insulators obviously; the degree of aberration varies with the amount of charge that the sand particles take; when charged sand particles suspend on the surface of sheds or sheaths, these parts will bear very high field stress; when the charge-to-mass ratio of charged sand particles reaches a certain extent, corona discharge will happen in the ambient air, this will accelerate the ageing of composite insulators.

Mathematical Model for the Prediction of Microwave Signal Attenuation Due to Duststorm

“…In contrast of that, little work has been done to investigate the impact of duststorm on the same propagation paths [8][9][10]. Rapid development in telecommunication technology and increasing competition in the sector have extended service to new locations and environments especially in Africa and Asia.…”

Effect of Seawater and Fly Ash Contaminants on Insulator Surfaces Made of Polymer Based on Finite Element Method

“…This initiates the appearance of a dry band on the surface of the insulator, which can cause leakage current through the surface, resulting in a phenomenon called dry-band arcing [9]. A few research studies have analyzed the distribution of electric fields and current leakage due to pollutants in insulators made from porcelain [10], glass [11], and polymer [12][13][14][15][16]. Especially for polymer insulators, some research was carried out in simulations to determine the characteristics of the electric field due to the influence of various types of contaminants on the surface of the insulator, such as general pollution levels [10], seawater [14], sand particles [15], and others.…”

“…A few research studies have analyzed the distribution of electric fields and current leakage due to pollutants in insulators made from porcelain [10], glass [11], and polymer [12][13][14][15][16]. Especially for polymer insulators, some research was carried out in simulations to determine the characteristics of the electric field due to the influence of various types of contaminants on the surface of the insulator, such as general pollution levels [10], seawater [14], sand particles [15], and others. In addition, some research has also been carried out by testing polymer insulators, especially by observing leakage currents due to pollutants such as general pollutant levels, salt from the coast, and others [16].…”