Effect of Charge Existence on Electric Field Distribution in String Insulator
DOI:
https://doi.org/10.56532/mjsat.v6i1.720Keywords:
Charge distribution, Glass insulator string, Electric field, Stainless steel mesh, Finite element softwareAbstract
The charge existence at any region of insulator sting will distort the original electric field distribution and may result in the enhancement of local electric fields to the highest level over a long period of time. This situation would then lead to the occurrence of partial discharge and further cause premature failure of insulating material due to degradation process which can lead to electrical breakdowns and electrostatic discharges. Therefore, this paper investigates the effect of charge existence on the electric field distribution along glass insulator string. The measurement of charge distribution was experimentally collected using charge sensors to be applied in the simulation modelling. Finite element software was also adopted in this paper to assess the effect of charge existence on electric field distribution. It is found that the charge distribution is successfully collected with negative charge distribution pattern is obtained. It is proven that the value of charge collected in the experimental works indeed affects the distribution of electric field when the insulator is injected with that value. Also, it was found that the negative charge has more impact toward the electric field distribution compared with positive charge. The findings suggest that the existence of charge on the surface of insulator is certainly affect the local distribution which after a long period of time may affect the high voltage insulation performance and finally may threaten the reliability of power system network.
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