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Field-Dependent Pollution Model under Polluted Environments for Outdoor Polymeric Insulators.

Rizwan Ahmed1, Rahisham Abd Rahman1, Arshad Jamal2

  • 1Faculty of Electrical and Electronic Engineering, University Tun Hussein Onn Malaysia, Batu Pahat 86400, Malaysia.

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Summary

Understanding pollution on polymer insulators requires accurate electric field analysis. This study introduces a novel model using nonlinear electrical characteristics to better predict electric field distribution, aiding in the prevention of dry bands and aging.

Keywords:
dry bandelectric fieldfinite element methodlayer conductanceleakage currentpollutionpolymeric insulators

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Physics

Background:

  • Pollution on polymer insulators leads to dry bands and aging, impacting performance.
  • Accurate electric field strength determination is crucial for understanding these phenomena.
  • Existing models may not fully capture the complex electrical behavior of polluted surfaces.

Purpose of the Study:

  • To develop a novel model for determining electric field distribution on polluted polymer insulators.
  • To incorporate nonlinear electrical characteristics derived from experimental data.
  • To improve the prediction of dry band formation and electrical discharge initiation.

Main Methods:

  • Laboratory measurements of layer conductance to establish nonlinear, field-dependent conductivity.
  • Computer simulations utilizing the finite element method (FEM).
  • Development of a dynamic pollution model based on experimental findings.

Main Results:

  • The proposed model successfully computed equipotential and electric field distributions.
  • Simulations provided more detailed and realistic electric field profiles compared to previous methods.
  • The model's accuracy was validated through a case study on an 11 kV polymeric insulator.

Conclusions:

  • The novel nonlinear model enhances the understanding of electric fields on polluted polymer insulators.
  • This approach offers a more accurate tool for predicting insulator performance degradation.
  • The findings contribute to improved design and maintenance strategies for high-voltage polymeric insulators.