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Research Article |

Numerical Simulation on Charge Transport in Polyethylene with Field-Dependent Parameters Under DC Electric Field

Author(s): Boukhari Hamed1*, Youcef Abdallah Baadj2, and Fatiha ROGTI3

Published In : International Journal of Electrical and Electronics Research (IJEER)        Volume 13, Issue 2

Publisher : FOREX Publication

Published : 10 June 2025

e-ISSN : 2347-470X

Page(s) : 257-265

DOI: https://doi.org/10.37391/IJEER.130209

Abstract

During the past few years, the use of HVDC cables has increased exponentially. However, the accumulation of space charges within insulating materials remains a major challenge. Understanding the mechanisms governing this phenomenon is key to improving HVDC performance. This goal is often achieved through numerical simulations. Therefore, it is imperative that they are performed efficiently. In this work, a bipolar charge transport (BCT) model is used to offer a physical description of space charge behavior in low-density polyethylene (LDPE) under a high DC electric field. This model includes injection, migration, trapping, dettraping and recombination charges with parameters dependent on the electric field such as mobility, trapping, and recombination. The principal simulation results are dedicated to temporal and local distributions of the net charge density, electric field distribution, trapping distribution, quantity of charge mobile and trapped and evolution of external current density. The result shows that the trapping charge probability depending of the electric field in LDPE has a significant impact on the charge transport behavior compared to other properties. The trapping charge is lower near the interface and higher as the charges approach the center of the LDPE, leading to a substantial accumulation of charges in the center of the sample as the applied electric field increase, and charge transport in steady state is dominated by the trapped charges.

Keywords: Space charge, LDPE, BCT, Field-Dependent Parameters.




Boukhari Hamed, Laboratoire Materials Energy Systems Technology and Environment, Université de Ghardaia, BP 455 Ghardaia 47000, Algérie; Email: boukhari.hamed@univ-ghardaia.edu.dz

Youcef Abdallah Baadj, Laboratoire de développement des matériaux semi-conducteur et matériaux diélectrique, Département de Génie Electrique, Université Amar Tlidji, Laghouat Route de Ghardaia BP 37, Algeria; Email: baadjyoucef@gmail.com

Fatiha ROGTI, Analysis and Control of Energy Systems and Electrical Networks, University of laghouat, Algeria; Email: f.rogti@mail.lagh-univ.dz

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Boukhari Hamed, Youcef Abdallah Baadj, and Fatiha ROGTI (2025), Numerical Simulation on Charge Transport in Polyethylene with Field-Dependent Parameters Under DC Electric Field. IJEER 13(2), 257-265. DOI: 10.37391/IJEER.130209.