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Lookup NU author(s): Professor Vladimir TerzijaORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
Partial arcs, spark discharges, and other destructive gaseous discharges frequently occur on overhead line, leading to insulation failure and power outages. Particle composition, as a fundamental parameter, governs discharge characteristics. This study focuses on partial arcs on the insulator-grading ring gap by analyzing rod-plane gap arc discharges under AC/DC voltage through emission spectroscopy. Characteristic species and reactions of arc are identified to construct a two-temperature discharge composition model. To address the model’s strong nonlinearity, a dimensional reduction approach combined with an advanced iterative algorithm is proposed. Numerical validation demonstrates that dimensional reduction compresses variables to the number of elemental species, while the new algorithm achieves a twelvefold speed improvement over conventional Newton iteration with comparable accuracy. Equilibrium analysis reveals that increasing the parameter θT yields a non-monotonic ionization effect: electron density rises and then falls (inverse U-shaped profile), whereas neutral particle density decreases monotonically. These findings provide valuable reference data for discharge parameter calculations in insulation coordination and fundamental plasma modeling. The proposed numerical methods further offer efficient tools for investigating discharge physics in overhead line engineering.
Author(s): Meng W, Li J, Li Q, Kopsidas K, Hu J, Terzija V, Jiang X, Wang Z
Publication type: Article
Publication status: Published
Journal: IEEE Transactions on Dielectrics and Electrical Insulation
Year: 2025
Pages: Epub ahead of print
Online publication date: 26/11/2025
Acceptance date: 02/04/2018
Date deposited: 10/12/2025
ISSN (print): 1070-9878
ISSN (electronic): 1558-4135
Publisher: IEEE
URL: https://doi.org/10.1109/TDEI.2025.3636852
DOI: 10.1109/TDEI.2025.3636852
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