A plasma energy deposition based model for power cable bellows discharge

作者：Chong Xu, Pengbo Wang, Fan Yang, Shaohua Wang, Junping Cao, Xin Wang · 发表于：COMPEL The International Journal for Computation and Mathematics in Electrical and Electronic Engineering · 年份：2023 · DOI：10.1108/compel-02-2023-0054 · 被引用次数：1 · 研究领域：Plasma Diagnostics and Applications、High voltage insulation and dielectric phenomena、Electrostatic Discharge in Electronics

Purpose This paper aims at building a discharge model for the power cable bellows based on plasma energy deposition and analyzing the discharge ablation problem. Design/methodology/approach Aiming at the multiphysical mechanism of the discharge ablation process, a multiphysical field model based on plasma energy deposition is established to analyze the discharge characteristics of the power cable bellows. The electrostatic field, plasma characteristics, energy deposition and temperature field are analyzed. The discharge experiment is also carried out for result validation. Findings The physical mechanism of the bellows ablative effect caused by partial discharge is studied. The results show that the electric field intensity between the aluminum sheath and the buffer layer easily exceeds the pressure resistance value of air breakdown. On the plasma surface of the buffer layer, the electron density is about 4 × 1,019/m 3 , and the average temperature of electrons is about 3.5 eV. The energy deposition analysis using the Monte Carlo method shows that the electron range in the plasma is very short. The release will complete within 10 nm, and it only takes 0.1 s to increase the maximum temperature of the buffer layer to more than 1,000 K, thus causing various thermal effects. Originality/value Its physical process involves the distortion of electric field, formation of plasma, energy deposition of electrons, and abrupt change of temperature field.