SF6中沿面放电及其放电信号的多尺度仿真研究

doi:10.16183/j.cnki.jsjtu.2023.525

上海交通大学学报 ›› 2025, Vol. 59 ›› Issue (9): 1397-1406.doi: 10.16183/j.cnki.jsjtu.2023.525

• 新型电力系统与综合能源 • 上一篇

SF₆中沿面放电及其放电信号的多尺度仿真研究

周录波¹, 张钊棋²(), 王栋¹, 宋辉²

¹ 国网上海市电力公司超高压分公司, 上海 200063
² 上海交通大学电气工程系, 上海 200240

收稿日期:2023-10-19 修回日期:2023-11-20 接受日期:2023-11-30 出版日期:2025-09-28 发布日期:2025-09-25
通讯作者: 张钊棋,博士生; E-mail:zhangzhaoqi@sjtu.edu.cn.
作者简介:周录波(1980—),硕士,高级工程师,从事高压电力设备检修和维护研究.
基金资助:
国家电网上海市电力公司科技项目(520950220004)

A Multiscale Simulation of Surface Discharge and Discharge Signals in SF₆

ZHOU Lubo¹, ZHANG Zhaoqi²(), WANG Dong¹, SONG Hui²

¹ Extra High Voltage Branch of State Grid Shanghai Electric Power Company, Shanghai 200063, China
² Department of Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Received:2023-10-19 Revised:2023-11-20 Accepted:2023-11-30 Online:2025-09-28 Published:2025-09-25

摘要/Abstract

摘要：

沿面放电是气体绝缘组合电器设备内部的常见放电类型,目前对其微观过程的认识尚不明晰,缺陷局部放电微观过程与宏观检测信号间亦缺乏理论关联.首先基于流体-化学模型仿真SF₆气体中的沿面放电过程,得到带电粒子浓度、沿面流注速率的变化规律.然后,将微观放电产生的电流脉冲作为激励,基于有限积分法对沿面放电产生的放电信号进行仿真,建立局部放电微观过程与放电检测信号之间的对应关系.结合微观放电仿真得到的电磁信号时域波形与传统的高斯激励源相比更加贴合实际.研究成果是对现有局部放电信号微观机理研究的有效补充,为基于放电信号分析的绝缘状态评估奠定基础.

关键词: 沿面放电, 微观过程, 流体-化学模型, 有限积分法, 放电信号, 多尺度仿真

Abstract:

Surface discharge is a common type of discharge occurring in gas-insulated switchgear equipment, of which the microscopic process remains unclear. Additionly, there is a lack of theoretical correlation between the microscopic process of partial discharge due to defects and the macroscopic detection signals. First, the surface discharge process in SF₆ is simulated based on a fluid-chemical simulation model, revealing the variation patterns of charged particle concentration and surface streamer velocity. Then, taking the current pulse generated in the microscopic discharges as excitation sources, the discharge signals resulting from the surface discharges are simulated based on the finite integral method, establishing a correspondance between the microscopic partial discharge process and the detectable discharge signals. Compared with the conventional Gaussian excitation source, the time-domain waveforms of electromagnetic signals obtained from the microscopic discharge simulation more chosely matches to realistic conditions. These findings effectively supplement existing researches on the microscopic mechanisms of partial discharge signals, laying a foundation for the insulation state evaluation based on the discharge signal analysis.

Key words: surface discharge, microscopic process, fluid-chemical model, finite integral method, discharge signal, multiscale simulation

中图分类号:

TM835

周录波, 张钊棋, 王栋, 宋辉. SF₆中沿面放电及其放电信号的多尺度仿真研究[J]. 上海交通大学学报, 2025, 59(9): 1397-1406.

ZHOU Lubo, ZHANG Zhaoqi, WANG Dong, SONG Hui. A Multiscale Simulation of Surface Discharge and Discharge Signals in SF₆[J]. Journal of Shanghai Jiao Tong University, 2025, 59(9): 1397-1406.

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序号	反应方程式	反应类型
1	e+SF₆→2e+${{SF}_{6}}^{+}$	电离
2	e+ SF₆→${{SF}_{6}}^{-}$	附着
3	e+ SF₆→${{SF}_{5}}^{-}$+F	附着
4	e+SF₆→SF₄-+F₂	附着
5	SF₆-+SF₆+→2SF₆	复合
6	SF₅-+SF₆+→SF₅+SF₆	复合
7	SF₄-+SF₆+→SF₄+SF₆	复合

SF₆中沿面放电及其放电信号的多尺度仿真研究

A Multiscale Simulation of Surface Discharge and Discharge Signals in SF₆

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