上海交通大学学报

上海交通大学学报

• •    下一篇

SF6中沿面放电及其放电信号的多尺度仿真研究（网络首发）

  

  1. 1. 国网上海市电力公司超高压分公司；2. 上海交通大学电气工程系
  • 基金资助:
    国家电网上海市电力公司科技项目（520950220004）

A Multiscale Simulation Research on Surface Discharge and Discharge Signals in SF6

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

PDF (PC)

430

摘要： 沿面放电作为GIS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，缺陷局放微观过程与宏观检测信号间亦缺乏理论关联。基于流体-化学仿真模型，仿真了SF6气体中的沿面放电过程，得到了带电粒子浓度、沿面流注速率的变化规律。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了仿真，建立了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放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: As a common type of discharge in GIS, surface discharge is still unclear in its microscopic process, and there is also a lack of theoretical correlation between partial discharge and signal detection. Based on the fluid-chemical simulation model, the surface discharge process in SF6 was simulated, and the variation laws of charged particle concentration and surface streamer velocity were obtained. Using the current pulse calculated in the microscopic simulation as an excitation, the discharge signals generated by the surface discharge was simulated based on the finite integral method, and the relationship between the microscopic process of the partial discharge and the discharge detection signal was established. Compared with the signal excited by the traditional Gaussian source, the electromagnetic signal time-domain waveforms obtained by the micro-discharge simulation are more realistic. The research results are an effective supplement to the existing research on the microscopic mechanism of partial discharge signals, laying the foundation for the insulation state evaluation based on the analysis of discharge signals.

Key words:

中图分类号: