特快速暂态过电压信号下的屏蔽线端口串扰电压分析  

Transient Analysis of Shielded Cable Crosstalk Under VFTO Signal

作　　者：刘寒春 周建明 刘守城 赵阳[2,3] Liu Hanchun;Zhou Jianming;Liu Shoucheng;Zhao Yang(Jiangsu Medical Device Inspection Institute,Nanjing 210019,China;School of NARI Electrical and Automation,Nanjing Normal University,Nanjing 210023,China;Jiangsu Electrical Equipment EMC Engineering Laboratory,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]江苏省医疗器械检验所,江苏南京210019 [2]南京师范大学南瑞电气与自动化学院,江苏南京210023 [3]南京师范大学江苏省电气装备与电磁兼容工程实验室,江苏南京210023

出　　处：《南京师范大学学报（工程技术版）》2021年第4期8-12,共5页Journal of Nanjing Normal University(Engineering and Technology Edition)

基　　金：江苏省社会发展重点项目(BE2019716);电网环境保护国家重点实验室开发基金项目(GYW51202001558).

摘　　要：研究气体绝缘变电站(gas insulated subsation,GIS)中隔离开关进行分合闸操作时,其绝缘气体被击穿所产生的特快速暂态过电压(very fast transient over-voltage,VFTO)在线缆中的传输特性.将传输线系统分为内、外回路,分别运用域有限差分法对电报方程进行求解,得到传输线的端口暂态响应.计算结果与CST CABLE STUDIO仿真结果高度吻合,表明所提模型与计算方法的有效性,该方法的提出对于一、二次侧传输线缆的串扰、衰减特性分析具有重要意义.This article aims to study the transmission characteristics of the very fast transient over-voltage(VFTO)generated by the breakdown of the insulating gas when the isolating switch in a gas insulated substation(GIS)is opened and closed.In this paper,the transmission line system is divided into inner and outer loops,and the telegraph equation is solved by the finite difference method respectively,and the transient response of the transmission line port is obtained.The calculation results are highly consistent with the CST CABLE STUDIO simulation results,which proves the effectiveness of the proposed model and calculation method.The proposed method is of great significance to the analysis of the crosstalk and attenuation characteristics of the primary and secondary transmission cables.

关 键 词：特快速暂态过电压 串扰 屏蔽线 时域有限差分法 

分 类 号：TM72[电气工程—电力系统及自动化]