GIS中L型和T型结构对超高频电磁波传播影响的仿真研究  

Simulative Research of L-type and T-type Bends' Effects on UHF Electromagnetic Wave Propagation in GIS

作　　者：王江[1] 钱勇[2] 叶海峰[2] 

机构地区：[1]重庆市电力公司,重庆400014 [2]上海交通大学电气工程系,上海200240

出　　处：《电气自动化》2013年第5期83-85,109,共4页Electrical Automation

摘　　要：运用时域有限差分算法对GIS的中L型和T型分支内局放超高频电磁波的传播进行仿真。研究了L型和T型分支对超高频电磁波时域波形及频率成分的影响,指出L型分支对在GIS腔体内传播的超高频电磁破电场强度衰减程度较为严重,L型分支对电磁波的衰减集中在300 MHz至2 000 MHz以及3 000 MHz以上频率,且某些频率成分的电场强度得到增强;电磁波通过T型分支后,信号各频率成分沿拐弯路径比沿直线路径衰减严重。In this paper, the Finite Difference Time Domain （FDTD） method was used to simulate the propagaion of PD-induced UHF electromagnetic wave in the L-type bend and L-type bend of GIS. The effects of L-type bend and T-type bend on the p-p value of PD- induced electromagnetic and the amplitude-frequency characteristics of E-filed wave were evaluated. Simulating results show that： for the L-type GIS, the p-p value of PD-induced electromagnetic wave is significantly attenuated when it transmits through the L-type bend^and the attenuation frequency is mostly in the span between 1500MHz and 3000MHz or higher than 3000MHz. For the T-type GIS, the p-p value of PD-induced electromagnetic wave is significantly attenuated when it transmits to the vertical side of T-type bend, while it is slightly attenuated when it transmits to the other side of the straight part.

关 键 词：GIS 超高频 电磁波 FDTD 频域特性 电场强度 

分 类 号：TM83[电气工程—高电压与绝缘技术]