Simulation of the Characteristics of Ultra-high Frequency Electromagnetic Wave Excited by Partical Discharge in GIS
The ultra-high frequency (UHF) electromagnetic waves radiated by partial discharge (PD) in GIS can range from several hundreds of MHz to several GHz.Finite difference-time domain (FDTD) method is used in this paper in order to simulate the characteristics of the UHF electromagnetic waves.Based on the comparison of several groups of simulations,those factors influencing the propagation of UHF signals are analyzed,which include PD quantity and pulse width,relative dielectric constant of insulators and L-type contact.The simulation results show that,with the same discharge quantity,the smaller the pulse width,the more energy PD pulse excites.Furthermore,the larger relative dielectric constant of insulators will lead to larger reflection,more attenuation and longer time delay of the signals passing through the insulators.Finally,the results prove that UHF signals decay much more rapidly and lose much more energy when they propagate through the L-type contacts.
GIS:partial discharge:ultra-high frequency finite difference-time domain:electromagnetic wave
Guangke Xu Xinzhen Fang Qingquan Li Fanliang Deng Zhirui Liu Baidong Dong
High Voltage Institute School of Electrical Engineering,Shandong University Jinan,China Power Supply Company of Power Corporation Daqing Oilfield Daqing,China
国际会议
威海
英文
254-258
2011-07-06（万方平台首次上网日期，不代表论文的发表时间）