Investigation on Propagation Characteristics of PD-induced Electromagnetic Wave in T-Shaped GIS Based on FDTD Method

2014 ◽  
Vol E97.C (9) ◽  
pp. 880-887 ◽  
Author(s):  
Mingzhe RONG ◽  
Tianhui LI ◽  
Xiaohua WANG ◽  
Dingxin LIU ◽  
Anxue ZHANG
Keyword(s):  
Electromagnetic Wave ◽  
Fdtd Method ◽  
Propagation Characteristics

Characteristics Simulation of Ultra-High Frequency Electromagnetic Wave Excited by Equivalent Partical Discharge Mathematical Model in GIS

2014 ◽  
Vol 1070-1072 ◽  
pp. 1138-1143
Author(s):  
Guang Ke Xu ◽  
Wei Wei Zhang ◽  
Zhen Hua Zhu ◽  
Nan Wang ◽  
Fu Qiang Zhao
Keyword(s):  
Mathematical Model ◽  
Electromagnetic Wave ◽  
Frequency Domain ◽  
Time Domain ◽  
High Frequency ◽  
Electromagnetic Waves ◽  
Fdtd Method ◽  
Propagation Characteristics ◽  
Ultra High Frequency ◽  
Actual Measure

UHF electromagnetic waves radiated by PD in GIS can range from several hundreds of MHz to several GHz. FDTD method is usually used to simulate the characteristics of the UHF electromagnetic waves. Compared with the traditional ideal Gaussian pulses in simulation, one equivalent PD mathematical model based on the actual measure PD sources was considered to simulate the propagation characteristics. Time domain and frequency domain spectrum of signals excited by the two PD sources were studied to analyze the propagation characteristics. It can draw the conclusions that each insulator detect leads to each electromagnetic and its time domain and frequency domain spectrum. So it is recommended to use equivalent PD mathematical model to simulator the propagation characteristics.

Electromagnetic wave propagation in a chiroplasma-filled waveguide

1999 ◽  
Vol 62 (1) ◽  
pp. 87-94 ◽  
Author(s):  
J. GONG
Keyword(s):  
Wave Propagation ◽  
Electromagnetic Wave ◽  
Cross Section ◽  
Electromagnetic Waves ◽  
Electromagnetic Wave Propagation ◽  
Propagation Constant ◽  
Circular Cross Section ◽  
Propagation Characteristics ◽  
Waveguide Modes ◽  
The Family

A dispersion equation is derived for a cylindrical waveguide of circular cross-section partially filled with chiroplasma. The propagation characteristics of electromagnetic waves in the family of waveguide modes are studied. The dispersion curves are given. It is found that the propagation constant changes almost linearly with the chirality admittance for the parameters that we choose, and increases with increasing filled area.

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