Analysis of impulse characteristic grounding electrode in frequency and time domain based on EMTP

作者：Yang Lin^*; Wu Guangning; Tian Xiaofei

来源：Transactions of China Electrotechnical Society, 2011, 26(6): 194-198.

• Analytical method
• Effective length
• FFT analysis
• Frequency and time domains
• Frequency domain impedance
• Horizontal electrodes
• Impulse characteristics
• Impulse current
• Lightning strikes
• Risetimes
• Soil ionization
• Time domain
• Time-frequency characteristics
• Transmission line
• Transmission line models

In this paper, an analytical method of the Time-Frequency characteristics of horizontal electrode under lightning strike is presented based on EMTP, a transmission line model of horizontal electrode with the consideration of soil ionization is designed. It is easy to analysis the time-domain characteristic of horizontal electrode by using this model. Moreover, the impulse current and voltage are transformed by FFT analysis, then, the frequency impedance and effective length of horizontal electrode can be calculated, furthermore, the relationship of the magnitude and rise time of lightning with the frequency impedance can be gained.

• 出版日期2011
• 单位西南交通大学