An EMTP Comprehensive Model of Tower Grounding and its Simulation Analysis

2017 2nd Asia Conference on Power and Electrical Engineering

能源学;电工学

Wang, Zicheng^1 ; Zhang, Yadong^1 ; Guo, Jin^1 ; Luo, Rong^2

School of Information Science and Technology, Southwest Jiaotong University, Chengdu

611756, China^1

Beijing Urban Construction DesignandDevelopment Group Co. Ltd., Beijing

100037, China^2

关键词: Comprehensive model;    Current controlled voltage source;    Grounding device;    Impulse characteristics;    Impulse grounding resistance;    Nonlinear effect;    Simulation analysis;    Traditional models;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/199/1/012083/pdf
DOI  :  10.1088/1757-899X/199/1/012083

来源: IOP

【 摘 要 】

For the purpose of designing the grounding device of the poles and towers an improved EMTP model is put forward in this paper. The impulse characteristics of the tower grounding under impulse currents are simulated and analysed based on circuit theory. Only the non-linear effects caused by soil ionization are considered in the current studies. And the interactions deriving from the coexistence of segmented grounding electrodes have been neglected. Consequently, the calculated results of the impulse grounding resistance of the complex grounding device such as the tower grounding are not enough accurate using the traditional models. The soil ionization effects are simulated through the non-linear resistance. The current-controlled voltage sources are introduced in the model to take into account the interactions of the segmented grounding electrodes. Then the comprehensive model of the tower grounding is established. Comparison of simulation results with experimental data implies that the tower grounding model proposed in this paper is more accurate and effective than the traditional model.