Impact of Frequency-Dependent Soil on Transient Ground Potential Rise of Counterpoise Electrodes

被引：0
|
作者：
de Araujo, Anderson R. J. [1 ]
da Silva, Wagner C. [2 ]
Pissolato Filho, Jose [1 ]
机构：
[1] Univ Estadual Campinas, Sch Elec Comp Engn, Campinas, Brazil
[2] Univ Fed Pernambuco, Dept Elect Engn, BR-50670901 Recife, PE, Brazil
来源：
2021 14TH IEEE INTERNATIONAL CONFERENCE ON INDUSTRY APPLICATIONS (INDUSCON) | 2021年
关键词：
electromagnetic transients; transmission towers; frequency-dependent soil; backflashover;
D O I：
10.1109/INDUSCON51756.2021.9529865
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Tower-footing grounding impedance has a fundamental impact on the generated overvoltages in power system when a transmission tower is hit by lightning. In order to compute accurately the tower-footing grounding impedance, the frequency dependence of soil electrical parameters (resistivity rho(g) and relative permittivity epsilon(r)) must be considered in the simulations. In this paper, a comparative analysis on the transient Ground Potential Rise (GPR) generated by a lightning subsequent return stroke buried into the frequency-independent (FI) and frequency-dependent (FD) soils is carried out. Results show a significant reduction in the voltage peaks of the generated GPR waveforms when a FD soil model is assumed for the simulations.
引用
收藏
页码：539 / 540
页数：2
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