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

Autor(es)

de Araujo, Anderson R. J. ; da Silva, Wagner C. ; Pissolato Filho, Jose ; Tsuzuki, MDG ; Pessoa, MAD

• Tipo de documento: Artigo Científico
• Fonte: 2021 14TH IEEE INTERNATIONAL CONFERENCE ON INDUSTRY APPLICATIONS (INDUSCON); v. N/A, p. 2-pg., 2021-01-01.

Resumo

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. (AU)

• Processo FAPESP: 19/01396-1 - Representação de torres convencionais e elevadas de linhas de transmissão diretamente no domínio do tempo para análises de transitórios eletromagnéticos
• Beneficiário: Anderson Ricardo Justo de Araújo
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado