Transient Analysis of Multiphase Transmission Lines Located above Frequency-Dependent Soils

Autor(es)

Garbelim Pascoalato, Taina Fernanda ^[1] ; Justo de Araujo, Anderson Ricardo ^[2] ; Caballero, Pablo Torrez ^[1] ; Leon Colqui, Jaimis Sajid ^[1] ; Kurokawa, Sergio ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Dept Elect Engn, BR-15385000 Ilha Solteira - Brazil

^[2] State Univ Campinas UNICAMP, Sch Elect & Comp Engn, BR-13083872 Campinas - Brazil

• Tipo de documento: Artigo Científico
• Fonte: ENERGIES; v. 14, n. 17 SEP 2021.
• Citações Web of Science: 0

Resumo

This paper evaluates the influence of frequency-dependent soil conductivity and permittivity in the transient responses of single- and double-circuit transmission lines including the ground wires subjected to lightning strikes. We use Nakagawa's approach to compute the ground-return impedance and admittance matrices where the frequency-dependent soil is modeled using Alipio and Visacro's model. We compare some elements of these matrices with those calculated by Carson's approach which assumes the frequency constant. Results show that a significant difference can be obtained in high resistive soils for these elements in impedance and admittance matrices. Then, we compute the transient responses for single- and double-circuit lines with ground wires located above soils of 500, 1000, 5000, and 10,000 omega center dot m considering the frequency constant and frequency-dependent parameters generated for two lightning strikes (subsequent stroke and Gaussian pulse). We demonstrate that the inclusion of frequency dependence of soil results in an expressive reduction of approximately 26.15% and 42.75% in the generated voltage peaks in single- and double-circuit lines located above a high-resistive soil. These results show the impact of the frequency-dependent soils that must be considered for a precise transient analysis in power systems. (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
• Processo FAPESP: 20/10141-4 - Influência das características eletromagnéticas do solo nas respostas transitórias que ocorrem em linhas de transmissão de energia elétrica
• Beneficiário: Tainá Fernanda Garbelim Pascoalato
• Modalidade de apoio: Bolsas no Brasil - Doutorado