Transient analysis of multiphase transmission lines located above frequency-dependent soils

dc.contributor.authorPascoalato, Tainá Fernanda Garbelim [UNESP]
dc.contributor.authorde Araújo, Anderson Ricardo Justo
dc.contributor.authorCaballero, Pablo Torrez [UNESP]
dc.contributor.authorColqui, Jaimis Sajid Leon [UNESP]
dc.contributor.authorKurokawa, Sérgio [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversidade Estadual de Campinas (UNICAMP)
dc.description.abstractThis paper evaluates the influence of frequency-dependent soil conductivity and permittiv-ity 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 Alípio 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 Ω·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.en
dc.description.affiliationDepartment of Electrical Engineering São Paulo State University (UNESP)
dc.description.affiliationSchool of Electrical and Computer Engineering State University of Campinas (UNICAMP)
dc.description.affiliationUnespDepartment of Electrical Engineering São Paulo State University (UNESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCAPES: 001
dc.description.sponsorshipIdFAPESP: 2019/01396-1
dc.description.sponsorshipIdFAPESP: 2020/10141-4
dc.identifier.citationEnergies, v. 14, n. 17, 2021.
dc.subjectElectromagnetic transient analysis
dc.subjectGround-return admittance
dc.subjectGround-return impedance
dc.subjectTransmission lines
dc.titleTransient analysis of multiphase transmission lines located above frequency-dependent soilsen