Alternative Methods to Calculate Electromagnetic Transients in Grounding Systems

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dc.contributor.authorColqui, Jaimis S. L.
dc.contributor.authorDe Araujo, Anderson R. J.
dc.contributor.authorKurokawa, Sergio
dc.contributor.authorSeixas, Claudiner M.
dc.contributor.institutionDept. of Electrical Engineering
dc.contributor.institutionFederal Institute of Saõ Paulo Votuporanga
dc.date.accessioned2022-04-28T19:28:29Z
dc.date.available2022-04-28T19:28:29Z
dc.date.issued2019-09-01
dc.description.abstractGrounding electrodes are essential in electrical power system to maintain a reliable operation, and to guarantee the safety of personnel and equipment. When a lightning strikes at a transmission tower, surge current waves travel to the foundations of the structure which are partially absorbed by the grounding impedance. As a consequence, the electrical potential increases in relation to a remote reference, which is named Grounding Potential Rising (GPR). These curves are very important to verify if the step voltages are in accordance with specific standards to guarantee a safety conditions during the transient state. In this paper, impedance of some grounding systems are calculated by classic models for a large frequency range, varying in different lengths and buried in homogeneous soils. Then, the GPR curves are by two recursive methods directly in time domain. These methods applies Vector Fitting technique on each grounding impedance response, where the poles and residues are obtained. Then, employing the recursive convolution and trapezoidal method, the GPR are computed directly in time domain. These curves are compared with the classic Numerical Laplace Transform (NLT) which have shown a good agreement with the recursive methods.en
dc.description.affiliationSaõ Paulo State University Dept. of Electrical Engineering
dc.description.affiliationFederal Institute of Saõ Paulo Votuporanga
dc.identifierhttp://dx.doi.org/10.1109/SIPDA47030.2019.8951540
dc.identifier.citation2019 15th International Symposium on Lightning Protection, SIPDA 2019.
dc.identifier.doi10.1109/SIPDA47030.2019.8951540
dc.identifier.scopus2-s2.0-85079051215
dc.identifier.urihttp://hdl.handle.net/11449/221433
dc.language.isoeng
dc.relation.ispartof2019 15th International Symposium on Lightning Protection, SIPDA 2019
dc.sourceScopus
dc.subjectelectromagnetic transients
dc.subjectgrounding electrodes
dc.subjectlightning
dc.subjectrecursive methods
dc.titleAlternative Methods to Calculate Electromagnetic Transients in Grounding Systemsen
dc.typeTrabalho apresentado em evento

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