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Transient analysis of multiphase transmission lines located above frequency-dependent soils
(2021-09-01)
This 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 ...
Analysis of transient voltages and currents in short transmission lines on frequency-dependent soils☆
(2021-05-01)
Accurate modeling of overhead transmission lines (OHTLs) for transient analysis require that the ground which the phase conductors are suspended be considered on the longitudinal impedance and transversal admittance matrices. ...
Computation of Surge Voltage in Transmission Tower Located above Frequency-Dependent Soil
(2021-01-01)
The purpose of this paper is to investigate the influence of frequency-dependent soils with variable soil content on the transient voltages at transmission towers. First, a comparative analysis between the impedance of ...
Avaliação dos limites de aplicação da teoria de linhas de transmissão para o cálculo de transitórios eletromagnéticos em cabos subterrâneos utilizando o FDTD
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA ELÉTRICAPrograma de Pós-Graduação em Engenharia ElétricaUFMG, 2022-07-13)
This thesis evaluates the validity of transmission line theory for calculating of electromagnetic transients on underground cable systems. Using a rigorous methodology based on the solution of Maxwell's equations with the ...
An analysis of frequency-dependent soil models: Influence on the transient responses
(2021-08-15)
Longitudinal impedance and transversal admittance of overhead transmission line (OHTL) are dependent on the ground which the line conductors are located. Several models in the literature consider the soil as an ideal ...
A Comparison of Frequency-Dependent Soil Models: Electromagnetic Transient Analysis of Overhead Transmission Lines Using Modal Decomposition
(2022-03-01)
This article investigates the influence of four causal frequency-dependent (FD) soil models and their impact on the responses of a multiphase overhead transmission line (OHTL) with ground wires, generated by a lightning ...
Implementação do modelo ULM na plataforma ATP para o estudo de transitórios em linhas de transmissão aéreas com configuração assimétrica
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA ELÉTRICAPrograma de Pós-Graduação em Engenharia ElétricaUFMG, 2019-12-09)
This dissertation investigates the simulation of transients in asymmetrical overhead line configurations considering the Universal Line Model (ULM) and a more rigorous modeling of the ground effect in the calculation of ...
Transient Analysis on Multiphase Transmission Line Above Lossy Ground Combining Vector Fitting Technique in ATP Tool
(Ieee-inst Electrical Electronics Engineers Inc, 2022-01-01)
Several approaches to calculate the ground-return impedance and admittance matrices are proposed in the literature. Carson's approach assumes a lossy ground modeled by frequency-independent conductivity where displacement ...
Transient Responses on Transmission Lines Located above Frequency-Dependent Soil with Variable Water Content
(2021-01-01)
This paper investigates the influence of frequency-dependent soil parameters with variable water content in the transient responses of single-circuit three-phase transmission line (TL) subjected to lightning subsequent ...