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Tainá Fernanda Garbelim Pascoalato
Departamento de Engenharia Elétrica, UNESP, Ilha Solteira, SP
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Sérgio Kurokawa
Departamento de Engenharia Elétrica, UNESP, Ilha Solteira, SP
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Anderson Ricardo Justo de Araújo
Faculdade de Engenharia Elétrica e de Computação, UNICAMP, Campinas, SP
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José Pissolato Filho
Faculdade de Engenharia Elétrica e de Computação, UNICAMP, Campinas, SP
Keywords:
electromagnetic transient, transmission lines, phase conductors, tilt angle, frequency-dependent soils
Abstract
This article analyzes the influence of the tilt angle of phase conductors in three-phase transmission lines (TLs). In this study, ground-return impedance and admittance are calculated by the Nakagawa’s approach, considering soils with conductivity of 0.01 and 0.001 S/m. The modal attenuation constant and the modal propagation velocity are calculated between 100 Hz to 10 MHz, for 5 different angles (0°, 30°, 45°, 60° and 90°). The transient voltages were calculated for two disturbances (energization and lightning strike) applied to one of the phases while the receiving terminal is left open. The results show that the voltages generated in the excited phases are not significantly affected by the tilt angle. However, the induced voltages in the non excited phases show significant variation as a function of this angle.
