On the Effects of EMI and the Soil Structure on Transmission Line Parameters — Part I: Theoretical Model

Moraes, Caio M.; Martins-Britto, Amauri G.; Lopes, Felipe V.; Silva, Kleber M.; Ribeiro, Eduardo P. A.; Rodrigues, Marcos Vinícius

doi:10.1109/wcnps53648.2021.9626326

Cited by 2 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Shunt admittances do not present signicant discrepancies, due to the fact that, at power system frequencies, the capacitance is independent of the interfered pipeline buried beneath the ground, due to the shielding eect of the intrinsically conductive earth layer, as documented by Moraes et al (2021a). The Method I accuracy is aected by the presence of the EMI.…”

Section: Emtp/atp Equivalent Systemmentioning

confidence: 96%

Influences of Electromagnetic Interferences on Two-Terminal Impedance-Based Fault Location Methods

Moraes

Martins-Britto

Lopes

et al. 2022

Proceedings IX Simpósio Brasileiro De Sistemas Elétricos

View full text Add to dashboard Cite

Faults during transmission line operations are prone to occur, which reinforces the need for protection instruments to ensure the safety of facilities involved and, in case of power outages, to restore the energy supply in the least amount of time as possible. In this context, two terminal impedance-based fault locators are widely used in real installations, since they overcome limitations of single-terminal approaches. In this paper, a study is carried out to evaluate the performance of four classical fault location methods in a transmission system subjected to electromagnetic interferences (EMI). An overhead power line with 334 km is exposed to a hypothetical case of electromagnetic inuence due to inductive coupling with a 28" underground pipeline. The system is modeled using the well-known Alternative Transients Program (ATP) and phase-to-ground faults are simulated, varying fault resistances and locations, in order to obtain a parametric response. Results show that fault location methods based on series impedances, propagation constants and characteristic impedances underperform in situations which the EMI are neglected, presenting errors as large as 60 km. However, methods that do not rely on line parameters show signicantly improved accuracy and great robustness with respect to external EMI, presenting fault location estimation errors of only 5%.

show abstract

Section: Emtp/atp Equivalent Systemmentioning

confidence: 96%