Determination of rail conductor characteristics for electromagnetic interference studies

Liu, J.; Dawalibi, F.P.; Yang, Yixin; Ma, Jianjun; Southey, Robert

doi:10.1109/elmagc.2002.1177450

Cited by 5 publications

(2 citation statements)

References 7 publications

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“…The alternating current resistance of the iron tower material is greater than its direct current resistance due to the skin effect. The high-frequency resistance can be calculated using Equation ( 5) [13] .…”

Section: Characteristics Of Grounding Impedance Under High Frequenciesmentioning

confidence: 99%

Analysis of the correlation between the impedance value of line surge arresters' grounding electrode and the withstand lightning voltage of insulator strings under shielding failure

Fang,

Jiang,

Yang

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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The current operation of high-voltage transmission lines falls short of achieving the desired level of lightning protection through the mere installation of a substantial number of zinc oxide surge arresters. In order to address this challenge, the conventional design approach involves validating the insulation coordination margin of both surge arresters and insulator strings under lightning impulses. However, this method still proves inadequate in establishing effective safeguards against flashovers and tripping. This study takes a departure point from the discharge pathway of surge arresters, analyzing the trajectory of lightning currents and the impact of the line tower's equivalent inductance on the cumulative voltage across insulator strings. It is revealed that the potential, which elevates due to wave impedance during surge arrester grounding, plays a pivotal role in withstanding overvoltage in insulator strings. The study introduces measures involving waveguide cables to mitigate residual voltage at tower poles. By modifying tower wave impedance values, the shielding failure lightning-induced tripping rate of power transmission lines can be effectively curtailed.

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Section: Characteristics Of Grounding Impedance Under High Frequenciesmentioning

confidence: 99%

Analysis of the correlation between the impedance value of line surge arresters' grounding electrode and the withstand lightning voltage of insulator strings under shielding failure

Fang,

Jiang,

Yang

et al. 2024

Eighth International Conference on Energy System, Electricity, and Power (ESEP 2023)

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show abstract

“…Some authors [12] approach the electromagnetic interference between power grids and neighbouring metalic structures, by proposing the construction of a database to contain the corresponding values of the relative magnetic permeabilities of the metalic parts and the values of the induced electrical currents on different frequencies, both in a normal function of the power grids, and in mallfunction conditions. Thus, a reconsideration of the relative magnetic permeability, in an approximation close to the reality, leads also to relevant estimations of the electrical interference values that are to be identified.…”

Section: Electromagnetic Interference Studymentioning

confidence: 99%

Numerical interpolation methods applied in electromagnetic interference problems

Micu¹,

Ceclan²,

Lıngvay³

et al. 2008

REPQJ

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In the paper are evaluated the induced potential in pipeline based on the subdivision of the zone of influence AC Power Lines / electric traction line / gas pipeline, in a relatively great number of sections in order to be able to determine voltages at many positions along the gas pipeline. Is presented a practical case from Cluj, of subdivision of the zone of influence in sections (a circuit model) and is created a special interpolation algorithm for the precise calculation of the induced voltages values in different points on the pipeline taking into account the measured data. Because there are only a set of available reactance measurements, for a continuous function between the magnetic permeability and electrical induced currents, it is necessary to apply numerical interpolation methods and/or nonlinear curve fitting procedures.

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Evaluation and Mitigation of Electromagnetic Interference Between Railways and Nearby Power Lines: A Review

Wang

Adajar

2021

IEEE Access

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Determination of rail conductor characteristics for electromagnetic interference studies

Cited by 5 publications

References 7 publications

Analysis of the correlation between the impedance value of line surge arresters' grounding electrode and the withstand lightning voltage of insulator strings under shielding failure

Analysis of the correlation between the impedance value of line surge arresters' grounding electrode and the withstand lightning voltage of insulator strings under shielding failure

Numerical interpolation methods applied in electromagnetic interference problems

Evaluation and Mitigation of Electromagnetic Interference Between Railways and Nearby Power Lines: A Review

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