Simulation of induced voltages generated by the “Wire-Earth” power lines

When operating on the disconnected overhead power lines, near which the operating OPL are located, electrical personnel can be electrocuted or shocked due to the effects of induced voltages exceeding the permissible levels. The magnitudes of these voltages are determined by electrical and magnetic e...

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Bibliographic Details
Main Authors: Buyakova, Natalia, Kryukov, Andrey, Nguen, Ty, Cherepanov, Aleksandr
Format: Conference Proceeding
Language:English
Subjects:
Electrical grounding
Electrical safety
Electrocutions
Magnetic effects
Personnel
Power lines
Single wires
Switches
Online Access:Get full text
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Summary:When operating on the disconnected overhead power lines, near which the operating OPL are located, electrical personnel can be electrocuted or shocked due to the effects of induced voltages exceeding the permissible levels. The magnitudes of these voltages are determined by electrical and magnetic effects of the energized lines. In the presence of galvanic connections to the ground, the magnetic influence often becomes predominant due to the appearance of longitudinal EMF in closed circuits due to the alternating magnetic field. The highest EMFs occur when significant currents are flowing in the ground, which is characteristic of single-wire PL that use the ground as a return conductor. Such lines can be used in power supply systems of agricultural consumers, as well as to provide electricity to facilities located in areas remote from electric energy systems (EES) networks. To ensure the electrical safety of personnel when working on disconnected lines located in areas of high electromagnetic influence of operating PL, special actions based on the use of fixed and portable earthing switches shall be taken. Under the conditions of the currently performed digital transition in the power engineering, the selection of such actions should be carried out using computer models that ensure the correct consideration of all factors affecting the induced voltages. Such technologies can be generated based on EES methods and modeling means, developed in the Irkutsk State University for Railroads Communications. This article presents the results of computer research aimed at developing a methodology for determining the induced voltages generated by “wire-ground” power lines.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0138709