Analysis the effect of an ocean-land mixed propagation path on the induced voltage in overhead lines due to inclined lightning

2022 ◽  
Vol 206 ◽  
pp. 107799
Author(s):  
A.Foroughi Nematollahi ◽  
B. Vahidi
Keyword(s):  
Propagation Path ◽  
Induced Voltage ◽  
Overhead Lines

scholarly journals Full-Wave Analysis of Field-to-Line Coupling Effects Using 1D FDTD Method under Exciting Source with Different Bandwidths

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Qi Zhang ◽  
Bihua Zhou ◽  
Jianbao Wang ◽  
Cheng Gao
Keyword(s):  
Fdtd Method ◽  
Line Length ◽  
Maximum Energy ◽  
Stratified Medium ◽  
Induced Voltage ◽  
Coupling Effects ◽  
Absorbing Boundary ◽  
Bell Laboratory ◽  
Overhead Lines ◽  
Line Coupling

With the aim to analyze field-to-line coupling effects based on energy spectrum, parallel finite-difference time-domain (FDTD) method is applied to calculate the induced voltage on overhead lines under high-power electromagnetic (HPEM) environment. Firstly, the energy distribution laws of HEMP (IEC 61000-2-9), HEMP (Bell Laboratory), HEMP (Paulino et al., 2010), and LEMP (IEC61000-4-5) are given. Due to the air-earth stratified medium, both the absorbing boundary and the connecting boundary applied to scattering by finite-length objects are separately set in aerial and underground parts. Moreover, the influence of line length on induced voltage is analyzed and discussed. The results indicate that the half-peak width is wider with the increase of the line length. But the steepness of induced voltage on the overhead line is invariable. There is no further increase in the peak of induced voltage especially when the line length increases to be equivalent to the wavelength of the frequency bands with the maximum energy.

About safety when working on overhead lines under induced voltage to reduce electrical injuries

2020 ◽  
pp. 822-822
Author(s):  
O. S. Shcherbacheva ◽  
I. V. Korolev ◽  
D. A. Burdyukov
Keyword(s):  
Induced Voltage ◽  
Overhead Lines ◽  
Electrical Injuries

The basic requirements to ensure the safety of work under induced voltage are systematized, as well as recommendations to reduce electrical injuries when performing work on disconnected overhead lines under induced voltage are given

scholarly journals Determination of Electromagnetic Influence of 25 kV AC Electric Traction Network on 10 kV High-Voltage Overhead Line

2021 ◽  
Vol 2096 (1) ◽  
pp. 012078
Author(s):  
O V Zalesova
Keyword(s):  
High Voltage ◽  
Short Circuit ◽  
Electrical Equipment ◽  
Point Of View ◽  
Overhead Line ◽  
Induced Voltage ◽  
Operating Personnel ◽  
Overhead Lines ◽  
Traction Network ◽  
Electrified Railways

Abstract Electrified railways include a system of cable and overhead lines. An analysis of the operation of alternating current (AC) electrified railways sections shows that the value of the induced voltage caused by the operation of the traction network can significantly exceed the permissible level on adjacent disconnected high-voltage overhead lines. As a consequence, this leads to serious injuries to operating personnel, including deaths, failure of electrical equipment. From this point of view, 1x25 kV 50 Hz AC railway system networks are considered the most dangerous. The electromagnetic influence of the traction network of a double-track section of an AC railway on an adjacent 10 kV high-voltage overhead line for power supply of automatic block signalling is investigated in the offered paper. Emergency cases of traction network operation are considered: short-circuit situation and forced state. The calculations of short-circuit currents in the influencing inter-substation zone, as well as estimation of the induced voltage on the wires of the 10 kV disconnected high-voltage overhead line for various schemes of grounding, have been performed. The investigations were carried out on models built using the ATP-EMTP program.

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