Results 21 to 30 of about 1,777 (189)

Simulation Analysis of Three Phase Unbalanced Current and Over Compensation of High Voltage Reactor in Transmission Line

open access: yes南方能源建设, 2021
[Introduction] The safe and stable operation of UHV transmission lines is essential to the safety of power grids. When the new substation deconstructs the original long line in the power grid planning and construction, the following problems, such as the
ZHENG Xing, CHEN Yipeng, QI Donghui
doaj   +1 more source

Tower grounding improvement versus line surge arresters: comparison of remedial measures for high-BFOR subtransmission lines [PDF]

open access: yes, 2015
This paper presents a technical/economic comparison between remedial measures aimed at improving the lightning performance of an existing Italian three-phase 150-kV overhead line.
GATTA, Fabio Massimo   +4 more
core   +1 more source

Identify Direct Lightning Strike Location Based on Discrete Wavelet Transform for 115-kV Transmission System

open access: yesIEEE Access, 2022
This paper proposes three techniques for locating lightning strikes in a 115 kV transmission system over 88.5 km, based on the arrival time of a transient wave obtained from a discrete wavelet transform (DWT).
Pathomthat Chiradeja   +1 more
doaj   +1 more source

Monte Carlo evaluation of the impact of subsequent strokes on backflashover rate [PDF]

open access: yes, 2015
The paper deals with the impact of subsequent strokes on the backflashover rate (BFR) of HV overhead transmission lines (OHLs), assessed by means of an ATP-EMTP Monte Carlo procedure.
Gatta, Fabio Massimo   +3 more
core   +1 more source

An equivalent circuit for the evaluation of cross-country fault currents in medium voltage (MV) distribution networks [PDF]

open access: yes, 2018
A Cross-Country Fault (CCF) is the simultaneous occurrence of a couple of Line-to-Ground Faults (LGFs), affecting different phases of same feeder or of two distinct ones, at different fault locations.
Gatta, Fabio Massimo   +3 more
core   +1 more source

Simulation of electromagnetic influence of railway overhead contact system on disconnected transmission lines by the ATP-EMTP programme [PDF]

open access: yesVestnik MGTU, 2016
This paper is devoted to experimental and calculating research of induced voltage on disconnected transmission lines caused by the influence of AC railway overhead contact system.
Zalesova O. V.
doaj   +1 more source

An Effective EMTR-Based High-Impedance Fault Location Method for Transmission Lines

open access: yes, 2020
This paper summarizes the electromagnetic time reversal (EMTR) technique for fault location, and further numerically validates its effectiveness when the fault impedance is negligible. In addition, a specific EMTR model considering the fault impedance is
An, Jianwei   +3 more
core   +1 more source

Overview of Transient Simulations of Grounding Systems under Surge Conditions

open access: yesEnergies, 2022
The present paper gives an overview of modelling methods of standard grounding systems under surge conditions, using the non-uniform transmission line approach.
Tomasz Kisielewicz, Milton Cuenca
doaj   +1 more source

Investigation of overvoltage on square, rectangular and L-shaped ground grids of high voltage substations by ATP/EMTP [PDF]

open access: yes, 2021
Ground grid system is important for preventing the hazardous effects of overvoltage in high voltage substations due to fault current perhaps from lightning strike or device malfunction.
Luewattana, Krung, Rattanasena, Paweena
core   +3 more sources

Modelling of a 400-kV MSCDN reactor for computation of voltage and field distributions during switching transients [PDF]

open access: yes, 2018
In this paper, a model for the reactor of a 400-kV mechanically switched capacitor with damping network (MSCDN) based on an equivalent circuit representation is developed.
Abdul Hamid, Haziah   +3 more
core   +2 more sources

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