Effect of Concentrated Tower Grounding System Modeling on the Minimum Backflashover Current and BFR of 150 and 400 kV Overhead Transmission Lines

2018 ◽  
Author(s):  
Z. G. Datsios ◽  
P. N. Mikropoulos ◽  
T. E. Tsovilis ◽  
S. I. Angelakidou
Keyword(s):  
Transmission Lines ◽  
System Modeling ◽  
Grounding System ◽  
Overhead Transmission Lines

scholarly journals Lightning Performance Evaluation of Italian 150 kV Sub-Transmission Lines

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2142
Author(s):  
Fabio Massimo Gatta ◽  
Alberto Geri ◽  
Stefano Lauria ◽  
Marco Maccioni ◽  
Francesco Palone
Keyword(s):  
Monte Carlo ◽  
Performance Evaluation ◽  
Transmission Lines ◽  
Computational Cost ◽  
Lightning Strikes ◽  
Grounding System ◽  
Monte Carlo Procedure ◽  
Overhead Transmission Lines ◽  
Realistic Assessment ◽  
Low Computational Cost

A significant majority of overhead transmission lines’ (OHLs) outages is due to backflashovers caused by direct lightning strikes: the realistic assessment of the lightning performance is thus an important task. The paper presents the analysis of the lightning performance of an existing 150 kV Italian OHL, namely, its backflashover rate (BFOR), carried out by means of an ATP-EMTP-based Monte Carlo procedure. Among other features, the procedure makes use of a simplified pi-circuit for line towers’ grounding system, allowing a very accurate reproduction of transient behaviours at a very low computational cost. Tower grounding design modifications, aimed at improving the OHL lightning performance, are also proposed and discussed.

Modeling of overhead transmission lines for trapped charge discharge rate studies

2021 ◽  
Vol 198 ◽  
pp. 107343
Author(s):  
J. Morales ◽  
J. Mahseredjian ◽  
I. Kocar ◽  
H. Xue ◽  
A. Daneshpooy
Keyword(s):  
Transmission Lines ◽  
Discharge Rate ◽  
Overhead Transmission Lines ◽  
Charge Discharge ◽  
Trapped Charge
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