Lightning protection of overhead transmission lines using external ground wires

Banjanin, Mladen; Savic, Milan; Stojković, Zlatan

doi:10.1016/j.epsr.2015.06.001

Cited by 23 publications

(8 citation statements)

References 14 publications

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“…It should be noted that with maximum lightning current of 215 kA, according to (5), d is equal to 10 × 215 0.65 = 0.328 km. Based on the number of lightning strokes to phase conductor and shield wire, by using (6) and (7), SFFOR is equal to 0.9602 flashes/100 km year and BFR is 10.12 flashes/100 km year. It is worth noting that the obtained result for SFFOR is close to the reported value by West Regional Electric Company.…”

Section: Using One Shield Wirementioning

confidence: 99%

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Monte‐Carlo‐based simulation and investigation of 230 kV transmission lines outage due to lightning

et al. 2020

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Here, using the probabilistic evaluation based on the Monte Carlo method, back-flashover rate and shielding failure flashover rate of 230 kV overhead transmission lines in the western regions of Iran are evaluated. To such an aim, first, the number of thunderstorm days per year is collected from the reported weather information in order to determine the ground flash density. Then, using MRU-200 equipment, the tower-footing resistance of several towers is measured. Matlab® software is used in order to produce lightning surges considering its probabilistic nature and randomly distribution on the ground to evaluate striking distance based on the geometric model. Then, calculated parameters are transferred to EMTP-RV software by establishing a link to perform the transient simulation and report the results for modelled 230 kV transmission line. Finally, considering IEEE-1243 standard, it is shown that due to high ground flash density, using 230 kV tower with one shield wire is not sufficient to protect the line against lightning phenomena.

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Section: Using One Shield Wirementioning

confidence: 99%

“…A review of the literature shows that extensive studies have been carried out on the lightning performance of the transmission lines in order to improve the performance of the lightning protection [3][4][5][6][7]. In [2][3][4][5], simple linear or nonlinear resistors have been used to model the grounding system.…”

Section: Introductionmentioning

confidence: 99%

Monte‐Carlo‐based simulation and investigation of 230 kV transmission lines outage due to lightning

et al. 2020

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“…3. The improvement of the system lightning performance for the rest of the three configurations, which use surge arresters, are analyzed by repeating step (2). In addition, the performance of the surge arresters is recorded.…”

Section: Fig 22 a One-line Diagram With Four Different Configurationsmentioning

confidence: 99%

“…There are several methods to reduce the lightning related outages on high voltage transmission lines. The optimal shielding design was presented in [1], while Mladen S.Banjanin [2] proposed a new method of using external ground wires to improve lightning protection of transmission lines. The risk of lightning outages of transmission lines was introduced by Armstrong and whitehead [3].…”

Section: Introductionmentioning

confidence: 99%

Optimal Surge Arrester Placement for Extra High Voltage Substation

Rao*,

Kalyani,

Charan

2019

IJEAT

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Lighting Phenomena is one of the important considerations during the design of Extra High Voltage and Ultra High Voltage Transmission Lines. Most of the authors have discussed regarding the benefits of using Surge Arresters as a way to improve the performance. In this paper, simulation analysis is done on 400kV/220kV Gwaka Substation, AP, India for optimal, cost effective placement of surge arresters. The most difficult configuration has been identified. A new method of “Voltage-Distance curve” is proposed to evaluate different Surge Arrester installation configurations. Finally the way to determine the optimal surge arrester configuration for each line section is then introduced in this paper.

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“…So, it is important to perform the accurate modeling of grounding system for calculation the lightning performance of TLs. Usually, a simple linear or nonlinear resistance is conventional for modeling of tower footing resistance (Araújo et al, 2015;Banjanin, Savić, & Stojković, 2015;Mamiş, Keleş, Arkan, & Kaya, 2016;Shariatinasab et al, 2014;Tossani et al, 2015). In conventional modeling, the magnitude of tower footing resistance is only varied with the lightning current magnitude flowing through the tower footing into the ground.…”

Section: Introductionmentioning

confidence: 99%

The effect of grounding system modeling on lightning-related studies of transmission lines

Shariatinasab¹,

Gholinezhad²

2017

Journal of Applied Research and Technology

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Un-accurate modeling of power system may cause to under or over-design the insulation, which in turn, leads to increase in the investment and/or maintenance cost of the network protection against lightning overvoltages. The grounding system is an effective parameter on the magnitude of the lightning overvoltages and insulation coordination of high voltage transmission lines (TLs). This paper presents a comprehensive evaluation of the effect of grounding electrode impedance on the estimation of overvoltages caused by lightning strokes, in which both the vertical and non-vertical strokes are considered. In the presented study, static and wide-band model of the tower-footing grounding system is adopted assuming the soil electrical parameters to be either constant or frequency dependent. Also, the effect of modeling type of grounding system is considered on the TLs' reliability indices. The study was performed on a typical 400-kV transmission line which is modeled in EMTP-RV. From the simulation results, it is found that the outage rate of TLs is markedly affected by the model of the tower footing grounding system. This effect is more pronounced when the soil electrical parameters are frequency dependent. It is also concluded that, in addition to the lightning overvoltages, the unavailability of the TLs is significantly affected by wide-band model of grounding system, non-vertical lightning strokes and soil resistivity.

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Lightning protection of overhead transmission lines using external ground wires

Cited by 23 publications

References 14 publications

Monte‐Carlo‐based simulation and investigation of 230 kV transmission lines outage due to lightning

Monte‐Carlo‐based simulation and investigation of 230 kV transmission lines outage due to lightning

Optimal Surge Arrester Placement for Extra High Voltage Substation

The effect of grounding system modeling on lightning-related studies of transmission lines

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