Effect of combined AC and lightning-induced overvoltages on the risk of MV insulator flashovers above lossy ground

Mahmood, Farhan; Sabiha, Nehmdoh A.; Lehtonen, Matti

doi:10.1016/j.epsr.2015.05.016

Cited by 9 publications

(3 citation statements)

References 25 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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“…Determining the parameters of the expected atmospheric surges is important in the context of the selection of surge protection devices [11,12]. There are also different methods to coordinate overhead line insulation and surge protection devices [13,14]. Medium-voltage networks are very sensitive to atmospheric overvoltages [15].…”

Section: Introductionmentioning

confidence: 99%

Influence of Spark Gap Parameters on the Strength of the Surge Protection Device and the Method of Its Selection

Borecki

2023

Energies

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The paper aims to analyze the factors affecting the parameters of surge protection devices with a spark gap and assess the impact of changing these parameters on the level of overhead line strength. For this purpose, this paper contains the results of tests that show the assessment of the impact of changing the spark gap parameters on the voltage–time characteristics of selected protection devices in the range of negative and positive polarity. The paper presents how the change in the parameters of the component element of the surge protection device, which is the spark gap, may affect the selection of the line surge protection method. In addition, the paper presents a method of assessing the strength of an overhead line, taking into account the case of installing surge protection devices at the insulators. The implementation of these tests supports further activities aimed at the actual values of parameters affecting the strength of overhead lines.

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Risk-based insulation coordination studies for protection of medium-voltage overhead lines against lightning-induced overvoltages

2019

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Effect of combined AC and lightning-induced overvoltages on the risk of MV insulator flashovers above lossy ground

Cited by 9 publications

References 25 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

Influence of Spark Gap Parameters on the Strength of the Surge Protection Device and the Method of Its Selection

Risk-based insulation coordination studies for protection of medium-voltage overhead lines against lightning-induced overvoltages

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