Estimation of the minimum shielding failure flashover current for first and subsequent lightning strokes to overhead transmission lines

Datsios, Zacharias G.; Mikropoulos, Pantelis N.; Tsovilis, Thomas E.

doi:10.1016/j.epsr.2014.03.008

Cited by 46 publications

(24 citation statements)

References 24 publications

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“…The insulator string can be modeled as a voltage controlled switch connected to a parallel capacitor, as shown in Fig. 3 [14]. If the peak value of the lightning current exceeds a socalled critical current, the insulator experiences the flashover that closes the switch in parallel with the capacitor.…”

Section: Insulator String Flashover Characteristicmentioning

confidence: 99%

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Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System

Gholinejhad¹,

Shariatinasab²,

Sheshyekani³

2018

AEM

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This paper presents a probabilistic evaluation, based on Monte-Carlo method, for the estimation of insulation risk of failure of overhead transmission lines (TLs). The proposed method takes into account the wide-band model of towerfooting grounding system. The wide-band model of grounding system in frequency domain is obtained by the method of moment solution to the governing electrical field integral equations. The electrical parameters of soil are considered to be either constant or frequency dependent. The time-domain representation of the grounding system is inferred through pole-zero characterization of its associated frequency response. The case of a typical 400-kV transmission line is modelled in EMTP_RV with the towerfooting grounding system integrated with the transmission line (TL) system. The results of the paper show that the failure risk of transmission lines is affected by the grounding system model. This effect is more pronounced when the soil electrical parameters are assumed to be frequency dependent.

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Section: Insulator String Flashover Characteristicmentioning

confidence: 99%

“…In this paper, the integration method is used for evaluation the effect of non-standard lightning overvoltages. The integration method is expressed as follows [14]:…”

Section: Insulator String Flashover Characteristicmentioning

confidence: 99%

Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System

Gholinejhad¹,

Shariatinasab²,

Sheshyekani³

2018

AEM

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“…Different aspects of OHL modeling for fast front transients estimations are briefly discussed in [6][7][8][9][10][11]. Models of elements suggested in Japanese standard are discussed in [6].…”

Section: Introductionmentioning

confidence: 99%

Some aspects of overhead transmission lines lightning performance estimation in engineering practice

Banjanin

Savic

2015

Int. Trans. Electr. Energ. Syst.

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Summary The paper presents some aspects of overhead transmission lines (OHL) modeling for lightning overvoltages estimation in engineering practice. Different models of elements are compared, and sensitivity analysis is performed with the aim to investigate their influence to the OHL insulation stress due to lightning discharges. Elements are modeled according to international technical documents covering this field. Great influence of applied model of air flashover to the lightning current, sufficient to cause back flashover, is noticed. Calculation results obtained with different combinations of element models have been compared and large deviations are noticed. The models of elements for lightning overvoltages estimation should be carefully chosen to achieve reliable estimations. Constant resistance model of tower grounding and voltage‐time curve model of air breakdown must be avoided in calculations, despite the fact that they are suggested in many technical documents dealing with lightning overvoltages at OHL. Copyright © 2015 John Wiley & Sons, Ltd.

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“…Although the impact of lightning overvoltages to the OHLs has been considered since the first AC transmission lines were built, it has also been frequently discussed in recently published scientific papers [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Lightning protection of overhead transmission lines using external ground wires

Banjanin

Savic

Stojković

2015

Electric Power Systems Research

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Estimation of the minimum shielding failure flashover current for first and subsequent lightning strokes to overhead transmission lines

Cited by 46 publications

References 24 publications

Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System

Probabilistic Assessment of Lightning Related Risk of Transmission Lines Based on Frequency Dependent Modeling of Tower-Footing Grounding System

Some aspects of overhead transmission lines lightning performance estimation in engineering practice

Lightning protection of overhead transmission lines using external ground wires

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