Modeling flashover of AC outdoor insulators under contaminated conditions with dry band formation and arcing

Liu, Bo; Gorur, R.S.

doi:10.1109/tdei.2012.6215110

Cited by 35 publications

(22 citation statements)

References 20 publications

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“…Therefore, dry-band forms and develops once more due to drying of LC. The arc length is gradually increased and finally depends on the pollution level lead to flashover [37,38].…”

Section: Dynamic Model Under Uniform Pollution Layermentioning

confidence: 99%

Leakage current analysis of polymeric insulators under uniform and non‐uniform pollution conditions

Ahmadi-Joneidi

Akmal

Mohseni

2017

IET Generation, Transmission & Distribution

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“…Therefore, dry-band forms and develops once more due to drying of LC. The arc length is gradually increased and finally depends on the pollution level lead to flashover [37,38].…”

Section: Dynamic Model Under Uniform Pollution Layermentioning

confidence: 99%

Leakage current analysis of polymeric insulators under uniform and non‐uniform pollution conditions

Ahmadi-Joneidi

Akmal

Mohseni

2017

IET Generation, Transmission & Distribution

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“…For example, considering the factors such as the tower and the different phase conductors, a full-scale simulation model was established to study the electric field electric field distribution characteristics of insulators, and the calculation results were closer to the real condition [6]. The influence of corona rings with different structural parameters on the electric field distribution of insulators was studied, and the parameters of corona rings were optimized to make the electric field along the insulators uniform [7].The influences of the operating environment on the electric field distribution of insulators were studied, such as icing [8], sand dust [9], bird droppings [10], surface contamination layer [11], dry zone [12], separated globules [13], and so on. It was further clarified that the operating environment plays an important role in the safe operation of insulators.…”

Section: Introductionmentioning

confidence: 99%

Influence of Partial Arc on Electric Field Distribution of Insulator Strings for Electrified Railway Catenary

Zhao

Zhang

et al. 2019

Energies

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The occurrence of a partial arc can affect insulation properties of the insulator by different types of flashover. In order to investigate the influence of a partial arc on electric field distribution along the catenary insulator string, a three-dimensional model of the cap-pin insulator string with partial arc was established in this paper. The electric field distribution along the insulator string when the arc extended on the insulator surface and bridged sheds was investigated based on the electric field analysis using the finite element method. The results showed that the occurrence of a partial arc caused obvious distortion of the electric field, which was a two-dimensional axis symmetrical field before arcing to a three-dimensional field. In the case of arc extension, the sudden rise of field intensity was mostly at the rib and the shed edge, which had the local maximum field intensity. The rib and the shed edge played a certain hindrance role in the extension of the arc. The main reason for promoting the development of the arc can be attributed to thermal ionization. In the case of arc bridge sheds, the highest field intensity appeared at the edge of the last bridged shed. As the number of sheds arc-bridged increased, the maximum field intensity also increased. As the arc length increased, the electric field intensity of the arc head also increased, which resulted in an accelerated arc development. The main factor to promote the development of the arc can be attributed to electrical breakdown. The measures to hinder the rapid development of partial arcs were proposed.

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“…Mayr's differential equation was used to analyze the discharge performance under AC current. The developed dynamic discharge model presented by Gorur took into account the Hampton criterion, insulator geometry, and surface wettability [12,13]. Dhahabi and Beroual proposed the equivalent impedance of dynamic discharge in series with pollution resistance as a propagation criterion under AC voltage [14].…”

Section: Introductionmentioning

confidence: 99%

Dynamic model to predict AC critical flashover voltage of nonuniformly polluted insulators under thermal ionization conditions

Shahabi¹,

Gholami²

2017

Turk J Elec Eng & Comp Sci

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Modeling flashover of AC outdoor insulators under contaminated conditions with dry band formation and arcing

Cited by 35 publications

References 20 publications

Leakage current analysis of polymeric insulators under uniform and non‐uniform pollution conditions

Leakage current analysis of polymeric insulators under uniform and non‐uniform pollution conditions

Influence of Partial Arc on Electric Field Distribution of Insulator Strings for Electrified Railway Catenary

Dynamic model to predict AC critical flashover voltage of nonuniformly polluted insulators under thermal ionization conditions

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