AC pollution flashover performance and flashover process of glass insulators at high altitude site

Jiang, Xingliang; Xiang, Ze; Zhang, Zhijin; Hu, Jianlin; Hu, Qin; Shu, Lichun

doi:10.1049/iet-gtd.2013.0328

Cited by 18 publications

(7 citation statements)

References 20 publications

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“…5 and 6, DC flashover voltage of iced insulators declines in a power function law as pollution level increases, whose variation tendency is similar to that in pollution flashover tests. Similarly, the relationship between the flashover voltage of ice‐covered insulators and pollution severity is also expressed as [24–26]

U_{50} = A_{s} \times SD D^{- a}

U_{50} = B_{γ} \times γ_{20}^{- b}

where A s and B r are coefficients related to the pollution degree, icing state and geometry of insulator and atmospheric pressure, and so on; SDD and γ 20 are SDD and applied water conductivity, respectively; a and b are characteristic exponents characterising the influence of pollution level on U 50 .…”

Section: Test Results and Analysesmentioning

confidence: 99%

DC flashover performance of ice‐covered insulators under complex ambient conditions

Jiang

Shu

et al. 2016

IET Generation, Transmission & Distribution

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U_{50} = A_{s} \times SD D^{- a}

U_{50} = B_{γ} \times γ_{20}^{- b}

Section: Test Results and Analysesmentioning

confidence: 99%

DC flashover performance of ice‐covered insulators under complex ambient conditions

Jiang

Shu

et al. 2016

IET Generation, Transmission & Distribution

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“…[58], [59], [61], [62], [66], [68 -72], [74], [76][77][78][79], [84 -87], [90][91][92], [96], [98], [100], [116], [26], [29], [33], [37], [41], [44],…”

Section: B Eligible Studies Characteristicsmentioning

confidence: 99%

Pollution Flashover Voltage of Transmission Line Insulators: Systematic Review of Experimental Works

et al. 2022

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Over the past decades, extensive experimental-based research works have been carried out to investigate the flashover phenomenon on the performance of polluted transmission line insulators. The critical focus has been on developing methods that can determine the safety, reliability, and sustainability of the overall power transmission network based on experimental results obtained from polluted insulators' flashover voltage tests. In this paper, a systematic review of available scientific works, published as early as the 1990s, for the analysis of pollution flashover voltage, is undertaken. The review mainly focuses on factors influencing the efficiency of transmission line insulators under polluted conditions. Specifically, publication databases utilizing various synonyms and keywords associated with the terms "contaminated insulators" and "flashover voltage test" have been scrutinized. The search has resulted in 1364 articles, from which 97 articles have satisfied the review requirements and have been subsequently analyzed to determine the parameters associated with polluted insulators. Major factors that affect the performance of insulators, including electrical and environmental impacts, are discussed. Variations in factors affecting flashover test development and insulator efficiency are also considered. Overall, the current analysis provides an important insight toward successful evaluations of the health of transmission line insulators and research advancements of electric power transmission line insulators.INDEX TERMS Flashover voltage test, polluted insulators, high voltage insulators, transmission line.

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“…Based on the field observations on insulator icing, most insulators are icing on the windward side [11][12][13]. The formation of ice layer and icicle will inevitably affect the overall distribution of the electric field around the insulator string.…”

Section: Overall Electric Field Distribution Of Ice-covered Suspensiomentioning

confidence: 99%

Three‐dimensional electric field simulation and flashover path analysis of ice‐covered suspension insulators

et al. 2020

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Flashover of ice-covered insulators seriously affects the safe operation of transmission lines. It is necessary to study the electric field distribution for flashover analysis of ice-covered insulators. The electric field of ice-covered insulators was mostly calculated by a two-dimensional (2D) axisymmetric model that cannot be well corresponded to actual icing situations. In this study, a 3D electric field simulation model of ice-covered suspension insulators under moderate icing condition with applied DC voltage was established. Two characteristic parameters, E av and E max were proposed to measure electric field distortion degree. Based on the simulation results, the effects of water film conductivity, icicle length, icicle deviation angle, and icicle distribution on E av and E max were studied. The results showed that icicles have a significant influence on the electric field distribution of insulators. E av increases with the increase of icicle length and decreases with the increase of icicle deviation angle. E max increases with the increase of the icicle length, icicle spacing and adjacent icicle length difference. When the icicle deviation angle is 45°, E max is the largest. Lastly, the possible flashover paths were analysed based on the simulation results, which would provide a theoretical basis for building a flashover model of ice-covered insulators.

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AC pollution flashover performance and flashover process of glass insulators at high altitude site

Cited by 18 publications

References 20 publications

DC flashover performance of ice‐covered insulators under complex ambient conditions

DC flashover performance of ice‐covered insulators under complex ambient conditions

Pollution Flashover Voltage of Transmission Line Insulators: Systematic Review of Experimental Works

Three‐dimensional electric field simulation and flashover path analysis of ice‐covered suspension insulators

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