Electro‐thermal dynamic model using the analytical arc parameters for the prediction of the critical flashover condition on the HVDC polluted insulator

Hadjrioua, Farid; Mahi, Djillali; Slama, Mohammed El Amine

doi:10.1049/iet-gtd.2016.0945

Cited by 22 publications

(6 citation statements)

References 21 publications

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“…The conductivity of the pollution layer is σ P = 369.05C + 0.42 10 −6 (4) in which C is the equivalent salt deposit density in mg/cm 2 . We can define easily the critical length of the discharge as follows [20]:…”

Section: Experimental Workmentioning

confidence: 99%

“…This critical length differs from that obtained by Mekhaldi [28] (two-third of the total creepage distance) and that found experimentally by Gopal and Rao [29] (1/3 of the total creepage distance). Ghosh and Chatterjee [26] found an interval ranging from 0.4 to 0.63 L and Gopal an interval from 0.5 to 0.85 L. Other researchers [4,12] have used the value of L in their models. These differences in the evaluation of the critical length of the arc can be justified by the choice of the model, the pollution application mode as well as the pollution nature.…”

Section: Experimental Workmentioning

confidence: 99%

“…The modelling of polluted insulator flashover started from a mathematical model proposed by Obenaus [3]. Hadjrioua et al [4] determined the critical conditions for which the electrical discharge moves towards flashover. Subsequently, other researchers improved and developed the flashover model, and built both static and dynamic AC/DC models [5].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic model to predict the characteristics of the electric arc around a polluted insulator

Ouchen¹,

Bayadi²,

Boudissa

2020

IET Science, Measurement & Technology

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Section: Experimental Workmentioning

confidence: 99%

Section: Experimental Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic model to predict the characteristics of the electric arc around a polluted insulator

Ouchen¹,

Bayadi²,

Boudissa

2020

IET Science, Measurement & Technology

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“…To upgrade the models, time was also considered in DC dynamic models of polluted insulators [30,31]. By including thermal properties in the electrical equivalent circuit, models that comprise physical characteristics, discharge current, voltage, resistivity and temperature, and analytical parameters, arc constants, have been proposed [32][33][34][35]. In [36], the theoretical model suggested that it could predict the flashover voltage under hydrophobic natural conditions.…”

Section: Introductionmentioning

confidence: 99%

AC flashover dynamic theoretical and experimental model under fan‐shaped and longitudinal pollution on silicone rubber insulator

Ghayedi

Shariatinasab

Mirzaie

2021

IET Science Measure & Tech

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Due to wind and uneven distribution of the field along the insulator, a kind of non-uniform contamination is deposited on the insulator surface as fan-shaped and longitudinal pollution. This paper investigates such non-uniform pollution from theoretical and experimental points of view. For this aim, the residual resistance of the pollution layer is formulated based on the geometry of fan-shaped and longitudinal non-uniform pollution. Also, the arc current is formulated using the arc Obenaus's equivalent circuit for a constant arc voltage in terms of arc length propagation. Finally, the AC dynamic theoretical model of pollution flashover is proposed that can estimate flashover parameters for different values of the fan-shaped density degree (J), extension degree (K) and longitudinal non-uniform pollution density degree (Z) considering instantaneous variables in arc progression. It results that with increasing Z, the flashover voltage increases, while by increasing the J and K, the flashover voltage decreases. To validate this model, the experimental tests are performed on the sample silicone rubber (SiR) insulator that show acceptable accuracy of theoretical model. Furthermore, based on experimental results, a new correction coefficient is proposed under fan-shaped and longitudinal pollution that varies in the range of 0.85-1.62. 1This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…With the continuous construction of ultra-high-voltage (UHV) transmission lines, they have to pass through various complex contaminated areas such as villages and suburbs, which will be prone to be polluted [1][2][3][4]. The harsh environments will lead to the electrical performance degradation of insulators and the probability raise of pollution flashover, which seriously threaten the safe and reliable operation of the power grid [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Flow field distribution around insulator and contamination uneven characteristic of insulator

Huang

2020

IET Science, Measurement &Amp; Technology

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The accumulation of insulator surface contamination is closely related to the distribution of flow field around the insulator. In order to study the unevenness of the insulator surface contamination, a three-unit lxy-160 insulator is selected. Based on the principle of fluid mechanics, the fluid movement state on the insulator surface is determined by the calculation of Reynolds number and boundary layer, then the flow field distribution around the insulator is obtained. On this basis, the artificial contamination test and numerical simulation are carried out to study the characteristics of contamination uneven distribution on the insulator surface. The results show that when the wind speed is 3-7 m/s and the particle diameter is 1-60 µm, there is obvious boundary layer separation phenomenon, and the flow state before the separation point is laminar, while the flow state behind the separation point is turbulent. From top to bottom, the degree of accumulation on each insulator is different, and the contamination on the windward and leeward sides are unevenly distributed in a fan shape. The increment of wind speed as well as particle diameter will aggravate the unevenness of the contamination.

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Electro‐thermal dynamic model using the analytical arc parameters for the prediction of the critical flashover condition on the HVDC polluted insulator

Cited by 22 publications

References 21 publications

Dynamic model to predict the characteristics of the electric arc around a polluted insulator

Dynamic model to predict the characteristics of the electric arc around a polluted insulator

AC flashover dynamic theoretical and experimental model under fan‐shaped and longitudinal pollution on silicone rubber insulator

Flow field distribution around insulator and contamination uneven characteristic of insulator

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