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Effect of Metallic Particles on E-field Enhancement in Extra High Voltage Gas-insulated Transmission Lines
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 Title & Authors
Effect of Metallic Particles on E-field Enhancement in Extra High Voltage Gas-insulated Transmission Lines
Rao, M. Mohana; Satyanarayana, S.; Kumar, S. Vinay; Jain, H.S.;
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 Abstract
Gas-insulated transmission lines (GITL) are valued as technological solutions in hydro-power stations due to their enormous power handling capabilities. The performance of GITL is a function of the size of metallic particles inside the gas-insulated chamber. Electrostatic field (E-field) enhancement is a common phenomenon in gas-insulated lines due to these metallic particles. In this study, the E-field enhancement factor is calculated by considering metallic particles at various locations in the gas-insulated line/bus section, such as high-tension (HT) conductor, high-voltage shields, support insulator, and inner surface of grounded enclosure. For this purpose, a two-dimensional model based on finite element (FE) method is developed. The length of the metallic particle is in the range of 1 to 10 mm while the diameter is between 1 to 3 mm. E-field enhancement is also computed for various particle configurations of the gas-insulated system, with focus on dielectric coating made of epoxy on HT conductor and inner surface of grounded enclosure.
 Keywords
Dielectric coating;Finite element (FE) method;Gas-insulated transmission lines (GITL);Metallic particles;Partial discharge (PD);Support insulator;
 Language
English
 Cited by
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Journal of Electrical Engineering and Technology, 2014. vol.9. 4, pp.1369-1374 crossref(new window)
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Diagnosis of Medium Voltage Cables for Nuclear Power Plant, Journal of Electrical Engineering and Technology, 2014, 9, 4, 1369  crossref(new windwow)
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