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access icon openaccess Motion of metallic particle near the conical insulator of UHVAC gas-insulated transmission line

This is an open access article published by the IET under the Creative Commons Attribution-NonCommercial-NoDerivs License (http://creativecommons.org/licenses/by-nc-nd/3.0/)
Received 28/08/2018, Accepted 19/09/2018, Published 26/10/2018

The UHV gas-insulated transmission line (GIL) has the advantages of large transmission capacity, high operation reliability, and environmental friendliness. It is suitable for the power transmission of hydropower stations and nuclear power stations and the restricted environmental or geographical conditions. China is constructing a single-phase length of 5.8 km from Suzhou to Nantong UHVAC GIL over the Yangtze River project. However, due to the large size of the UHV GIL, the long standard units, and the large capacity, it is of great significance to study the motion of metallic particles near the disc insulator for the safety and stability of UHV GIL. Taking the typical insulation structure of UHVAC GIL as an example, a numerical model of the movement of spherical metal particles near the conical insulator was established. The influence of different initial positions, different loading voltages, and different particle quality on the motion characteristics of the particles was analysed. The conclusions of the study provide theoretical support for the design of insulation structure and engineering application of UHVAC GIL.

Inspec keywords: gas insulated transmission lines; gas insulated switchgear; safety; insulators; power system stability

Other keywords: spherical metal particles; motion characteristics; nuclear power stations; power transmission; transmission capacity; geographical conditions; different particle quality; Nantong UHVAC GIL; Yangtze River project; engineering application; loading voltages; single-phase length; typical insulation structure; UHV gas-insulated transmission line; disc insulator; UHVAC gas-insulated transmission line; hydropower stations; high operation reliability; long standard units; size 5.8 km; environmental friendliness; restricted environmental conditions; UHV GIL; conical insulator

Subjects: Power line supports, insulators and connectors; Switchgear; Power system control; Overhead power lines; Reliability

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