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

Abstract

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.

Keywords

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