Abstract
SF<inf>6</inf> gas has excellent insulation performance and stability, so it is widely used as an insulation material for high-voltage gas insulation systems of power equipment in the transmission and distribution industry. However, the GWP (Global Warming Potential) of SF<inf>6</inf> gas is very high at 23,900, limiting its use in the power industry. Therefore, research has been conducted for a long time to reduce the amount of use or to find an alternative gas. Alternative gas candidates include CO<inf>2</inf>, N<inf>2</inf>, dry air gases and C<inf>5</inf>F<inf>10</inf>O and C<inf>6</inf>F<inf>12</inf>O. Among them, CO<inf>2</inf> has a low GWP of 1 and a low boiling point, so it is easy to handle, and the arc extinguishing performance applied to GIS is relatively superior compared to other gases, and it can be mixed with O<inf>2</inf> to improve insulation performance. Therefore, it is being actively considered as a promising alternative gas.In general, replacement gas has less than half the dielectric strength of SF<inf>6</inf> gas, so the insulation distance between conductor and enclosure should be longer. In other words, the size of the enclosure that stores the gas is inevitably increased. However, due to cost and product size limitations, manufacturers are gaining insulation through activities such as increasing gas pressure or controlling other influencing factors. Since the critical electric field strength of the gas gap is expressed as the product of the gas pressure and the surface roughness, the surface roughness of the conductor under the ultra-high voltage condition is treated as an important factor affecting the insulation performance. Therefore, in order to secure sufficient insulation performance in eco-friendly products, it is necessary to check the insulation performance change according to the surface roughness and reflect this in the insulation design. In this paper, the effect of the surface roughness of the conductor on the breakdown voltage under the conditions of CO<inf>2</inf>, O<inf>2</inf> mixed gas among eco-friendly gases and SF<inf>6</inf> gas was analyzed and tested.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
