WANG Zhigang, JIN Guangyao, BAI Changyu, et al. Development and Application of SF6/N2Mixed Gas 1100 kV GIL Product[J]. High voltageapparatus, 2019, 55(8): 16-21+29.
WANG Zhigang, JIN Guangyao, BAI Changyu, et al. Development and Application of SF6/N2Mixed Gas 1100 kV GIL Product[J]. High voltageapparatus, 2019, 55(8): 16-21+29. DOI: 10.13296/j.1001-1609.hva.2019.08.003.
Development and Application of SF6/N2Mixed Gas 1100 kV GIL Product
is widely used in 1 100 kV gas-insulated metal-enclosed line(GIL)
because the large greenhouse effect of SF
6
using SF
6
/N
2
as insulation medium to reduce the usage of SF
6
has important social significance.By researching the insulation
temperature rise and other characteristics of SF
6
/N
2
mixed gas
the pressure and mixing ratio of SF
6
/N
2
mixed gas suitable for 1 100 kV GIL is put forward
a prototype of 1 100 kV GIL is developed and produced
and carried out the dielectric and temperature-rise tests.The tested results are same as the simulation:in the premise of mixed gas of constant pressure
the dielectric strength of the gas enhances with the increasing of SF
6
proportion
the temperature rise of GIL conductor and contact fingers decreases with the increasing of SF
6
proportion
the temperature rise of enclosure has little relation with the SF
6
proportion in mixed gas;in the condition of the same dielectric withstand field strength
the SF
6
/N
2
mixed gas pressure is positively correlated with pure SF
6
gas pressure
the lower the proportion of SF
6
in the mixed gas
the greater the increase of the gas pressure.The developed SF6/N
2
mixed gas insulating 1 100 kV GIL prototype has passed through the type test and long-term live operation test
which verified the reliability of the product in long-term live operation.