Title :
Suitability of N2-SF6 gas mixtures for the application at gas insulated transmission lines GIL
Author :
Schoeffner, G. ; Graf, R.
Author_Institution :
Siemens AG, Erlangen, Germany
Abstract :
In gas insulated transmission lines (GIL) for insulation purposes N2-SF6 gas mixtures are applied because of economical and ecological reasons. With the different mixtures the same intrinsic strength for quasihomogeneous fields like pure SF6 can be achieved by an increase of the gas pressure. However, concerning the sensitivity to defects or the surface roughness the individual mixtures have different properties. In addition the detectability of defects by PD measurements is different Therefore the range of the SF6 content of the mixtures which are suitable for the application in GIL is limited.
Keywords :
SF6 insulation; gas insulated transmission lines; gas mixtures; insulation testing; nitrogen compounds; partial discharge measurement; surface roughness; GIL; N2-SF6; PD measurement; ecological reason; economical reason; gas insulated transmission line; gas mixture; gas pressure; intrinsic strength; quasi homogeneous field; sensitivity; surface roughness; Dielectrics and electrical insulation; Gas insulated transmission lines; Gas insulation; Ionization; Linear approximation; Power generation economics; Rough surfaces; Sulfur hexafluoride; Surface roughness; Transmission line measurements;
Conference_Titel :
Power Tech Conference Proceedings, 2003 IEEE Bologna
Print_ISBN :
0-7803-7967-5
DOI :
10.1109/PTC.2003.1304299
