| Title |
AC Breakdown Voltage Simulation of SF6/N2 Mixture in Non-Uniform Field and Its Comparison with Experimental Values |
| Authors |
이병택(Lee, Byung-Taek) ; 황청호(Hwang, Cheong-Ho) ; 이태호(Lee, Tae-Ho) ; 허창수(Huh, Chang-Su) ; 장용무(Chang, Yong-Moo) ; Lee, Ki-Taek(Lee, Ki-Taek) |
| Keywords |
Breakdown Characteristics ; simulation ; SF_6 ; N_2 |
| Abstract |
SF_6 is the most commonly used insulating gas in electrical systems. But In these days SF_6 mixtures and alternative gas has been studied because of global warming. so although many studies have been carried out about binary gas mixtures with SF_6, few studies were presented about breakdown characteristics of SF_6/N_2 mixtures. At present study the breakdown characteristics of SF_6/N_2 mixtures in Non-uniform field was performed. In this paper, The simulation value are compared with experiment values. Streamer breakdown criterion was used for predicting breakdown voltage. For accurate simulation this simulation apply utilization factor using CST(computer simulation technology) EM studio^{tm} program. AC breakdown experiments in non-uniform field was performed to compare with the breakdown simulation values. The pressure range of gas mixtures was 0.4 MPa to 0.7 MPa. The rod-plane was used and mixture ratio is SF_6 20% : N_2 80%. The gap lengths are 10mm to 70mm. As the pressure increase, this simulation value does not correspond to the experiment value. So this simulation need surface roughness factor. As a result of applying surface roughness factor this simulation decrease a relative error (|experiment value - simulation value| /simulation value). |