Title :
Power frequency dependence of space charge behavior and partial discharge characteristics in SF6 gas
Author :
Takahashi, T. ; Yamada, T. ; Hayakawa, N. ; Okubo, H.
Author_Institution :
Dept. of Electr. Eng., Nagoya Univ., Japan
fDate :
2/1/2000 12:00:00 AM
Abstract :
The partial discharge (PD) and breakdown (BD) characteristics in SF6 gas under commercial and higher frequency (∼600 Hz) ac voltage applications were investigated using high-speed electrical and optical measuring techniques with phase gate control method. Experimental results revealed that 400 Hz BD voltage at a certain gas pressure range was higher than that for 60 Hz and PD characteristics especially at the positive PD inception phase were much influenced by the applied power frequency. From these results, we clarified the dependence of space charge behavior on the applied power frequency and discussed the physical mechanism of PD and BD in SF6 gas with consideration of the space charge behavior generated by PD in the previous half cycle of ac voltage.
Keywords :
SF6 insulation; high-speed optical techniques; high-speed techniques; partial discharge measurement; space charge; 400 Hz; 600 Hz; SF6; ac voltage applications; breakdown characteristics; gas pressure range; high-speed electrical measuring techniques; high-speed optical measuring techniques; partial discharge characteristics; phase gate control method; physical mechanism; positive PD inception phase; power frequency dependence; space charge behavior; Breakdown voltage; Electric variables measurement; Frequency dependence; Frequency measurement; High speed optical techniques; Optical control; Partial discharge measurement; Partial discharges; Phase measurement; Space charge;
Journal_Title :
Dielectrics and Electrical Insulation, IEEE Transactions on
