Title :
Very fast transients in 1000 kV gas insulated switchgear
Author :
Yamagata, Yoshibumi ; Nakada, Yasuhiko ; Nojima, Kenichi ; Kosakada, Masayuki ; Ozawa, Jun ; Ishigaki, Ichizo
Author_Institution :
Tokyo Electr. Power Co. Inc., Japan
Abstract :
For 1000 kV transmission system, disconnecting switches (DSs) fitted with resistors and high-speed grounding switches (HSGSs) were developed. At the UHV Equipment Test site, DS surge and HSGS closing surge tests were conducted. Then, the very fast transient overvoltage (VFTO) controlling performance of the DS and the surge voltage level due to HSGS closing were confirmed. In the same tests, the surge level transferred into the protecting and controlling components were confirmed to be low enough for them to operate properly. The transferring mechanism was clarified by an electromagnetic wave propagation analysis
Keywords :
electromagnetic wave propagation; gas insulated switchgear; overvoltage; surges; switchgear testing; transient analysis; 1000 kV; UHV Equipment Test site; closing surge tests; controlling components; disconnecting switches; electromagnetic wave propagation analysis; gas insulated switchgear; high-speed grounding switches; performance control; protecting components; resistors; surge voltage level control; transmission system; very fast transient overvoltage; very fast transients; Decision support systems; Electromagnetic propagation; Gas insulation; Grounding; Resistors; Surge protection; Switches; Switchgear; Testing; Voltage control;
Conference_Titel :
Transmission and Distribution Conference, 1999 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-5515-6
DOI :
10.1109/TDC.1999.756104
