Author/Authors :
Nakao، نويسنده , , H.، نويسنده , , Nakagoshi، نويسنده , , Y.، نويسنده , , Hatano، نويسنده , , M.، نويسنده , , Koshizuka، نويسنده , , T.، نويسنده , , Nishiwaki، نويسنده , , S.، نويسنده , , Kobayashi، نويسنده , , A.، نويسنده , , K. Murao، نويسنده , , T.، نويسنده , , Yanabu، نويسنده , , S.، نويسنده ,
Abstract :
The Kii-Channel HVDC Link under construction in
Japan is equipped with metallic return transfer breakers (MRTBs)
in one converter station. A new MRTB for an interrupting current
of 3500 A d.c. was developed. To interrupt a d.c. current, a method
that produces a current zero point by superimposing a self-excited
oscillatory current on a d.c. arc current was employed. For this
purpose, a circuit was coupled in parallel to a SF6 gas circuit
breaker. Developing a SF6 gas circuit breaker that has a large arc
voltage drop gradient against currents permitted a large oscillatory
current to be generated. A modified Mayr-type dynamic arc
equation was newly presented. The d.c. interruption limits calculated
using this equation agreed with the measured values.
Keywords :
SF6 gas circuit breaker. , Arc voltage , d.c. circuit breaker , HVDC Transmission , Mayr-type dynamic arc equation , MRTB , self-excited oscillation
