Title :
Instability of DC arc in SF6 circuit breaker
Author :
Ito, H. ; Hamano, S. ; Ibuki, K. ; Yoshinaga, K. ; Yamaji, K. ; Hasegawa, T. ; Irokawa, H.
Author_Institution :
Mitsubishi Electr. Corp., Hyogo, Japan
fDate :
10/1/1997 12:00:00 AM
Abstract :
Instability of the arc in an HVDC circuit breaker was investigated both analytically and experimentally. The analytical work showed that the amplification coefficient and the frequency of the oscillation that leads to the current zero can be given as functions of parallel impedance and arc characteristics. The process to estimate the arc characteristics from the amplification coefficient and the frequency experimentally observed was proposed and the result was compared with the estimation of the same characteristics by the analysis of the current zero behavior. It was shown that a description of the DC arc by a simple Mayr type model could reproduce the initiation and the growth of the oscillation and the interruption of the current
Keywords :
HVDC power transmission; SF6 insulation; circuit-breaking arcs; electric impedance; gas blast circuit breakers; oscillations; DC arc instability; HVDC circuit breaker; Mayr type model; SF6; SF6 circuit breaker; amplification coefficient; arc characteristics; current interruption; current zero; metallic return transfer breaker; oscillation frequency; oscillation growth; oscillation initiation; parallel impedance; Capacitors; Circuit breakers; Circuit faults; Circuit testing; Equations; Frequency; HVDC transmission; Impedance; Interrupters; Power system reliability;
Journal_Title :
Power Delivery, IEEE Transactions on
