TY - JOUR
T1 - Experimental Study on Arc Interruption Characteristics of SF6 and Its Mixtures With CF4
AU - Li, Xingwen
AU - Zhu, Kai
AU - Guo, Ze
AU - Zhang, Yu
AU - Jia, Shenli
AU - Jiang, Xu
N1 - Publisher Copyright:
© 2017 Chin. Soc. for Elec. Eng.
PY - 2017/6/5
Y1 - 2017/6/5
N2 - The arc interruption characteristics of SF6-CF4 were investigated based on a detachable gas circuit breaker (GCB) model. The digital delay generator was used to control the operating mechanism of CB and thyristor etc. The shielding net was used to attenuate the electromagnetic interference. Heat isolation, electrical insulation, and suppression of pressure wave in the tube were realized through a pitot tube filled with damping particles. Gas pressure, arc current and voltage around current zero were measured by the silicon piezoresistive pressure transducer and the current-zero measurement system, respectively. The influence of short-circuit current and ratio of mixtures on the pressure variations at nozzle throat and current-zero behaviours were analyzed. Mayr dynamic arc equation was used to predict the post-arc behaviors of SF6-CF4 arcs by varying rising rate of recovery voltage (RRRV) and current steepness at zero-crossing (di/dt). It is found that the gas pressure increment and critical RRRV tends to get weak as CF4 is added to SF6. Critical post-arc current of SF6 and 50%SF6-50%CF4 are 0.74A and 0.96A, respectively. Critical RRRV of 50%SF6-50%CF4 are about 77% of that of SF6, revealing a certain correlation between the critical RRRV and the pressure increment.
AB - The arc interruption characteristics of SF6-CF4 were investigated based on a detachable gas circuit breaker (GCB) model. The digital delay generator was used to control the operating mechanism of CB and thyristor etc. The shielding net was used to attenuate the electromagnetic interference. Heat isolation, electrical insulation, and suppression of pressure wave in the tube were realized through a pitot tube filled with damping particles. Gas pressure, arc current and voltage around current zero were measured by the silicon piezoresistive pressure transducer and the current-zero measurement system, respectively. The influence of short-circuit current and ratio of mixtures on the pressure variations at nozzle throat and current-zero behaviours were analyzed. Mayr dynamic arc equation was used to predict the post-arc behaviors of SF6-CF4 arcs by varying rising rate of recovery voltage (RRRV) and current steepness at zero-crossing (di/dt). It is found that the gas pressure increment and critical RRRV tends to get weak as CF4 is added to SF6. Critical post-arc current of SF6 and 50%SF6-50%CF4 are 0.74A and 0.96A, respectively. Critical RRRV of 50%SF6-50%CF4 are about 77% of that of SF6, revealing a certain correlation between the critical RRRV and the pressure increment.
KW - Current-zero
KW - Gas pressure
KW - High-voltage gas circuit breaker
KW - Thermal interruption
UR - https://www.scopus.com/pages/publications/85026477413
U2 - 10.13334/j.0258-8013.pcsee.162207
DO - 10.13334/j.0258-8013.pcsee.162207
M3 - 文章
AN - SCOPUS:85026477413
SN - 0258-8013
VL - 37
SP - 3315
EP - 3322
JO - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
JF - Zhongguo Dianji Gongcheng Xuebao/Proceedings of the Chinese Society of Electrical Engineering
IS - 11
ER -