Arc Reignition and Its Suppression of DC Air Circuit Breaker in High Altitude Environment
DC air circuit breaker(DC ACB)in high-altitude environments are prone to reignition during arc breaking,leading to an increased probability of failure.To suppress arc reignition during high-altitude breaking of DC ACB,the on-board DC ACB used in rail transit was focused,a two-dimensional magnetohydrodynamics(MHD)simulation model was established.The arc evolution process in DC ACB at different altitudes was analyzed,and their high-altitude breaking performance were optimized by increasing the transverse magnetic field and setting C-shaped splitter plates.The results show that increasing the transverse magnetic field can not cause arc reignition in DC ACB at altitudes of 2 km and 3 km,but arc reignition occurred at altitudes of 4 km and 5 km.An improved arc chamber structure with a C-shaped splitter plates was adopted on the basis of increasing the transverse magnetic field at altitudes of 4 km and 5 km,which can disconnect DC ACB in high altitude environments successfully.
DC air circuit breaker(DC ACB)high altitudemagnetohydrodynamics(MHD)transverse magnetic fieldC-shaped splitter plate
万方数据
维普
