Numerical study on overpressure caused by arcing faults inside a converter transformer
The arcing fault inside a converter transformer will result in a sudden rise of oil pressure inside the tank,which may lead to tank rupture or even serious explosion and fire,seriously threatening the safe and stable opera-tion of the power system.This paper takes the actual 500 kV UHV converter transformer as the research object,and carries out numerical simulations on the ANSYS platform to obtain the spatial and temporal distribution characteris-tics of the oil pressure inside the converter transformer during the arcing fault.The simulation results show that the gas bubble grows dynamically during the arcing fault inside the equipment,the oil pressure rises abruptly with the pulsation of the gas bubbles and shows obvious fluctuation characteristics,and the spatial distribution of oil pressure inside the converter transformer is uneven.This study has certain reference significance for the converter transform-er pressure reduction and explosion-proof and structure optimization.
NETL
NSTL
万方数据
维普
