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Research on Arc Discharge Calculation and Tank Rupture of Converter Transformer Based on Fluid-Solid-electric Coupling Method

Aiming at the major fire problem caused by the rupture of the fuel tank caused by the arc discharge inside the HVDC converter transformer, a multi-physics simulation model for the arc discharge simulation inside the converter transformer was established, and the simulation calculation was carried out under the 230kJ fault energy inside the HVDC converter. The change characteristics of the internal pressure and the strength of the fuel tank were investigated, and the feasibility of flexible materials for improving the strength of the commutator converter tank was explored, and a useful numerical simulation method was provided for reducing the converter converter fault fire.