The　structure　and　operation　conditions　of　VSC　transformer　are　different　from　those　of　power　transformer　and　converter　transformer.　The　core　grounding　current　of　VSC　transformer　is　affected　by　many　factors.　A　method　for　computing　the　grounding　current　of　a　transformer　is　proposed.　Firstly,　a　geometric　model　is　established　to　characterize　each　metal　structure　in　the　transformer.　Secondly,　a　finite　element　model　of　electrostatic　field　is　established　and　the　partial　capacitance　matrix　is　calculated.　Lastly,　the　circuit　simulation　model　of　the　transformer　can　be　obtained　from　the　partial　capacitance　matrix,　by　which　the　grounding　current　can　be　computed.　©　2022　IEEE.