In　order　to　maintain　the　voltage　balanced　of　the　long　bipolar　low-voltage　dc　supply　and　utilization　system,　multiple　distributed　voltage　balancers　(VBs)　are　demanded.　A　four-port　converter　with　dual　LC　balancing　branches　is　proposed　in　this　article　to　reduce　the　hardware　cost　of　a　distributed　VB.　The　converter　consists　of　two　dual　active　bridges　(DABs)　and　two　LC　balancing　branches.　The　LC　branches　and　DAB　full-bridge　circuits　on　the　grid　side　form　two　interleaved　LC　VBs.　The　proposed　converter　integrates　voltage　balancing　and　device　grid　connection　functions　through　a　switch-sharing　technology,　which　can　effectively　replace　distributed　VB.　Most　importantly,　both　functions　of　the　converter　can　be　operated　simultaneously.　In　addition,　interleaved　LC　VB　can　achieve　smaller　grid-connected　voltage　ripple.　All　the　switches　of　the　converter　turn　on　with　zero-voltage　switching.　The　validity　of　the　proposed　converter　is　verified　through　±　375　V　Simulink　simulation　and　±　24　V　down-scaled　power　experimental　prototype.　　©　1982-2012　IEEE.