The utility model discloses a bipolar flexible direct current transmission system, bipolar flexible direct current transmission system contains two many level of bench formwork massing transverters, and the interchange side of two transverters is parallelly connected, and the direct current side common port of two transverters constitutes bipolar flexible direct current transmission system's neutral bus, still including station earthing reactor and bridge arm reactor, wherein, the earthing reactor that stands arranges between bipolar flexible direct current transmission system ground point andneutral bus that the bridge arm reactor is arranged on 6 bridge arms and is located change of current valve respectively and exchanges between the connection transformer valve side three -phase connection point. Arbitrary transverter constitutes bipolar flexible direct current transmission system's an utmost point in this system, and configuration bridge arm reactor and station earthing reactor in the wiring of transverter owner under the circumstances of guaranteeing the present function of flexible direct current transmission system, through the configuration reactor, can suppress under allkinds of troubles bridge arm fault current and circuit fault current's increasing rate.