A DC power transmission system comprising: a DC power transmission path formed by diverging into a plurality of paths or converging a plurality of paths; a switch installed so as to divide the DC power transmission path into individual sections; a detection unit detecting a presence of a fault; and a control unit controlling an opening and a closing of the switch based on a detection result by the detection unit, wherein the control unit is adapted for: causing the switch to perform an opening action so as to disconnect the section where a fault occurs from the DC power transmission path when the detection unit detects an occurrence of the fault; causing one of the opened switches due to the occurrence of the fault to perform a closing action after the opening action; causing the one closed switch to perform a re-opening action when the detection unit detects that the fault is still occurring after the closing action of the one switch; and returning all of the switches opened in order to disconnect the fault section from the DC power transmission path to the closed state when the detection unit does not detect that the fault is still occurring after the closing action of the one switch, thereby performing a recovering action of the fault section. a DC power transmission path formed by diverging into a plurality of paths or converging a plurality of paths; a switch installed so as to divide the DC power transmission path into individual sections; a detection unit detecting a presence of a fault; and a control unit controlling an opening and a closing of the switch based on a detection result by the detection unit, wherein the control unit is adapted for: causing the switch to perform an opening action so as to disconnect the section where a fault occurs from the DC power transmission path when the detection unit detects an occurrence of the fault; causing one of the opened switches due to the occurrence of the fault to perform a closing action after the opening action; causing the one closed switch to perform a re-opening action when the detection unit detects that the fault is still occurring after the closing action of the one switch; and returning all of the switches opened in order to disconnect the fault section from the DC power transmission path to the closed state when the detection unit does not detect that the fault is still occurring after the closing action of the one switch, thereby performing a recovering action of the fault section. causing the switch to perform an opening action so as to disconnect the section where a fault occurs from the DC power transmission path when the detection unit detects an occurrence of the fault; causing one of the opened switches due to the occurrence of the fault to perform a closing action after the opening action; causing the one closed switch to perform a re-opening action when the detection unit detects that the fault is still occurring after the closing action of the one switch; and returning all of the switches opened in order to disconnect the fault section from the DC power transmission path to the closed state when the detection unit does not detect that the fault is still occurring after the closing action of the one switch, thereby performing a recovering action of the fault section.