Locomotive and direct-current power supply system reconnection redundancy device thereof

The invention relates to a direct-current power supply system reconnection redundancy device of a locomotive. The device comprises a direct-current power source device, a storage battery and a control device TCMS, wherein the control device TCMS is provided with a diode VD2, an anode of the diode VD2 is connected with the direct-current power device and the plus end of the storage battery, and a cathode of the diode VD2 is connected with a load; the control device TCMS is also provided with a diode VD1 connected with a contactor KM1 in parallel, a cathode of the diode VD1 is connected with the cathode of the diode VD2, and an anode of the diode VD1 is connected with a reconnection socket C2; and the opening and closing states of the contactor KM1 are controlled by the control device TCMS. The direct-current power devices of the sections of locomotives are mutually redundant, the normal operation of each section of locomotive is guaranteed, the failure rate of the locomotive is reduced, and the operation reliability of a reconnection locomotive group is greatly improved.