Direct-current remote power supply system

A direct-current remote power supply system comprises a plurality of power transformation and distribution substations. Each power transformation and distribution substation is provided with an AC/DC converter, a busbar, a left power supply arm, a right power supply arm, a contactor, a wind and light power supply storage device and a measurement and control and management device. The AC/DC converter, the busbar, the left power supply arm, the right power supply arm, the contactor, the wind and light power supply storage device and the measurement and control and management device are mounted together and electrically connected; between every two adjacent power transformation and distribution substations, the power output end of the fourth set of contactor of the front-end power transformation and distribution substation and the power output end of the third contactor of the rear-end power transformation and distribution substation are electrically connected in series with an insulating joint. Wind power and p