Interconnected high-reliability power supply method and system for power distribution areas

The invention relates to the technical field of power distribution and transmission, in particular to a high-reliability power supply method and system for interconnection in a power distribution area, and the system comprises a multi-port flexible interconnection device composed of a plurality of AC/DC bidirectional converters, and each converter has the advantages of small occupied area and high power density; the direct-current circuit breakers can realize fault isolation and automatic reconstruction of an alternating-current and direct-current net rack through the cooperation of opening and closing between the direct-current circuit breakers; a direct current cable, an alternating current and direct current electric quantity detection sensing device and the like. Flexible interconnection devices such as the AC/DC bidirectional converter and the DC circuit breaker are integrated on the basis of an AC switch of a traditional AC power distribution network, power flow between buses during normal operation of