AC/DC power distribution system based on flexible interconnection device and energy flow method

The invention relates to an AC/DC power distribution system based on a flexible interconnection device and an energy flow method. The system comprises a first medium-voltage alternating-current bus, a second medium-voltage alternating-current bus, a first transformer, a second transformer, a first low-voltage alternating-current bus, a second low-voltage alternating-current bus, a direct-current interconnection line, a first circuit breaker, a second circuit breaker, a third circuit breaker, a fourth circuit breaker, a fifth circuit breaker, a sixth circuit breaker, a first flexible interconnection device, a second flexible interconnection device, a third flexible interconnection device, an alternating-current load and a direct-current load. By means of the flexible interconnection device, the working mode of a port can be changed according to the actual situation, locking of a fault feeder line is achieved, it is guaranteed that the feeder line is not affected by a fault area, and stable operation of a power