Centralized flexible direct-current interconnection system suitable for parallel operation of multiple transformer areas

The invention provides a centralized flexible direct-current interconnection system suitable for parallel operation of multiple transformer areas. The centralized flexible direct-current interconnection system is composed of a plurality of flexible direct-current interconnection cabinets, a plurality of direct-current power distribution cabinets, a coordination control cabinet and a UPS (Uninterrupted Power Supply) cabinet which are connected, corresponding AC/DC bidirectional inverters are configured in the plurality of flexible direct-current interconnection cabinets according to the number of transformer areas, and interconnection is carried out through direct-current buses; dC switches are installed in the plurality of DC power distribution cabinets according to the access condition of DC equipment, and DC access ports are arranged; the transformer area side is connected to the corresponding AC/DC bidirectional inverter in the flexible DC interconnection cabinet by using an AC cable through a low-voltage