Operation domain solving method of flexible direct-current power distribution network

The invention discloses an operation domain solving method of a flexible direct-current power distribution network. The method mainly comprises the following steps of establishing an operation domain mathematical model of the flexible direct-current power distribution network, according to a DistFlow branch power flow linearization method of the flexible direct-current power distribution network, acquiring a linearization expression of feeder line segment power about node power and a linearization expression of node voltage about node power, and considering factors including droop nodes and/or factors with switching conditions of converter station operation modes, under each operation mode of the converter station, enabling the feeder line segment power, the converter station power and the node voltage represented by the load power to meet inequality constraints in an operation domain mathematical model of the flexible DC power distribution network, forming and solving a linear inequality group about the load