Method and system for optimizing operation of power distribution network with flexible multi-state switch

The invention belongs to the technical field of power distribution networks, and particularly relates to an operation optimization method and system for a power distribution network with a flexible multi-state switch, and the method comprises the steps: connecting the flexible multi-state switch into the power distribution network; constructing an operation model of the power distribution network containing the flexible multi-state switch by taking the lowest operation cost and the minimum voltage deviation of the power distribution network in multiple periods as targets; and carrying out optimization solution on the constructed operation model of the power distribution network containing the flexible multi-state switch based on an improved particle swarm algorithm to realize optimized operation of the power distribution network. A controllable power electronic device-flexible multi-state switch is adopted to replace a traditional interconnection switch, the flexibility of operation control of the power distr