Building method of multistage multi-region interconnected network data model

The invention relates to a building method of a multistage multi-region interconnected network data model. Data of a whole power network system is divided according to the range of dispatching of power networks, all stages of all dispatching centers of the network system respectively build data models, if correlation exists between the two dispatching centers, the upper-stage dispatching center defines an equivalent port model of the relating dot between the two dispatching centers, the equivalent port model corresponds to an external power network system related with each local sub-network system; the operating mode of the power network system adopts a cooperative mode of reporting the plan by the lower-stage dispatching center, adjusting by the upper-stage dispatching center, amending by the lower-stage dispatching center, and finally confirming by the upper-stage dispatching center; after the operating mode of the network system is determined, the multistage multi-region data model combination is performed; when certain equipment has a change event in the data model, the change processes the event in the whole power network system by adopting a model change coping mechanism.