Method and system for establishing distribution network model

The invention relates to the technical field of distribution network models, and provides a method and a system for establishing a distribution network model. The method comprises the following steps: acquiring preset maintenance authorizations of the distribution network model; establishing a primary equipment model and a secondary equipment model in a range specified by the maintenance authorizations, and drawing a figure, wherein the secondary equipment model and the figure are respectively associated with the primary equipment model; according to the primary equipment model, the secondary equipment model and the figure which are associated, generating a network topology model; and informing other model maintenance modules to update network topology models respectively maintained by themselves according to the generated network topology model by using online modeling information. According to the invention, through acquiring the preset maintenance authorizations of the distribution network model, the correctness of a multi-people maintenance model can be ensured, thereby facilitating maintenance; and other model maintenance modules are informed to update network topology models respectively maintained by themselves according to the generated network topology model by using online modeling information, so that a power grid model is always consistent with an actual power-grid running model.