Topology analysis-based regional power grid fault loss consequence calculation method

The invention discloses a topology analysis-based regional power grid fault loss consequence calculation method. A "load" of a regional power grid intelligent dispatching main station system is subjected to model expansion, and attributes including "a power failure affected user number", "a power failure affected important user number", "important users" and "important user levels" are added; the regional power grid intelligent dispatching main station system stores data sections and divides power grid fault devices into loads and other devices, and the system can accurately calculate fault loss loads based on topology analysis and load models regardless of faults, judge power failure devices, analyze a power failure range and perform statistics on the power failure affected users; and by adopting the method, a fault loss load calculation result is more accurate, and relatively rich power failure affected user information and a power failure range analysis function are provided, so that the technical requirem