Power grid risk pre-controlling method based on province power grid topology and city power grid topology and county power grid topology

The invention relates to a power grid risk pre-controlling method based on a province power grid topology and a city power grid topology and a county power grid topology. The power grid risk pre-controlling method based on the province power grid topology and the city power grid topology and the county power grid topology comprises the steps of building a power grid dispatching network model comprising a provincial level power grid dispatching network, a power grid dispatching network model comprising a city level power grid dispatching network and a power grid dispatching network model comprising a county level power grid dispatching network, carrying out fast interconnection and rebuilding of the three power grid dispatching network models, basic dispatching data and historical data are input into a system database through a system server and updating the data in real time, building a province dispatching power grid graph, a city dispatching power grid graph and a county dispatching power grid graph and the