The invention provides a 
power grid operating risk recognition and prevention method and 
system. According to the method, a 
power grid model is extracted with the CIM as the standard, and operating measurement data of a 
power grid are imported into the model at a fixed period to form a near-real-time 
operating environment; the power grid operating risk grading standard, an electrical topology analysis 
algorithm and an expert rule base are introduced under the 
operating environment to set up a power grid operating risk recognition and prevention 
bank, an auxiliary platform integrating active risk recognition, accident evaluation and restoration control is set up, the data under the power grid real-time operating mode are integrated through the CIM standard, the problem that 
information system data set up by different manufactures can not be shared is solved, and the sound data support is provided for the power grid safety evaluation; on this basis, the evaluation standard for reasonably evaluating and grading operation risks is increased, and the power grid operating risk recognition and prevention 
system is constructed; an operating 
risk prevention and control work mode with the 
system operation as the center and without participation of related departments together is achieved, and the operating 
risk prevention and control work level of the power grid is improved.