Smart grid realization method of on-line voltage-stability safety estimation system

The invention relates to a smart grid realization method of an on-line voltage-stability safety estimation system, which comprises the following steps: 1, calculation grids are constructed in a network environment according to a calculation requirement; 2, a coordinating manager engine acquires real-time state estimation section data from an SCADA/EMS system; 3, a calculation manager engine performs power flow convergence check on the real-time state estimation section data to form a calculation task pool; 4, calculation node engines apply for calculation; 5, the calculation manager engine generates mixed voltage stability index information with the influences of active load and reactive load taken into consideration comprehensively according to calculation results sent by each calculation node and identifies weak nodes of a power grid by sorting; and 6, the information of the identified weak nodes of the power grid are written into a database and are refreshed periodically to display a voltage-stability safety estimation result in graph. The method can exert the calculation capability of each calculation node to the maximum, can effectively implement the dynamic load balance, and has high dynamic scalability and fault tolerance.