Fast and effective assessment of power systems security region can provide decision-making guidance for system operation. In order to identify operational state of power system, a method of static voltage security region (SVSR) considering wind power integrated is presented. Firstly, index of voltage security margin is presented by combining continuous power flow model and condition of limit induced bifurcation, which could quantify the level of voltage security. Then, hyper-planes of SVSR boundary by blending quasi steady state equation and heuristic algorithm are calculated. The hyper-planes assist in online assessment of security state and load margin. Further, the method of wind power forecasting considering correlation is introduced, which establishes foundation for situation prediction. Finally, the correctness and effectiveness of the proposed method are demonstrated by cases studied in the IEEE 118-bus system. The simulation results show that when the permeability of wind power is high, correlation between wind power output and fluctuation range of voltage safety margin are greater.