To solve the problems of the current security control policy of lookup table setting method which includes large amount of calculation and the complex setting and maintenance, a new general security control strategy based on formula calculator is presented. According to the stable form of transient stability, dynamic stability and thermal stability under different grid structures, the control strategy and influencing factors on the different stable forms are studied respectively, a linear model which can revise parameters is established to describe the control quantity and the section power flow value, and the tuning method of the typical key parameter is also put forward. By using single machine equal area criterion proves that the relationship between the section flow and the safety control of transient stability is "concave curve", which provides a basis for the range of key parameters and the linear model of transient stability. Practical application case shows that the proposed control strategy model is more convenient and has clearer physical significance compared with the traditional method, which has great application.