Since the information layer and the physical layer in the cyber physical power system(CPPS)are closely coupled

the failure of cyber or physical system will seriously affect the normal operation of power system. This paper proposes a correlation characteristic matrix based modeling method for the coupling system to comb and quantify the complex interaction mechanism of information flow and energy flow in the control applications of power system. In this method

the basic analysis unit of CPPS is abstracted from the actual power system applications. Then

the external characteristics of the information nodes

secondary device nodes and communication nodes are described by the expandable multivariate sets. Moreover

the logical association relation and characteristics of physical layer

secondary device layer

communication layer

and information layer are quantitatively described by the correlation characteristic matrix method. Therefore

a complete CPPS model is formed. Finally

an actual power system based on the proposed CPPS model is analyzed

and the usage of the model is illustrated. The results have verified the rationality and effectiveness of the proposed model.