With the development of smart grid technology

the observability and controllability of power cyber-physical system(CPS)are greatly enhanced. The procedures of information collection

transmission and processing have more influences on power system services. The construction of dynamic co-simulation platform for power CPS will provide technical support for the researches of related theories and applications. The existing simulation schemes and their structures are analyzed. The essential difference between mathematical models of power flow and information flow makes it necessary to build a real-time co-simulation platform. Based on the power system simulation tool OPAL-RT and the communication simulation tool OPNET

a real-time simulation platform for power CPS is proposed with the originally developed data transmission interface and conversion module

which can precisely simulate the dynamic characteristics of power system with a high speed. A case study of load control system shows the reasonability and validity of the platform. This work is supported by National Natural Science Foundation of China(No. 51577030)

National High Technology Research and Development Program of China(863 Program)(No. 2015AA050202)and State Grid Corporation of China.