Architecture and Application of Real-time Co-simulation Platform for Cyber-physical Power System

With the development of smart grid technology, the observability and controllability of power system are extremely enhanced, promoting traditional power system transformed into a emerging system: cyber-physical power system (CPPS). The procedures of information collection, transmission and process have more effects on power system business. The real-time co-simulation platform of CPPS can provide technical support for the researches of the related theories and applications. In this paper, the existing co-simulation schemes and corresponding 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 power system simulation tool RT-LAB and communication system simulation tool OPNET, a real-time co-simulation platform for CPPS was proposed with originally developed data transmission interface and conversion module. Furthermore, to extend the functions and accuracy of the platform, dynamic simulated devices are accessed to form a mixed-signal co-simulation platform, which is capable of simulating the dynamic characteristics of system precisely with high speed. Finally, a case study of voltage control in photovoltaic stations demonstrates the reasonability and validity of the platform.