Simulation Study of Internet-Based Inter-Control-Center Data Exchange for Complete Network Modeling

The model used for real-time network security and transmission capability analyses requires the use of a large area network and has to be brought up to real-time conditions. To build a complete network model, SCADA data must be made available to many external bodies. An Internet interface to SCADA systems is proposed for intercontrol-center data exchange. A discrete even technique is utilized to simulate the interarea data exchange. The performance modeling of data exchange on the Internet is established, and a quantitative analysis of the data exchange delay is presented. Simulation and experimental results have indicated that the Intemet provides a convenient way for inter-control-center data exchange, and, by using state estimation (SE), accurate complete network models can be obtained for practical security and made available for transfer capability analyses.