Web Services-Based Wide-Area Protection System Design and Simulation

Wide-area protection system (WPS) that monitors the contingency of a a power system from the system-wide view and takes an instant action to restore the power system to its stable point is a trend for the future power system control. Because WPS scheme is strongly dependent on network topology, equipment parameters, and system configuration of the protected system, it is difficult to be simulated and tested under a conventional development environment. This paper proposes a Web services-based architecture for WPS design and simulation. This novel architecture wraps the legacy energy management system (EMS) functions into standard Web service interfaces, and provides standard remote computing and security evaluation services from EMS to WPS. Under this architecture, WPS scheme can be simulated and tested efficiently and the gap between the simulation environment and the running environment will be filled.