Abstract
As a monitoring, control, and protection system in a smart transmission grid, the wide area measurement and control system (WAMCS), based on a synchronized phasor measurement unit (PMU), is gradually becoming an important guarantee for security and stability of power systems. However, like any other physical system, WAMCS can fail. This chapter addresses the models and methods in the risk evaluation of WAMCS. After a brief introductory section, the hierarchical structure and failure analysis technique of WAMCS are discussed. The risk evaluation methods of PMUs, regional communication networks, and backbone communication networks are then illustrated. Finally, the chapter presents the numerical results for the risk indices of the substructures and WAMCS.
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