Abstract
A real-time model is a quasi-static computer-based mathematical representation of the current conditions in a power network. This model is extracted at intervals from “snapshots” of real-time measurements (analog measurements and the status of switching devices) as well as from static network data (basic configuration and parameters). State estimation is the key function for obtaining such a real-time network model. A more complete understanding of state estimation is becoming more important than in the past due both to new modeling needs and to changes induced by deregulation. This chapter reviews the main concepts involved in state estimation and economy-security functions carried out by the Energy Management System (EMS).
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