PROJECT TITLE :
Two-Stage Load Control for Severe Under-Frequency Conditions
A 2-stage load control theme is presented to deal with severe beneath-frequency conditions. The primary stage is event-based under-frequency load shedding that guarantees quick response to the detected high-consequence disturbances, for initial system protection. The management signals are obtained by solving mixed-integer programming problems. After the primary stage, model predictive management is triggered within the second stage for step-by-step on-line closed-loop control of interruptible masses, the quantity of which is identified via solving linear programming problems. Trajectory sensitivities are used in the optimization problems in each stages to facilitate the analysis. The proposed theme has been tested on a 9-bus system and on the New England 39-bus system.
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