OPTIMIZATION OF GENERATING UNITS DISPATCH

System baseado Based on Optimization and Measurement for
the Scheduling of Generating Units of Hydropower Plants

Solution based on a computational system that, with real-time measurements and the coordinated execution of optimization models, performs real-time optimization of a hydroelectric power plant (HPP). It is a type of specialized joint control that considers the specificities of each generating unit and optimizes the generation required for the HPP.

This system focuses on a solution for hydroelectric power plants (HPPs) in the National Interconnected System (SIN), which are classified by the National Electric System Operator (ONS) as Type I plants, meaning their scheduling and generation dispatch are centralized. In this context, an agent owning an HPP faces a series of operational challenges to consider throughout the stages comprising the plant’s generation dispatch, including:

(a) Generation targets provided by ONS to maintain centralized coordination of the SIN;
(b) Forced and scheduled outages of generating units (GUs);
(c) Inflow forecasting;
(d) Presence of several GUs, with some possibly having distinct operating behavior located in powerhouse blocks along the dam;
(e) The groups may have different hill curves due to differing construction characteristics;
(f) As a result, there are different operating characteristics between groups, such as hydraulic efficiency curves and turbine operating ranges;
(g) Some HPPs adopt the concept of generation islands, where different GUs and step-up transformers (STs) are present with specific operational restrictions for connection to the system;
(h) Lastly, and no less importantly, in most cases there is strong hydraulic coupling with upstream and downstream plants.

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