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Important Issues and Results When Considering the Stochastic Representation of Wind Power Plants in a Generation Optimization Model: An Application to the Large Brazilian Interconnected Power System

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Document pages: 13 pages

Abstract: Wind power has an increasing shareof the Brazilian energy market and may represent 11.6 of total capacity by2024. For large hydro-thermal systems having high-storage capacity, a complementaritybetween hydro and wind production could have important effects. The currentoptimization models are applied to dispatch power plants to meet the marketdemand and optimize the generation dispatches considering only hydroelectricand thermal power plants. The remaining sources, including wind power, small-hydroelectric plants and biomass plants, are excluded from theoptimization model and are included deterministically. This work introduces ageneral methodology to represent the stochastic behavior of wind productionaimed at the planning and operation of large interconnected power systems. Infact, considering the generation of the wind power source stochastically couldshow the complementarity between the hydro and wind power production, reducingthe energy price in the spot market with the reduction of thermal powerdispatches. In addition to that, with a reduction in wind power and asimultaneous dry-season occurrence, this model, is able to show the need ofthermal power plants dispatches as well as the reduction of the risk of energyshortages.

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