Abstract
This paper presents an evaluation of the benefits of streamflows forecasting in long-term hydroelectric scheduling problem. In the approach considered, at each stage of planning a forecast of the future inflows is made and an operational decision for the following stage is obtained by a deterministic optimization model, in a partial open-loop feedback control framework. The influence of the forecasting model in the performance of this control policy is analysed by simulation using historical inflows record. The effectiveness of the approach was measured using the mean and standard deviation values for hydro generation and operational costs during the planning period, taking into account the hydroelectric plants of the Southeast Brazilian System as a case study.
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