Author(s): Sheung-Kown Kim; Yongdae Lee; Jaehee Kim; Ick Hwan Ko
Linked Author(s):
Keywords: Daily reservoir operation; Multiple objective; Tchebycheff; Reference point approach; Well-distributed Pareto-optimal solutions
Abstract: The short-term operating model probably should have a useful function in achieving the synergistic gains of a system of reservoir operation, while pursuing the long-term storage targets. In order to secure synergistic gains from joint daily operation in coordination with other dams in the basin in real-time, we developed a multiple objective mixed integer pre- emptive goal-programming (MOMIPGP) model. We assumed that the monthly target storages can be assessed by a stochastic monthly operating model in higher hierarchy of the decision process, and that the daily inflows for the next few days could be predicted in advance, while using the yearly averages thereafter. To account for the effect of daily river-routing, the lagged time water conveyance as a function of the volume of water released is incorporated into the model. And an iterative linear approximation technique associated with the hydro- electric power generation is used to deal with the nonlinear factor in hydro-electric energy maximization. In order to take into account the nature of multiple objectives, we suggested to use the CBITP (Convex hull of individual maxima Based Interactive Tchebycheff Procedure), which would provide the DM (Decision Maker) with a wide range of choices of Pareto- optimal solutions as well as the most preferred daily release decisions in coordination with other dams in the basin.
Year: 2005