OPERATION PLANNING OF LARGE-SCALE HYDROELECTRICAL SYSTEMS

This paper presents the methodology and models developed to solve the operations scheduling problem for the Brazilian system. A chain of four individual programs ranging from hourly transmission-constrained dispatch to multi-year reservoir optimization has been used. The output of the programs at higher levels impose targets or constraints on the lower level programs. In addition, feedback links from lower level to higher level programs help ensure a global optimization of the scheduling process. The techniques employed to solve the scheduling problems at each level include stochastic dynamic programming, Dantzig-Wolfe decomposition, network flows and multistage stochastic Benders decomposition.