Short-Term Hydropower Optimal Scheduling of Multireservoir System Using a Decomposition Approach

A decomposition approach combined with linear approximation method is applied to the short-term hydropower optimal scheduling (STHOS) problem of multireservoir system. The STHOS problem, which is a mixed, nonlinear and nonconvex optimization problem with discrete variables, is decomposed into a master programming problem and some sub programming problems in small scale, and the subproblems coordinate with each other through the master one. Then the STHOS problem is solved in a two-level optimization structure. The model developed in this study is capable of handling the complex objectives and constraints of STHOS, and also takes pump-storage plant into account. Simulation result demonstrates that the proposed approach is efficient.