Abstract
This paper presents an optimal weekly scheduling method for the complicated hydrothermal systems which involve not only hydraulically coupled multi-chain, multi-reservoir hydro systems, but also pumped-storage plants together with thermal units.
The basic approach of the proposed method adopts an iterative optimization algorithm of scheduling each operation of hydro, thermal and pumped-storage systems sequentially. An efficient aggregation-decomposition algorithm for the multi-reservoir hydro scheduling is developed. That is, to get an efficient scheduling method, hydroelectric plants along a river are aggregated into one equivalent hydro plant and then, this plant is decomposed again to each original plant through a matrix screening method so that constraints satisfied optimal solution is realized. Simulation results show that the proposed method has enough efficiency for practical use in terms of convergence characteristic and computing time.
