A Weekly Power Generation Scheduling Method of Hydrothermal Systems with Pumped-Storage Plant

Abstract

In the previously reported hydrothermal scheduling methods, emphasis is placed on the hydro scheduling and the thermal system is simply represented by a single equivalent unit which generates an economic schedule.
This paper presents a more detailed (thermal unit commitment involved) and efficient weekly power generation scheduling method of hydrothermal systems with pumped-storage plant. As the pumped-storage operation has a great influence on the unit commitment schedule, using power system's incremental fuel cost and unit's average fuel cost per kWh, firstly, the pumped-storage schedule is integrated into the thermal unit commitment schedule and then, optimal multireservoir hydro operation can be scheduled efficiently by the aggregation-decomposition method.
The effectiveness of the proposed method is ascertained through many simulations for a model system using a personal computer and due to its easiness of handling various constraints and an efficient calculation algorithm, it is considered to be a practical method for the large scale hydrothermal systems.