Hydro power plants play a key role in electric power systems, due to their low operating costs and their flexibility in real time operation. In addition, sustainability and environmental concerns support their use in current power systems, jointly with other renewable sources of energy, like wind and solar energy. The ecological impact of reservoirs can be overcome by the benefits of a good hydro production scheduling. Simulation allows considering complex behavior in hydro plant operation at low computational costs compared with other approaches. For instance, mathematical modeling of the hydro plants in full detail may involve integer or nonlinear programming that requires increased solution times over the simpler linear programming models. In our simulation model, nearly optimal results are obtained by following the guide of longer term hydrothermal mathematical programming models to propose initial reservoir management that is later adapted to fit the peculiarities of the river basin. In this paper we describe a simulation model based on discrete time step. This model may have different purposes: a common use is to obtain near-optimal production schedules that are physically feasible, without performing an explicit optimization; another approach is to use simulation to evaluate the costs of performing maintenance duties in different periods; it can be used to carry out reliability analysis; and finally, simulation can also be used to test different design options when considering river basin construction or expansion.
Keywords: Hydroelectric power plants, discrete simulation, hydro reservoirs management, electric power scheduling.
11ª Conferencia Hispano-Lusa de Ingeniería Eléctrica. Zaragoza, España. 1-4 Julio 2009
Publicado: julio 2009.