Optimal Power Dispatching in the DC Microgrid with Clear Sky Irradiance Model
Résumé
The optimization of power dispatching has been proved to be useful for reducing the operation energy cost of a microgrid based on photovoltaic source. However, the formulation of the optimization problem needs the weather forecast to predict photovoltaic generation. The current hourly forecast is always available and often lacks accuracy. Thus, this work proposes the optimization based on a clear sky model to predict the solar irradiance. This model has the advantage of simplicity, since it depends only on the geographical coordinates. The analyses have been done to compare the weather data during 5 months, and the validation of the proposed model is carried out by simulation. The results show the optimization results of the proposed model are slightly better than a common hourly forecast weather provided by a meteorological website.