Study on slection of optimal objective function for opereting cascade hydropower working on national grid system

Abstract

    There were various studies on optimal operation of cascade hydropower. In these studies, the maximum energy product is a commonly used when developing the optimal model. However, benefits for electric power system is not only total electricity output of hydropower plants but also their ability to participate in load balancing of system. In this study, the author developed a model to calculate the optimal operation of cascade hydropower base on dynamic programming method. Two objective functions were used in this model. The first objective function is maximum energy product and the seconds objective functions is maximum revenue of energy including revenue of availabe capacity. The Son La and Hoa Binh reservoirs were slected as case study. The results show that optimal operation of cascade hydropower with objective function of maximum revenue of energy including revenue of availabe capacity is much better for national gird system.