Energy control and sizing optimization of an off grid hybrid system (wind-hydrokinetic-diesel)

Technological development and the world economy based on hydrocarbons, promote research in the field of electric power generation through non-conventional renewable sources. This article presents a feasibility analysis of a hybrid renewable energy system. Hydrokinetic-Wind-Diesel (HKT-WT-DG) with a storage system (ESS) using lead acid batteries. The load demand is a Public University located to the south of the Ecuador. Two types of energy control are studied: load cycle (LC) and load following (LF). In order to determine the optimal size of the system minimizing the operation of the diesel generator. The main parameters analyzed are: net preset cost (NPC), cost of energy (COE), unmet electric demand and penetration of diesel generator. The results show that, when using the LC control the ESS, NPC and COE increases considerably with respect to LF control. However, the penetration of diesel generator is radically reduced, both systems have the main objective of operate without compromising the reliability and continuity of the electricity supply.