Pumped storage-based standalone hydrokinetic system: Feasibility and techno-economic study

In this study, a pumped hydro storage is proposed to be used in conjunction with a standalone hydrokinetic system in off-grid power supply. The techno-economic feasibility of such combination is analyzed and compared to the option where batteries are considered as storage system. The system working principle is presented; the mathematical model and simulation model are also developed. Simulations are performed using two different types of loads in rural South Africa as case study to demonstrate the technical advantages as well as the cost effectiveness of the proposed supply option. The results reveal that the novel combination is a cost-effective, reliable and environmentally friendly solution to achieve 100% energy autonomy in remote and isolated communities.