Optimal sizing of wind-PV-pumped hydro energy storage systems

Storage systems are key components of standalone hybrid renewable energy systems due to intermittent nature of renewable resources. In design of standalone hybrid system, the storage system needs to be optimally sized to guarantee power quality, system reliability and cost effective energy supply. In this paper, the most mature and traditional long term energy storage technology, the pumped hydro energy storage (PHS) is integrated into a standalone wind-PV system. This paper describes the mathematical modelling of a PHS and reports a method for optimal sizing of the wind-PV-PHS systems.