Techno-economic evaluation of hybrid energy storage technologies for a solar–wind generation system

Huazhong University of Science and Technology is planning to establish a hybrid solar–wind generation dynamic simulation laboratory. Energy storage technologies will be vital to this system for load leveling, power quality control and stable output. In this paper, the technical feasibility of energy storage technologies for renewable intermittent sources like wind and solar generation is analyzed. Furthermore, the different combination modes of energy storage technologies are proposed. The involved energy storage technologies include superconducting magnetic energy storage systems (SMESs), flywheels (FWs), electrochemical super-capacitors (SCs) and redox flow batteries (RFBs). Based on that, the economic analysis of hybrid energy storage technologies is conducted.

► The techno-economic feasibility of four ESSs is studied.
► The hybrid ESS applied on a renewable energy generation system is feasible.
► From the technical and economic viewpoint, case 3 is the optimal hybrid ESS.