Hybrid energy storage systems for stand-alone electric power systems: optimization of system perofrmance and cost through control strategies

摘要

The development of remote, renewable-based energy is ihindered in part by teh lack of affordable energy storage. Requiring power-on-demand from an energy system powered by intermittent or seasonal sources may necessitate one-month's energy storage--an expensive proposition using conventional storage technologies. If multiple energy storage devices with complementary performance characteristics are used together, the resulting `hybrid energy-storage system' can dramatically reduce the cost of energy storage over single storage systems. The coupling of conventioanl storage batteries with emerging hydrogen tchnologies provides one such hybrid system. Hydrogen energy storage in this context includes an electrolyzer, hydrogen storage tnak, and a fuel cell. An additional component that must be considered is the control system that determines when the various components are used.