Energy storage systems

Abstract

There is no doubt the near future will drive power generation towards DG and RES. Distributed generation units are not controlled and regulated by the power system operators. The power produced in DG units is optimized by the owner in order to maximize the profit, heat production or renewable sources utilization. This is done regardless of the power demand in the networks to which the sources are connected. If the DG utilization reaches more then dozen or so percent of the power production, the problem of power balancing will occur either in the local grid or in the whole system. The problem will become even bigger, if, as EU officially recommends, the power generation is based mainly on renewable sources, such as wind turbines or solar energy. Employment of renewable sources will cause not only decrease in the power quality, but also complications in balancing the power system.