A power system has an ability to act as a capacitor, magnetic, flywheel or thermal energy storage device without additional investment; generators play the role of power transformation systems, while thermal equipment, rotating machinery and transmission lines play the role of a central store. The capacities of these stores are limited, however, and therefore the power system's built-in storage can only accommodate short time fluctuations in load demand. However, this fundamental power system property allows small quantities of intermittent renewable sources to be accommodated on an interconnected grid without any technical problems.

Inspec keywords: capacitor storage; power system interconnection; power transmission lines; magnetic storage; flywheels; renewable energy sources

Other keywords: load demand; thermal energy storage device; rotating machinery; transmission lines; flywheel storage device; capacitor storage device; intermittent renewable sources; magnetic storage device; interconnected grid; power system; power transformation systems; thermal equipment

Subjects: Other energy storage