virtual power plant
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A virtual power plant (VPP) is a system that integrates several types of power sources, (such as microCHP, wind-turbines, small hydro, photovoltaics, back-up gensets, and batteries) so as to give a reliable overall power supply. The sources are often a cluster of distributed generation systems, and are often orchestrated by a central authority. In the competitive electricity markets, a virtual power plant acts as an arbitrageur by exercising arbitrage between diverse energy trading ﬂoors. An example of a real-world virtual power plant can be found on the Scottish Inner Hebrides island of Eigg.
Source: Wikipedia - Virtual power plant