Load aggregation effect in power grid

In this paper, the issue of data-driven modeling of a single load in a laboratory set-up is confronted with the same data-driven modeling of the same load, but in a real grid environment. As it is argued here, an aggregation effect of all of the loads in a grid endows a single load with grid-characteristics properties in addition to the usual load-specific properties. Topologically, the hidden feedback structure of a bus model reveals that the resulting digraph is strongly connected, meaning that all loads are intertwined in a single system that cannot be decomposed into islands.