  We address the problem of local flux redistribution in networked systems. The
aim is to detect a suitable cluster which is able to locally adsorb a
disturbance by means of an appropriate redistribution of control load among its
nodes, such that no external node is affected. Traditional clustering measures
are not suitable for our purpose, since they do not explicitly take into
account the structural conditions for disturbance containment. We propose a new
measure based on the concept of degree of freedom for a cluster, and we
introduce a heuristic procedure to quickly select a set of nodes according to
this measure. Finally, we show an application of the method in the context of
DC microgrids voltage control.
