PSS design criteria to mitigate power quality phenomena in distribution systems with distributed generators

This paper proposes an additional criterion to be included in the PSS design stage, when applying these stabilizers to power distribution systems with distributed synchronous generators. Recently, it was shown that such generators can induce voltage fluctuations in the aforementioned systems, ans since these generators are connected very close to the loads, consumers might be affected by these voltage fluctuations. The proposed PSS design criteria considers a set of perturbations that the system might be prone to, and defines an additional criterion that, together with the classical minimum damping criterion for small-signal stability margin, reshapes the region for pole placement related to the PSS design process to deal with the voltage fluctuations and their consequences. The proposed PSS design criteria can be easily handled by any PSS design method that deals with general regional pole placement problems.