Dissipativity as a unifying control design framework for suppression of low frequency oscillations in power systems

In this paper, the authors present a unifying framework for design of controllers that suppress low-frequency oscillations in power systems. The proposed methodology is based on the physical notion of dissipativity, and on its system-theoretic counterparts. They illustrate the capabilities of this framework in four application areas: power system stabilizers (PSSs); supplementary control for high-voltage DC (HVDC) lines; auxiliary control for static VAr systems (SVCs); and regulation of thyristor-controlled series capacitors (TCSCs). All case studies involve a standard benchmark case of a multi-machine power system, and all controllers use only locally available information.