EIGEN ANALYSIS OF SERIES COMPENSATION SCHEMES REDUCING THE POTENTIAL OF SUBSYNCHRONOUS RESONANCE

Reference [1] describes a new concept for mitigation of the phenomenon of subsynchronous resonance (SSR) based on asymmetrical series capaci tor compensation at SSR frequencies. The studies reported in [1] are b ased on a digital time-domain simulation technique. This paper provide s a quantitative evaluation of the concept using a novel eigen analysi s approach. The eigen analysis approach represents the mathematical mo dels of power system components in the three-phase basis, and can eval uate the impacts of asymmetry and imbalance on the system dynamics in the subsynchronous frequency range. The study results restate technica l feasibility of the proposed SSR countermeasure. This paper opens the avenue for examination of active power filter topologies to introduce artificial asymmetry at SSR frequencies to counteract torsional oscil lations.