ABSTRACT
The power transfer capability of transmission line is enhanced by the introduction of series compensator. However, the series compensator introduces subsynchronous resonance (SSR) in the network. The introduction of series-associated flexible alternating current transmission system (FACTS) devices along with additional controllers provides not only stable power system in series-compensated lines, but also an effective damping solution related to SSR oscillation. This chapter focuses on achieving SSR oscillation mitigation by series FACTS devices, namely, static synchronous series compensator (SSSC) and thyristor-controlled series capacitor (TCSC) with proportional-integral (PI) controller and fuzzy-based controller, in an IEEE Second Benchmark Model (SBM) system. The effects of TCSC and SSSC with conventional PI and fuzzy controllers in damping SSR-related oscillation and rotor speed deviation in an IEEE SBM system are analyzed under steady state and transient state using MATLAB. The obtained results show the potential and effectiveness of fuzzy logic controllers (FLC)over PI controllers in handling damping of SSR oscillations.
