摘要：An attempt has been made in this paper to investigate the small signal stability problem of a realmultimachine power system with the application of Thyristor Controlled Series Compensator(TCSC). Though Power System Stabilizers (PSS) are mandatory requirements for damping ofoscillations in the power system, its performance gets affected by changes in networkconfigurations, load variations etc. In order to achieve appreciable damping, installation ofTCSC has been suggested here in addition to conventional PSS. However, the performance ofany FACTS device highly depends upon its parameters and its placement at suitable locations inthe power network. In this paper, a soft computing technique, Particle Swarm Optimization(PSO) has been employed for determining the optimal locations and parameters of the TCSCcontroller in order to mitigate small signal oscillations. In addition to this, based on criticaleigenvalue variations a new indicator being termed as Small Signal Stability Rank (SSSR) hasbeen proposed for assessment of effectiveness of the PSO based TCSC controller for three majorcontingencies.
关键词：Particle Swarm Optimization; Small Signal Stability; Small Signal Stability Rank; Thyristor;Controlled Series Compensator.
