Power system stabilizer tuning study of east-central power system in Saudi Arabia

This paper presents a study of tuning the existing power system stabilizers (PSSs) of the Saudi Electricity Company (SEC) power system and its effect on increasing the power transfer limit of the interconnection between Eastern Operating Area (SECE-OA) and Central Operating Area (SEC-COA). This work is also investigating the optimal location of installing additional power system stabilizers (PSSs) in SEC-EOA / SEC-COA system in order to enhance the damping characteristics of low frequency oscillations. The severely disturbed machines for a major fault disturbance have been identified. The parameters of the existing PSSs in addition to the candidate stabilizers have been tuned and optimized. The effectiveness of the suggested technique in enhancing the power system dynamic stability and extending the power transfer capability limit of the SEC-EOA and the SEC-COA power system was verified through a comprehensive linear analysis and time-domain nonlinear simulation.