Recommendations of Optimal Sampling Rates for Periodic Output Feedback Based Discrete Mode PSS

Abstract

In this paper, an attempt is made to recommend the optimal sampling time period for Periodic Output Feedback (POF) based discrete mode power system stabilizer (DPSS). Various collection of input and output sampling time interval has been used in the designing of POF based DPSS. The Particle Swarm Optimization (PSO) technique is used to obtain the optimal gain matrix of the POF controller as well as the optimal sampling time intervals. The effectiveness of POF based DPSS over continuous mode lead-lag PSS is certified using small-signal stability studies. The parameters of lead-lag type continuous mode PSS is also tuned using the PSO technique. The PSS is designed using POF technique for single machine infinite bus (SMIB) system, considering a variety of sampling time intervals at input-output port. Finally, a trial is made to propose an optimum input and output sampling time period for SMIB test power system, through simulation studies.

The Discrete Load Frequency Control System Using a Robust Periodic Output Feedback Controller

“…Te controller is designed to account for the fact that a data reporting rate can only change in a set range [30]. (ii) An improved squirrel search algorithm driven cascaded 2DOF-PID-FOI controller for load frequency control of the renewable energy-based hybrid power system is presented in [31][32][33]. Hybrid gravitational-frefy algorithm-based load frequency control for the hydrothermal two-area system is presented in [34].…”