Title :
Design of a nonlinear power system stabilizer
Author :
Yasaei, Yasser ; Karimi-Ghartemani, Masoud ; Bakhshai, Alireza ; Parniani, Mostafa
Author_Institution :
Dept. of Electr. Eng., Sharif Univ. of Technol., Tehran, Iran
Abstract :
This paper presents a new controller for power system stabilizer (PSS) that, unlike the conventional linear controllers, consists of both a linear and a nonlinear part. The linear part is properly designed to improve the small-signal stability margin and the damping of the local electromechanical modes. The nonlinear part is then designed to improve transient stability margin of the system without violating the features offered by the linear controller. Both parts are designed based on a perspective which attributes the system oscillations to a Hopf bifurcation (HB) phenomenon. More specifically, the design of the nonlinear part is done through the definition of a nonlinear index that corresponds to the transient stability margin of the system. Simulation results on a simplified model are presented to confirm the analytical derivations.
Keywords :
bifurcation; control system synthesis; linear systems; nonlinear control systems; power system stability; Hopf bifurcation phenomenon; linear controllers; local electromechanical modes; nonlinear index; nonlinear power system stabilizer design; small-signal stability margin; system oscillations; transient stability margin; Power system dynamics; Power system stability; Stability criteria; Transient analysis; Hopf bifurcation; PSS; power system stability; power system stabilizer; small-signal stability; transient stability;
Conference_Titel :
Industrial Electronics (ISIE), 2010 IEEE International Symposium on
Conference_Location :
Bari
Print_ISBN :
978-1-4244-6390-9
DOI :
10.1109/ISIE.2010.5637607