title: Application of polynomial control to design a robust oscillation-damping controller in a multimachine power system.
abstract: This paper addresses the application of a static Var compensator (SVC) to improve the damping of interarea oscillations. Optimal location and size of SVC are defined using bifurcation and modal analysis to satisfy its primary application. Furthermore, the best-input signal for damping controller is selected using Hankel singular values and right half plane-zeros. The proposed approach is aimed to design a robust PI controller based on interval plants and Kharitonov's theorem. The objective here is to determine the stability region to attain robust stability, the desired phase margin, gain margin, and bandwidth. The intersection of the resulting stability regions yields the set of kp-ki parameters. In addition, optimal multiobjective design of PI controller using particle swarm optimization (PSO) algorithm is presented. The effectiveness of the suggested controllers in damping of local and interarea oscillation modes of a multimachine power system, over a wide range of loading conditions and system configurations, is confirmed through eigenvalue analysis and nonlinear time domain simulation.
authors.affiliation: Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran. Electronic address: hamed_hasanvandb@yahoo.com.
authors.forename: Hamed
authors.initials: H
authors.lastname: Hasanvand
authors.affiliation: Department of Electrical Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran.
authors.forename: Babak
authors.initials: B
authors.lastname: Mozafari
authors.affiliation: Department of Electrical Engineering, Malek-e-Ashtar University of Technology, Tehran, Iran.
authors.forename: Mohammad R
authors.initials: MR
authors.lastname: Arvan
authors.affiliation: Department of Electrical and Computer Engineering, K.N. Toosi University of Technology, Tehran, Iran.
authors.forename: Turaj
authors.initials: T
authors.lastname: Amraee
keywords: Damping controller; Hankel singular values; Interarea oscillations; Polynomial control; RHP-zeros