title: Comparison of adaptive critic-based and classical wide-area controllers for power systems.
abstract: An adaptive critic design (ACD)-based damping controller is developed for a thyristor-controlled series capacitor (TCSC) installed in a power system with multiple poorly damped interarea modes. The performance of this ACD computational intelligence-based method is compared with two classical techniques, which are observer-based state-feedback (SF) control and linear matrix inequality LMI-H(infinity) robust control. Remote measurements are used as feedback signals to the wide-area damping controller for modulating the compensation of the TCSC. The classical methods use a linearized model of the system whereas the ACD method is purely measurement-based, leading to a nonlinear controller with fixed parameters. A comparative analysis of the controllers' performances is carried out under different disturbance scenarios. The ACD-based design has shown promising performance with very little knowledge of the system compared to classical model-based controllers. This paper also discusses the advantages and disadvantages of ACDs, SF, and LMI-H(infinity).
authors.affiliation: Quanta Technology, Raleigh, NC 27607, USA. swakshar@gmail.com
authors.forename: Swakshar
authors.initials: S
authors.lastname: Ray
authors.forename: Ganesh Kumar
authors.initials: GK
authors.lastname: Venayagamoorthy
authors.forename: Balarko
authors.initials: B
authors.lastname: Chaudhuri
authors.forename: Rajat
authors.initials: R
authors.lastname: Majumder
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D011211:Electric Power Supplies; D004560:Electricity; D005246:Feedback; D008962:Models, Theoretical; D011382:Programming, Linear; D013598:Systems Theory