A two-loop excitation control system for synchronous generators

Abstract An excitation controller for a single generator based on modern multi-loop design methodology is presented in this paper. The proposed controller consists of two-loops: a stabilizing (damping injection) loop and a voltage regulating loop. The task of the stabilizing loop is to add damping in the face of voltage oscillations. The voltage regulating loop is basically a PI compensator whose objective is to obtain terminal voltage regulation about the prescribed reference. The main contribution of this paper is to give some insights into the systematic derivation of multi-loop controllers of power generators. Certain connections between the two-loop excitation controller and standard PSS–AVR schemes are discussed. In this way, some insight into the stability of the standard PSS scheme is obtained from the analysis of the proposed controller. The proposed controller is evaluated via numerical simulations on a full finite-element model.

[1]  K. T. Law,et al.  Robust co-ordinated AVR-PSS design , 1994 .

[2]  P. Kundur,et al.  Power system stability and control , 1994 .

[3]  Alexander L. Fradkov,et al.  Passivity based damping of power system oscillations , 1996, Proceedings of 35th IEEE Conference on Decision and Control.

[4]  A.S. e Silva,et al.  Lyapunov design of excitation control for synchronous machines , 1997, Proceedings of the 36th IEEE Conference on Decision and Control.

[5]  Janusz Bialek,et al.  Excitation control system for use with synchronous generators , 1998 .

[6]  Evanghelos Zafiriou,et al.  Robust process control , 1987 .

[7]  William L. Luyben,et al.  Parallel Cascade Control , 1973 .

[8]  C. Desoer,et al.  Tracking and Disturbance Rejection of MIMO Nonlinear Systems with PI Controller , 1985, 1985 American Control Conference.

[9]  R. D. Middlebrook,et al.  Topics in Multiple-Loop Regulators and Current-Mode Programming , 1987, IEEE Transactions on Power Electronics.

[10]  E. Campero-Littlewood,et al.  A comprehensive finite-element model of a turbine-generator infinite-busbar system , 2004 .

[11]  J. De Leon-Morales,et al.  Observer-based control of a synchronous generator: a Hamiltonian approach , 2002 .

[12]  M. P. Houry,et al.  Analysis and design of a robust coordinated AVR/PSS , 1998 .

[13]  S. Wiggins.  Introduction to Applied Nonlinear Dynamical Systems and Chaos , 1989 .

[14]  Arthur R. Bergen,et al.  Power Systems Analysis , 1986 .

[15]  J. Machowski.  Power System Dynamics And Stability , 1997 .

[16]  R. Ortega,et al.  Excitation control of synchronous generators via total energy-shaping , 2001, Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148).