Coordinated design of a PSS and an SVC-based controller to enhance power system stability

Power system stability enhancement via robust coordinated design of a power system stabilizer and a static VAR compensator-based stabilizer is thoroughly investigated in this paper. The coordinated design problem of robust excitation and SVC-based controllers over a wide range of loading conditions and system configurations are formulated as an optimization problem with an eigenvalue-based objective function. The real-coded genetic algorithm is employed to search for optimal controller parameters. This study also presents a singular value decomposition-based approach to assess and measure the controllability of the poorly damped electromechanical modes by different control inputs. The damping characteristics of the proposed schemes are also evaluated in terms of the damping torque coefficient over a wide range of loading conditions. The proposed stabilizers are tested on a weakly connected power system. The non-linear simulation results and eigenvalue analysis show the effectiveness and robustness of the proposed approach over a wide range of loading conditions.

[1]  Francisco Herrera,et al.  Tackling Real-Coded Genetic Algorithms: Operators and Tools for Behavioural Analysis , 1998, Artificial Intelligence Review.

[2]  Huibert Kwakernaak,et al.  Robust control and H∞-optimization - Tutorial paper , 1993, Autom..

[3]  A.H.M.A. Rahim,et al.  Synchronous generator damping enhancement through coordinated control of exciter and SVC , 1996 .

[4]  A. Hamdan,et al.  An investigation of the significance of singular value decomposition in power system dynamics , 1999 .

[5]  Rajiv K. Varma,et al.  Damping torque analysis of static VAR system controllers , 1991 .

[6]  Mohammad Ali Abido,et al.  A neural network-based approach for on-line dynamic stability assessment using synchronizing and damping torque coefficients , 1996 .

[7]  M. Noroozian,et al.  Damping of power system oscillations by use of controllable components , 1994 .

[8]  M. J. Gibbard,et al.  Robust design of fixed-parameter power system stabilisers over a wide range of operating conditions , 1991 .

[9]  P. Kundur,et al.  Application of Power System Stabilizers for Enhancement of Overall System Stability , 1989, IEEE Power Engineering Review.

[10]  Peter W. Sauer,et al.  Power System Dynamics and Stability , 1997 .

[11]  James A. Momoh,et al.  Electric Power System Dynamics and Stability , 1999 .

[12]  B. W. Hogg,et al.  Co-ordinated control of synchronous generator excitation and static VAR compensator , 1992 .

[13]  Mohammad Ali Abido,et al.  ANALYSIS AND DESIGN OF POWER SYSTEM STABILIZERS AND FACTS BASED STABILIZERS USING GENETIC ALGORITHMS , 2002 .

[14]  Chern-Lin Chen,et al.  Identification of optimum location for stabiliser applications using participation factors , 1987 .

[15]  R. Asgharian.  A robust H/sup /spl infin// power system stabilizer with no adverse effect on shaft torsional modes , 1994 .

[16]  M. Vidyasagar,et al.  Robust Controllers for Uncertain Linear Multivariable Systems , 1984 .

[17]  M. A. Abido,et al.  Simultaneous stabilization of multimachine power systems via genetic algorithms , 1999, IEEE Transactions on Power Systems.

[18]  T. C. Yang,et al.  Applying H∞ optimisation method to power system stabiliser design part 1: single-machine infinite-bus systems , 1997 .

[19]  H. F. Wang,et al.  A unified model for the analysis of FACTS devices in damping power system oscillations. I. Single-machine infinite-bus power systems , 1997 .