ANALYSIS AND DESIGN OF POWER SYSTEM STABILIZERS AND FACTS BASED STABILIZERS USING GENETIC ALGORITHMS

Power system stability enhancement via a power system stabilizer (PSS) and FACTS-based stabilizers is thoroughly investigated in this paper. The design problem of PSS and different FACTS controllers is formulated as an optimization problem. An eigenvalue-based objective function to increase the system damping and improve the system re- sponse is proposed. Then, a real-coded genetic algo- rithm (RCGA) is employed to search for optimal controller parameters. In addition, this study pre- sents a singular value decomposition (SVD) based approach to assess and measure the controllability of the poorly damped electromechanical modes by dif- ferent inputs. The damping characteristics of the proposed schemes are also evaluated in terms of the damping torque coefficient with different loading conditions for better understanding of the coordina- tion problem requirements. The proposed stabilizers are tested on a weakly connected power system with different loading conditions. The nonlinear simula- tion results and eigenvalue analysis show the effec- tiveness and robustness of the proposed control schemes over a wide range of loading conditions.

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

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

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

[4]  Jaewon Chang,et al.  Time-optimal series capacitor control for damping interarea modes in interconnected power systems , 1997 .

[5]  A.-A. Edris,et al.  Enhancement of first-swing stability using a high-speed phase shifter , 1991 .

[6]  M. A. Abido,et al.  Hybridizing rule-based power system stabilizers with genetic algorithms , 1999 .

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

[8]  Y. H. Ku,et al.  Electric Power System Dynamics , 1983 .

[9]  F. Jiang,et al.  Power system stability enhancement using static phase shifter , 1997 .

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

[11]  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 .

[12]  Takashi Hiyama,et al.  Coordinated fuzzy logic control for series capacitor modules and PSS to enhance stability of power system , 1995 .

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

[14]  Udaya Annakkage,et al.  Controlled series compensation for improving the stability of multi-machine power systems , 1995 .

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

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

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