Coordinated Design of TCSC and PSS for Mitigating Inter-Area Oscillation

Authors:

Shirali Singh (Manav Rachna International University, Faridabad)

Dr. M.K. Soni (Manav Rachna International University, Faridabad)

Keywords: Power system,interarea oscillations,PSS,FACTs devices,TCSC.

Abstract:

Interconnection of electric power systems is becoming increasingly widespread as part of the power exchange between countries as well as regions within countries in many parts of the world. These long distance power transfers cause, however, the system low-frequency oscillations to become more lightly damped. As a result, many power network operators are taking steps to add supplementary damping devices in their systems to improve the system security by damping these undesirable oscillations.

The objective of this paper is to study the power system stability enhancement via power system stabilizers (PSSs) and Flexible AC Transmission System (FACTS) based controller namely thyristor controlled series capacitor (TCSC).This study includes possible coordination between PSSs and TCSC. This paper utilizes a control scheme to mitigate inter-area oscillations in power systems using FACTS controller. The nonlinear time[1]domain simulation is carried out to validate the effectiveness of the proposed coordination controllers to damp system oscillations. The performance of control strategy of stabilizing controller using PSS and TCSC has been tested by simulation study. Simulation results on two area multi-machines test system show that the power system critical mode of oscillations are damped out effectively after disappearing the disturbance in the system and the controller’s performance is robust to changes in operating condition of the system.

References:

(1) P. Kundur, Power System Stability and Control, New York, McGraw-Hill, 1994.

(2) R.M. Mathur and R.K. Varma, Thyristor-Based FACTS Controllers for Electrical Transmission Systems, Piscataway, NJ, IEEE, 2002.

(3) H.A. Othman and L. Angquist, “Analytical Modeling of Thyristor-Controlled Series Capacitors for SSR Studies,” IEEE Transactions on Power Systems, Vol. 11, No. 1, February 1996, pp. 119-127.

(4) E.V.Larsen and D.A.Swann, “Applying Power System Stabilizer”,IEEE Transaction on Power Apparatus and System, Vol. PAS- 100, No.6. June 1981, PP.3017-3045.

(5) R.J. Fleming, MA. Mohan and K. Parvatisam, “Selection of Parameters of stabilizers in Multimachine systems”, IEEE Transactions on Power Apparatus and Systems, vol-100, 1981, pp.2329-2333.

(6) W.A. Mittelstadt, PE. Krause, P.N. Overholt, J.F. Hauer, R.E. Wilson, D.T. Rizy, “The DOE Wide-area Measurement System (WAMS) Project - Demonstration of Dynamic Information Technology for Future Power System,” Fault and Disturbance Analysis & Precise Measurements in Power Systems, Arlington, VA, Nov, 1995.

(7) Michael J.Basler and Richard C.Schaefer,Basler Electric Company, “Understanding Power System Stability”IEEE Pulp and Paper Conference,June 2005

(8) P.Kundur, M Klein, G.J. Rogers and MS. Zywno, “Application of Power System Stabilizer for Enhancement of Overall System Stability”, IEEE Transaction on Power System, Vol 4, 1989, pp. 614-629.

(9) N.G. Hingorani and L. Gyugyi, “Understanding FACTS: Concepts and Technology of Flexible AC Transmission Systems”, New York, IEEE Press, 2000.

(10) Rodrigo A. Ramos, Luis F. C. Alberto, Newton G.Bretas,”A New Methodology for the Coordinated design of Robust Decentralized power system damping controllers” IEEE Transactions on power system, vol.19, no.1, Feb.2004.