Damping improvement using a multiple input controller in a TCSC device

In this paper, a secondary feedback signal is applied to introduce more flexibility in the controller design with regard to the achievable damping performance. A two-input single-output (TISO) controller for a TCSC device is designed in the IEEE 50-machine test system. The theoretical basis for using an additional feedback signal is presented and the results from the small signal analysis and dynamic simulations show that the TISO controller can achieve significantly better damping at each operating point than a single-input single-output (SISO) controller. Furthermore, the damping improvement from the TISO controller increases with the increase in system stress level. Thus the TISO controller can extend the system operating range with satisfactory damping

[1]  Richard H. Middleton,et al.  A survey of inherent design limitations , 2000, Proceedings of the 2000 American Control Conference. ACC (IEEE Cat. No.00CH36334).

[2]  Bikash C. Pal,et al.  A linear matrix inequality approach to robust damping control design in power systems with superconducting magnetic energy storage device , 2000 .

[3]  Einar Vaughn Larsen,et al.  A thyristor controlled series compensation model for power system stability analysis , 1995 .

[4]  K. L. Lo,et al.  Coordination of TCSC and SVC for stability improvement of power systems , 1997 .

[5]  Y. Chait,et al.  Disturbance attenuation in a SITO feedback control system , 2002, Proceedings of the 2002 American Control Conference (IEEE Cat. No.CH37301).

[6]  Qian Liu,et al.  LPV supplementary damping controller design for a thyristor controlled series capacitor (TCSC) device , 2006, IEEE Transactions on Power Systems.

[7]  Joe H. Chow,et al.  Power swing damping controller design using an iterative linear matrix inequality algorithm , 1999, IEEE Trans. Control. Syst. Technol..

[8]  Varodom Toochinda.  Fundamental limitations of ANC in one -dimensional ducts using 2 sensors and 1 actuator , 2002 .

[9]  Ian Postlethwaite,et al.  Multivariable Feedback Control: Analysis and Design , 1996 .

[10]  J. Freudenberg,et al.  Right half plane poles and zeros and design tradeoffs in feedback systems , 1985 .

[11]  Christopher V. Hollot,et al.  A single-input two-output feedback formulation for ANC problems , 2001, Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148).

[12]  Christopher V. Hollot,et al.  On selecting sensor and actuator locations for ANC in ducts , 2001, Proceedings of the 40th IEEE Conference on Decision and Control (Cat. No.01CH37228).

[13]  Vijay Vittal,et al.  Transient Stability Test Systems for Direct Stability Methods , 1992 .