Design of HVDC supplementary controller accommodating time delay of the WAMS signal in multi-machine system

In this paper a novel HVDC supplementary controller based on WAMS was proposed which accounts for delayed arrival of the signal. The controller performance deteriorates considerably if the time delay involved in the data transmission is much more than the time period corresponding to some critical inter-area modes. In this paper, causes of transfer delay and their influence on the HVDC supplementary controller were analyzed. A new controller was then designed based on the linear matrix inequality (LMI) theory in order to account for the time delay effect. Performance of the new controller was compared with the controller that doesn't account for time delay effect. The design method was extended to multi-machine system and the simulation results showed that the method is feasible and effective

[1]  Xu Zheng,et al.  A novel unified approach for analysis of small-signal stability of power systems , 2000, 2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077).

[2]  G. T. Heydt,et al.  Design of delayed-input wide area power system stabilizer using the gain scheduling method , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[3]  R. L. Cresap,et al.  Operating Experience with Modulation of the Pacific HVDC Intertie , 1978, IEEE Transactions on Power Apparatus and Systems.

[4]  Yonghong Chen,et al.  Wide-Area Stability and Voltage Control , 2000 .

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

[6]  Yang Jin-bai.  RESEARCH ON IMPROVING TRANSIENT STABILITY OF AC/DC HYBRID SYSTEM BY HVDC MODULATION , 2004 .

[7]  M. Pozzi,et al.  THE ITALY-GREECE HVDC LINK , 2002 .

[8]  T. Margotin,et al.  Delayed-input wide-area stability control with synchronized phasor measurements and linear matrix inequalities , 2000, 2000 Power Engineering Society Summer Meeting (Cat. No.00CH37134).

[9]  Zheng Xu,et al.  HVDC supplementary controller based on synchronized phasor measurement units , 2004, IEEE PES Power Systems Conference and Exposition, 2004..

[10]  Ali Feliachi,et al.  Communication delays in wide area measurement systems , 2002, Proceedings of the Thirty-Fourth Southeastern Symposium on System Theory (Cat. No.02EX540).

[11]  C. Scherer,et al.  Multiobjective output-feedback control via LMI optimization , 1997, IEEE Trans. Autom. Control..

[12]  P. Gahinet,et al.  H∞ design with pole placement constraints: an LMI approach , 1996, IEEE Trans. Autom. Control..

[13]  Pascal Gahinet,et al.  esign with Pole Place Constraints: An L I Approac , 1996 .