Feedback stabilization for AC/DC power system with nonlinear loads

In view of the nonlinearity of loads and HVDC in power systems, the M derivative, M bracket and multi-input multi-output (MIMO) feedback linearization based on nonlinear differential algebraic system (NDAS) are introduced into the design of nonlinear controller for parallel AC/DC power system. Bronovsky normal form for NDAS is derived when the M relative degree of NDAS is less than its dimension and certain designated conditions are satisfied. The control laws of both the excitation system and the rectifier current control for AC/DC system are studied in depth which combine the input-output linearization technique and zero dynamics design theory for NDAS. The simulation for a single-machine infinite bus system (SMIBs) with parallel AC/DC transmission lines shows that the nonlinear control (NLC) strategy is able to improve system dynamic performance for a variety of system operating conditions.

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

[2]  C. W. Taylor,et al.  Load representation for dynamic performance analysis , 1993 .

[3]  W.A. Mittelstadt,et al.  Small-signal modulation of the Pacific HVDC intertie , 1976, IEEE Transactions on Power Apparatus and Systems.

[4]  C. Chen,et al.  Static VAr compensator control for power systems with nonlinear loads , 2004 .

[5]  Jie Wang,et al.  Parametric adaptive control of multimachine power systems with nonlinear loads , 2004, IEEE Transactions on Circuits and Systems II: Express Briefs.

[6]  S. M. Badran,et al.  Design of modulation controllers for AC/DC power systems , 1993 .

[7]  Yao-nan Yu,et al.  Optimal Power System Stabilization Through Excitation and/or Governor Control , 1972 .

[8]  V. G. D. C. Samarasinghe.  Stabilization of a multi-machine power system using nonlinear robust variable structure control , 1997 .

[9]  IEEE Report.  Dynamic Performance Characteristics of North American HVDC Systems for Transient and Dynamic Stability Evaluations , 1981, IEEE Transactions on Power Apparatus and Systems.

[10]  D. Hill,et al.  Nonlinear output stabilization control for multimachine power systems , 2000 .

[11]  Chang Hao.  Design of modulation controller to damp power oscillations of parallel AC line in the Tianshenqiao to Guangdong HVDC transmission , 1993, Proceedings of TENCON '93. IEEE Region 10 International Conference on Computers, Communications and Automation.

[12]  D. Hill,et al.  Stability theory for differential/algebraic systems with application to power systems , 1990 .

[13]  Newton G. Bretas,et al.  Linear matrix inequality based controller design with feedback linearisation: application to power systems , 2003 .

[14]  Wen-Shiow Kao.  The effect of load models on unstable low-frequency oscillation damping in Taipower system experience w/wo power system stabilizers , 2001 .

[15]  Luonan Chen,et al.  Stability analysis for digital controls of power systems , 2000 .

[16]  A. K. David,et al.  Multivariable adaptive control of AC-DC systems , 1994 .

[17]  Y.-Y. Hsu,et al.  Damping of a parallel AC-DC power system using PID power system stabilizers and rectifier current regulators , 1988 .

[18]  Adel A. Ghandakly,et al.  A parametrically optimized self-tuning regulator for power system stabilizers , 1992 .

[19]  J. F. Tang,et al.  Enhancement of AC/DC system performance by modulation of a proposed multiterminal DC system in the southwestern US , 1988 .

[20]  C. W. Taylor,et al.  Standard load models for power flow and dynamic performance simulation , 1995 .