Pole-placement and model-order reduction techniques applied to a hydro-unit—system for dynamic stability improvement

Abstract A pole-placement method, which is amenable to either a complete or incomplete state (output) feedback, is employed to drastically improve the dynamic stability characteristics of a practical power system (original open-loop system) by designing a suitable controller (i.e. a closed-loop system) with output feedback. Furthermore, an adequate reduced-order model of the original system is obtained by using three distinct pole selection criteria. The pole-placement method is also used to design an appropriate closed-loop system of the attained reduced-order model based on complete state feedback.

[1]  W. Enright,et al.  On selecting a low-order model using the dominant mode concept , 1980 .

[2]  David Q. Mayne,et al.  Modal control of linear time invariant systems , 1970 .

[3]  N. Sinha,et al.  On the selection of states to be retained in a reduced-order model , 1984 .

[4]  Charles E. Fosha,et al.  Optimum Megawatt-Frequency Control of Multiarea Electric Energy Systems , 1970 .

[5]  T. Higgins,et al.  Modal Control: Theory and Applications , 1972 .

[6]  Charles E. Fosha,et al.  The Megawatt-Frequency Control Problem: A New Approach Via Optimal Control Theory , 1970 .

[7]  Ieee Report,et al.  Dynamic Models for Steam and Hydro Turbines in Power System Studies , 1973 .

[8]  P. N. Paraskevopoulos,et al.  Application of eigenvalue assignment techniques for damping power frequency oscillations , 1985 .

[9]  Z. Elrazaz,et al.  On the selection of the dominant poles of a system to be retained in a low-order model , 1979 .

[10]  IEEE Report.  Procedures for the Exchange of Power Plant and Load Data for Synchronous Stability Studies , 1981, IEEE Transactions on Power Apparatus and Systems.

[11]  B. Friedland,et al.  Routh approximations for reducing order of linear, time-invariant systems , 1975 .

[12]  M. Lal,et al.  Simplification of large system dynamics using a moment evaluation algorithm , 1974 .

[13]  E. Davison,et al.  On "A method for simplifying linear dynamic systems" , 1966 .

[14]  W. Wonham.  On pole assignment in multi-input controllable linear systems , 1967 .

[15]  Y. Shamash.  Linear system reduction using Pade approximation to allow retention of dominant modes , 1975 .

[16]  H. Seraji,et al.  Pole-shifting procedure for multivariable systems using output feedback , 1971 .

[17]  H. Seraji,et al.  A new method for pole placement using output feedback , 1978 .

[18]  John D'Azzo,et al.  Linear Control System Analysis and Design: Conventional and Modern , 1977 .

[19]  J. Hickin,et al.  Model reduction for linear multivariable systems , 1980 .

[20]  N. Ashoor,et al.  A note on low-order modeling , 1982 .

[21]  J. Ackermann.  Parameter space design of robust control systems , 1980 .