Journal ArticleDOI
Physically Realizable Wide Power Range Optimal Controllers for Power Systems
B. Habibullah,Yao-nan Yu +1 more
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In this article, a physically realizable linear optimal controller in terms of easily measurable state variables for the stabilization of power system is developed, based on a fairly accurate fifth order synchronous machine and a first order voltage regulator.Abstract:
A physically realizable linear optimal controller in terms of easily measurable state variables for the stabilization of power system is developed in this paper. The controller is based on a fairly accurate fifth order synchronous machine and a first order voltage regulator. The transformation of the system equations into a cannonical form enables us to determine the weighting matrices Q and R of the quadratic cost function with simple procedure and to design an optimal controller which can stabilize a power system under widel. power range operating conditions. Transient response test on the nonlinear model proves the effectiveness of the linear control design.read more
Citations
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Journal ArticleDOI
A New Stabiliser Design Technique for Multimachine Power Systems
Choo-Min Lim,S. Elangovan +1 more
TL;DR: In this article, a new method of designing decentralised stabilisers for improved dynamic performance of multimachine power systems is presented, which determines the parameters of all stabilisers in the system such that some or all of its mechanical modes eigenvalues have desired locations in the complex plane.
Journal ArticleDOI
Design of a model reference adaptive stabilizer for the exciter and governor loops of power generators
Adel A. Ghandakly,Peter Idowu +1 more
TL;DR: A decentralized model reference adaptive control (DMRAC) scheme for the design of power system stabilizers and a means for coordinating the generating unit excitation and governor control loops is presented in this paper.
Journal ArticleDOI
A generalized approach to the analysis of voltage stability in electric power systems
TL;DR: In this paper, a linearized model in state space form of a multi-machine power system is presented, and rigorous voltage stability conditions are derived on the basis of a suitable aggregated model of original system capable of retaining the dynamics of voltages at generator and load nodes.
Journal ArticleDOI
Optimal output feedback control of power systems with high-speed excitation systems
TL;DR: In this paper, a linear, optimal, constant, feedback control system based on quantities easily measurable at the synchronous generator location is presented for power system equipped with fast-acting excitation systems.
Journal ArticleDOI
An optimal multivariable stabilizer for a multimachine plant
R.J. Fleming,J. Sun +1 more
TL;DR: It is shown that because the optimal multivariable stabilizer is based on the optimal interactive feedbacks between machines and between all the output variables, rather than a single variable feedback to an individual machine, it can damp out the various intermachine oscillations quickly and optimally even for a large disturbance.
References
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Journal ArticleDOI
Observers for multivariable systems
TL;DR: In this article, it was shown that the design of an observer for a system with M outputs can be reduced to the design for m separate observers for single-output subsystems.
Journal ArticleDOI
The Megawatt-Frequency Control Problem: A New Approach Via Optimal Control Theory
Charles E. Fosha,Olle I. Elgerd +1 more
TL;DR: This paper records the development of a state variable model of the megawatt-frequency control problem of multiarea electric energy systems in a mathematical form necessary for application of theorems of modem optimal control theory.
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Matrix Quadratic Solutions
TL;DR: Matrix quadratic equation solution derivation applied in finding steady state solutions of Riccati differential equations with constant coefficients was applied in this article, where the solution was derived by using a linear combination of matrix quadratics and constant coefficients.
Journal ArticleDOI
Application of an Optimal Control Theory to a Power System
TL;DR: An attempt is made to apply a certain class of optimal control theory to obtain an optimal controller to improve the dynamic response of a power system.
Journal ArticleDOI
Optimal Power System Stabilization Through Excitation and/or Governor Control
Hamdy A. M. Moussa,Yao-nan Yu +1 more
TL;DR: In this paper, a new method is developed to determine the weighting matrix Q of the performance function in conjunction with a left shift of the dominant eigenvalues as far as the practical controllers permit.