By Giuseppe Fusco

ISBN-10: 1846285658

ISBN-13: 9781846285653

Power caliber is a urgent problem in electrical energy platforms. one of many major necessities of strength caliber administration is the warrantly of a sinusoidal voltage waveform with enough amplitude at every one node of the community. The fulfilment of the sort of keep watch over goal is facilitated through adaptive platforms that can account for unpredictable fluctuations in working conditions.

Adaptive Voltage keep an eye on in energy Systems, a self-contained mixture of thought and novel program, is an in-depth therapy of such adaptive keep watch over schemes. The reader strikes from power-system-modelling difficulties via illustrations of the most adaptive keep watch over structures (self-tuning, model-reference and nonlinearities reimbursement) to a close description of layout equipment: Kalman filtering, parameter-identification algorithms and discrete-time controller layout are all represented. Case reports deal with purposes concerns within the implementation of adaptive voltage control.

Practicing engineers and researchers in strength platforms and regulate engineering will locate this monograph, written by means of representatives of every box, to be a invaluable synthesis of either whereas its available kind also will attract graduate students.

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Extra info for Adaptive Voltage Control in Power Systems - Modeling, Design and Applications

Example text

Consequently, all the local frequency/active power regulators of the synchronous generators connected to the system cooperate to control the system frequency thus interacting through the load-flow equations. On the other hand, when considering the voltage/reactive power control problem, the effect of local nodal voltage controller actions on local variables and their interaction through the power-flow balance equations is often weak enough to be neglected. From previous considerations, in the case of local nodal voltage amplitude control at fundamental and harmonic frequencies, power system steady-state models in the frequency domain [30,76] are usually adopted, such as those represented by a simple short-circuit impedance or by the Thevenin equivalent circuit as seen from the controlled bus.

12) so that the desired characteristics, expressed in terms of closed-loop requirements, are satisfied. The major points in favor of the pole-assignment technique are that it provides a robust regulator against modeling errors and can cope with nonminimum phase systems [2, 12]. 2 Indirect Self-tuning Voltage Regulator Design 43 The first step in pole-assignment design is to decide the location of closedloop poles. On this point, it is always useful to keep in mind that the control effort required is related to how far the open-loop poles are moved by the feedback.

2 illustrates how the estimate θ is recursively obtained at each tc,k . v1 (tc,k ) + − + θ(tc,k ) m(tc,k ) + θ(tc,k−1 ) v1 (tc,k ) φT (tc,k ) z −1 Fig. 2. 9) The updating law of the covariance matrix is given by 1 Inp − m(tc,k ) φT (tc,k ) P(tc,k−1 ) λ is the np -dimensional identity matrix. 10) all elements of matrix P are scaled by the same amount. If one wishes to target the effect upon selected parameters it is possible to scale only the diagonal of P. Furthermore, it is useful to point out that in order to get smooth parameters estimation a minimum forgetting factor λmin has to be specified.

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