Download Adaptive Voltage Control in Power Systems - Modeling, Design by Giuseppe Fusco PDF

By Giuseppe Fusco

Power caliber is a urgent main issue in electrical energy structures. one of many major requisites 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 regulate aim is facilitated by means of adaptive structures that may account for unpredictable fluctuations in working conditions.

Adaptive Voltage keep an eye on in strength Systems, a self-contained mixture of concept and novel software, 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 an eye on platforms (self-tuning, model-reference and nonlinearities reimbursement) to an in depth description of layout tools: Kalman filtering, parameter-identification algorithms and discrete-time controller layout are all represented. Case experiences handle purposes concerns within the implementation of adaptive voltage control.

Practicing engineers and researchers in strength structures and regulate engineering will locate this monograph, written via representatives of every box, to be a worthy synthesis of either whereas its available sort also will attract graduate students.

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

Sample text

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. If one wishes to keep the estimator more sensitive to the power system changes at the steady-state operating point a maximum forgetting factor λmax can be used, that is 0 < λmin ≤ λ ≤ λmax ≤ 1 However the use of a forgetting factor can cause the phenomenon known as estimator wind-up.

18) where ν(tc,k ) is an uncorrelated zero mean random sequence with variance σ02 . 10: A(z −1 ) v1 (tc,k ) = z −d B(z −1 ) u(tc,k ) + A(z −1 ) D δ(tc,k ) + ν(tc,k ) Ad (z −1 ) D δ(tc,k ) A(z −1 ) Ad (z −1 ) u(tc,k ) z −d B(z −1) + A−1 (z −1) v1 (tc,k ) ν(tc,k ) Fig. 10. 19) 3 Voltage and Current Phasor Identification The first task faced in voltage control design is to identify voltage and current phasor components at various frequencies. The problem is essentially to evaluate the coefficients of the Fourier series of a periodic time signal, assuming its periodicity is known.

3 Power System Equivalent Models 25 D δ(tc,k ) A(z −1 ) Ad (z −1 ) v0,1 (tc,k ) u(tc,k ) z −d B(z −1) A−1 (z −1) + v1 (tc,k ) Fig. 9. 18) where ν(tc,k ) is an uncorrelated zero mean random sequence with variance σ02 . 10: A(z −1 ) v1 (tc,k ) = z −d B(z −1 ) u(tc,k ) + A(z −1 ) D δ(tc,k ) + ν(tc,k ) Ad (z −1 ) D δ(tc,k ) A(z −1 ) Ad (z −1 ) u(tc,k ) z −d B(z −1) + A−1 (z −1) v1 (tc,k ) ν(tc,k ) Fig. 10. 19) 3 Voltage and Current Phasor Identification The first task faced in voltage control design is to identify voltage and current phasor components at various frequencies.

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