Adaptive Voltage Control in Power Systems: Modelling, Design by Giuseppe Fusco

By Giuseppe Fusco

Adaptive Voltage regulate in strength structures, a self-contained mixture of idea and novel software, deals in-depth remedy of such adaptive keep watch over schemes. assurance strikes from power-system-modelling difficulties via illustrations of the most adaptive keep an eye on platforms, together with self-tuning, model-reference and nonlinearities repayment to an in depth description of layout equipment: Kalman filtering, parameter-identification algorithms and discrete-time controller layout are all represented. Case reviews deal with purposes matters within the implementation of adaptive voltage regulate.

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This change in the topology of the network determines the begin of the third operating point.

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.

2 Indirect Self-tuning Voltage Regulator Design 41 with λ the forgetting factor, and (tc,k ) = (tc,1 ) . . 9) An estimator dead-zone with hysteresis, represented by the function β(tc,k ), is introduced in the RLS algorithm to switch off the estimator when the excitation level is low. The function β(tc,k ) takes the form ⎧ 2 1 if (tc,k ) > β0 2dz ⎪ ⎪ ⎨ 2 2 (tc,k ) ≤ β0 2dz β(tc,k ) = β(tc,k−1 ) if dz ≤ ⎪ ⎪ ⎩ 2 0 if (tc,k ) < 2dz with β(0) = 1, where 2dz is an empirically selected threshold that activates the dead-zone and β0 is an arbitrary positive constant that sets the width of the hysteresis.

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