Get Adaptive Voltage Control in Power Systems - Modeling, Design PDF

By Giuseppe Fusco

ISBN-10: 1846285658

ISBN-13: 9781846285653

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

Adaptive Voltage regulate in energy Systems, a self-contained combination of conception and novel software, is an in-depth remedy of such adaptive keep watch over schemes. The reader strikes from power-system-modelling difficulties via illustrations of the most adaptive regulate structures (self-tuning, model-reference and nonlinearities repayment) to an in depth description of layout tools: Kalman filtering, parameter-identification algorithms and discrete-time controller layout are all represented. Case reviews handle purposes matters within the implementation of adaptive voltage control.

Practicing engineers and researchers in energy platforms and keep watch over engineering will locate this monograph, written by means of representatives of every box, to be a precious synthesis of either whereas its available variety also will entice graduate students.

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

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Concerning the order of the dynamic model, in [57] the order is chosen so as to minimize the prediction error but may therefore be very high, whereas in [84] a basic first-order model is assumed. 14) where tc,k = k Tc , k ∈ N0 , Tc being the sampling period and z −1 the unit backward shift operator. 14) the polynomials A(z −1 ) and B(z −1 ) take the form A(z −1 ) = 1 + a1 z −1 + . . + anA z −nA B(z −1 ) = b0 + b1 z −1 + . . + bnB z −nB with b0 = 0; furthermore v1 (tc,k ) is the controlled nodal voltage, u(tc,k ) is the input to the actuator, d is a positive integer representing a delay and v0,1 (tc,k ) the no-load voltage representing the nodal voltage when u(tc,k ) = 0, see [76].

The amplitude and the phase of the harmonic current phasors depend on the nodal voltage waveform and on the value of the firing angle α(t). Assuming a perfectly-sinusoidal nodal voltage and indicating its amplitude with v1 , the amplitude of the hth harmonic current is given by f (α) = 2 − ih (t) = h sin α(t) cos hα(t) − cos α(t) sin hα(t) 4yR v1 (t) π h(h2 − 1) for h = 5, 7, 11, . . 10) Finally it must be noted that a complete SVS model should include the dynamic response of the power electronic apparatus, which represents the actual variation of the thyristor firing angle α(t) in response to variation of the SVS input command u(t).

1. Overview of a self-tuning scheme The class of self-tuning regulators can be thought of as composed of three main parts: a parameter estimator, a linear controller and a third part, implementing the synthesis law, which relates the controller parameters to the estimated parameters. The true parameter values are replaced by their estimated values (certainty equivalence principle) when determining the control law using the design criteria. The regulator parameters are in general a nonlinear function of the estimated parameters.

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Adaptive Voltage Control in Power Systems - Modeling, Design and Applications by Giuseppe Fusco


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