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

By Giuseppe Fusco

Adaptive Voltage keep watch over in strength platforms, a self-contained mix of thought and novel program, deals in-depth therapy of such adaptive keep watch over schemes. insurance strikes from power-system-modelling difficulties via illustrations of the most adaptive keep an eye on structures, together with 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 stories deal with functions matters within the implementation of adaptive voltage keep an eye on.

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Extra info for Adaptive Voltage Control in Power Systems: Modelling, Design and Applications (Advances in Industrial Control)

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16) where −1 −nB + B + (z −1 ) = 1 + b+ + . . + b+ nB + z 1 z −1 −nB − B − (z −1 ) = b0 + b− + . . + b− nB − z 1 z and nB = nB + + nB − . Usually it is realistic to assume nB − = 0, except for some specific cases, such as voltage regulation at midpoint of a long transmission line [97], which yield to a nonminimum phase model (nB − = 0). 14) approximates the relationship between u(tc,k ) and v1 (tc,k ) at the controlled node. 9. In some cases, further improvement of the accuracy of the time domain model can be obtained by including also a white noise term, which takes into account the noise due to measurement devices and to commutations in the power electronic apparatus.

Staring from this consideration, the pole-shifting technique can be usefully applied in the voltage regulation problem to vary the locations of the desired closed-loop poles, represented by the roots of polynomial T (ρ, z −1 ), in such a way that the limits imposed by the actuator are taken into account in the design of the control input [51]. It is then admissible to suppose that the two dominant poles of T (ρ, z −1 ) belong to a domain in the z-plane characterized by a constant damping ratio locus (cardioid) [99] to satisfy closed-loop specifications concerning the allowed largest overshoot.

3. If the initialization matrix R0 is symmetric and positive definite, if ∀ k ∈ N0 Qw,k = Qw , with Qw a diagonal matrix whose diagonal elements satisfy the following condition: qw,j = qw,j−1 > 0 for j = 2, 4, . . , 2nh , ˆ k asympand if ∀ k ∈ N0 we have Q. ,k = Q. > 0, then the matrices Rk and R ˆ totically reach values Rk,∞ and Rk,∞ which are constant in the rotating frame of the observable direction hk . 34 3 Voltage and Current Phasor Identification Proof. 12): hT k Rk hk = Q. T hk Rk hk + Q.

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