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

By Giuseppe Fusco

Adaptive Voltage keep watch over in energy structures, a self-contained combination of concept and novel software, bargains in-depth remedy of such adaptive keep an eye on schemes. insurance strikes from power-system-modelling difficulties via illustrations of the most adaptive regulate 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 handle purposes concerns within the implementation of adaptive voltage keep an eye on.

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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]. 2. 15) where D δ(tc,k ) is a pulse. It can be easily recognized that v0,1 (tc,k ) is a step function. v0,1 (tc,k ) u(tc,k ) z −d B(z −1 ) A(z −1 ) + v1 (tc,k ) Fig. 8. 16) where −1 −nB + B + (z −1 ) = 1 + b+ + .

ASF topology with a VSI For voltage harmonic control at a busbar of an electrical system, both CSI and VSI provided with a current control loop can be modeled as ideal harmonic current generators. In fact, the bandwidth frequency of such devices is significantly higher than the frequencies considered in harmonic voltage control design. Hybrid shunt filters (HSFs) are characterized by the combination of ASF and passive filters. In their topology the ASF is connected to a passive shunt filter rather than directly to the power system.

6. D δ(tc,k ) A(z −1 ) Ad (z −1 ) r(tc,k ) h0 + − Fv−1 (z −1 ) uv (tc,k ) −1 A−1 d (z ) z −d B(z −1 ) + A−1 (z −1 ) v1 (tc,k ) ν(tc,k ) G(z −1 ) Fig. 6. 36b) where polynomials A(z −1 ) and B(z −1 ) are replaced with their estimates A(z −1 ) and B(z −1 ). 27) in which A(z −1 ) is replaced with A(z −1 ). 14), where B(z −1 ) substitutes for B(z −1 ). 33). An alternative design procedure employs the estimate of the amplitude D of the unknown no-load voltage disturbance to realize a compensating action in the control law.

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