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Although many control systems are influenced by static non-linearities, most current hands-on laboratories will not show this type of behavior. An analog board module, along with the classic setup plants, would provide a series of nonlinearities, whose effect could be studied and comprehended by students. This paper describes the mentioned analog board module, focusing on the dead-zone nonlinearity.
Shunt active power filters are proved as useful elements to correct the distorted currents caused by nonlinear loads in power distribution systems. This work presents an all digital approach, based on the repetitive control technique, for their control. The design is performed for the particular case of singlephase shunt active filter with a full-bridge boost topology. Several simulation results are...
Repetitive Control includes an Internal Model with high gain and slow time response characteristics which make it prone to the windup effect. A solution to this problem is the inclusion of an Anti-Windup compensator. Although there exist many general Anti-Windup synthesis methods in literature, some problems can arise as a result of a straightforward application of them in Repetitive Control. This...
This work deals with the design and analysis of a controller for a shunt active power filter. The design is based on combined feedforward and feedback actions, the last using repetitive control, and aims at the obtention of a good closed-loop performance in spite of the possible frequency variations that may occur in the electrical network. As these changes affect the performance of the controller,...
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