Browsing by Author "Morán, L."

Now showing 1 - 4 of 4
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    A series active power filter based on a sinusoidal current controlled voltage source inverter
    (IEEE, 1995) Dixon Rojas, Juan; Venegas Castro, Gustavo Adolfo; Morán, L.
    A series active power filter, working as a sinusoidal current source, in phase with the mains voltage, has been developed and tested. The amplitude of the fundamental current in the series filter is controlled through the error signal generated between the load voltage and a pre-established reference. The control allows an effective correction of power factor, harmonic distortion, and load voltage regulation.
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    An active power filter using single-phase NPC converters and predictive control for medium voltage distribution systems
    (IEEE, 2013) Acuña, P.; Morán, L.; Rivera Inalaf, Marco Antonio; Dixon Rojas, Juan, 1948-; Burgos, Rolando
    An active power filter implemented with three single-phase Neutral Point Clamped (NPC) converters is presented and analyzed. The proposed active power filter is aimed to compensate current harmonics and reactive power in three-phase medium voltage power distribution systems. A predictive control algorithm provides the switching states that ensure fast current tracking capability. To take advantage of the predictive control implementation simplicity, this paper includes useful information to replicate this implementation on similar topologies of multilevel converters. The proposed scheme presents lower line to line voltage harmonic distortion as well as an independent control in each phase, compared with the conventional three-phase NPC topology. Simulated results confirm the implementation viability of the proposed active power filter topology and associated control strategy.
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    Cascaded Nine-Level Inverter for Hybrid-Series Active Power Filter, Using Industrial Controller
    (2010) Varschavsky Páez, Alexander; Dixon Rojas, Juan; Rotella Macchiavello, Mauricio Humberto; Morán, L.
    An industrial controller, specifically designed for two- and three-level converters, was adapted to work on an asymmetrical nine-level active power filter (APF). The controller is now able to make all required tasks for the correct operation of the APF, such as current-harmonic elimination and removal of high-frequency noise. The low switching-frequency operation of the nine-level converter was an important advantage in the application of the industrial controller. In addition, with the nine-level filter, switching losses were significantly reduced. The filter was designed to work as voltage source and operates as harmonic isolator, improving the filtering characteristics of the passive filter. The control strategy for detecting current harmonics is based on the “ p-q theory †and the phase-tracking system in a synchronous reference frame phase-locked loop. The dc-link voltage control is analyzed together with the effect of controller gain and delay time in the system's stability. Simulations for this application are displayed and experiments in a 1-kVA prototype, using the aforementioned industrial controller, were tested, validating the effectiveness of this new application.
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    Improved Active Power Filter Performance for Renewable Power Generation Systems
    (2014) Acuña, P.; Morán, L.; Rivera, M.; Dixon Rojas, Juan; Rodriguez, J.