Examinando por Autor "Zambrano-Prada, David"

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    Control of a Bidirectional Cûk Converter Providing Charge/Discharge of a Battery Array Integrated in DC Buses of Microgrids
    (Applied Computer Sciences in Engineering, 2017-10-01) López-Santos, Oswaldo; Zambrano-Prada, David; Aldana-Rodríguez, Yeison A.; Esquivel-Cabeza, Harold A.
    This paper presents a proposal to charge and discharge valve-regulated lead-acid (VRLA) battery arrays integrated into microgrids by using the bidirectional Cûk converter with a multi-mode multi-loop control scheme based on sliding-mode control. The proposed control integrates the constant current - constant voltage - constant voltage charge method (CC-CV-CV) which is implemented using an inner current loop based on the sliding mode control of the input current of the converter and two nested outer loops based on the voltage and current of the battery. Conversely, the discharge is studied using two operational modes, one using a current reference given by a high level on a hierarchical structure and other using a current reference given by an outer Proportional-Integral (PI) controller regulating the voltage of the DC bus. The modelling of the bidirectional Cûk converter in these applications and its operational modes besides the analysis of the inner loop and the design criteria used in the synthesis of the outer loops are addressed. Simulation results are presented validating the control proposal.
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    Hybrid control scheme for a half-bridge inverter
    (IFAC-PapersOnLine, 2017-10-01) Albea Sanchez, Carolina; López-Santos, Oswaldo; Zambrano-Prada, David; Gordillo, Francisco; García, Germain
    This paper presents a control law based on Hybrid Dynamical Systems (HDS) theory for electronic inverters. This kind of systems are very suited for the use of such theory since they combine both kind of signals: continuous (voltages and currents) and discrete (on-off state of switches). Unlike previous applications of HDS to power converters, the studied problem can be considered as a tracking problem since the objective is to generate a desired ac voltage from a dc source. The effectiveness of the resultant control law is validated by means of simulations and experiments.
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    On the Practical Stability of Hybrid Control Algorithm With Minimum Dwell Time for a DC-AC Converter
    (IEEE Xplore, 2018-10-05) Albea Sanchez, Carolina; López-Santos, Oswaldo; Gordillo, Francisco; Zambrano-Prada, David; García, Germain
    This brief presents a control law based on a hybrid dynamical systems theory for a dc-ac converter. This theory is very suited for an analysis of power electronic converters, since it combines continuous (voltages and currents) and discrete (on-off state of switches) signals avoiding, in this way, the use of averaged models. Here, practical stability results are induced for this tracking problem, ensuring a minimum dwell time associated with an Linear–Quadratic Regulator (LQR) performance level during the transient response and an admissible chattering around the operating point. The effectiveness of the resultant control law is validated by means of experiments.