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1 to 17 of 17 results
  • Fixed frequency sliding mode-based robust inversion with a full-bridge current DC-link buck-boost

     Olm Miras, Josep Maria; Biel Sole, Domingo; Fossas Colet, Enric; Cardoner Parpal, Rafael
    Journal of the Franklin Institute
    Date of publication: 2014-01
    Journal article

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    The substitution of the original switches by a full bridge in a Non-Inverting Buck-Boost converter results in an inverter capable of carrying out step-down and step-up tasks as well under sliding mode control. The control law is implemented by means of the Zero Average Dynamics algorithm, which provides a fixed frequency operation and guarantees null error in each switching period, thus achieving a highly accurate tracking of periodic reference profiles. Furthermore, semi-infinite programming techniques are used to reduce power losses and, at the same time, prevent undesirable effects of control action saturation. The performance of the inverter is ensured to be robust in the face of bounded nonlinear and resistive loads. Realistic simulation results obtained with PSIMR software validate the proposed schemes.

    The substitution of the original switches by a full bridge in a Non-Inverting Buck-Boost converter results in an inverter capable of carrying out step-down and step-up tasks as well under sliding mode control. The control law is implemented by means of the Zero Average Dynamics algorithm, which provides a fixed frequency operation and guarantees null error in each switching period, thus achieving a highly accurate tracking of periodic reference profiles. Furthermore, semi-infinite programming techniques are used to reduce power losses and, at the same time, prevent undesirable effects of control action saturation. The performance of the inverter is ensured to be robust in the face of bounded nonlinear and resistive loads. Realistic simulation results obtained with PSIMR software validate the proposed schemes.

  • G2V and V2G operation 20 kW battery charger

     Escoda, Jordi; Fontanilles, Joan; Biel Sole, Domingo; Repecho Del Corral, Victor; Cardoner Parpal, Rafael; Griño Cubero, Roberto
    International Electric Vehicle Symposium and Exhibition
    Presentation's date: 2013-11-20
    Presentation of work at congresses

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    This paper presents a bidirectional on-board battery charger for Electric Vehicles designed to perform both Grid to Vehicle (G2V) and Vehicle to Grid (V2G) operation. The charger can also operate with single or three-phase power grid connection, regulates the battery charging current and presents input unity power factor. A high frequency three-phase transformer has been included in the charger, this providing galvanic isolation.

    This paper presents a bidirectional on-board battery charger for Electric Vehicles designed to perform both Grid to Vehicle (G2V) and Vehicle to Grid (V2G) operation. The charger can also operate with single or three-phase power grid connection, regulates the battery charging current and presents input unity power factor. A high frequency three-phase transformer has been included in the charger, this providing galvanic isolation.

    Postprint (author’s final draft)

  • Sliding mode control of a stand-alone wound rotor synchronous generator

     Muñoz Aguilar, Raul Santiago; Doria Cerezo, Arnau; Fossas Colet, Enric; Cardoner Parpal, Rafael
    IEEE transactions on industrial electronics
    Date of publication: 2011-10
    Journal article

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    This paper presents a sliding mode control for a wound rotor synchronous machine acting as an isolated generator. The standard dq model of the machine is connected to a resistive load. A switching function is defined in order to fulfill control objectives, and the ideal sliding dynamics is proved to be stable. From the desired surface, the standard sliding methodology is applied to obtain a robust and very simple controller. Numerical simulations and experimental results validate the control law and show good performance and a fast response to load and reference changes.

  • Best Presentation in Session Award (ACC2010, WeeC05)

     Costa Castelló, Ramon; Olm Miras, Josep Maria; Ramos Fuentes, German A.; Cardoner Parpal, Rafael
    Award or recognition

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  • Odd-harmonic repetitive control of an active filter under varying network frequency: a small-gain theorem-based stability analysis  awarded activity

     Olm Miras, Josep Maria; Ramos Fuentes, German A.; Costa Castelló, Ramon; Cardoner Parpal, Rafael
    American Control Conference
    Presentation's date: 2010-06-30
    Presentation of work at congresses

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    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 closedloop performance in spite of the possible frequency variations that may occur in the electrical network. As these changes affect the performance of the controller, the proposal includes a compensation technique consisting of an adaptive change of the digital controller’s sampling time according to the network frequency variation. However, this implies structural changes in the closed-loop system that may destabilize the overall system. Hence, this article is also concerned with closed-loop stability of the resulting system, which is analyzed using a robust control approach through the small gain theorem. Experimental results that indicate good performance of the closed-loop system are provided.

    Best Presentation in Session Award, que atorga la 2010 American Control Conference

  • Access to the full text
    Robust high-order repetitive control of an active filter using an odd-harmonic internal model  Open access

     Ramos Fuentes, German A.; Costa Castelló, Ramon; Olm Miras, Josep Maria; Cardoner Parpal, Rafael
    Annual Conference of the IEEE Industrial Electronics Society
    Presentation's date: 2010-07-07
    Presentation of work at congresses

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    Shunt active power filters have proven to be an efficient means to compensate for the negative effects of nonlinear and reactive loads on the power quality of the electrical distribution network. In this context, the control objective is to achieve a power factor close to 1, as well as load current harmonics and reactive power compensation. A useful control strategy for this purpose is repetitive control. However, the performance of repetitive controllers is strongly affected by frequency variations of the involved signals. This work analyzes the effect of such variations and describes the architecture of an odd-harmonic, high-order repetitive controller specifically designed to obtain robust closed-loop performance against frequency variations that may occur in the electrical network.

  • Odd-harmonic repetitive control of an active filter under varying network frequency: practical considerations

     Costa Castelló, Ramon; Olm Miras, Josep Maria; Ramos, Germán Andres; Cardoner Parpal, Rafael
    2010 IEEE Multi-Conference on Systems and Control
    Presentation's date: 2010-09-08
    Presentation of work at congresses

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    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 oddharmonic repetitive control, and aims at obtaining good closedloop performance in spite of the possible frequency variations that may occur in the electrical network. As these changes affect the performance of the controller, the proposal includes a compensation technique consisting of an adaptive change of the sampling time of the digital controller according to the network frequency variation. However, this implies structural changes in the closed-loop system that may eventually destabilize it. Hence, this article is also concerned with closed-loop stability of the resulting system, which is analyzed using a robust control approach that takes advantage of the small gain theorem. Experimental results reporting good performance of the closedloop system are provided.

  • Access to the full text
    High-Performance Control of a Single-Phase Shunt Active Filter  Open access

     Costa Castelló, Ramon; Griño Cubero, Roberto; Cardoner Parpal, Rafael; Fossas Colet, Enric
    IEEE transactions on control systems technology
    Date of publication: 2009-11
    Journal article

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    Shunt active power filters are devices, connected in parallel with nonlinear and reactive loads, which are in charge of compensating these characteristics in order to assure the quality of the distribution network. This paper analyzes the dynamics of a dc bus split-capacitor boost converter used as an active filter and proposes a control system which guarantees the desired closedloop performance (unity power factor and load-current harmonics and reactive-power compensation). The proposed controller is hierarchically decomposed into two control loops, one in charge of shaping the network current and the other in charge of assuring the power balance. Unlike previous works that appeared in the literature, both control loops are analytically tuned. This paper describes the analytical design of the controller and presents some experimental results that show the good performance of the closedloop system.

  • Control de un convertidor boost mediante realimentación lineal de la salida pasiva de la dinámica del error de estabilización: resultados experimentales

     Spinetti, M; Sira Ramírez, Hebertt J.; Biel Sole, Domingo; Cardoner Parpal, Rafael
    Seminario Anual de Automática, Electrónica Industrial e Instrumentación
    Presentation of work at congresses

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  • High performance control of a single-phase shunt active filter

     Costa Castelló, Ramon; Griño Cubero, Roberto; Fossas Colet, Enric; Cardoner Parpal, Rafael
    IEEE International Symposium on Industrial Electronics
    Presentation of work at congresses

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  • Digital Repetitive Control of a Three-Phase Four-Wire Shunt Active Filter

     Griño Cubero, Roberto; Cardoner Parpal, Rafael; Fossas Colet, Enric; Costa Castelló, Ramon
    IEEE transactions on industrial electronics
    Date of publication: 2007-06
    Journal article

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  • Compensador Selectivo de Corrientes Armónicas, Reactiva y de Desequilibrio.

     Griño Cubero, Roberto; Cardoner Parpal, Rafael; Costa Castelló, Ramon; Fossas Colet, Enric
    Date of request: 2007-01-11
    Invention patent

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    Compensador selectivo de corrientes armónicas, reactiva y de desequilibro.

    Compensador de corrientes eléctricas que comprende un convertidor de potencia, sensores de corrientes compensadoras y de carga, un filtro a la entrada del convertidor y medios de control digitales del convertidor que comprenden bancos de filtros selectivos para el análisis de las corrientes de carga, y cuyos sensores de las corrientes compensadoras están conectados a la salida del filtro por el lado de red y en el cual dichas corrientes compensadoras se controlan mediante una batería de resonadores digitales, eliminándose con gran efectividad los armónicos de conmutación de la PWM y haciendo innecesaria la utilización de otros filtros adicionales a este efecto, dotando al sistema de un funcionamiento correcto con cualquier nivel de cargas y de selección de compensación, y reduciendo así la posibilidad de tener resonancias indebidas entre la red, las cargas y el compensador.

  • Tracking Signal in a Centered Pulse ZAD Power Inverter

     Biel Sole, Domingo; Cardoner Parpal, Rafael; Fossas Colet, Enric
    The 2006 International Workshop on Variable Structure Systems
    Presentation of work at congresses

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  • Control Digital Repetitivo de un Filtro Activo Monofásico

     Costa Castelló, Ramon; Cardoner Parpal, Rafael; Griño Cubero, Roberto; Fossas Colet, Enric
    Convertronic
    Date of publication: 2005-09
    Journal article

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  • PCI DAS 4020 12 card library to use with RTLinux 3.1 and RTic.

     Cardoner Parpal, Rafael; Costa Castelló, Ramon
    Date: 2004-01
    Report

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  • Efficient Morphological Set Transformations on Line Drawings

     Cardoner Parpal, Rafael; Thomas Arroyo, Federico
    International journal of pattern recognition and artificial intelligence
    Date of publication: 1997-09
    Journal article

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  • Residuals + Directional Gaps= Skeletons

     Cardoner Parpal, Rafael; Thomas Arroyo, Federico
    Pattern recognition letters
    Date of publication: 1997-05
    Journal article

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