Now showing items 41-60 of 76

  • Models and procedures for electric energy distribution planning. A review 

    Sempértegui, Rodrigo; Bautista Valhondo, Joaquín; Griñó Cubero, Robert; Pereira Gude, Jordi (International Federation of Automatic Control (IFAC), 2002-07-21)
    Article
    Open Access
    Distribution system planning is a key component to accomplish the service in a fast growing demand market, both from a technical point of view and from the economic costs management. In the near future, electric companies ...
  • Moving towards the maximum speed in stepping motors by means of enlarging the bandwidth of the current controller 

    Arias Pujol, Antoni; Caum Aregay, Jesús; Griñó Cubero, Robert (2016-12-01)
    Article
    Open Access
    This paper pursues to maximise the mechanical speed when using stepping motors (SM) without position sensors in order to achieve a rapid-response manufacturing whenever any equipment based on such electrical machines is ...
  • Nonlinear control design and averaging analysis of a full-bridge boost rectifier 

    Abouloifa, A; Giri, F.; Lachkar, I.; Chaoui, F.Z.; Griñó Cubero, Robert (2010-01)
    Article
    Open Access
    We are considering the problem of controlling AC/DC full bridge converters. The control objectives are twofold:(i) guaranteeing a regulated voltage for the supplied load, (ii) enforcing power factor correction (PFC) with ...
  • Nonlinear control of single-phase shunt active power filter. Theoretical analysis of closed-loop performances. 

    Lachkar, I.; Giri, F.; Abouloifa, A; Guerrero Zapata, Josep Maria; Griñó Cubero, Robert; Chaoui, F.Z; Elfadil, H. (2011)
    Conference lecture
    Open Access
    The problem of controlling single-phase shunt active power filter is addressed in presence of nonlinear loads. The control objective is twofold: (i) compensation of harmonic and reactive currents absorbed by the nonlinear ...
  • Nonlinear Systems Identification Using Additive Dynamic Neural Networks--Two On Line Approaches. 

    Griñó Cubero, Robert; Cembrano Gennari, Gabriela; Torras, Carme (Institute of Electrical and Electronics Engineers (IEEE), 2000-02)
    Article
    Open Access
    This paper proposes a class of additive dynamic connectionist (ADC) models for identification of unknown dynamic systems. These models work in continuous time and are linear in their parameters. Also, for this kind of model ...
  • Nouveau routeur dynamique prenant en compte les pertes : Théorie et résultats expérimentaux 

    Ramírez, Victor; Ortega, Romeo; Sánchez-Squella, Antonio; Bethoux, Olivier; Griñó Cubero, Robert (2012)
    Conference report
    Restricted access - publisher's policy
    Dans de nombreux r eseaux, la r egulation e cace du transfert d' energie entre les sous-syst emes de production, de stockage et d'utilisation demeure un sujet di cile a traiter. Les auteurs proposent ici une nouvelle ...
  • Odd-Harmonic Digital Repetitive Control of a Single-Phase Current Active Filter 

    Costa Castelló, Ramon; Griñó Cubero, Robert; Fossas Colet, Enric (Institute of Electrical and Electronics Engineers (IEEE), 2004-07)
    Article
    Open Access
    Shunt active power filters have been proved as useful elements to correct distorted currents caused by nonlinear loads in power distribution systems. This work presents an all-digital approach, based on the repetitive ...
  • On existence and stability of equilibria of dc LTI circuits with constant power loads 

    Barabanov, Nikita; Ortega, Romeo; Griñó Cubero, Robert; Polyak, Boris (2016)
    Conference report
    Open Access
    This paper studies the problem of existence and stability of equilibria of dc linear time–invariant circuits with constant power loads. First, we correct an unfortunate mistake in our previous work [10] pertaining to the ...
  • On existence and stability of equilibria of linear time-invariant systems With constant power loads 

    Barabanov, Nikita; Ortega, Romeo; Griñó Cubero, Robert; Polyak, Boris (2016-01-01)
    Article
    Open Access
    The problem of existence and stability of equilibria of linear systems with constant power loads is addressed in this paper. First, we correct an unfortunate mistake in our recent paper [10] pertaining to the sufficiency ...
  • On Existence of equilibria of multi-port linear AC networks with constant-power loads 

    Machado, Juan E.; Griñó Cubero, Robert; Barabanov, Nikita; Ortega, Romeo; Polyak, Boris (2017-10-01)
    Article
    Open Access
    This paper explores the problem of stability of linear time-invariant (LTI), multi-port AC circuits with instantaneous constant-power loads (CPLs), which model the behavior of some point-of-load converters. It is well-known ...
  • On the stability of discrete-time active damping methods for VSI converters with a LCL input filter 

    Orellana Barceló, Marcos; Griñó Cubero, Robert (2012)
    Conference report
    Restricted access - publisher's policy
    The use of LCL filters with VSI converters is interesting since they present good attenuation of current ripple at high frequencies. Nevertheless, they also present a high resonance peak which can cause undesired oscillations, ...
  • Optimal priority ordering in optimal PHP production of multiple part-types on a failure-prone machine with quadratic buffer costs 

    Corominas Subias, Albert; Griñó Cubero, Robert; Pastor Moreno, Rafael (2004-10)
    External research report
    Open Access
    Shu and Perkins deals with the problem of minimising the expected sum of quadratic buffer cost when a single, failure-prone machine produces multiple part-types. They restrict the set of control policies to the class of ...
  • Optimización de las estrategias de control de redes de transporte hidráulico 

    Aliaga, Carlos; Griñó Cubero, Robert; Barraco Serra, Marc (Fundación para el Fomento de la Ingeniería del Agua, 1998-06)
    Article
    Open Access
    El presente artículo presenta una metodología de optimización de las estrategias de mando en redes de transporte hidráulico. Concretamente, el método consiste en la expansión temporal del problema de optimización con ...
  • Output voltage regulation of a high-efficiency high step-up DC-DC power converter 

    Malo Barragán, Shane Leonardo; Griñó Cubero, Robert (Institute of Electrical and Electronics Engineers, 2007)
    Conference report
    Open Access
    Step-up dc-dc power converters are needed in many applications. Depending on the voltage conversion ratio, one or another structure should be chosen, usually leading to efficiency vs. conversion ratio trade-offs. Recently, ...
  • Phase-Locked Loop using a comb filter with fractional delay 

    Griñó Cubero, Robert; Mughal, Umair Najeeb (2011-05)
    External research report
    Open Access
    A Phase Locked Loop is a feedback system combining a Voltage Controlled Oscillator and a Phase Comparator These are connected so that the oscillator maintains a constant phase angle relative to a reference signal. Phase ...
  • Plataforma experimental para el desarrollo y evaluación de sistemas de generación híbridos basados en pilas de combustible. 

    Talpone, J.L.; Puleston, Paul; More, J.J.; Griñó Cubero, Robert; Cendoya, M.G. (2011)
    Conference report
    Open Access
    La creciente demanda de energía, la constante disminución de las fuentes de origen fósil y la preocupación por el deterioro del medio ambiente, han volcado la atención mundial a las tecnologías basadas en fuentes de energía ...
  • Power–factor compensation is equivalent to cyclodissipassivation 

    García Canseco, Eloísa; Ortega, Romeo; Griñó Cubero, Robert; Stankovic, Alexander (Institute of Electrical and Electronics Engineers, 2007-07)
    Conference report
    Open Access
    In a previous work we have identified the key role played by the concept of cyclodissipativity in the solution of the power–factor–compensation problem for electrical circuits with general nonlinear loads and operating in ...
  • Power-factor compensation of electrical circuits. A framework for analysis and design in the nonlinear nonsinusoidal case. 

    García Canseco, Eloísa; Griñó Cubero, Robert; Ortega, Romeo; Salichs Vivancos, Miguel; Stankovic, Alexander (Institute of Electrical and Electronics Engineers, Inc., 2007-04-30)
    Article
    Open Access
    This article advances an analysis and compensator design framework for power-factor compensation based on cyclodissipativity. Although the framework applies to general polyphase unbalanced circuits, this paper have focused ...
  • Power factor compension of electrical circuits: a control theory wiewpoint 

    García Canseco, Eloísa; Griñó Cubero, Robert; Ortega, Romeo; Salichs Vivancos, Miguel; Stankovic, Alexander (2005-10)
    Conference report
    Open Access
    The purpose of this paper is to bring the attention of the control community some of the aspects of the practically important, and mathematically challenging, power factor compensation problem. Our main contribution is ...
  • Power flow limitations for LCL grid-connected power converters 

    Orellana Barceló, Marcos; Griñó Cubero, Robert (2014)
    Conference report
    Open Access
    The controllers of VSI Power Converters connected to the electrical grid can produce line currents in phase (or not) with respect to the phase-to-neutral voltages. The amplitude of the currents and the phase difference are ...