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  • Comparative analysis of lattice-based all-pass filter and second order generalized integrator as orthogonal system generator of a pll 

    Belandria, Luciano Emilio; Agudelo, Nancy Alejadra; Bergas Jané, Joan Gabriel (2021-01-01)
    Article
    Open Access
    This paper presents a steady-state comparison of two methods that generate an orthogonal voltage system for a single-phase Phase-Locked Loop (PLL) structure: a widely accepted one based on a Second Order Generalized ...

  • Over-frequency support in large-scale photovoltaic power plants using non-conventional control architectures 

    Madorell Batlle, Queralt; Bullich Massagué, Eduard; Cheah Mañé, Marc; Gomis Bellmunt, Oriol (2021-05)
    Article
    Restricted access - publisher's policy
    Large scale photovoltaic power plants must provide a frequency regulation service, which is defined in the grid codes. This service has commonly required a response time between 15 and 30 s. But some countries are now ...

  • Reducing cell to cell variation of lithium-ion battery packs during operation 

    Andreas, Ziegler; Oeser, David; Hein, Thiemo; Montesinos Miracle, Daniel; Ackva, Ansgar (Institute of Electrical and Electronics Engineers (IEEE), 2021)
    Article
    Open Access
    In this work, an experimental approach to reduce the variation from cell to cell during battery operation is evaluated to reach a better battery utilization. Numerous theoretical considerations of intelligent battery ...

  • Multiport interline current flow controller for meshed HVDC grids 

    Sau Bassols, Joan; Ferrer San José, Ricard; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2020-07-01)
    Article
    Restricted access - publisher's policy
    In meshed high voltage direct current grids, the current of each line cannot be controlled independently, since it depends on the resistances between nodes. Additional devices, such as current flow controllers (CFCs), may ...

  • Maximum torque per voltage flux-weakening strategy with speed limiter for PMSM drives 

    Miguel Espinar, Carlos; Heredero Peris, Daniel; Gross, Gabriel Igor; Llonch Masachs, Marc; Montesinos Miracle, Daniel (Institute of Electrical and Electronics Engineers (IEEE), 2020-09-02)
    Article
    Open Access
    This paper presents an enhanced Flux Weakening (FW) control scheme for Permanent Magnet Synchronous Motors (PMSMs), focused on electric vehicle applications. The novelty of the proposed algorithm is the integration in a ...

  • Optimal current reference calculation for MMCs considering converter limitations 

    Westerman Spier, Daniel; Prieto-Araujo, E.; López Mestre, Joaquim; Gomis Bellmunt, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2020-08-31)
    Article
    Open Access
    The paper addresses an optimization-based reference calculation method for Modular Multilevel Converters (MMC) operating in normal and constrained situations (when the converter needs to prioritize its quantities as it has ...

  • Review of local network impedance estimation techniques 

    Kervyn De Meerendre, Mathieu; Prieto Araujo, Eduardo; Ahmed, Khaled H.; Gomis Bellmunt, Oriol; Xu, Lie; Egea Àlvarez, Agustí (Institute of Electrical and Electronics Engineers (IEEE), 2020-11-24)
    Article
    Open Access
    As a result of increasing variability of network impedance, interest in impedance estimation techniques is growing. This review contextualises local impedance estimation techniques by providing a historical prospective on ...

  • Optimal dc voltage and current control of an lcc hvdc system to improve real-time frequency regulation in rectifier-and inverter-side grids 

    Kwon, Do-Hoon; Kim, Young-Jin; Gomis Bellmunt, Oriol (2020-11-01)
    Article
    Open Access
    High-voltage direct-current (HVDC) systems for constant or intermittent power delivery have recently been developed further to support grid frequency regulation (GFR). This paper proposes a new control strategy for a ...

  • Mejora de eficiencia energética en redes de distribución 

    Ramírez Pisco, Rodrigo; Pezzini, Paola; Villafafila Robles, Roberto (Grupo Tecnipublicaciones, 2008-02-01)
    Article
    Restricted access - publisher's policy

  • Single-phase PLL based on an adaptive notch filter 

    Belandria, Luciano Emilio; Bergas Jané, Joan Gabriel (2020-09-01)
    Article
    Open Access
    Single-Phase Phase-Locked Loops (PLL) have become a crucial component of grid-tied power converters. PLL accuracy and fast response are important for control and protection purposes, especially in the presence of voltage ...

  • Sistemas de cable superconductor para trasmisión de energía 

    del Rosario Calaf, Gerard; Villafafila Robles, Roberto; Lloret Gallego, Pau; Sudrià Andreu, Antoni (Grupo Tecnipublicaciones, 2008-10)
    Article
    Restricted access - publisher's policy
    La superconductividad es una propiedad física que tienen determinados materiales, llamados superconductores, que consiste en una resistencia eléctrica virtualmente nula cuando se encuentran por debajo de una temperatura, ...

  • Embotellando energía: el sueño de los eléctricos 

    Mascarell, Eduardo; Villafafila Robles, Roberto (Grupo Tecnipublicaciones, 2009-05)
    Article
    Restricted access - publisher's policy
    La electricidad se genera en el mismo instante en que se consume porque, hasta ahora, no se ha podido almacenar en cantidades significativas. La evolución de la tecnología está permitiendo pensar que en un futuro esto sí ...

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