Now showing items 21-40 of 47

    • Estudio de algoritmos de seguimientos del punto de máxima potencia en sistemas fotovoltaicos 

      González Sobrino, Lucía Leticia (Universitat Politècnica de Catalunya, 2018-10-25)
      Bachelor thesis
      Open Access
      Lanecessitat de trobar formes eficaces per l’aprofitament d’energies renovables es troba en auge a causa del’enorme demanda energètica de la societat actual. L’objectiu d’aquest present projecte és desenvolupar ...
    • Fixed switching frequency sliding mode control using an hysteresis band controller 

      Repecho del Corral, Víctor; Biel Solé, Domingo; Fossas Colet, Enric (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Conference report
      Restricted access - publisher's policy
      This paper presents a hysteresis band controller in charge of fixing the switching frequency of a sliding mode controller. The proposed control measures the switching period of the control signal and modifies the hysteresis ...
    • Fractional DC/DC converter in solar-powered electrical generation systems 

      Martínez González, Rubén; Bolea Monte, Yolanda; Grau Saldes, Antoni; Martínez García, Herminio (2010)
      Conference report
      Restricted access - publisher's policy
      This paper deals with the fractional modelling of a DC-DC buck-boost converter, suitable in solarpowered electrical generation systems, and the design of a fractional controller for the aforementioned switching converter. ...
    • Galerkin method and approximate tracking in a non-minimum phase bilinear system 

      Fossas Colet, Enric; Olm Miras, Josep Maria (American Institute of Mathematical Sciences, 2007-01)
      Article
      Open Access
      The tracking control of non-minimum phase systems is nowadays an open and challenging field, because a general theory is still not available. This article proposes an indirect control strategy in which a key role is played ...
    • Grid-connected to/from off-grid transference for micro-grid inverters 

      Heredero Peris, Daniel; Chillón Antón, Cristian; Pages Gimenez, Marc; Gross, Gabriel Igor; Montesinos Miracle, Daniel (2013)
      Conference lecture
      Restricted access - publisher's policy
      This paper compares two methods for controlling the on-line transference from connected to stand-alone mode and vice versa in converters for micro-grids. The first proposes a method where the converter changes from CSI ...
    • Implementació d'algorismes de seguiment del punt de màxima potència en plataforma Raspberry Pi 

      Calafat Perelló, Mateu (Universitat Politècnica de Catalunya, 2019-09-30)
      Bachelor thesis
      Open Access
      Aquest treball parteix de la necessitat que té la societat d’avui en dia de desenvolupar-se d’una forma més sostenible i respectuosa amb el medi ambient, degut a la creixent emissió de gasos d’efecte hivernacle (CO2, ...
    • Improvement of Up-converters linearity for Ka-band operation 

      Bertran Albertí, Eduardo; Berenguer Sau, Jordi; Montoro López, Gabriel; Gilabert Pinal, Pere Lluís; Cidronali, Alessandro (2007-12)
      Conference lecture
      Open Access
      The application of a digital predistorter to the linearisation of a Ka-band mixer is presented herein. The general objective in the TX design is to get the best trade-off between linearity and costs. This require the most ...
    • Interleaving quasi-sliding-mode control of parallel-connected buck-based inverters 

      Ramos Lara, Rafael Ramón; Biel Solé, Domingo; Fossas Colet, Enric; Guinjoan Gispert, Francisco (Institute of Electrical and Electronics Engineers (IEEE), 2008-11)
      Article
      Open Access
      An interleaving fixed-switching-frequency quasi-sliding control algorithm based on the zero average dynamics approach is reported and applied to the design of a modular system of parallel-connected single-phase inverters. ...
    • Losses and CMV evaluation in transformerless grid-connected PV topologies 

      Vázquez Guzmán, Gerardo; Kerekes, Tamas; Rolán Blanco, Alejandro; Aguilar Gaván, Daniel; Luna Alloza, Álvaro; Acevedo, Gustavo (2009)
      Conference lecture
      Open Access
      Controlling the thermal losses in the semiconductors ~s well. as the Co~mon Mode Voltage (CMV), are important Issues In the design of power electronics converters for photovoltaic applications. At present time there are ...
    • Matrix converter applied to energy saving for street lighting systems 

      Román Lumbreras, Manuel; Velasco Quesada, Guillermo; Conesa Roca, Alfons (IEEE Computer Society Publications, 2010-04-25)
      Conference report
      Open Access
      This work presents a three-phase AC-AC converter, with independent phase control, based on matrix-converter structure. This converter is applied to electrical energy saving on the public lighting systems by means of ...
    • Modelado de instalaciones fotovoltaicas conectadas a red 

      Roca Ferrandiz, Guillem (Universitat Politècnica de Catalunya, 2015-06-10)
      Bachelor thesis
      Open Access
    • Modeling and simulation of a MMC-based solid-state transformer 

      Adabi Firouzjaee, Mohammad Ebrahim; Martínez Velasco, Juan Antonio; Alepuz Menéndez, Salvador (2017-02-16)
      Article
      Restricted access - publisher's policy
      This paper presents a model of a bidirectional MV/LV solid-state transformer (SST) for distribution system studies. A modular multilevel converter configuration is used in the MV side of the STT. The LV side uses a three-phase ...
    • Modulation and capacitor voltage balancing control of a three-level NPC dual-active-bridge DC-DC converter 

      Filbà Martínez, Àlber; Busquets Monge, Sergio; Bordonau Farrerons, José (2013)
      Conference report
      Restricted access - publisher's policy
    • Multichannel high-power high-frequency converters for induction heating 

      Martín Segura, Guillermo; Sala Pérez, Pau; Montesinos Miracle, Daniel; Ferrater Simón, María Misericordia; López Mestre, Joaquim (2013)
      Conference lecture
      Restricted access - publisher's policy
      This paper studies a converter structure based on the connection of basic topologies to form a multichannel converter for induction heating applications. The aim of using basic topologies is to provide a reduction of ...
    • 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 ...
    • Optimal injection of harmonics in circulating currents of modular multilevel converters for capacitor voltage ripple minimization 

      Picas Prat, Ricard; Pou Félix, Josep; Ceballos Recio, Salvador; Zaragoza Bertomeu, Jordi; Konstantinou, Georgios; Agelidis, Vassilios (2013)
      Conference report
      Restricted access - publisher's policy
      This paper proposes an algorithm to calculate the optimal amplitude and phase of the harmonic current components that can be injected in the circulating currents of a modular multilevel converter (MMC) to minimize the ...
    • Power-quality improvement of a stand-alone induction generator using a STATCOM with battery energy storage system 

      Barrado, J.A.; Griñó Cubero, Robert; Valderrama Blavi, H. (2010-10)
      Article
      Open Access
      This paper presents a STATCOM with a self-oscillating bidirectional dc-dc converter for interfacing battery energy storage in a stand-alone induction generator system. The self-oscillation mode is based on relay feedback ...
    • Pulsewidth modulations for the comprehensive capacitor voltage balance of n-level three-leg diode-clamped converters 

      Busquets Monge, Sergio; Alepuz Menéndez, Salvador; Rocabert Delgado, Joan; Bordonau Farrerons, José (2009-05)
      Article
      Open Access
      In the previous literature, the introduction of the virtual-space-vector (VV) concept for the three-level, three-leg neutral-point-clamped converter has led to the definition of pulsewidth modulation (PWM) strategies, ...
    • Pulsewidth modulations for the comprehensive capacitor voltage balance of n-level two-leg diode-clamped converters 

      Busquets Monge, Sergio; Alepuz Menéndez, Salvador; Rocabert Delgado, Joan; Bordonau Farrerons, José (2009-08)
      Article
      Restricted access - author's decision
      In the previous literature, the introduction of the virtual space vector concept for the three-level three-leg neutral-point-clamped converter has led to the definition of pulsewidth modulation (PWM) strategies guaranteeing ...
    • Result-consistent counter sampling scheme for coarse-fine TDCs 

      Michalik, Piotr Jozef; Fernandez, D.; Madrenas Boadas, Jordi (Institution of Electrical Engineers, 2012-09-13)
      Article
      Restricted access - publisher's policy