Recent Submissions

  • Estudio y caracterización armónica de las lámparas fluorescentes compactas de baja potencia 

    Cunill Solà, Jordi (Universitat Politècnica de Catalunya, 2018-01-30)
    Doctoral thesis
    Open Access
    This Doctoral Thesis is framed within the generic issue of power quality and more specifically in the study and harmonic characterization of low power compact fluorescent lamps (CLFs) with integrated ballast, also called ...
  • Advanced modeling of solid state transformer 

    Adabi Firouzjaee, Mohammad Ebrahim (Universitat Politècnica de Catalunya, 2018-01-25)
    Doctoral thesis
    Open Access
    The solid state transformer (SST) is seen as a proper replacement of the conventional iron-and-copper transformer in the future smart grid . The SST offers several benefits (e.g. enhanced power quality performance or ...
  • Anàlisi experimental de la problemàtica de càrrega-descàrrega de ACEE aplicables en transports 

    Garrigosa i Garcia, Ramón (Universitat Politècnica de Catalunya, 2017-09-15)
    Doctoral thesis
    Open Access
    lt's a well-known fact that the flywheel stores energy inside, and this energy is proportional to the rotational speed and the moment of inertia. lf the moment of inertia increases, the energy increases in the same proportion ...
  • Stand-alone hybrid renewable energy systems (HRES) 

    Martínez Díaz, Maria del Mar (Universitat Politècnica de Catalunya, 2017-07-14)
    Doctoral thesis
    Open Access
    End of Energy Poverty and achieving Sustainable Energy for all by 2030 is a universal challenge. 1.3 billion people without energy access and 2.8 billion people using unsustainable solid fuel for cooking and heating are ...
  • High frequency modeling of power transformers under transients 

    Imdad, Kashif (Universitat Politècnica de Catalunya, 2017-07-17)
    Doctoral thesis
    Open Access
    This thesis presents the results related to high frequency modeling of power transformers. First, a 25kVA distribution transformer under lightning surges is tested in the laboratory and its high frequency model is proposed. ...
  • Control of grid connected power converters with grid support functionalities 

    Zhang, Weiyi (Universitat Politècnica de Catalunya, 2017-06-01)
    Doctoral thesis
    Open Access
    The installation of power generation systems based on renewable energy sources has been increasing exponentially over the last decades. However, in spite of the well-known merits of such energy sources, the expansion of ...
  • Ultra-low power circuits based on tunnel FETs for energy harvesting applications 

    Cavalheiro, David (Universitat Politècnica de Catalunya, 2017-05-19)
    Doctoral thesis
    Open Access
    There has been a tremendous evolution in integrated circuit technology in the past decades. With the scaling of complementary metal-oxide-semiconductor (CMOS) transistors, faster, less power consuming and more complex chips ...
  • Modular multilevel converters for power system applications 

    Ferreira, Abel António de Azevedo (Universitat Politècnica de Catalunya, 2017-03-31)
    Doctoral thesis
    Open Access
    This thesis discusses the operation of the grid-tied modular multilevel converters (MMC) applied on the dc power transmission, particularly on the medium and high-voltage applications. First, it is presented the evolution ...
  • Control contributions to AC microgrid inverters 

    Heredero Peris, Daniel (Universitat Politècnica de Catalunya, 2017-03-24)
    Doctoral thesis
    Open Access
    This thesis is focused on the microgrid control framework. Specifically, it is concentrated on alternative current microgrids. As a result of the author involvement in different industrial projects concerning microgrids ...
  • Desarrollo de herramientas constructivistas para la publicación y personalización de contenidos de cursos en línea 

    García Fernández, Javier, 1973 (Universitat Politècnica de Catalunya, 2016-01-11)
    Doctoral thesis
    Open Access
    Since early times in internet, there have been training experiences with different success. Sometimes because they were complicated to use, others for the state of technology, or because the public has not supported it. ...
  • Analysis and control of multi–area HVDC interconnected power systems by using virtual inertia 

    Rakhshani, Elyas (Universitat Politècnica de Catalunya, 2016-12-14)
    Doctoral thesis
    Open Access
    Virtual inertia is known as an inevitable part of the modern power systems. Recent trend of research is oriented in different methods of emulating virtual inertia in different part of the systems. This dissertation is ...
  • Protection and fault management in active distribution systems 

    Monadi, Mehdi (Universitat Politècnica de Catalunya, 2016-12-14)
    Doctoral thesis
    Open Access
    The integration of renewable energy resources (RES), as a type of distributed generation (OG) units, is increasing in distribution, systems. This integration, changes the topology, performance and the operational aspects ...

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