Departament d'Enginyeria Elèctrica: Recent submissions
Now showing items 61-80 of 165
Aportaciones al análisis de faltas y técnicas de diagnostico en los accionamientos de reluctancia autoconmutados
`Today, the industry is facing a new way of organizing production, lndustry 4.0, which aims to create smart factories that improve the adaptability of the means of production, not only to produce more and better with lower ...
Analysis and implementation of a methodology for optimal PMa-SynRM design taking into account performances and reliability
Automotive applications focus to develop drive-train technologies with higher energy efficiency and lower environmental impact. Electric and hybrid vehicles are gaining popularity since they fulfill these requirements . ...
Custom power active transformer for flexible operation of power systems
This PhD dissertation proposes a new transformer, i.e., the Custom Power Active Transformer, characterized by a specific design of its magnetic circuit and auxiliary windings which allows shunt and series compensation to ...
Large scale photovoltaic power plants: configuration, integration and control
This thesis focuses on the operation and control of Large Scale Photovoltaic Power Plants (LS-PVPPs) according to grid code requirements with a special focus on the basic unit: the PV generator. The aim of this thesis is ...
Competitive power control of distributed power plants
Nowadays, the electrical energy sector is currently found in a dramatic changing paradigm, which moves towards an increasing trend in generating power at distribution levels, where electricity is typically consumed, by ...
Control and operation of wind power plants connected to DC grids
Remote offshore wind power plants (WPPs) are being linked through high-voltage de voltage-source converter (VSC-HVdc) transmission to the main grids. The current deployments of HVdc grid connections for offshore WPPs are ...
Impact of solar PV plants with synchronous power controllers on power system stability
The irruption of renewable energy sources with power electronics interfaces is transforming power systems. To minimize the possible adverse effects that these generating systems may have on the power grid, transmission ...
Offshore grid control of voltage source converters for integrating offshore wind power plants
The offshore grid in North and Baltic Sea can help Europe to achieve 2020 and 2030 renewable energy target to counter climate changes . The formation of offshore grid requires the interconnection between several offshore ...
Direct current control for grid connected multilevel inverters
Control schemes for inverters of different topologies and various numbers of voltage levels are of great interest for many standard as well as special applications. This thesis describes a novel, robust and high-dynamic ...
Operation of HVDC converters for transformer inrush current reduction
The present PhD thesis deals with transformer inrush current in offshore grids including offshore wind farms and High Voltage Direct Current (HVDC) transmission systems. The inrush phenomenon during transformers energization ...
Estudio y caracterización armónica de las lámparas fluorescentes compactas de baja potencia
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
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
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)
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
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
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
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
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
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
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. ...
