Programa de Doctorat en Enginyeria Elèctrica: Recent submissions
Now showing items 61-80 of 162
Harmonic load flow formulation and numerical resolution
As a continuation of the work done by the QSE (Electrical Supply Quality) research group at the UPC (Polytechnic University of Catalonia) on harmonic load flow in electric power networks, this thesis aims to study existing ...
Contribution to the operation of smart rural distribution grid with energy resources for improvement of the quality of service
This Thesis aims for contributing in the deployment and operation of Smart Grid, in isolated rural areas. As it would be expected, technological developments and investments in the electrical field have mainly focused on ...
Feeder flow control and operation in large scale photovoltaic power plants and microgrids : Part I Feeder ow control in large scale photovoltaic power plants : Part II Multi-microgrids and optimal feeder ow operation of microgrids
This thesis deals with the integration of photovoltaic energy into the electrical grid. For this purpose, two main approaches can be identified: the interconnection of large scale photovoltaic power plants with the ...
Improved control for multilevel inverters in grid applications
Control systems for three-phase grid connected voltage source inverters (VSI) play an important role in energy transformation systems . They are expected to be stable, robust and accurate during steady state as well as ...
Development of reduced-scale tests for HTLS substation connectors
Power distribution networks face the upcoming challenge of managing the increase of power demand predicted worldwide. Power grid capacity is limited by the number of lines deployed and their characteristics, including ...
Multi-objective optimization of an energy hub using artificial intelligence
The present dissertation is focused on the energy optimization of systems which contain multiple energy carriers. The objective of the research is the development of a methodology and the corresponding software tools, which ...
Automatic fault location in electrical distribution networks with distributed generation
Nowadays the electrical network is continuously evolving due to the increasing deployment of Information Technologies and the Distribution Energy Resources. This scenario affects directly to the quality of service in the ...
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 . ...
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 ...
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 ...
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 ...
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. ...
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 ...
