Programa de Doctorat en Enginyeria Elèctrica: Envíos recientes
Mostrando ítems 101-120 de 154
Analysis of the contribution of wind power plants to damp power system oscillations
Wind power has emerged as one of the most promising renewable energy sources. The very penetration levels of wind energy in power systems have altered several aspects of power system operation, such as system stability. ...
Aportacions a la modelització de la màquina d'inducció de gàbia d'esquirol
En aquesta tesi es tracten en profunditat diversos aspectes sobre la modelització de la màquina d’inducció de gàbia d’esquirol. En el primer capítol, a partir dels paràmetres i de les característiques elèctriques i ...
Determination of the induction machine parameters from starting transient measurements
This Thesis study the parameters estimation of the induction machine with the single-cage and doublecage models, using the stator currents, voltages and mechanical speed from a starting transient. The dynamic equations of ...
Aportacions a la transferència de tecnologia energètica aeroespacial: cap al vehicle verd construïble a Catalunya
El present treball, culmina un període de recerca que va començar amb l’observació i mesura dels rendiments dels primers vehicles elèctrics del mercat contemporani i de les tècniques d’optimització energètica aeroespacia ...
Common-mode voltage cancellation in single- and three-phase transformer-less PV power converters
Electrical Energy generation is an issue that is continuously cause of concern around the world. Many efforts have been done in this sense to cover the requirements of the constantly growing in the electrical energy demand. ...
Aportaciones al modelado de la generación fotovoltaica para la planificación de la red de distribución
In this thesis it have been explained the problems that the electric distribution companies in Spain have to plan and operate their power networks, having no detailed measurements of instant active power of a large number ...
Control of power electronic converters for the operation of wind generation
The present PhD thesis analyzes the modelling and control of the two main topologies of large scale variable speed wind turbines, the doubly fed induction generator and the permanent magnet synchronous generator wind ...
Modelado y estudio del líder descendente negarivo en una descarga eléctrica atmosférica y su influencia en la localización del punto de impacto del rayo
In lightning protection techniques a basic aspect is the identification of the impact point possible, which is determined by the evolution of the initial phase of the lightning, known as the stepped leader, the ground ...
Análisis de la evolución de la interoperabilidad y de la seguridad ferroviaria en Europa en el periodo 1991-2011 y propuestas de mejora
The object of this thesis is to analyze the evolution of railway interoperability and safety in Europe in the period 1991-2011. This pretends to assess what has been the legislative process at EU level in the last 20 ...
Power conditioner based fuel cell and backup power system with supercapacitor
PEMFCs are the most popular type of Fuel Cells (FCs) and traditionally use hydrogen as the fuel. One FC problem is its relative slow dynamics caused by the time constant of the hydrogen and oxygen supply systems that can ...
Advance control of multilevel converters for integration of distributed generation resources into ac grid
Distributed generation (DG) with a converter interface to the power grid is found in many of the green power resources applications. This dissertation describes a multi-objective control technique of voltage source ...
Induction heating converter's design, control and modeling applied to continuous wire heating
Induction heating is a heating method for electrically conductive materials that takes advantage of the heat generated by the Eddy currents originated by means of a varying magnetic field. Since Michael Faraday discovered ...
Aportaciones al diseño y caracterización del motor lineal de reluctancia autoconmutado
In this study two electromagnetic analytical models have been developed. From this models the main magnetic and mechanics characteristics are obtained, and also permit getting the principal dimensions of the LSRM. From ...
Modelización de los sistemas de electrificación ferroviaria, en corriente alterna y continua, con sistemas recuperadores de energía para el estudio de la eficiencia energética
A detail modelling of railway electrical system with energy storages devices is developed in this thesis in order to analyze most of the implemented railway electrical system. The modelling has been realized from a point ...
Estudio del circuito simetrizador Steinmetz en sistemas con polución armónica
The main bulk of electric power systems use a three¿phase configuration with an alternating current flow. Pursuing the optimal performance of these networks and avoiding possible technical problems, it is preferred ...
Energy storage systems integration into PV power plants
The boom experienced by renewable sources in recent years has changed their consideration as a marginal component of the electrical system mix into a major player with an important role in the demand coverage in many ...
Estudio del efecto de los huecos de tensión en el generador de inducción doblemente alimentado
The aim of this doctoral thesis is to analyse the dynamic behaviour of the doubly-fed induction generator exposed to voltage sags. This electrical machine is mainly used in variable-speed wind turbines. Due to the noticeable ...
Caracterización del comportamiento eléctrico, mecánico y térmico de compuestos poliméricos y con mezclas provenientes del reciclaje
This doctoral thesis studies the physical properties of polymeric composite materials, with the addition of ground tire rubber particles (GTR) and the use of any of these compounds for the electrical industry, either as a ...
Estudio y caracterización de cargas no lineales
As a continuation of the work done by the QSE (Electrical Supply Quality) research group at the UPC (Polytechnic University of Catalonia) on non-linear load modelling to determine harmonic distortion in electrical power ...
Aportaciones al filtrado híbrido paralelo en redes trifásicas de cuatro hilos
Este trabajo se dedica a analizar los diferentes elementos y estructuras de los filtros híbridos paralelo, aplicados a redes trifásicas de potencia. Y dentro de este campo, se concentra en el desarrollo de filtros híbridos ...
