Now showing items 132-151 of 154
Raza, Muhammad (Date of defense: 2017-12-13)
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 ...
Aragüés Peñalba, Mònica (Date of defense: 2016-04-29)
This thesis deals with grid integration of oshore wind power plants through HVDC (High Voltage Direct Current) or HVAC (High Voltage Alternating Current) transmission . The behaviour of wind farms and their transmission ...
Solh Joukhah, Zahra (Date of defense: 2017-10-27)
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 ...
Westerman Spier, Daniel (Date of defense: 2022-06-30)
Modular Multilevel Converters (MMCs) are a type of Voltage Source Converter (VSC) which have become the preferred topology choice for High Voltage Direct Current (HVDC) applications. Compare to its HVDC converter predecessors, ...
Verdugo Retamal, Cristian Andrés (Date of defense: 2021-07-23)
Most of large scale photovoltaic systems are based on centralized configurations with voltage source converters of two or three output voltage levels connected to photovoltaic panels. With the development of multilevel ...
Mendoza Vizcaino, Fco. Javier (Date of defense: 2019-01-29)
The electric generation systems on islands are based generally on fossil fuel. This fact and its supply make the electricity cost higher than in systems used in the continent. In this thesis, as a first part, a review of ...
Ziegler, Andreas Rainer (Date of defense: 2022-10-27)
(English) Lithium-Ion Batteries (LIBs) are being used in more and more areas of application. At the same time, their chemical composition and their designs are constantly evolving. Major developments are also taking place ...
Li, Mingshen (Date of defense: 2023-01-23)
(English) In the grid-forming control of microgrids, the droop control is a widely used for the parallel operation of power inverters, but has some peculiarities as slow dynamic and inaccuracy in the power sharing. In the ...
Trujillo Caballero, Juan Carlos (Date of defense: 2012-03-03)
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 ...
Prieto Araujo, Eduardo (Date of defense: 2016-05-27)
This thesis discusses the control of different power converters that will have a key role in future offshore wind power systems, enabling the integration of the power generated by the wind turbines into the mainland ...
Trilla Romero, Lluís (Date of defense: 2013-11-15)
L'energia eòlica ha incrementat la seva presència a molts països i s'espera que tingui encara un pes més gran en la generació elèctrica amb la implantació de la tecnologia eòlica marina. En aquest context el desenvolupament ...
Valsera Naranjo, Eduardo (Date of defense: 2014-05-07)
The incorporation of high levels of small-scale non-dispatchable distributed generation is leading to the transition from the traditional 'vertical' power system structure to a 'horizontally-operated' power system, where ...
Monadi, Mehdi (Date of defense: 2016-12-14)
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 ...
Fillet Castella, Sergi (Date of defense: 2014-09-19)
This work deals with the study of Back-2-Back converters, with special emphasis on its effects on the common mode. For the study performed, a review of the different known causes for bearing currents and the contribution ...
Ramírez Pisco, Rodrigo (Date of defense: 2010-07-07)
La regulación de la actividad de la distribución, aspecto sobre el cual versa esta tesis, ha presentado un horizonte cambiante en los últimos años. Tales cambios se hallan relacionados con aspectos como:<br/>Retribución ...
Martínez Reyes, Jimmy Arturo (Date of defense: 2022-07-08)
In recent years, industries have chosen to invest in technology with the aim of making their processes more efficient and thus offering market products of higher quality. Nowadays it is very common for companies to use ...
Bakkar, Mostafa (Date of defense: 2022-02-07)
Distributed Generators (DGs) are sensible to voltage sags, so the protection devices must trip fast to disconnect the faulted part of the grid. The DG disconnection will not be desirable in the near future with a large ...
Blanqué Molina, Balduino (Date of defense: 2007-12-19)
En esta tesis se hacen contribuciones a la simulación interactiva de motores de reluctancia autoconmutados desde la perspectiva de la ingeniería concurrente.<br/>En primer lugar, después de una breve introducción histórica, ...
Gratacòs Prats, Jaume (Date of defense: 2016-01-18)
The optimal planning of the annual development tasks of a medium voltage power distribution network, to tackle the evolution of the demand with maximum levels of quality and continuity of service and minimum investment, ...
Cestau Cubero, Silvia (Date of defense: 2015-02-09)
This doctoral thesis analyses whether electric vehicle is technical, economic and environmental sustainable. We have studied a company fleet of electric vehicles which has a carsharing service for the retail department to ...