Now showing items 26-45 of 157
García Quintanilla, José Ignacio (Date of defense: 2022-01-17)
With the increasing development of renewable energy sources and their integration into the grid, international standards require next-generation plants to achieve the same levels of reliability and performance as the current ...
Candelo Zuluaga, Carlos Andres (Date of defense: 2022-01-11)
In the recent years, water pumping and other hydraulic applications are increasingly demanding motors capable to operate under different working conditions, including variable pressure and volumetric flow demands. Moreover, ...
Roslan, Nurul Fazlin (Date of defense: 2021-12-16)
Distributed Generation (DG) provides an alternative to the Centralized Generation (CG) by means of generating electricity near to the end user of power with the employment of small-scale technologies to produce electricity, ...
Salvador Yuste, Albert (Date of defense: 2021-11-12)
In an increasingly technological society,vulnerability to the effects of lightning is also increasing. The implementation of monitoring and surveillance systems in real time of lightning activity can greatly improve the ...
Munné Collado, Íngrid (Date of defense: 2021-10-01)
On the way towards a low carbon electricity system, flexibility has become one of the main sources for achieving it. Flexibility can be understood as the ability of a power system to cope with the variability and uncertainty ...
Fuentes Ruiz, Sergio (Date of defense: 2021-10-22)
Climate change is real. Global human population is growing as never before. Natural resources are limited. These factors have taken different countries to embrace new pathways in order to fulfill the energy needs of their ...
Rey Fernández, José Antonio (Date of defense: 2021-08-04)
This doctoral thesis investigates the current distribution in a wind turbine blade when it is struck by lightning. The thesis focuses on the problem of current distribution in blades with carbon fiber spar caps. In the ...
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 ...
Razmjoo, Ali (Armin) (Date of defense: 2021-02-19)
The main aim of this thesis is investigating energy sustainability in developing countries using useful indicators. As it is known, serious issues such as global warming and inefficient consumption of energy will lead to ...
Villa-Arrieta, Manuel (Date of defense: 2019-07-22)
The increase in the energy consumption of cities forecasted for the coming years makes these urban areas tend to be representative of the energy sustainability of their countries. In this sense, on the basis of the analysis ...
Sánchez Sánchez, Enric (Date of defense: 2020-12-21)
High Voltage Direct Current (HVDC) is a power electronics -based technology that enables the transmission of large amounts of power over long distances, the integration of remote offshore wind power to the main land, and ...
Kadechkar, Akash (Date of defense: 2020-10-07)
The increased dependency on electricity of modern society, makes reliability of power transmission systems a key point. This goal can be achieved by continuously monitoring power grid parameters, so possible failure modes ...
Olivella Rosell, Pol (Date of defense: 2020-01-31)
In the context of distributed generation growth, local grids could face operational issues. In that sense, smart grid deployment will give information to local grid operators about grid status at medium and low voltage ...
Serrano-Fontova, Alexandre (Date of defense: 2020-06-09)
This thesis aims to investigate an unexpected islanding operation (IO) which has been identified in a real distribution network. The process of recording and processing the data obtained from the field measurements in the ...
Agbemuko , Adedotun Jeremiah (Date of defense: 2019-11-08)
The proposals for large-scale deployment of renewable energy sources is leading to the need for more cross-border interconnections creating a pan-European power system, at the EU level. Such interconnections may take ...
López Trujillo, Jesús Alberto (Date of defense: 2019-06-21)
This thesis presents a characterization of the charge structures of thunderstorms and lightning leader development, and their relationship with the emissions of terrestrial gamma ray flashes (TGFs). The results include a ...
Sau Bassols, Joan (Date of defense: 2019-06-28)
Meshed High Voltage Direct Current (HVDC) grids are seen as solution to transmit and exchange high amounts of power across long distances or using submarine cables with high levels of flexibility and redundancy. Also, they ...
Resch, Matthias (Date of defense: 2019-01-31)
The increasing integration of renewable energy installations at the distribution grid level has led to a strong increase in grid reinforcement measures in recent years. Since the costs are being passed on to the general ...
Asef, Pedram (Date of defense: 2019-01-31)
This Ph.D. thesis illustrates a novel study on the analytical and numerical design optimization of radial-flux permanent magnet synchronous wind generators (PMSGs) for small power generation in an urban area, in which an ...
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 ...