Universitat Politècnica de Catalunya
Now showing items 129-148 of 156
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 ...
A prerequisite for safe and stable operation of an electric power system is the accurate and reliable measurement of the system parameters, in particular, current and voltage. Conventionally, this has been achieved on High ...
La trompa d'aigua o trompa dels Pirineus és el giny hidropneumàtic pel qual s'introduïa aire al forn en el procediment català d'obtenció directa del ferro a partir dels seus minerals, o de la Farga Catalana. En aquest ...
Ens proposem fer girar tubs de material conductor (coure o alumini) de diferents llargades i diàmetres. Aquest tub que hom vol fer girar és el secundari d'una màquina elèctrica d'inducció, i actua de rotor o part ...
En la tesis, se estudian máquinas eléctricas de flujo axial con rotor conductor sin elementos ferromagnéticos. Se pretende construir un motor de flujo axial, que se alimente con densidades de corriente elevadas para arrastrar ...
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 ...
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 ...
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 ...
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, ...
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 ...
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 ...
(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 ...
(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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
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 ...
