Universitat Politècnica de Catalunya
Mostrando ítems 61-80 de 157
In order to reach the goal set in the Paris agreement of limiting the rise in global average temperature well below 2 ºC compared to pre-industrial levels, massive efforts to reduce global greenhouse gas emissions are ...
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 ...
(English) High voltage direct current (HVDC) technologies have been used for bulk power transmission over long distances since the 1950s. These technologies have proven to be the most cost-efficient compared to the high ...
Since early times in internet, there have been training experiences with different success. Sometimes because they were complicated to use, others for the state of technology, or because the public has not supported it. ...
En el trabajo de investigación desarrollado en esta Tesis se propone una modelización completa y a la vez sencilla del transformador y trifásico de tres columnas para el funcionamiento en condiciones de saturación del ...
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, ...
(English) The proliferation of batteries for local storage and electric vehicles (EVs) is rising steadily. The EV market’s prospects point to exponential growth in the coming years. This trend has also contributed to the ...
Les societats modernes plantegen nous reptes que demanden noves maneres de tractar els projectes d'enginyeria. Els enginyers han d'afrontar aquests reptes i desenvolupar solucions òptimes i eficients pels problemes clàssics ...
Offshore wind is an emerging energy sector with a huge potential to be tapped in the near future. Offshore Wind Power Plants (OWPPs) are becoming increasingly relevant in Europe and worldwide mainly because the wind speeds ...
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 ...
(English) The aim of this thesis work is the development of a VHF broadband interferometer for lightning research. The observations with this instrument allowed us to investigate some unsolved aspects of lightning related ...
The advent of HTLS (High Temperature, Low Sag) conductors imposes more severe operating conditions on devices such as substation connectors intended for transmission and distribution systems, which are subjected to higher ...
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 ...
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 ...
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 ...
El avance de las tecnologías de los microprocesadores y ordenadores ha permitido sustituir las protecciones electromecánicas y analógicas clásicas por protecciones digitales. Sin embargo, los algoritmos empleados en éstas ...
Este trabajo se enmarca dentro de la calidad del suministro de energía eléctrica y, en concreto, en el efecto que producen los huecos de tensión en las máquinas de inducción y en los transformadores trifásicos.<br/>En ...
According to reliable statistics, electrical fire ignition sources have a notable impact regarding the generation of fires and explosions. Electrical equipment and installations can also be the victims of fire. This is due ...
Speckle noise appears when coherent illumination is employed, as for example Laser, Synthetic Aperture Radar (SAR), Sonar, Magnetic Resonance, X-ray and Ultrasound imagery. Backscattered echoes from the randomly distributed ...
(English) The rapid advancement of digitalization, combined with the integration of renewable generation and the development of information and communication technologies within the distribution network, is accelerating ...
