Exploració per autor "Riba Ruiz, Jordi-Roger"
Ara es mostren els items 149-168 de 168
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Temperature dependence of density and viscosity of vegetable oils
(2012-07)
Article
Accés obertThe straight use of vegetable oils as fuel in diesel engines entails adjusting several physical properties such as density and viscosity. By adequately heating the vegetable oil before entering the injection system, its ... -
Thermal behavior of energy-efficient substation connectors
(2016)
Text en actes de congrés
Accés obertThe contact resistance is the key variable that characterizes the stable performance and long-term service of an electrical connection. It is worth noting that the contact resistance in substation connectors can be several ... -
Thermal response estimation in substation connectors using data-driven models
(2016-08-15)
Article
Accés obert -
Three-dimensional finite-element analysis of the short-time and peak withstand current tests in substation connectors
(2016-05-30)
Article
Accés obertPower devices intended for high-voltage systems must be tested according to international standards, which includes the short-time withstand current test and peak withstand current test. However, these tests require very ... -
Time series RUL estimation of medium voltage connectors to ease predictive maintenance plans
(2020-12-17)
Article
Accés obertThe ageing process of medium voltage power connectors can lead to important power system faults. An on-line prediction of the remaining useful life (RUL) is a convenient strategy to prevent such failures, thus easing the ... -
Tracking resistance in polymeric insulation materials for high-voltage electrical mobility applications evaluated by existing test methods: identified research needs
(Multidisciplinary Digital Publishing Institute (MDPI), 2023-09-10)
Article
Accés obertWith the increasing electrification of the transportation and mobility sectors, polymer insulation materials are inevitably exposed to harsher environments, including exposure to contamination, wide temperature ranges, ... -
Transformer modelling considering power losses using an inverse Jiles-Atherton approach
(Elsevier, 2023-12)
Article
Accés obertPower transformers are devices with non-linear behavior due to the saturation of the ferromagnetic core. When modelling such devices, the saturation effect must be taken into account because it greatly affects their ... -
Transient thermal modelling of short-circuit test for conductors by means of dimensional reduction
(2016)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper proposes a fast and accurate method to simulate the temperature rise due to a short-circuit condition in power conductors of aluminum based on one-dimensional reduction and the application of the finite difference ... -
Transient thermal modelling of substation connectors by means of dimensionality reduction
(2017-01-25)
Article
Accés obertThis paper proposes a simple, fast and accurate simulation approach based on one-dimensional reduction and the application of the finite difference method (FDM) to determine the temperatures rise in substation connectors. ... -
UHV connectors: optimization
(2011-05-31)
Report de recerca
Accés restringit per acord de confidencialitatThis document includes the optimization of substation connector geometries and protections for ± 800 kV DC and 1200 kV AC transmission systems. Connectors were obtained from SBI Connectors catalog using current geometries ... -
UHV connectors: review 1
(2010-04-10)
Report de recerca
Accés restringit per acord de confidencialitatIn this document the state of art of UHV connectors is analyzed and the main factors such as geometry, corona and bundle among others are analyzed. -
UHV connectors: review 2
(2010-05-03)
Report de recerca
Accés restringit per acord de confidencialitatIn this document the state of art of UHV connectors is analyzed and the main factors such as geometry, corona and bundle among others are analyzed. -
Uprating of transmission lines by means of HTLS conductors for a sustainable growth: challenges, opportunities, and research needs
(2020-12-01)
Article
Accés obertThis paper provides a comprehensive and critical review and evaluation of the technological state-of-the-art of high-temperature low-sag (HTLS) conductors by analyzing research articles, theses, reports, white papers and ... -
Use of DSLR and sonic cameras to detect and locate high-voltage corona discharges
(Multidisciplinary Digital Publishing Institute (MDPI), 2022-09-24)
Article
Accés obertCorona discharges are a concern in high-voltage applications. It is of utmost importance to detect and locate the discharges at an early stage using simple methods for this purpose. This paper evaluates and compares the ... -
Use of Rapeseed Straight Vegetable Oil as Fuel Produced in Small-Scale Exploitations
(Intech, 2011-08-01)
Capítol de llibre
Accés obertThis chapter presents a method to produce rapeseed and process it to obtain rapeseed oil and rapeseed cake meal from a small-scale point of view. It also shows how rapeseed oil can be used as fuel in diesel engines for ... -
Using CMOS image sensors to determine the intensity of electrical discharges for aircraft applications
(Multidisciplinary Digital Publishing Institute, 2022-08-27)
Article
Accés obertThe development of more electric aircrafts (MEA) and all electric aircrafts (AEA) inevitably implies an increase in electric power and a consequent increase in distribution voltage levels. Increased operating voltages ... -
Using Life Cycle Thinking and Assessment for industrial waste management policy making
(2009)
Text en actes de congrés
Accés obert -
Utilització de l'oli de colza com a biocarburant en explotacions agrícoles
(2010-01-01)
Report de recerca
Accés restringit per política de l'editorialLa utilització de l’oli de colza com a carburant és una tecnologia que ja s’utilitza a altres països europeus com Alemanya i Dinamarca, degut principalment a dos factors: el gasoil agrícola està menys subvencionat i el ... -
Voltage correction factors for air-insulated transmission lines operating in high-Altitude regions to limit corona activity: a review
(Multidisciplinary Digital Publishing Institute (MDPI), 2018-07-21)
Article
Accés obertNowadays there are several transmission lines projected to be operating in high-altitude regions. It is well known that the installation altitude has an impact on the dielectric behavior of air-insulated systems. As a ... -
Water-pumping permanent magnet synchronous motor optimization based on customized torque-speed operating area and performance characteristics
(Institute of Electrical and Electronics Engineers (IEEE), 2019)
Comunicació de congrés
Accés obertThis paper presents a novel methodology for optimizing Permanent Magnet Synchronous Motors for Water-Pumping applications. The algorithm is designed to start the optimization process from a predefined ...
