Browsing by Subject "Descàrregues elèctriques"
Now showing items 1-20 of 21
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A closer look at lightning reveals needle-like structures
(Macmillan Publishers, 2019-04-17)
Article
Open AccessStructural features have been identified on positively charged lightning channels that are not present on negatively charged ones. The discovery could explain why these two types of channel have different behaviours. -
A propagative model for simulations of electric fields produced by downward leaders
(2012-07-13)
Article
Open AccessComparisons of simulated downward negative leaders with experimental measurements are presented in this paper. In order to simplify, the leaders are considered to progress vertically and charge distributions and leader ... -
Aircraft Charging and its Influence on Triggered Lightning
(2020-01-16)
Article
Open AccessThis paper reports on a laboratory experiment to study the effect of vehicle net charge on theinception of a positive leader from an aircraft exposed to high atmospheric electric fields. The experimentmodels the first stage ... -
Analysis of thunderstorm systems and lightning activity associated with sprites
(2006)
Conference lecture
Restricted access - author's decision -
Arc fault protections for aeronautic applications: a review identifying the effects, detection methods, current progress, limitations, future challenges, and research needs
(2022-01-11)
Article
Open AccessArc faults are serious discharges, damaging insulation systems and triggering electrical fires. This is a transversal topic, affecting from residential to aeronautic applications. Current commercial aircrafts are being ... -
Dielectric charge measurements in capacitive microelectromechanical switches
(American Institute of Physics, 2006-09-06)
Article
Restricted access - publisher's policyMeasurements of transient currents from the discharge of microelectromechanical capacitive switches after charging the dielectric with an ion gun are reported. It is shown that both the charge sign and the charge amount ... -
Estudi de descàrregues elèctriques atmosfèriques sobre aerogeneradors
(Universitat Politècnica de Catalunya / Universitat de Barcelona, 2013-06)
Master thesis
Open Access -
Estudio de descargas atmosféricas en redes aéreas de distribución
(Universitat Politècnica de Catalunya, 2015-05-05)
Bachelor thesis
Restricted access - confidentiality agreement -
Estudio de descargas eléctricas atmosféricas sobre aerogeneradores. Parte II
(Universitat Politècnica de Catalunya / Universitat de Barcelona, 2013)
Master thesis
Open AccessLa norma IEC 61400-24:2010 Aerogeneradores - Parte 24: Protección contra el rayo establece una metodología base para la estimación de descargas atmosféricas sobre aerogeneradores individuales. Pero no establece de forma ... -
Experimental study of visual corona under aeronautic pressure conditions using low-cost imaging sensors
(Multidisciplinary Digital Publishing Institute (MDPI), 2020-01-11)
Article
Open AccessVisual corona tests have been broadly applied for identifying the critical corona points of diverse high-voltage devices, although other approaches based on partial discharge or radio interference voltage measurements are ... -
High-speed observations of transient luminous events and lightning (The 2008/2009 Ebro Valley campaign)
(2010)
Conference lecture
Restricted access - author's decision -
Influència de les descàrregues atmosfèriques a les Smart Grids
(Universitat Politècnica de Catalunya / Universitat de Barcelona, 2012-01)
Master thesis
Open AccessLes descàrregues atmosfèriques, són un fenomen complex i han calgut molts anys d’estudiar-lo per arribar a modelitzar-lo. S’ha observat que el llamp té un efecte molt important sobre les línies elèctriques, especialment ... -
Investigation of corona discharges in cylindrical geometries: application to wind turbines and aircraft
(Universitat Politècnica de Catalunya, 2021-06-22)
Bachelor thesis
Open AccessL’objectiu principal d’aquesta tesis és crear un codi que simuli les condicions i el desenvolupament de les descàrregues elèctriques, que estudiï les descàrregues de corona en aquestes condicions i que es pugui adaptar a ... -
Modelado y estudio del líder descendente negarivo en una descarga eléctrica atmosférica y su influencia en la localización del punto de impacto del rayo
(Universitat Politècnica de Catalunya, 2012-07-17)
Doctoral thesis
Open AccessIn lightning protection techniques a basic aspect is the identification of the impact point possible, which is determined by the evolution of the initial phase of the lightning, known as the stepped leader, the ground ... -
Obtención de la deformada de un arco sometido a cargas estáticas mediante el tratamiento de imagen DIC
(Universitat Politècnica de Catalunya, 2021-11-01)
Bachelor thesis
Restricted access - author's decisionA lo largo del tiempo se han utilizado infinidad de herramientas para el cálculo de estructuras, ya sea para el análisis de reacciones de las estructuras al recibir ciertos agentes externos o para el cálculo de la evolución ... -
Performance evaluation of solar-blind gas-filled sensors to detect electrical discharges for low-pressure aircraft applications
(Multidisciplinary Digital Publishing Institute (MDPI), 2022-01-10)
Article
Open AccessUnpressurized aircraft circuits facilitate the initiation of electrical discharges in wiring systems, with consequent damage to related insulation materials and safety hazards, that can and have already caused severe ... -
Sigma-delta effects and charge locking in capacitive MEMS under dielectric charge control
(2016-05)
Article
Open AccessThis work investigates, analytically and experimentally, the effects induced by the use of a first-order sigma-delta (S¿) feedback loop as a control method of dielectric charging for capacitive microelectromechanical systems ... -
Simplification and cost reduction of visual corona tests
(2018-02-27)
Article
Open Access -
Simulación de la formación de plasma en el mecanizado por electroerosión
(Academia Journals, 2017)
Conference report
Open AccessEl proceso de mecanizado por electroerosión es una técnica de manufactura no convencional caracterizada por descargas eléctricas controladas que liberan tal cantidad de energía que es capaz de transformar en plasma el ... -
The start of lightning: evidence of bidirectional lightning initiation
(Macmillan Publishers, 2015-10-18)
Article
Open AccessLightning flashes are known to initiate in regions of strong electric fields inside thunderstorms, between layers of positively and negatively charged precipitation particles. For that reason, lightning inception is ...
