Browsing by Subject "Electric power systems -- Control"
Now showing items 1-20 of 20
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Avoiding overvoltage problems in three-phase distributed-generation systems during unbalanced voltage sags
(2020-02-01)
Article
Open AccessDuring voltage sags, distributed generation systems must fulfil specific grid-code requirements for reactive current injection. This ancillary service can produce overvoltage problems in networks operating in unbalanced ... -
Description of gasket failure in a 7 cell PEMFC stack
(Elsevier S.A., 2007)
Article
Open AccessThis article presents the data and the description of a fuel cell stack that failed due to gasket degradation. The fuel cell under study is a 7 cell stack. The unexpected change in several variables such as temperature, ... -
Diseño de un convertidor CC-CC doble boost acoplado
(2012)
Conference report
Open AccessEl convertidor de CC a CC doble boost acoplado (C2B) es de interés en aplicaciones emergentes que demandan alto rendimiento y alta relación de conversión, evitando valores extremos del ciclo de trabajo de la llave. El C2B ... -
Diseño e implementación de un control supervisor para sistemas híbridos de generación basado en pilas de combustible
(2012)
Conference report
Open AccessEn el presente artículo se muestra el desarrollo, implementación y resultados experimentales de un control supervisor para un sistema híbrido de generación de energía eléctrica basado en una pila de combustible tipo PEM. ... -
Disseny d'una comunitat energètica i el sistema de monitorització i control per a un Polígon d'Activitat Econòmica
(Universitat Politècnica de Catalunya, 2023-07-14)
Bachelor thesis
Open AccessAquest projecte consisteix en el disseny d'una comunitat energètica i el sistema de monitoratge i control per a un Polígon d'Activitat Econòmica. Una comunitat energètica és una agrupació d'entitats (ciutadans, administracions ... -
Disseny i implementaci o d'una plataforma experimental per al desenvolupament de simulacions Power Hardware in the Loop
(Universitat Politècnica de Catalunya, 2015-04)
Master thesis (pre-Bologna period)
Open AccessEn aquest projecte es presenta el disseny, la implementació i la validació d’una plataforma experimental per al desenvolupament de simulacions utilitzant la tècnica PHIL (Power Hardware in the Loop). Una ... -
Electrode structure effects on the performance of open-cathode proton exchange membrane fuel cells: A multiscale modeling approach
(2014-06-15)
Article
Restricted access - publisher's policyIn this paper we present a new dynamic multiscale model of an open-cathode Polymer Electrolyte Membrane Fuel Cell (PEMFC). The model describes two-phase water transport, electrochemistry and thermal management within a ... -
Enhanced DC-Link Capacitor Voltage Balancing Control of DC-AC Multilevel Multileg Converters
(Institute of Electrical and Electronics Engineers (IEEE), 2015-05-01)
Article
Restricted access - publisher's policyThis paper presents a capacitor voltage balancing control applicable to any multilevel dc-ac converter formed by a single set of series-connected capacitors implementing the dc link and semiconductor devices, such as the ... -
Experimental methodology for modeling water diffusion transport in a PEMFC stack with respect to membrane temperature and resistance
(Elsevier, 2008)
Conference report
Open AccessThis work proposes an experimental methodology for modeling water diffusion transport in a PEMFC, which is applied to a commercially available fuel cell stack. The effective water vapor diffusion coefficient and its dynamical ... -
Experimental study of hydrogen purge effects on performance and efficiency of an open-cathode proton exchange membrane fuel cell system
(2013)
Article
Open AccessThe performance and efficiency of an open-cathode PEM fuel cell system in dead-ended anode (DEA) configuration and hydrogen purges is analyzed in this work. Excess water and crossed-over nitrogen in the anode decrease the ... -
Linear identification and model adjustment of a PEM fuel cell stack
(Elsevier, 2008)
Article
Open AccessIn the context of fuel cell stack control a mayor challenge is modeling the interdependence of various complex subsystem dynamics. In many cases, the states interaction is usually modeled through several look-up tables, ... -
Modelado dinámico y validación experimental de una pila de combustible PEM
(2008)
Conference report
Open AccessResumen: En el presente trabajo se desarrolla un modelo dinámico apto para el diseño de control de un sistema de celdas de combustible experimental tipo PEM (Polymer Electrolyte Membrane). El sistema bajo análisis está ... -
Network model of short-term optimal hydrothermal power flow with security constraints
(IEEE Press. Institute of Electrical and Electronics Engineers, 1995)
Conference report
Open AccessOptimizing the thermal production of electricity in the short term in an integrated system when a thermal unit commitment has been decided means coordinationg hydro and thermal generation costs over the time period under ... -
Numerical Model for Polymer Electrolyte Membrane Fuel Cells with Experimental Application and Validation
(2009)
Article
Open AccessThe aim of this paper is to present a simple 3D computational model of a Polymer Electrolyte Membrane Fuel Cell (PEMFC) that simulates over time the heat distribution, energy and mass balance of the reactant gas flows in ... -
Performance improvement by temperature control of an open-cathode PEM fuel cell system
(2014-06-01)
Article
Restricted access - publisher's policyThe work presented in this article combines experimental analysis and theoretical studies of temperature effects on the performance of an open-cathode, self-humidified PEM fuel cell system for the design of optimal control ... -
Power Harware in the Loop Laboratory Setup
(Universitat Politècnica de Catalunya, 2013-07)
Master thesis
Open AccessShare of distributed generation in grid system is increasing in time. In conventional generation, rotating mass provides inertia to the grid. Distribution generation causes reduction in inertia of grid system and this ... -
Propulsión del Segway RMP 200 mediante pilas de combustible tipo PEM
(2011)
Conference report
Open AccessUtilizando las últimas innovaciones en las tecno-logias de pilas de combustible y en el de almace-namiento de hidrogeno disponibles en el mercado, en este trabajo se pretende equiparar las presta-ciones de un prototipo a ... -
Reserch on the voltage unbalance caused by the increase in penetreation of photovoltaic systems in electrical energy distribution feeders
(Universitat Politècnica de Catalunya / Universidade Estadual de Campinas, 2013)
Bachelor thesis
Open Access
Covenantee: Universidade Estadual de CampinasDue to environmental concerns related to climate change, fiscal incentives from governments around the world, and falling prices of proved and ever-improving technology, the use of renewable energy sources has been rising ... -
Review of anti-windup strategies for PI speed controllers in field oriented control of permanent magnet synchronous machines
(2010-10)
Article
Restricted access - publisher's policyThe work presented in this paper addresses the unwanted windup phenomenon reviewing and comparing different PI anti-windup strategies employed in speed control of electric drives. The tuning process of PI controllers is ... -
Test de interrupción de la humidificación para la diagnosis en pilas PEM
(APPICE, 2008)
Conference report
Open AccessOne of the most demanding research topics related to the Polymer Electrolyte Membrane Fuel Cell concerns its reliability. Apart from the security aspects, it is basic to have a diagnosis of the internal state of the fuel ...
