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  • Assessment of Color Quality and Energy Efficiency: New Insights for Modem Lighting  Open access

     Quintero Quintero, Jesús María
    Universitat Politècnica de Catalunya
    Theses

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    Esta tesis se divide en dos partes: La primera trata con dos características principales de las fuentes de luz para la iluminación general: la calidad del color y de eficacia luminosa. El segundo se ocupa de los aspectos técnicos de la fotometría mesópica aplicada en el alumbrado público. La primera parte comienza proponiendo un procedimiento para generar un nuevo índice de rendimiento de color, que consiste en un índice visual tridimensional, llamado 3D-CRM. Con el fin de ilustrar el uso de este índice, se realizaron tres ejemplos de aplicación de iluminación: Arte, carnes y frutas. Los resultados muestran la bondad del índice visual 3D-CRM, que también se acompaña de un índice numérico que indica que tan bien una fuente de luz bajo prueba repolores la gama de colores para una aplicación de iluminación específica. Como complemento de la propuesta anterior, se realizó un análisis estadístico con el fin de definir los parámetros que componen la calidad de color de fuentes de luz. Este estudio estadístico se basa en una colección de más de 100 espectros reales e ideales de fuentes de luz. Como resultado, se encontró que hay otra variable que puede complementar el índice CRI para indicar la calidad del color. Este es el índice propuesto Oc (óptima del color), que se basa en el cálculo de los volúmenes generados con el espectro de la fuente de prueba y varios espectros ideal de reflectancia para obtener colores óptimos (colores de alta saturación) a diferentes niveles de luminancia. Esta primera parte termina proponiendo un índice para generar una clasificación de las fuentes de luz de acuerdo con los requisitos de la aplicación de iluminación y los parámetros tales como la temperatura de color correlacionada (CCT), la eficacia lumínica de radiación (LER) y la calidad de color (CQ ). Se demostró que el nuevo índice propuesto llamada ECQ (eficacia y calidad del color), es capaz de generar una clasificación útil en la evaluación de una colección de espectros, dando un CCT deseado y el peso que la eficacia y la calidad del color tienen en la aplicación de iluminación estudiado . Mediante el uso de algunos ejemplos de diferentes aplicaciones de iluminación (es decir, diferentes pesos para la calidad del color y la eficacia lumínica) se demostró la versatilidad y utilidad de este indicador. En la segunda parte de esta tesis, se hace una comparación de mediciones de laboratorio entre dos tipos diferentes de Goniofotómetros. El primero es uno estándar basada en el fotómetro, que utiliza el campo lejano para la medición. El segundo tiene una tecnología más reciente, utiliza una cámara CCD y fotómetro como sensores, así como el campo cercano para la medición. Este ejercicio de comparación valida las mediciones de la goniofotómetro de campo cercano, ya que hasta el momento, para este tipo de medición y el tipo de sensor (cámara CCD), no hay laboratorios con trazabilidad internacional que puede verificar o calibrar este sistema de medición. El ejercicio de comparación muestra que hay un muy buen ajuste entre las dos medidas realizadas a las bombillas estándar; Por lo tanto, los resultados del Goniofotómetro de campo cercano se validan. En recientes medidas realizadas en el laboratorio de luz e iluminación de K.U. Lovaina en Gante, se encontró que Goniofotómetro de campo cercano tiene un rango dinámico limitado para medición de intensidad luminosa, por esta razón existe un error de medición de bajas intensidades luminosas en una luminaria con una distribución aguda como por ejemplo un proyector de luz. Posteriormente se analizan, algunos aspectos del sistema recomendado para fotometría mesópica basado en el rendimiento visual, CIE191: 2010. Por último se presenta una propuesta de una nueva métrica llamada Índice de Consumo de Energía (Qsa) destinado a evaluar los posibles ahorros de energía en los sistemas de alumbrado público.

    Cotutela Universitat Politècnica de Catalunya i Institut de Recerca en Energia de Catalunya. La consulta íntegra de la tesi, inclosos els articles no comunicats públicament per drets d'autor, es pot realitzar, prèvia petició, a l'Arxiu de la UPC

    This dissertation is divided in two parts: The first one deal with two main characteristics of the light sources for general lighting: Color quality and luminous efficacy. The second one deals with technical aspects of the mesopic photometry applied in street lighting. The first part begins by proposing a method to generate a new color rendering index, consisting of a three-dimensional visual index, which was named 3D-CRM. In order to illustrate the use of this method and index, three examples of lighting application were performed: Artwork, meat and fruit. The results show the goodness of the visual index 3D-CRM, that is also accompanied by a numeric index that indicates how the light source tested fits with the gamut of colors required by the specific lighting application. Complementing the preceding proposal, a statistical analysis was performed in order to define the parameters that make up the color quality of light sources. This statistical study was based on a collection of more than 100 real and ideal spectra of light sources. As a result, it was found that there is another variable that can complement the CRI index to indicate the color quality. This is the proposed index Oc (Optimal Color), which is based on the calculation of volumes generated with the spectrum of test source and several ideal spectra of reflectance to get optimal colors (high saturated colors) at different luminance levels. This fisrt part of the dissertation ends by proposing an index to generate a classification of light sources according to the requirements of the lighting application and the parameters such as correlated color temperature (CCT), luminous efficacy of radiation (LER) and color quality (CQ). It was demonstrated that the new proposed index called ECQ (Efficacy and Color Quality), is able to generate a useful ranking when assessing a collection of spectra, by giving a desired CCT and the weight that efficacy and color quality have in the lighting application studied. By using some examples of different lighting applications (i.e. different weights for color quality and efficacy) it was demonstrated how versatile and useful the ECQ index is. In the second part of this dissertation, a comparison of laboratory measurements between two different types of goniophotometers is made. The first one is a standard and photometer-based one, which uses the far-field for measurement. The second one has a more recent technology, uses a CCD camera and photometer as sensors, as well as the near field for measurement. This comparison exercise validates the measurements from the near-field goniophotometer, since up to moment, for this type of measurement and type of sensor (CCD camera), there are no laboratories with international traceability that can verify or calibrate this measurement system. The comparison exercise shows that there is a very good fit between both measures performed to standard light bulbs; therefore results of the near-field goniophotometer are validated. In recent measures performed at the Light and lighting laboratory of K.U. Leuven in Ghent, it was found that near field goniophotometer has a reduced luminous intensity dynamic range, for this reason exists an error measuring low luminous intensities in a luminarie with a sharp LID such as PAR30 Spot light bulb. After that, some aspects of the Recommended System for Mesopic Photometry Based on Visual Performance, CIE191:2010 are analysed. Finally it is presented a proposal of a new metrics called Energy Consumption Index (Qsa) intended to assessing possible energy savings on street lighting systems. In this chapter, by using the Energy Consumption Index an evaluation of three different hypothetical scenarios for a typical city is performed to demonstrate how flexible and intuitive this index is. These scenarios assess different characteristics of the light system such as light sources types, dimming systems and also the use of photopic and mesopic photometry.

    Esta tesis se divide en dos partes: La primera trata con dos características principales de las fuentes de luz para la iluminación general: la calidad del color y de eficacia luminosa. El segundo se ocupa de los aspectos técnicos de la fotometría mesópica aplicada en el alumbrado público. La primera parte comienza proponiendo un procedimiento para generar un nuevo índice de rendimiento de color, que consiste en un índice visual tridimensional, llamado 3D-CRM. Con el fin de ilustrar el uso de este índice, se realizaron tres ejemplos de aplicación de iluminación: Arte, carnes y frutas. Los resultados muestran la bondad del índice visual 3D-CRM, que también se acompaña de un índice numérico que indica que tan bien una fuente de luz bajo prueba repolores la gama de colores para una aplicación de iluminación específica. Como complemento de la propuesta anterior, se realizó un análisis estadístico con el fin de definir los parámetros que componen la calidad de color de fuentes de luz. Este estudio estadístico se basa en una colección de más de 100 espectros reales e ideales de fuentes de luz. Como resultado, se encontró que hay otra variable que puede complementar el índice CRI para indicar la calidad del color. Este es el índice propuesto Oc (óptima del color), que se basa en el cálculo de los volúmenes generados con el espectro de la fuente de prueba y varios espectros ideal de reflectancia para obtener colores óptimos (colores de alta saturación) a diferentes niveles de luminancia. Esta primera parte termina proponiendo un índice para generar una clasificación de las fuentes de luz de acuerdo con los requisitos de la aplicación de iluminación y los parámetros tales como la temperatura de color correlacionada (CCT), la eficacia lumínica de radiación (LER) y la calidad de color (CQ ). Se demostró que el nuevo índice propuesto llamada ECQ (eficacia y calidad del color), es capaz de generar una clasificación útil en la evaluación de una colección de espectros, dando un CCT deseado y el peso que la eficacia y la calidad del color tienen en la aplicación de iluminación estudiado . Mediante el uso de algunos ejemplos de diferentes aplicaciones de iluminación (es decir, diferentes pesos para la calidad del color y la eficacia lumínica) se demostró la versatilidad y utilidad de este indicador. En la segunda parte de esta tesis, se hace una comparación de mediciones de laboratorio entre dos tipos diferentes de Goniofotómetros. El primero es uno estándar basada en el fotómetro, que utiliza el campo lejano para la medición. El segundo tiene una tecnología más reciente, utiliza una cámara CCD y fotómetro como sensores, así como el campo cercano para la medición. Este ejercicio de comparación valida las mediciones de la goniofotómetro de campo cercano, ya que hasta el momento, para este tipo de medición y el tipo de sensor (cámara CCD), no hay laboratorios con trazabilidad internacional que puede verificar o calibrar este sistema de medición. El ejercicio de comparación muestra que hay un muy buen ajuste entre las dos medidas realizadas a las bombillas estándar; Por lo tanto, los resultados del Goniofotómetro de campo cercano se validan. En recientes medidas realizadas en el laboratorio de luz e iluminación de K.U. Lovaina en Gante, se encontró que Goniofotómetro de campo cercano tiene un rango dinámico limitado para medición de intensidad luminosa, por esta razón existe un error de medición de bajas intensidades luminosas en una luminaria con una distribución aguda como por ejemplo un proyector de luz. Posteriormente se analizan, algunos aspectos del sistema recomendado para fotometría mesópica basado en el rendimiento visual, CIE191: 2010. Por último se presenta una propuesta de una nueva métrica llamada Índice de Consumo de Energía (Qsa) destinado a evaluar los posibles ahorros de energía en los sistemas de alumbrado público

  • El almacenamiento energético en baterías

     Rodriguez Bernuz, Joan Marc; Sumper, Andreas; Sudria Andreu, Antoni
    Automática e instrumentación
    num. 468, p. 32-27
    Date of publication: 2014-12
    Journal article

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    La estructura del sistema eléctrico debe cambiar, de forma que la energía pueda ser guardada cuando haya disponibilidad y consumida cuando haya demanda. La capacidad de obtener un sistema que pueda ser gobernado bajo estas reglas está cada vez más cerca gracias a la evolución de las baterías. La posibilidad de almacenar energía eléctrica en cantidades aceptables está también incidiendo en el cambio de otros hábitos de consumo, como la implantación del vehículo eléctrico, posibilitando un uso más limpio y eficiente de la energía.

  • Disseny mecatrònic d'una smart wheelchair

     Sudria Andreu, Antoni
    Competitive project

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  • Control del sistema de propulsió d'una motocicleta elèctrica

     Sudria Andreu, Antoni
    Competitive project

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  • The CDMtek-DS - an educational platform for entering into the microcontrollers world

     Armero Almazan, Pablo; Galceran Arellano, Samuel; Bergas Jane, Joan Gabriel; Sumper, Andreas; Gomis Bellmunt, Oriol; Sudria Andreu, Antoni
    International Congress on Education, Innovation and Learning Technologies
    p. 1-3
    Presentation's date: 2014-07-24
    Presentation of work at congresses

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    The module CDMtek-DS is a standalone module with which the student can learn how to program a microcontroller or a digital signal processor and interact with the peripherals included in the module. It also includes a CAN transceiver to get into the industrial communications world. This module is intended to be used with the CDMtek-PM to build a complete platform for motion control.

  • Centre d'innovació tecnològica en convertidors estàtics i accionaments

     Bergas Jane, Joan Gabriel; Galceran Arellano, Samuel; Rull Duran, Joan; Gomis Bellmunt, Oriol; Montesinos Miracle, Daniel; Villafafila Robles, Roberto; Sumper, Andreas; Boix Aragonès, Oriol; Egea Alvarez, Agusti; Heredero Peris, Daniel; Prieto Araujo, Eduardo; Girbau Llistuella, Francesc; Puente Torruella, Angel; Gross, Gabriel Igor; Muñoz Gazquez, Jose Pedro; Pages Gimenez, Marc; Chillon Anton, Cristian; Miguel Espinar, Carlos; Aragüés Peñalba, Monica; Giral Guardia, Jordi; Olivella Rosell, Pol; Bullich Massague, Eduard; Fonseca Dalmau, Josep; Camos Vidal, Robert; Duran Reus, Francesc Xavier; Lloret Gallego, Pau; Quirós Jacobo, Francisco Javier; Sudria Andreu, Antoni
    Competitive project

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  • Distribution system reconfiguration using genetic algorithm based on connected graphs

     Tomoiaga, Bodgan; Chindris, Mircea; Sumper, Andreas; Villafafila Robles, Roberto; Sudria Andreu, Antoni
    Electric power systems research
    Vol. 104, p. 216-225
    DOI: 10.1016/j.epsr.2013.06.021
    Date of publication: 2013-11
    Journal article

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    The reconfiguration of a power distribution system, by exchanging the functional links between its elements, represents one of the most important procedures to improve the performance in the operation of a distribution system. The optimization through reconfiguration (or optimal reconfiguration) of a power distribution system is not a new problem but still represents a difficult one and is specified in some strategies for smart grids. The paper addresses this problem as a single objective one, where, as main criterion, active power losses have been chosen. There is no unique acceptance regarding which approach (based on heuristics, meta-heuristics, genetic algorithms, etc.) is the most proper to use in order to solve this problem. The most important thing is how the specific knowledge of the problem domain is used and modeled in the implementation. Moreover, the indices which can quantify the quality of a reconfiguration method consist in runtime and the obtained solution and these indices can be confirmed only by experimental results. In order to solve the problem (to search and find the optimal solution) an original genetic algorithm based on connected graphs is proposed. Comparative tests performed on some test systems demonstrated the accuracy and the promptness of the proposed algorithm. AbbreviationsPactive power lossesVinodes voltagesI ijelectric current through a branch ijijbinary variable representing the status of a tie line (0 - open, 1 - closed)nthe number of electric system nodespthe number of connected componentsXthe set of power system nodesEthe set of power system lines (branches).

  • Biomass gasification for off-grid electrification of South-Saharan Africa

     Depoorter Ruelle, Víctor; Olivella Rosell, Pol; Giral Guardia, Jordi; Lladó Jaume, Àngel; Sudria Andreu, Antoni; Villafafila Robles, Roberto
    Congreso Iberoamericano sobre Microrredes con Generación Distribuida de Renovables
    p. 1-10
    Presentation's date: 2013-09-24
    Presentation of work at congresses

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    The NGO Misión y Desarrollo para Goundi, with the collaboration of the technology transfer centre CITCEA-UPC and the support of the CCD-UPC, is carrying out since 2011 the project Pôle Goundi aiming to electrify Goundi, a village located in the South of Chad. In this sense, the construction of a small-scale power plant which will use local resources to generate electricity is planned. Although the plant is expected to use photovoltaic and thermal solar energies also, biomass gasification has also been prioritized due to the social and economical advantages of spurring agricultural activity in Goundi. Since the installation of the power plant will be done by stages, the first stage of the project has to demonstrate its viability by installing and operating the first 20kW of electrical power. For this, a complete commercial solution which is able to gasify woody biomass has been selected. Currently, the system is being tested before its shipment to Chad and a model which simulates its behaviour has been developed.

  • Microgrids and emulation of distribution energy resources

     Cheah Mañé, Marc; Prieto Araujo, Eduardo; Villafafila Robles, Roberto; Sudria Andreu, Antoni; Gomis Bellmunt, Oriol
    Congreso Iberoamericano sobre Microrredes con Generación Distribuida de Renovables
    p. 1-10
    Presentation's date: 2013-09-23
    Presentation of work at congresses

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    This paper presents the use of emulator devices to represent different elements of a microgrid system. In this sense, the emulation concept and its advantages are explained. Each emulator is implemented by means of power converters which receive a determined power reference according to the energy resource that it means. Therefore, connecting a determined number of these emulators into the same system it is possible to create several microgrid configurations, which will be capable of performing different test and obtaining the same result that in a real system. In the end, as an example of the advantages that the emulators are able to offer, an experimental platform is presented.

  • Assessment of impact of charging infrastructure for electric vehicles on distribution networks

     Villafafila Robles, Roberto; Girbau-Llistuella, F.; Olivella Rosell, Pol; Sudria Andreu, Antoni; Bergas Jane, Joan Gabriel
    European Conference on Power Electronics and Applications
    DOI: 10.1109/EPE.2013.6634671
    Presentation's date: 2013-09-05
    Presentation of work at congresses

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  • Energy market regulations for electric vehicle encourage. Study of current frames

     Felisart Serlavos, Bernat; Villafafila Robles, Roberto; Olivella Rosell, Pol; Ramirez Pisco, Rodrigo; Sudria Andreu, Antoni
    Spanish Portuguese Conference on Electrical Engineering
    p. 1-6
    Presentation's date: 2013-07
    Presentation of work at congresses

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  • El ecosistema del vehículo eléctrico

     Villafafila Robles, Roberto; Olivella Rosell, Pol; Heredero Peris, Daniel; Sudria Andreu, Antoni
    Automática e instrumentación
    num. 452, p. 46-50
    Date of publication: 2013-06
    Journal article

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  • Study of optimization design criteria for stand-alone hybrid renewable power systems

     Martínez Díaz, Maria del Mar; Villafafila Robles, Roberto; Montesinos Miracle, Daniel; Sudria Andreu, Antoni
    International Conference on Renewable Energies and Power Quality
    p. 1-2
    Presentation's date: 2013-03-21
    Presentation of work at congresses

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  • Access to the full text
    Pareto optimal reconfiguration of power distribution systems using a genetic algorithm based on NSGA-II  Open access

     Tomoiaga, Bogdan; Chindris, Mircea; Sumper, Andreas; Sudria Andreu, Antoni; Villafafila Robles, Roberto
    Energies
    Vol. 6, num. 3, p. 1439-1455
    DOI: 10.3390/en6031439
    Date of publication: 2013-03-06
    Journal article

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    Reconfiguration, by exchanging the functional links between the elements of the system, represents one of the most important measures which can improve the operational performance of a distribution system. The authors propose an original method, aiming at achieving such optimization through the reconfiguration of distribution systems taking into account various criteria in a flexible and robust approach. The novelty of the method consists in: the criteria for optimization are evaluated on active power distribution systems (containing distributed generators connected directly to the main distribution system and microgrids operated in grid-connected mode); the original formulation (Pareto optimality) of the optimization problem and an original genetic algorithm (based on NSGA-II) to solve the problem in a non-prohibitive execution time. The comparative tests performed on test systems have demonstrated the accuracy and promptness of the proposed algorithm.

  • El auge de los recursos energéticos distribuidos

     Villafafila Robles, Roberto; Olivella Rosell, Pol; Sudria Andreu, Antoni
    Automática e instrumentación
    num. 447, p. 34-36
    Date of publication: 2013-01
    Journal article

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  • Sistemas de transporte eléctrico para grandes centrales eólicas marinas

     Sudria Andreu, Antoni; Gomis Bellmunt, Oriol
    Competitive project

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  • Q-00203

     Sudria Andreu, Antoni
    Competitive project

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  • Toward a new model of sustainable urban lighting

     Sánchez Balvás, Lizeth Artemisa; Quintero, Jesus; Sudria Andreu, Antoni; Felipe Blanch, Jose Juan de; Carreras, Josep
    Congreso Iberoamericano de Iluminación
    p. 193-199
    Presentation's date: 2012-11-11
    Presentation of work at congresses

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  • Operation of a utility connected microgrid using an IEC 61850-based multi-level management system

     Ruiz Alvarez, Albert; Colet Subirachs, Alba; Alvarez Cuevas-Figuerola, Felipe; Gomis Bellmunt, Oriol; Sudria Andreu, Antoni
    IEEE Transactions on Smart Grid
    Vol. 3, num. 2, p. 858-865
    DOI: 10.1109/TSG.2012.2187222
    Date of publication: 2012-06-01
    Journal article

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  • LCL filter design for an NPC three-level three-phase grid connected inverter

     Benet Barberan, Jordi; Pages Gimenez, Marc; Galceran Arellano, Samuel; Sudria Andreu, Antoni; Montesinos Miracle, Daniel
    International Exhibition & Conference for Power Electronics Intelligent Motion Power Quality
    p. 1124-1127
    Presentation's date: 2012-05-08
    Presentation of work at congresses

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  • Lighting

     Chindris, Mircea; Sudria Andreu, Antoni
    Date of publication: 2012-04
    Book chapter

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  • Access to the full text
    Power system stabiliser capability of offshore wind power plants  Open access

     Domínguez García, José Luis; Gomis Bellmunt, Oriol; Bianchi, Fernando Daniel; Sumper, Andreas; Sudria Andreu, Antoni
    European Wind Energy Association’s (EWEA) Annual Conference
    p. 29-32
    Presentation's date: 2012-04
    Presentation of work at congresses

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    Nowadays, wind power generation is being located offshore because of its higher wind speed at lower height and larger installation zones in comparison with onshore technologies. Recently, the concept of wind power plant has been introduced as a result of the increment of wind power penetration in power systems. Transmission system operators are requiring wind power generation to help to power system with some ancillary services such as fault ride through or power system stabiliser capability. Therefore, it is important to study power system stabiliser capability of wind power plants. In this paper, a comparison of various power system stabiliser schemes is presented. The effect of the distance from the shore tie-line to the offshore wind farm on the controller response is also evaluated. These studies show that offshore wind power plants have promising power system stabiliser capability even using local input signals.

  • Centralized and distributed active and reactive power control of a utility connected microgrid using IEC61850

     Colet Subirachs, Alba; Ruiz Alvarez, Albert; Gomis Bellmunt, Oriol; Alvarez Cuevas-Figuerola, Felipe; Sudria Andreu, Antoni
    IEEE systems journal
    Vol. 6, num. 1, p. 58-67
    DOI: 10.1109/JSYST.2011.2162924
    Date of publication: 2012-03
    Journal article

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  • Color rendering map: A graphical metric for assessment of illumination

     Quintero, Jesus M.; Sudria Andreu, Antoni; Hunt, Charles E.; Carreras, J.
    Optics express
    Vol. 20, num. 5, p. 4939-4956
    DOI: 10.1364/OE.20.004939
    Date of publication: 2012-02-27
    Journal article

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    Autonomous photovoltaic lighting system  Open access

     Hafez, Ahmed A. A.; Montesinos Miracle, Daniel; Sudria Andreu, Antoni
    Journal of electrical engineering
    Vol. 12, num. 3, p. 216-226
    Date of publication: 2012
    Journal article

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    This paper introduces a comparison between the conventional and Photovoltaic (PV) lighting systems. A simple sizing procedure for a PV stand-alone system was advised. The paper also proposes a novel PV lighting system. The proposed system is simple, compact and reliable. The system operation was investigated by thoroughly mathematical and simulation work.

  • Dynamic model of an HTS cable for power grid simulation

     Del-Rosario Calaf, Gerard; Sumper, Andreas; Granados García, Xavier; Sudria Andreu, Antoni; Villafafila Robles, Roberto
    Physics Procedia
    Vol. 36, p. 1272-1278
    DOI: 10.1016/j.phpro.2012.06.289
    Date of publication: 2012
    Journal article

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  • Reactive power dispatch in wind farms using particle swarm optimization technique and feasible solutions search

     Martinez Rojas, Marcela; Sumper, Andreas; Gomis Bellmunt, Oriol; Sudria Andreu, Antoni
    Applied energy
    Vol. 88, num. 12, p. 4678-4686
    DOI: 10.1016/j.apenergy.2011.06.010
    Date of publication: 2011-12
    Journal article

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    In this paper, an optimization method for the reactive power dispatch in wind farms (WF) is presented. Particle swarm optimization (PSO), combined with a feasible solution search (FSSPSO) is applied in order to optimize the reactive power dispatch, taking into consideration the reactive power requirement at point of common coupling (PCC), while active power losses are minimized in a WF. The reactive power requirement at PCC is included as a restriction problem and is dealt with feasible solution search. Finally an individual set point, particular for each wind turbine (WT), is found. The algorithm is tested in a WF with 12 WTs, taking into consideration different control options and different active power output levels.

  • Autonomous cascaded PV system

     Hafez, Ahmed A. A.; Montesinos Miracle, Daniel; Sudria Andreu, Antoni
    Journal of engineering sciences
    Vol. 1, p. 243-250
    Date of publication: 2011-11-14
    Journal article

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    This paper proposes multi-level PV system; three PV generators each coupled to a buck cell. Each PV-generator-buckconverter channel is controlled such that maximum power is captured independently under different irradiation and temperature levels. The system operation under normal/abnormal conditions is investigated by thoroughly mathematical and simulation work.

  • Optimization Techniques to improve energy efficiency and to mitigate line overloads

     Pezzini, Paola
    Department of Electrical Engineering, Universitat Politècnica de Catalunya
    Theses

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  • Modeling and simulation of the fixed speed wind power generation system for grid studies

     Marzband, Mousa; Sumper, Andreas; Gomis Bellmunt, Oriol; Sudria Andreu, Antoni; Chindris, Mircea
    International Conference on Electrical Power Quality and Utilisation
    p. 1-6
    DOI: 10.1109/EPQU.2011.6128913
    Presentation's date: 2011-10-17
    Presentation of work at congresses

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  • Object oriented backward/forward algorithm for unbalanced and harmonic polluted distribution systems

     Tomoiaga, Bogdan; Chindris, Mircea; Sudria Andreu, Antoni; Sumper, Andreas
    International Conference on Electrical Power Quality and Utilisation
    p. 1-6
    DOI: 10.1109/EPQU.2011.6128909
    Presentation's date: 2011-10-17
    Presentation of work at congresses

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    The optimization in the operation of distribution electric systems has become an acute problem. In order to evaluate some essential criteria (e.g., active power losses) the computation of power flow is absolutely necessary. Taking into account the real operating conditions (unbalance, harmonics) it is of great interest for accurate steady state estimation. The existent solutions proposed in literature are complex and it is difficult to implement them in unbalanced and harmonic polluted systems. By the original adaptation of the backward/forward sweep algorithm, the authors propose a novel paradigm to analyze the propagation of asymmetries and harmonic distortions through radial electric networks.

  • Control for power conditioner based PEM fuel cell and back-up power system with supercapacitor

     Trujillo Caballero, Juan Carlos; Gomis Bellmunt, Oriol; Montesinos Miracle, Daniel; Sumper, Andreas; Sudria Andreu, Antoni; Junyent Ferré, Adrià
    International Conference on Electrical Power Quality and Utilisation
    p. 1-6
    DOI: 10.1109/EPQU.2011.6128959
    Presentation's date: 2011-10-17
    Presentation of work at congresses

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    This paper presents a new control strategy to operate a Proton Exchange Membrane Fuel Cell (PEMFC) 1,2 kW and supercapacitor (SC) through a hybrid converter proposed. The Fuel Cell (FC) has a slow dynamic device by its nature; therefore it is recommended to have an additional auxiliary power such as the SC to improve system performance in all its applications. So has been made a study of the DC/DC converters as well as control strategies employed recently used to operate the FC and SC system. This paper shows an experimental validation of the system which has been simulated in Matlab-Simulink. For this two test have been proposed using different load demands of power and cut off FC power. Under disturbances from FC voltage and load voltage these tests are possible to verify that the system achieves an excellent output voltage (Vo) regulation and SC Voltage (VSC) control.

  • Modeling and validation of DFIG 3-MW wind turbine using field test data of balanced and unbalanced voltage sags

     Trilla Romero, Lluís; Gomis Bellmunt, Oriol; Junyent Ferré, Adrià; Mata, Montserrat; Sánchez Navarro, Javier; Sudria Andreu, Antoni
    IEEE Transactions on Sustainable Energy
    Vol. 2, num. 4, p. 509-519
    DOI: 10.1109/TSTE.2011.2155685
    Date of publication: 2011-10
    Journal article

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  • Deterministic and probabilistic assessment of the impact of the electrical vehicles on the power grid

     Valsera Naranjo, Eduardo; Martinez Vicente, David; Sumper, Andreas; Villafafila Robles, Roberto; Sudria Andreu, Antoni
    IEEE Power & Energy Society General Meeting
    p. 1-8
    DOI: 10.1109/PES.2011.6039546
    Presentation's date: 2011-07
    Presentation of work at congresses

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  • A utility connected microgrid based on power emulators

     Gomis Bellmunt, Oriol; Sumper, Andreas; Colet Subirachs, Alba; Ruiz Alvarez, Albert; Alvarez Cuevas-Figuerola, Felipe; Sudria Andreu, Antoni
    IEEE Power & Energy Society General Meeting
    p. 1-6
    DOI: 10.1109/PES.2011.6039045
    Presentation's date: 2011-07
    Presentation of work at congresses

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  • Dynamic simulation of HTSC cables with a conventional simulation program

     Gelabert Serra, Miquel Jeroni; Granados García, Xavier; Sumper, Andreas; Sudria Andreu, Antoni; Rull Duran, Joan
    IEEE transactions on applied superconductivity
    Vol. 1, num. 3, p. 1025-1029
    DOI: 10.1109/TASC.2010.2089963
    Date of publication: 2011-06
    Journal article

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  • Demand side management and electric vehicle integration (VERDE)

     Cruz Zambrano, Miguel; Cairó, Ignasi; Santandreu Corretgé, Albert; Sumper, Andreas; Mora Marin, Maria Rosa; Sudria Andreu, Antoni
    International Conference on Electricity Distribution
    p. 1-4
    Presentation's date: 2011-06
    Presentation of work at congresses

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  • Assessment of the impact of existing high voltage lines in urban areas

     Sumper, Andreas; Villafafila Robles, Roberto; Boix Aragonès, Oriol; Bergas Jane, Joan Gabriel; Sudria Andreu, Antoni
    International Conference on Modern Power Systems
    p. 453-458
    Presentation's date: 2011-05-18
    Presentation of work at congresses

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  • Optimization techniques to improve energy efficiency in power systems

     Pezzini, Paola; Gomis Bellmunt, Oriol; Sudria Andreu, Antoni
    Renewable and sustainable energy reviews
    Vol. 15, num. 4, p. 2028-2041
    DOI: Article - selected Figures/Tables (18) References (81) Renewable and Sustainable Energy Reviews Volume 15, Issue 4, May 2011, Pages 2028-2041 doi:10.1016/j.rser.2011.01.009
    Date of publication: 2011-05
    Journal article

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  • XIX Convocatòria d'Ajuts per a Accions de Cooperació. Estudi de la tecnologia elèctrica i mecànica d'aerogeneradors de baixa potència per electrificació rural.

     Gomis Bellmunt, Oriol; Martín Segura, Guillermo; Agüera Arroyo, Francesc; Montesinos Miracle, Daniel; Sudria Andreu, Antoni; Clos Costa, Daniel; Puig Ortiz, Joan; Ferrer Marti, Laia; Fonseca Dalmau, Josep; Camos Vidal, Robert
    Competitive project

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  • Design, analysis and control of synchrotron power supplies

     Bhasker Manthati, Udaya
    Department of Electrical Engineering, Universitat Politècnica de Catalunya
    Theses

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