Graphic summary
  • Show / hide key
  • Information


Scientific and technological production
  •  

1 to 50 of 132 results
  • Aplicaciones de la corriente continua de media tensión en sistemas eléctricos

     Pedra Duran, Joaquin; Cunill Sola, Jordi; Mesas García, Juan José; Monjo Mur, Lluis; Sainz Sapera, Luis
    Competitive project

     Share

  • Electrotecnia. Problemas de examen resueltos

     Pedra Duran, Joaquin; Corcoles Lopez, Felipe; Sainz Sapera, Luis
    Date of publication: 2013-09
    Book

     Share Reference managers Reference managers Open in new window

  • Review of magnetic ballast discharge lamp models

     Molina, Julio; Mesas García, Juan José; Sainz Sapera, Luis
    IASTED European Conference on Power and Energy Systems
    p. 178-184
    Presentation's date: 2011-06-22
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Experimental measurements of fluorescent lamp harmonic current emissions and their impact on neutral current

     Cunill Sola, Jordi; Mesas García, Juan José; Sainz Sapera, Luis
    IASTED European Conference on Power and Energy Systems
    p. 185-192
    Presentation's date: 2011-06-22
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • On the square arc voltage waveform model in magnetic discharge lamp studies

     Molina, Julio; Sainz Sapera, Luis; Mesas García, Juan José
    International Conference on Power Engineering, Energy and Electrical Drives
    p. 1-5
    Presentation's date: 2011-05-11
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The current number of magnetic and electronic ballast discharge lamps in power distribution systems is increasing because they perform better than incandescent lamps. This paper studies the magnetic discharge lamp modeling. In particular, the arc voltage waveform is analyzed and the limitations of the square waveform model are revealed from experimental measurements.

  • Low-watt compact fluorescent lamps with electronic ballasts

     Cunill Sola, Jordi; Mesas García, Juan José; Sainz Sapera, Luis
    International Conference on Power Engineering, Energy and Electrical Drives
    p. 1-5
    Presentation's date: 2011-05-11
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Access to the full text
    Experimental measurements about harmonic current mitigation of electric vehicle battery chargers  Open access

     Sainz Sapera, Luis; Balcells Sendra, Josep
    International Conference on Renewable Energies and Power Quality
    p. 1-6
    Presentation's date: 2011-04-13
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    The expected high penetration of battery chargers for electric vehicles (EV) in electric networks is foreseen as a potential problem for power quality. Battery chargers are nonlinear devices that inject harmonic currents and pollute network voltages. Thus, their harmonic emissions must be analyzed and reduced by harmonic mitigation techniques to avoid future problems. This paper analyzes and reports some real case measurements of harmonics injected by single- and three-phase battery chargers and their attenuation using line choke inductances.

  • Currents' physical components (CPC) concept in wind farm harmonic current studies

     Sainz Sapera, Luis; Cunill Sola, Jordi
    International Conference on Renewable Energies and Power Quality
    p. 1-6
    Presentation's date: 2011-04-13
    Presentation of work at congresses

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Access to the full text
    On electric vehicle battery charger modeling  Open access

     Sainz Sapera, Luis; Mesas García, Juan José; Balcells Sendra, Josep
    EA4EPQ International Conference on Renewable Energies and Power Quality
    p. 1-5
    Presentation's date: 2011-04-13
    Presentation of work at congresses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    The increase of electric vehicle (EV) battery chargers connected to electric networks could lead to future harmonic problems in power systems. These loads are nonlinear devices that inject harmonic currents and pollute network voltages. Thus, battery charger modeling must be studied in detail to determine their harmonic emissions and prevent future problems. This paper investigates EV battery charger behavior, analyzes its equivalent circuit and reports a model for each conduction mode of the circuit. Experimental measurements and PSpice numerical simulations support the study.

  • Caracterización experimental y análisis estadístico de conjuntos de dispositivos no lineales en instalaciones eléctricas

     Martin Cañadas, Maria Elena; Mesas García, Juan José; Cunill Sola, Jordi; Clua Ruiz, Jordi; Sainz Sapera, Luis
    Competitive project

     Share

  • Estudio y caracterización de cargas no lineales  Open access  awarded activity

     Mesas García, Juan José
    Department of Electrical Engineering, Universitat Politècnica de Catalunya
    Theses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    As a continuation of the work done by the QSE (Electrical Supply Quality) research group at the UPC (Polytechnic University of Catalonia) on non-linear load modelling to determine harmonic distortion in electrical power systems, this thesis consists of the carrying out of a series of studies of the most usual non-linear loads in the said systems (single-phase and three-phase rectifiers with capacitive filter, three-phase 6-pulse rectifiers and discharge lamps), basically aiming to characterize their behaviour and assess their influence on electrical power systems. The thesis was prepared in cooperation with the GNOM (Group of Numerical Optimization and Modelling) research group at the UPC in order to be able to analyse the numerical problem raised by the system of non-linear equations which characterizes each of the non-linear loads, as well as being able to approach optimization issues with some certainty of success. In summary, the aims of this thesis are as follows: -To analyse modelling of the most usual four non-linear loads in electrical power systems in order to incorporate the invariant concept in a justified way and establish ranges of values for the said invariants depending on their usual operating conditions. -To exploit the possibilities offered by invariants and, on the basis of the ranges of values obtained for each of them, to proceed to characterize the deterministic behaviour of the non-linear loads which are the object of the study and also to analyse the phenomena of harmonic cancellation and interaction. -To describe and study experimentally, also on the basis of invariants, the fundamental and harmonic currents (magnitude and angle) consumed by the non-linear loads considered in this thesis, whether by obtaining experimental models (databases) validated both experimentally and numerically, by validating the studied analytical models experimentally or by fitting the parameters of any of the previous models (parameter estimation) on the basis of experimental acquisitions. -To study the neutral conductor current in three-phase systems to which single-phase non-linear loads are connected (in particular, single-phase rectifiers with capacitive filter), by using invariants and validating the results of this experimentally.

    Como continuación de los trabajos realizados por el grupo de investigación QSE (Calidad del Suministro Eléctrico) de la UPC (Universidad Politécnica de Cataluña) sobre modelización de cargas no lineales para la determinación de la distorsión armónica en los sistemas eléctricos de potencia, se ha realizado como tesis una serie de estudios sobre las cargas no lineales más habituales en dichos sistemas (rectificadores monofásicos y trifásicos con filtro capacitivo, rectificadores trifásicos de 6 pulsos y lámparas de descarga) encaminados básicamente a la caracterización de su comportamiento y al análisis de su influencia en los sistemas eléctricos de potencia. La tesis se ha desarrollado en colaboración con el grupo de investigación GNOM (Grupo de Optimización Numérica y Modelización) de la UPC para poder analizar el problema numérico planteado por el sistema de ecuaciones no lineales que caracteriza cada una de las cargas no lineales, así como poder abordar con garantías problemas de optimización. Resumidamente, los objetivos de esta tesis son: -Analizar la modelización de las cuatro cargas no lineales más habituales en los sistemas eléctricos de potencia con el objetivo de introducir de forma justificada el concepto de invariante y establecer rangos de valores para dichos invariantes de acuerdo a sus condiciones habituales de funcionamiento. -Aprovechar las posibilidades que ofrecen los invariantes y, a partir de los rangos de valores obtenidos para cada uno de ellos, proceder a caracterizar el comportamiento determinístico de las cargas no lineales objeto de estudio y también a analizar los fenómenos de la cancelación y la interacción armónica. -Caracterizar y estudiar experimentalmente, también a partir de los invariantes, las intensidades fundamental y armónicas (módulo y ángulo) que consumen las cargas no lineales consideradas en esta tesis, ya sea mediante la obtención de modelos experimentales (bases de datos) validados tanto experimental como numéricamente, la validación experimental de los modelos analíticos estudiados o bien el ajuste de los parámetros de cualquiera de los anteriores modelos (estimación de parámetros) a partir de adquisiciones experimentales. -Estudiar la intensidad del neutro en sistemas trifásicos en los que hay conectadas cargas no lineales monofásicas (en particular, rectificadores monofásicos con filtro capacitivo), utilizando los invariantes y validando experimentalmente los resultados que se obtengan.

  • Estudio del circuito simetrizador Steinmetz en sistemas con polución armónica  Open access

     Caro Huertas, Manuel
    Department of Electrical Engineering, Universitat Politècnica de Catalunya
    Theses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    The main bulk of electric power systems use a three¿phase configuration with an alternating current flow. Pursuing the optimal performance of these networks and avoiding possible technical problems, it is preferred balanced operating conditions, i.e., the currents of all phases have the same magnitude and form a direct sequence with a phase of 120º. However, if several single¿phase loads (such as high speed traction systems) are present in these systems, the operating condition turns unbalanced, provoking an asymmetric voltage supply. This undesirable working condition can be avoided by the use of two reactances connected with the single-phase load using a triangle configuration, in such a way that the total current consumption turns out to be balanced. This approach is commonly known as Steinmetz circuit or symmetrizing circuit. Due to the reactances of the symmetrizing circuit, the connection of the circuit in an electric network changes the system frequency response, appearing new resonances of several types and presenting impedance values too small or too large. Moreover, the quantity of nonlinear loads (i.e., loads with consume nonsinusoidal currents, such as arc furnaces, power electronics devices like high-speed rail systems...) is increasing nowadays. The harmonic current injection by these charges may interact with the resonances caused by the Steinmetz circuit, resulting in a large harmonic distortion in voltage. The aim of this doctoral thesis is to analyze the presence of several types of resonances in order to avoid this problem. It is used a simplified scheme of a network in which the single¿phase load and the symmetrized circuit are connected. This system also encloses nonlinear loads that generate harmonic currents. This set is analyzed from the viewpoint of nonlinear loads and of the network for parallel and series resonance frequencies location, respectively. By obtaining these resonant frequencies and knowing the harmonic injection of nonlinear loads, the trouble of voltage supply distortion can be anticipated and avoided.

  • Tecnología eléctrica. 2a. edición

     Boix Aragonès, Oriol; Sainz Sapera, Luis; Corcoles Lopez, Felipe; Suelves Joanxich, Francisco Jose
    Date of publication: 2009-09-14
    Book

     Share Reference managers Reference managers Open in new window

  • Reconeixement Grup de Recerca Consolidat AGAUR 2009-2013

     Mesas García, Juan José; Sainz Sapera, Luis; Pedra Duran, Joaquin; Corcoles Lopez, Felipe; Salichs Vivancos, Miguel; Bargalló Perpiñà, Ramon; Martin Cañadas, Maria Elena; Cunill Sola, Jordi
    Award or recognition

     Share

  • Deterministic and experimental study on three-phase 6-pulse rectifiers

     Mesas García, Juan José; Sainz Sapera, Luis; Ferrer Biosca, Alberto
    IASTED International Conference on Power and Energy Systems
    p. 62-66
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Deterministic and stochastic study of the three-phase non-linear load behavior

     Mesas García, Juan José; Sainz Sapera, Luis; Ferrer Biosca, Alberto
    IEEE International Conference on Power Engineering, Energy and Electrical Drives
    p. 297-302
    DOI: 10.1109/POWERENG.2009.4915167
    Presentation's date: 2009
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The paper examines the deterministic and stochastic behavior of three-phase uncontrolled rectifiers and three-phase 6-pulse rectifiers from extensive simulations performed by a MATLAB customized program. The study is based on non-linear load invariants and analyzes the harmonic current magnitudes and phase angles of these loads. Invariants are the minimum number of parameters characterizing non-linear loads univocally. Two practical laboratory examples are presented to illustrate the numerical study.

  • Discharge lamp harmonic interaction study by Monte Carlo simulation and experimental measurements

     Mesas García, Juan José; Sainz Sapera, Luis; Ferrer Biosca, Alberto
    IEEE International Conference on Power Engineering, Energy and Electrical Drives
    p. 303-308
    DOI: 10.1109/POWERENG.2009.4915168
    Presentation's date: 2009
    Presentation of work at congresses

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The growing presence of discharge lamps in power distribution systems has increased the harmonic distortion in these systems. The paper studies the magnetic ballast discharge lamp modelization with and without harmonic interaction. The supply harmonic voltage influence on lamp behavior is analyzed by Monte Carlo simulation. The results are validated with experimental measurements.

  • Estimation of single-phase uncontrolled recitifier parameters

     Mesas García, Juan José; Sainz Sapera, Luis; Ferrer Biosca, Alberto
    IASTED International Conference on Power and Energy Systems
    p. 57-61
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Deterministic and stochastic study of the three-phase non-linear load behavior

     Ferrer Biosca, Alberto; Mesas García, Juan José; Sainz Sapera, Luis
    DOI: 10.1109/POWERENG.2009.4915167
    Date of publication: 2009
    Book chapter

    Read the abstract Read the abstract View View Open in new window  Share Reference managers Reference managers Open in new window

    The paper examines the deterministic and stochastic behavior of three-phase uncontrolled rectifiers and three-phase 6-pulse rectifiers from extensive simulations performed by a MATLAB customized program. The study is based on non-linear load invariants and analyzes the harmonic current magnitudes and phase angles of these loads. Invariants are the minimum number of parameters characterizing non-linear loads univocally. Two practical laboratory examples are presented to illustrate the numerical study.

  • Discharge lamp harmonic interaction study by Monte Carlo simulation and experimental measurements

     Ferrer Biosca, Alberto; Mesas García, Juan José; Sainz Sapera, Luis
    DOI: 10.1109/POWERENG.2009.4915168
    Date of publication: 2009
    Book chapter

    View View Open in new window  Share Reference managers Reference managers Open in new window

  • Stochastic study of the harmonic response of electric systems with capacitors and shunt filters

     Sainz Sapera, Luis; Mesas García, Juan José
    IASTED International Conference on Power and Energy Systems
    p. 56-61
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Deterministic and stochastic study of the single-phase non-linear load behavior

     Mesas García, Juan José; Sainz Sapera, Luis; Ferrer Biosca, Alberto
    IASTED International Conference on Power and Energy Systems
    p. 44-49
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Estudio y caracterización de dispositivos no lineales y su interacción en instalaciones eléctricas industriales

     Salichs Vivancos, Miguel; Sainz Sapera, Luis; Cunill Sola, Jordi; Clua Ruiz, Jordi; Mesas García, Juan José
    Competitive project

     Share

  • Ejercicios resueltos de tecnología eléctrica

     Boix Aragonès, Oriol; Sainz Sapera, Luis; Corcoles Lopez, Felipe; Suelves Joanxich, Francisco Jose; Mesas García, Juan José
    Date of publication: 2004-06
    Book

     Share Reference managers Reference managers Open in new window

  • Study of harmonic cancellation between AC/DC converter currents

     Sainz Sapera, Luis; Mesas García, Juan José; Herraiz Jaramillo, Sergio
    11th IEEE International Conference on Harmonics and Quality of Power
    p. 148-153
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Study of voltage sag effects on three-phase transformers

     Sainz Sapera, Luis; Corcoles Lopez, Felipe; Pedra Duran, Joaquin; Guasch, L; Herraiz Jaramillo, Sergio
    11th IEEE International Conference on Harmonics and Quality of Power
    p. 1-6
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Application of the short-term discrete Fourier transform to AC arc furnace power quality studies

     Herraiz Jaramillo, Sergio; Sainz Sapera, Luis; Eguiluz, L I; Mañana, M
    3rd IASTED International Conference on Power and Energy Systems
    p. 114-119
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Harmonic interaction in non-linear devices

     Mesas García, Juan José; Herraiz Jaramillo, Sergio; Sainz Sapera, Luis
    3rd IASTED International Conference on Power and Energy Systems
    p. 120-125
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Tecnología eléctrica

     Boix Aragonès, Oriol; Sainz Sapera, Luis; Corcoles Lopez, Felipe; Suelves Joanxich, Francisco Jose
    Date of publication: 2002-08
    Book

     Share Reference managers Reference managers Open in new window

  • Aportaciones al estudio del flujo armónico de cargas  Open access  awarded activity

     Herraiz Jaramillo, Sergio
    Department of Electrical Engineering, Universitat Politècnica de Catalunya
    Theses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    La distorsión armónica no es un fenómeno nuevo en los sistemas eléctricos de potencia, pero desde principios de los años setenta se ha convertido en un problema de creciente actualidad debido al incremento considerable de las cargas contaminantes en las redes eléctricas, en especial, de los dispositivos semiconductores y la electrónica de potencia. A causa del incremento de la presencia de dichas cargas no lineales, la distorsión armónica de las tensiones y corrientes ha ido aumentando produciendo un mal funcionamiento de los distintos elementos de los sistemas eléctricos.Los estudios e investigaciones iniciados en los años setenta en el campo de los armónicos en los sistemas eléctricos de potencia, han avanzado considerablemente a nivel internacional desde principios de los ochenta. Actualmente, la bibliografía tiende cada vez más a presentar trabajos de refinamiento sobre las técnicas desarrolladas para el estudio armónico.Enmarcada en este contexto, la tesis realiza una serie de aportaciones en algunos aspectos concretos del análisis armónico en sistemas eléctricos de potencia:· Estudios realizados sobre la calidad en el suministro eléctrico. En primer lugar se realiza un resumen sobre las transformadas al dominio de la frecuencia y sobre la situación actual referente a índices de calidad y normativas. Posteriormente, se presenta el estudio y la caracterización de un nuevo índice de calidad para señales aperiódicas, para las cuales los índices más comunes en la actualidad no son estrictamente aplicables. Se presenta también el estudio de la cuantificación del error que se comete, al aplicar la transformada discreta de Fourier, en el cálculo de armónicos de tensiones y corrientes del sistema con el fin de determinar su distorsión.· Estudio y modelización de rectificadores no controlados con filtro capacitivo monofásicos y trifásicos en conducción discontinua. Para el primero de ellos, se realiza una completa caracterización gráfica de su comportamiento, que permite analizar la influencia de los parámetros del dispositivo en dicho comportamiento. Se desarrolla un modelo analítico del rectificador cuando su punto de operación se define a partir de su corriente de continua consumida o de su potencia consumida y, por último, se utiliza el modelo propuesto para el estudio y aplicación de la normativa referente a la contaminación armónica. En cuanto a los rectificadores trifásicos, se desarrolla un modelo analítico que determina su comportamiento en modo de conducción discontinua cuando su punto de operación se define a partir de su corriente de continua consumida o de su potencia consumida. También se utiliza el modelo propuesto para el estudio y aplicación de la normativa referente a la contaminación armónica.· Se recoge una completa recopilación de los distintos enfoques de la formulación del flujo armónico de cargas, en condiciones equilibradas y desequilibradas, aparecidos en la bibliografía. El objetivo del estudio consiste en clasificar las numerosas formas de tratar el problema armónico en el dominio de la frecuencia y se completa con el balance, en condiciones equilibradas, de los datos, incógnitas y ecuaciones planteadas en cada formulación existente. Completando lo anterior, se analizan, a partir de dos ejemplos, las dos hipótesis más importantes en el enfoque del problema armónico: la influencia de la interacción armónica en el comportamiento de los dispositivos no lineales, y la consideración de la potencia sólo con su componente fundamental, y como pueden influir en el planteamiento y en los resultados finales del estudio.

    Harmonic distortion is not a new phenomenon in electric power systems but, since the early 1970s it has been growing interest problem due to the increase of contaminating loads in networks, particularly, semiconductor devices and power electronics. Because of the increase of these non linear loads, voltage and current harmonic distortion is augmenting, which is giving rise to the wrong operation of elements in electric systems.Studies and researches starting in the 70's in the area of harmonics in electric power systems have made progress since the early 1980s. At present, the bibliography tends to present detailed works about techniques developed for the harmonic study.In this context, the thesis makes a set of contributions in some particular aspects related to the harmonic analysis in electric power systems:· Studies of electric power quality. First, a summary on transforms in the frequency domain and on the current situation of power quality indices and regulations is given. Secondly, the study and characterization of a new power quality index for non-periodic signals, for which the most common indices are not suitable, is presented. Lastly, the error made in the application of the Fourier transform in the electric power system harmonic analysis, when it is used in the discrete signal treatment, is studied.· Study and modelling of uncontrolled single-phase and three-phase rectifiers with capacitive filter in discontinuous conduction. For the former, a complete graphical characterisation of its behaviour is made, which allows the influence of parameter devices to be analysed. An analytical model of the rectifier is developed when its working point is defined starting from its consumed direct current or its consumed power. The proposed model is used in the study and application of the standard concerning harmonic pollution. As regards the three-phase rectifier, an analytical model, which determines its behaviour in discontinuous mode when its working point is defined by its continuous direct current or its consumed power, is developed. The proposed model is used in the study and application of the standard concerning harmonic pollution.· Complete compilation of the different approaches in the formulation of harmonic load flow, in balanced and unbalanced conditions, that appear in the bibliography. The study classifies the large number of ways of tackling the harmonic problem in the frequency domain, and it is completed with the data, unknowns and equations in balanced conditions, in each existing formulation. In order to complete the study, the two most important hypothesis made in the harmonic problem are analysed: the influence of harmonic interaction in the behaviour of non-linear devices, and the consideration of power depending only on the fundamental component, and how they can influence in the formulation and the final results.

  • New PLL approach considering unbalanced line voltage conditions

     Rodriguez Cortes, Pedro; Bergas Jane, Joan Gabriel; Sainz Sapera, Luis
    Second IASTED International Conference Power and Energy Systems (EuroPES'02)
    p. 329-334
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Study of AC contactors during voltage sags

     Pedra Duran, Joaquin; Corcoles Lopez, Felipe; Sainz Sapera, Luis
    10th International Conference on Harmonics and Quality of Power
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Resonant behaviour of the Steinmetz system

     Sainz Sapera, Luis; Jordi, O; Chindris, Mircea
    Second IASTED International Conference Power and Energy Systems (EuroPES'02)
    p. 239-244
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • A simple model of a three-phase uncontrolled rectifier

     Herraiz Jaramillo, Sergio; Sainz Sapera, Luis; Corcoles Lopez, Felipe; Pedra Duran, Joaquin
    Second IASTED International Conference Power and Energy Systems (EuroPES'02)
    p. 329-334
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Virtual instrumentation system applied to transformer characterisation

     Alzórriz, J A García; Pedra Duran, Joaquin; Corcoles Lopez, Felipe; Sainz Sapera, Luis; Chindris, M D
    8th Int. Conf. on Optimization of Electrical and Electronic Equipment
    p. 879-884
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Fuzzy logic controller for Steinmetz symmetrizing circuitry with variable reactive elements

     Chindris, Mircea; Cziker, A; Stefanescu, S; Sainz Sapera, Luis
    8th Int. Conf. on Optimization of Electrical and Electronic Equipment
    p. 233-238
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Harmonic filter design by the attenuation factor method

     Sainz Sapera, Luis
    10th International Conference on Harmonics and Quality of Power
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Synchronous double reference frame PLL applied to unified power quality

     Rodriguez Cortes, Pedro; Sainz Sapera, Luis; Bergas Jane, Joan Gabriel
    10th International Conference on Harmonics and Quality of Power
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Programa para el diseño de equipos de compensación y filtrado

     Sainz Sapera, Luis; Rius, I; Marimon, X; Alves, R L
    III Congreso Venezolano de Ingeniería Eléctrica
    p. 295-300
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Armónicos en Instalaciones Industriales y Comerciales

     Pedra Duran, Joaquin; Sainz Sapera, Luis; Salichs, Miquel; Corcoles Lopez, Felipe; Suelves Joanxich, Francisco Jose; Rodriguez Cortes, Pedro; Candela Garcia, Jose Ignacio; Garcia-Alzórriz Pardo, Juan Antonio
    Competitive project

     Share

  • Estudio y modelización de los convertidores AC/DC de seis y doce pulsos  Open access

     Tubau Navarra, Eduardo
    Department of Electrical Engineering, Universitat Politècnica de Catalunya
    Theses

    Read the abstract Read the abstract Access to the full text Access to the full text Open in new window  Share Reference managers Reference managers Open in new window

    Debido al aumento de la presencia de dispositivos no lineales en los Sistemas Eléctricos de Potencia existe un creciente interés en la formulación y resolución del flujo de cargas en presencia de armónicos. El tratamiento del problema anterior pasa, entre otras cosas, por una correcta caracterización de dichos dispositivos no lineales ya que son los elementos contaminantes del sistema. Es por ello que existen en la literatura gran cantidad de estudios sobre su modelización e incorporación al flujo de cargas. Entre dichos dispositivos destacan los convertidores AC/DC de seis pulsos debido a su extensa utilización así como al hecho de ser un consumidor de elevada potencia, y por tanto, muy contaminante. También son utilizados, aunque con menos frecuencia, los convertidores AC/DC de doce pulsos, ya que con ellos se elimina la inyección de los armónicos mas bajos en la red (el quinto y el séptimo) que son los de mayor magnitud. Su menor utilización, a pesar de la ventaja que ofrecen, es por ser mucho más complejos y caros de fabricación. Se inicia la Tesis realizando un extenso y completo estudio sobre las numerosas modelizaciones del convertidor AC/DC de seis pulsos existentes en la bibliografía para, posteriormente realizar un estudio general de dicho dispositivo. En este sentido se analiza su funcionamiento con alimentación no senoidal y desequilibrada y no se supone igualdad en las impedancias de cortocircuito del transformador que conecta el convertidor a la red. Se considera la posibilidad de componente resistiva en las impedancias de las tres fases del sistema. Asimismo, se hace el tratamiento para ángulos de disparo distintos, y se considera el rizado en el lado de continua. Esta generalidad en el tratamiento del problema es una de las aportaciones de la tesis.Además se presentan tres modelos simplificados para el cálculo aproximado de los armónicos de corriente que el convertidor AC/DC de seis pulsos inyecta en la red en condiciones desequilibradas, generalizando los modelos existentes en la literatura para el caso de la alimentación equilibrada. También se realiza un estudio de la validez de estos modelos. La propuesta de estos modelos aproximados (en condiciones desequilibradas) para el calculo de la intensidad que inyecta el convertidor constituye otra de las aportaciones de la tesis. Por último, se presenta el estudio del convertidor de doce pulsos totalmente análogo al presentado para el convertidor de doce pulsos se considera conectado a la red por dos transformadores, ambos con la misma placa de características pero uno en estrella-estrella y el otro en triangulo-estrella. Esta diferencia en el tipo de conexión de los transformadores es clave para la secuencia de topologías del convertidor. Se analiza el funcionamiento del convertidor con alimentación no senoidal, desequilibrada, asimismo, se admite la posibilidad de que las impedancias de cortocircuito de los transformadores que conectan el convertidor a red sean distintas en cada una de las fases. Se considera la posibilidad de componente resistiva en las impedancias de las fases del sistema. Asimismo, se hace el tratamiento para ángulos de disparo distintos, y se considera el rizado en el lado de continua. Esta generalidad en el tratamiento del problema es otra de las aportaciones de la tesis.

  • Harmonic load-flow formulations

     Sainz Sapera, Luis
    The sixth IASTED International Conference on Power and Energy Systems
    Presentation's date: 2001-07-03
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • A simple model of a single-phase uncontrolled rectifier

     Sainz Sapera, Luis
    The sixth IASTED International Conference on Power and Energy Systems
    Presentation's date: 2001-07-03
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Steinmetz system study under non-sinusoidal conditions

     Sainz Sapera, Luis
    The sixth IASTED International Conference on Power and Energy Systems
    Presentation's date: 2001-07-03
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Tecnología eléctrica (tomos 1 y 2)

     Boix Aragonès, Oriol; Sainz Sapera, Luis; Suelves Joanxich, Francisco Jose; Corcoles Lopez, Felipe
    Date of publication: 2001-02
    Book

     Share Reference managers Reference managers Open in new window

  • Modelo analitico del comportamiento armonico de un convertidor AC/DC de doce pulsos en condiciones desequilibradas

     Tubau Navarra, Eduardo; Sainz Sapera, Luis; Pedra Duran, Joaquin
    VII Jornadas Hispano Lusas de Ingeniería Eléctrica
    p. 27-32
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Efectos de los huecos de tensión en los equipos industriales

     Pedra Duran, Joaquin; Boix Aragonès, Oriol; Corcoles Lopez, Felipe; Sainz Sapera, Luis; Sudria Andreu, Antoni; Galceran Arellano, Samuel; Suelves Joanxich, Francisco Jose; Bergas Jane, Joan Gabriel; Rull Duran, Joan
    Competitive project

     Share

  • A simple model of a single-phase uncontrolled rectifier

     Herraiz Jaramillo, Sergio; Sainz Sapera, Luis; Pedra Duran, Joaquin
    The sixth IASTED International Conference on Power and Energy Systems
    p. 320-324
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Error en el analisis de cargas no lineales al aplicar la transformada discreta de Fourier

     Herraiz Jaramillo, Sergio; Sainz Sapera, Luis
    VII Jornadas Hispano Lusas de Ingeniería Eléctrica
    p. 213-218
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window

  • Steinmetz system study under non-sinusoidal conditions

     Sainz Sapera, Luis; Jordi, O; Chindris, Mircea
    The sixth IASTED International Conference on Power and Energy Systems
    p. 372-377
    Presentation of work at congresses

     Share Reference managers Reference managers Open in new window