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  • Global MPPT scheme for photovoltaic string inverters based on restricted voltage window search algorithm

     Boztepe, Mutlu; Guinjoan Gispert, Francisco; Velasco Quesada, Guillermo; Silvestre Berges, Santiago; Chouder, Aissa; Karatepe, Engin
    IEEE transactions on industrial electronics
    Date of publication: 2014-07-01
    Journal article

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    String inverter photovoltaic (PV) systems with bypass diodes require improved global maximum power point tracking (GMPPT) algorithms to effectively reach the absolute maximum power operating point. Several GMPPT algorithms have been proposed to deal with this problem, but most of them require scanning wide voltage ranges of the PV array from nearly zero voltage to open-circuit voltage that increases the scanning time and, in turn, causes energy loss. This paper presents a novel GMPPT method which significantly restricts the voltage window search range and tracks the global power peak rapidly in all shading conditions. Simulation tests and experimental comparisons with another GMPPT algorithm are presented to highlight the features of the presented approach.

  • Optical and compositional characterization of GaAs(Ti) thin films deposited by R.F. magnetron sputtering

     Boronat Moll, Artur; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Journal of non-crystalline solids
    Date of publication: 2013-01
    Journal article

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    GaAs thin films with Ti incorporated, to which we refer to as GaAs(Ti), have been deposited by R.F. sputtering on fused silica and c-GaAs substrates under different process conditions. The films were characterized by EPMA, XPS and XRD to study the composition and structural dependence on the deposition conditions, paying special attention on the Ti content of the films. The optical responses of the films were analyzed by spectrofotometric, PDS and FTIR measurements. The Ti content is in all the samples above 1020 atoms/cm3, so we can consider them as GaAs films highly Ti doped. It has been observed that an evolution of the Ga/As atomic content in relation with the Ti incorporation, which together with the results obtained from XPS measurements, indicates a possible substitution of Ga by Ti atoms in the deposited films.

    GaAs thin films with Ti incorporated, to which we refer to as GaAs(Ti), have been deposited by R.F. sputtering on fused silica and c-GaAs substrates under different process conditions. The films were characterized by EPMA, XPS and XRD to study the composition and structural dependence on the deposition conditions, paying special attention on the Ti content of the films. The optical responses of the films were analyzed by spectrofotometric, PDS and FTIR measurements. The Ti content is in all the samples above 1020 atoms/cm3, so we can consider them as GaAs films highly Ti doped. It has been observed that an evolution of the Ga/As atomic content in relation with the Ti incorporation, which together with the results obtained from XPS measurements, indicates a possible substitution of Ga by Ti atoms in the deposited films.

  • A virtual reality study of surrounding obstacles on BIPV systems for estimation of long-term performance of partially shaded PV arrays

     Celik, Berk; Karatepe, Engin; Gokmen, Nuri; Silvestre Berges, Santiago
    Renewable energy
    Date of publication: 2013-12
    Journal article

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    This work presents a new analytical method to evaluate the efficiency of PV systems working in partial shading conditions by taking into account the effect of surrounding obstacles. A mathematical procedure to determine the shadowed area on PV modules, depending on the location of the PV system and obstacles nearby the array has been implemented. This methodology allows the study of the power losses present in the PV systems due to partial shading conditions as well as its effect on the evolution of the maximum power point of the array. The application of this methodology on the behavior of three PV systems located in different cities of Turkey, such as Istanbul, Izmir, and Antalya, working under the same conditions of obstacle surrounding, along a year is presented.

  • An efficient fault diagnosis method for PV systems based on operating voltage-window

     Gokmen, Nuri; Karatepe, Engin; Silvestre Berges, Santiago; Celik, Berk; Ortega Villasclaras, Pablo Rafael
    Energy conversion and management
    Date of publication: 2013-09
    Journal article

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    With the increasing use of photovoltaic (PV) systems, the research studies to improve the efficiency of PV systems have gained greater interest in recent years, especially under non-uniform operating conditions. However, there is a little attention on fault diagnosis of PV arrays. This paper develops and demonstrates a method that can efficiently detect the number of open and short circuit faults and discriminate between them and partial shading conditions. This method is based on only the measurement of operating voltage of PV string and ambient temperature. In that manner, the proposed method takes into consideration of the minimum number of sensors to reduce the cost of the system, as one of the main purposes of this study. The simulation and experimental results are presented to demonstrate the effectiveness of the proposed method under both uniform and non-uniform irradiance conditions.

    With the increasing use of photovoltaic (PV) systems, the research studies to improve the efficiency of PV systems have gained greater interest in recent years, especially under non-uniform operating conditions. However, there is a little attention on fault diagnosis of PV arrays. This paper develops and demonstrates a method that can efficiently detect the number of open and short circuit faults and discriminate between them and partial shading conditions. This method is based on only the measurement of operating voltage of PV string and ambient temperature. In that manner, the proposed method takes into consideration of the minimum number of sensors to reduce the cost of the system, as one of the main purposes of this study. The simulation and experimental results are presented to demonstrate the effectiveness of the proposed method under both uniform and non-uniform irradiance conditions.

  • Células solares de banda intermedia

     Martí, Antonio; Antolin, Elisa; Linares, P.G.; Ramiro, I.; López, E.; Artacho, Irene; Hernández, E.; Mellor, A.; Mendes, Manuel; Fuertes Marrón, David; Tobias, Ignacio; Tablero, C.; Cristobal, A.B.; Luque, Antonio; Martil, Ignacio; Olea, Javier; Pastor, David; Garcia Hemme, E.; Hernansanz, R.; DelPrado, A.; Gonzalez Diaz, German; Ripalda, J.M.; González, Yolanda; Briones, F.; Silvestre Berges, Santiago; Boronat Moll, Artur; Castañer Muñoz, Luis Maria
    Revista española de física
    Date of publication: 2013-05-14
    Journal article

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    Las células solares de banda intermedia se inventaron en España. Constituyen una propuesta para aumentar la eficiencia de las células solares por encima del límite de Shockley y Queisser para células de un solo gap. El número de ideas para llevarlas a la práctica (desde la utilización de puntos cuánticos a la implantación selectiva de impurezas) se ha ido expandiendo a medida que nuestra comprensión ha ido aumentando. En este artículo repasamos el concepto de célula solar de banda intermedia y algunas de estas ideas para llevarla a la práctica.

  • Ohmic contacts fabricated on moderately doped p-type GaAs by sputtering deposition and a laser-firing process

     Boronat Moreiro, Alfredo; Silvestre Berges, Santiago; Orpella Garcia, Alberto
    Journal of vacuum science and technology. B, Nanotechnology & microelectronics
    Date of publication: 2013-09-12
    Journal article

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    A novel approach is used to achieve ohmic contacts on moderately doped p-type GaAs substrates. A laser-firing process is used instead of the conventional annealing step. The morphology of the crater created by the laser-firing process and the electrical response of the metal¿semiconductor contact are characterized.

  • Monitoring, modelling and simulation of PV systems using LabVIEW

     Chouder, Aissa; Silvestre Berges, Santiago; Taghezouit, Bilal; Karatepe, Engin
    Solar energy
    Date of publication: 2013-05
    Journal article

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    This paper presents a detailed characterization of the performance and dynamic behaviour of photovoltaic systems by using LabVIEW real-time interface system. The developed software tool integrates several types of instruments into a single system which is able to offer online measurements all data sources and comparison simulation results with monitored data in real-time. Comprehensive monitoring and analyzing of PV systems play a very important role. The proposed method is a low-cost solution to provide fast, secure and reliable system by making the system database-ready for performance analysis of PV systems. The proposed method is also applied to a grid connected PV system in the Centre de Developpement des Energies Renouvelables (CDER) in Algeria. The results show that there is a good agreement between the measured and simulation results values. The integration methodology of robust simulation and monitored data in real-time can be extended to study the fault diagnosis of a PV system.

    This paper presents a detailed characterization of the performance and dynamic behaviour of photovoltaic systems by using LabVIEW real-time interface system. The developed software tool integrates several types of instruments into a single system which is able to offer online measurements all data sources and comparison simulation results with monitored data in real-time. Comprehensive monitoring and analyzing of PV systems play a very important role. The proposed method is a low-cost solution to provide fast, secure and reliable system by making the system database-ready for performance analysis of PV systems. The proposed method is also applied to a grid connected PV system in the Centre de Developpement des Energies Renouvelables (CDER) in Algeria. The results show that there is a good agreement between the measured and simulation results values. The integration methodology of robust simulation and monitored data in real-time can be extended to study the fault diagnosis of a PV system.

  • Influence of hydrogen on the optical absorption response of GaAs(Ti) films deposited by R.F. sputtering

     Boronat Moreiro, Alfredo; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    Presentation's date: 2013-02
    Presentation of work at congresses

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    In the present work we have investigated the optical absorption behavior of GaAs(Ti) films deposited by r.f sputtering technique under different H2 partial pressures. In previous work we have already demonstrated the feasibility to obtain GaAs films with high dose of Ti, which we refer to as GaAs(Ti). Any absorption peak, which could be related with the presence of an intermediate band, has been identified. The low Etauc parameter together with a broad Urbach tail of the films make us to suspect that the possible presence of an absorption peak could be hidden. The incorporation of H2 on sputtered GaAs films have demonstrated before a shift of the Etauc parameter to higher values and a reduction of the Urbach tail.

    In the present work we have investigated the optical absorption behavior of GaAs(Ti) films deposited by r.f sputtering technique under different H2 partial pressures. In previous work we have already demonstrated the feasibility to obtain GaAs films with high dose of Ti, which we refer to as GaAs(Ti). Any absorption peak, which could be related with the presence of an intermediate band, has been identified. The low Etauc parameter together with a broad Urbach tail of the films make us to suspect that the possible presence of an absorption peak could be hidden. The incorporation of H2 on sputtered GaAs films have demonstrated before a shift of the Etauc parameter to higher values and a reduction of the Urbach tail.

  • Low pressure spherical thermal anemometer for space missions

     Kowalski, Lukasz; Jimenez Serres, Vicente; Dominguez Pumar, Manuel M.; Gorreta Marine, Sergio; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Annual IEEE Conference on Sensors
    Presentation's date: 2013-11
    Presentation of work at congresses

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    A novel spherically shaped thermal anemometer for low pressure, Mars-like conditions, is described. The concept has been designed using finite element multyphysics simulations to find out the thermal conductance to the ambient for varying conditions of wind speed and direction and ambient pressure and temperature. A prototype 1cm diameter suitable to work under these environment in the range 0.25-10m/s speed has been build using 3D printing and tested inside a low pressure chamber. The protopype shown has two separated hemispheres, independently heated above the ambient temperature, providing angle sensitivity in one plane. Measurements of the heating power in both hemispheres required to keep an overheat of 30K are shown as a function of the wind direction showing good sensitivity at 0.5m/s. One improvement of this sensor is the means provided to also heat the core of the sphere where the circuit board is located thereby avoiding most of the conduction losses to the supports. The concept is scalable to other wind speed and pressure conditions and also to full 3D measurements.

  • Thermal response of AlN and CNx films as coatings of thin film anemometers

     Arroyo, J.; Silvestre Berges, Santiago; Coll Valenti, Arnau; Castañer Muñoz, Luis Maria
    Measurement
    Date of publication: 2013-05
    Journal article

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    Layers of AlN and CNx were investigated as suitable films to coat thin film anemometers because they are simultaneously electrical isolators and thermal conductors. Thermal time constants were measured and thermal equivalent models are proposed in this work. AlN performed better in the experiments.

    Layers of AlN and CNx were investigated as suitable films to coat thin film anemometers because they are simultaneously electrical isolators and thermal conductors. Thermal time constants were measured and thermal equivalent models are proposed in this work. AlN performed better in the experiments.

  • Voltage band based global MPPT controller for photovoltaic systems

     Gokmen, Nuri; Karatepe, Engin; Ugranli, Faruk; Silvestre Berges, Santiago
    Solar energy
    Date of publication: 2013-09
    Journal article

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    This paper presents a new maximum power point tracking algorithm for PV systems useful in case of non-uniform irradiance conditions. This algorithm takes into account the number of bypass diodes in a PV string to calculate the voltage bands associated with the peak power points that appear in the power¿voltage characteristic of the PV system. The main contribution of this study is to state that the global maximum power point can be tracked by considering only the possible voltage bands which can be found by using the proposed analytical equation in a simple manner. The algorithm is based in the evaluation and analysis of these voltage bands and in the selection of the PV system voltage related to the maximum power point of work. The proposed algorithm has been validated by means of simulation and also in an experimental study.

    This paper presents a new maximum power point tracking algorithm for PV systems useful in case of non-uniform irradiance conditions. This algorithm takes into account the number of bypass diodes in a PV string to calculate the voltage bands associated with the peak power points that appear in the power–voltage characteristic of the PV system. The main contribution of this study is to state that the global maximum power point can be tracked by considering only the possible voltage bands which can be found by using the proposed analytical equation in a simple manner. The algorithm is based in the evaluation and analysis of these voltage bands and in the selection of the PV system voltage related to the maximum power point of work. The proposed algorithm has been validated by means of simulation and also in an experimental study.

  • Sub-Bandgap external quantum efficiency in Ti implanted Si heterojunction with intrinsic thin layer cells

     Silvestre Berges, Santiago; Boronat Moreiro, Alfredo; Colina Brito, Monica Alejandra; Castañer Muñoz, Luis Maria; Olea, Javier; Pastor, David; DelPrado, A.; Martil, Ignacio; Gonzalez Diaz, German; Luque, Antonio; Antolin, Elisa; Hernandez, Estela; Ramiro, Iñigo; Artacho, Irene; López, Esther; Martí, Antonio
    Japanese journal of applied physics
    Date of publication: 2013-11
    Journal article

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    In this work we present the manufacturing processes and results obtained from the characterization of heterojunction with intrinsic thin layer solar cells that include a heavily Ti ion implanted Si absorbing layer. The cells exhibit external circuit photocurrent at photon energies well below the Si bandgap. We discuss the origin of this below-bandgap photocurrent and the modifications in the hydrogenated amorphous intrinsic Si layer thickness to increase the open-circuit voltage.

  • Effect of annealing atmosphere in the properties of GaAs layers deposited by sputtering techniques on Si substrates

     Galiana, Beatriz; Silvestre Berges, Santiago; Algora, C.; Rey-Stolle, I
    Journal of materials science. Materials in electronics
    Date of publication: 2013-10
    Journal article

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    This work reports changes in the structural properties of sputtered GaAs layers deposited on Si (100) substrates induced by thermal annealing under different arsine atmospheres. The effects of the AsH3 partial pressure (PAsH3) and of the annealing temperature in the GaAs layer properties were analyzed by means of in situ reflectance spectroscopy, in situ transient reflectance at 2.65 eV, X-ray diffraction and atomic force microscopy. The results obtained reveal a direct correlation between the AsH3 partial pressure and the evolution of the GaAs surface morphology as well as the annihilation of As clusters formed during the sputtering procedure.

  • Tecnología de fabricación de células solares con materiales candidatos a presentar banda intermedia.

     Boronat Moreiro, Alfredo
    Defense's date: 2013-10-11
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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  • Optical absorption of radio frequency sputtered GaAs(Ti) films

     Boronat Moll, Artur; Silvestre Berges, Santiago; Fuertes Marrón, David; Castañer Muñoz, Luis Maria; Martí, A.; Luque, Antonio
    Journal of materials science. Materials in electronics
    Date of publication: 2012-08-14
    Journal article

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    Composition and optical absorption of thin films of GaAs(Ti) and GaAs, deposited by sputtering on glass substrates under different process conditions, have been investigated. The thin films obtained are typically 200 nm thick. ToF–SIMS measurements show a quite constant concentration and good uniformity of Ti profiles along the GaAs(Ti) layers in all cases and EPMA results indicate that Ti content increases with the substrate temperature in the sputtering process. Measurements of the transmittance and reflectance spectra of the GaAs and GaAs(Ti) thin films have been carried out. In the optical characterization of the films it is found that optical absorption is enhanced in all samples containing Ti. The determination of the optical gap from the optical absorption, shows optical gap variations from 1.15 to 1.29 eV in the GaAs thin films, and from 0.83 to 1.13 eV in the GaAs(Ti) thin films. The differences in absorption and EgTAUC observed between samples of GaAs and GaAs(Ti) are consistent with the presence of an intermediate band.

  • Simple diagnostic approach for determining of faulted PV modules in string based PV arrays

     Gokmen, Nuri; Karatepe, Engin; Celik, Berk; Silvestre Berges, Santiago
    Solar energy
    Date of publication: 2012-11
    Journal article

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    This paper proposes a simple diagnostic method to determine the number of open and short circuited PV modules in a string of a PV system by taking into account the economical factor, such as minimum number of sensors. The diagnostic algorithm has as inputs the irradiance level, the PV modules temperature, the number of PV modules present in the string analyzed and its output power. So, just temperature and irradiance sensors, as well as a power meter by string are needed in the monitoring system forming part of the fault diagnostic system. The proposed fault detection method has been successfully validated experimentally.

    This paper proposes a simple diagnostic method to determine the number of open and short circuited PV modules in a string of a PV system by taking into account the economical factor, such as minimum number of sensors. The diagnostic algorithm has as inputs the irradiance level, the PV modules temperature, the number of PV modules present in the string analyzed and its output power. So, just temperature and irradiance sensors, as well as a power meter by string are needed in the monitoring system forming part of the fault diagnostic system. The proposed fault detection method has been successfully validated experimentally.

  • Modeling and simulation of a grid connected PV system based on the evaluation of main PV module parameters

     Chouder, Aissa; Silvestre Berges, Santiago; Sadaoui, Nawel; Rahmani, Lazhar
    Simulation modelling practice and theory
    Date of publication: 2012-01
    Journal article

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    In this work we present a new method for the modeling and simulation study of a photovoltaic grid connected system and its experimental validation. This method has been applied in the simulation of a grid connected PV system with a rated power of 3.2 Kwp, composed by a photovoltaic generator and a single phase grid connected inverter. First, a PV module, forming part of the whole PV array is modeled by a single diode lumped circuit and main parameters of the PV module are evaluated. Results obtained for the PV module characteristics have been validated experimentally by carrying out outdoorI–Vcharacteristic measurements. To take into account the power conversion efficiency, the measured AC output power against DC input power is fitted to a second order efficiency model to derive its specific parameters.The simulation results have been performed through Matlab/Simulink environment. Results has shown good agreement with experimental data, whether for theI–Vcharacteristics or for the whole operating system. The significant error indicators are reported in order to show the effectiveness of the simulation model to predict energy generation for such PV system.

  • Optical measurements on GaAs(Ti) thin films sputtered on GaAs

     Boronat Moreiro, Alfredo; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    Presentation's date: 2011
    Presentation of work at congresses

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    Some sputtering processes of GaAs(Ti) onto c-GaAs have been carried out in order to obtain thin films as candidates to be intermediate band photovoltaic materials. This work presents the results obtained in the study of the absorptance, from transmittance and reflectance responses, in samples obtained at different conditions of temperature and power during the sputtering deposition.

  • Review of system design and sizing tools

     Silvestre Berges, Santiago
    Date of publication: 2011-11-01
    Book chapter

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  • Sensor de viento para la superficie de marte para la misión Metnet (fase inicial)

     Jimenez Serres, Vicente; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria
    Participation in a competitive project

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  • Light harvesting photovoltaic mini-generator

     Bermejo Broto, Alexandra; Silvestre Berges, Santiago; Ortega Villasclaras, Pablo Rafael; Herrera, Gerard
    Progress in photovoltaics
    Date of publication: 2011-08-23
    Journal article

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  • Access to the full text
    Towards photovoltaic powered artificial retina  Open access

     Silvestre Berges, Santiago; Bermejo Broto, Alexandra; Guasch Murillo, Daniel; Ortega Villasclaras, Pablo Rafael; Castañer Muñoz, Luis Maria
    Journal of Accessibility and Design for All
    Date of publication: 2011
    Journal article

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    The aim of this article is to provide an overview of current and future concepts in the field of retinal prostheses, and is focused on the power supply based on solar energy conversion; we introduce the possibility of using PV minimodules as power supply for a new concept of retinal prostheses: Photovoltaic Powered Artificial Retina (PVAR). Main characteristics of these PV modules are presented showing its potential for this application.

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    Fault detection and automatic supervision methodology for PV systems  Open access

     Silvestre Berges, Santiago; Chouder, Aissa
    European Photovoltaic Solar Energy Conference and Exhibition
    Presentation's date: 2010-09
    Presentation of work at congresses

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    In this work, we show a new methodology for automatic supervision and fault detection of PV Systems, based mainly on the analysis of the power losses. This methodology includes parameter extraction techniques to calculate main PV system parameters from monitoring data [1-2], taking into account the real irradiance and module temperature, allowing simulation and evaluation of the PV system behaviour in real time.

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    Study of GaAs(Ti) thin films as candidates for IB solar cells manufacturing  Open access

     Silvestre Berges, Santiago; Boronat Moreiro, Alfredo; Castañer Muñoz, Luis Maria
    IEEE Photovoltaic Specialists Conference
    Presentation's date: 2010-06
    Presentation of work at congresses

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    Thin films of GaAs(Ti) have been deposited by sputtering on glass and n_GaAs substrates under different process conditions. Optical characteristics of these samples have been analyzed to study the potential of this material in intermediate Band solar cell manufacturing.

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    Identifiying causes of power reduction in photovoltaic systems  Open access

     Silvestre Berges, Santiago; Chouder, Aissa
    IEEE Photovoltaic Specialists Conference
    Presentation's date: 2010-06-21
    Presentation of work at congresses

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    A procedure for the identification of main causes of power reduction in PV systems, based on the continuous check of the real measured losses and his comparison to simulation results obtained for the same parameter, is presented in this work.

  • Automatic supervision and fault detection of PV systems based on power losses analysis

     Chouder, Aissa; Silvestre Berges, Santiago
    Energy conversion and management
    Date of publication: 2010-10
    Journal article

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  • Analysis, diagnosis and fault detection in photovoltaic systems

     Chouder, Aissa
    Defense's date: 2010-02-09
    Department of Electronic Engineering, Universitat Politècnica de Catalunya
    Theses

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    Analysis of GaAs-Ti thin films deposited by sputtering onto c-Si and GaAs  Open access

     Silvestre Berges, Santiago; Puigdollers Gonzalez, Joaquin; Boronat Moreiro, Alfredo; Castañer Muñoz, Luis Maria
    Spanish Conference on Electron Devices
    Presentation's date: 2009-02-11
    Presentation of work at congresses

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    Some sputtering processes of GaAs and Ti onto glass, c-Si and c-GaAs substrates have been carried out in order to obtain thin films as candidates to be intermediate band photovoltaic materials. This work presents first results concerning the optical and structural properties of the different deposited thin films.

  • Study of bypass diodes configuration on PV modules

     Silvestre Berges, Santiago; Boronat Moreiro, Alfredo; Chouder, Aissa
    Applied energy
    Date of publication: 2009-09
    Journal article

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  • Analysis Model of Mismatch Power Losses in PV Systems

     Chouder, Aissa; Silvestre Berges, Santiago
    Journal of solar energy engineering. Transactions of the ASME
    Date of publication: 2009-05
    Journal article

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  • Método para la fabricación de una célula solar de silicio de banda intermedia

     Puigdollers Gonzalez, Joaquin; Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria; Martí, Vega A; Luque, A; Antolín, E; Olea, J; Pastor, D; Martil, Ignacio
    Date of request: 2009-02-19
    Invention patent

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    Método para la fabricación de una célula solar de silicio de banda intermedia.

    Es posible crear materiales de banda intermedia en silicio mediante la implantación iónica en dosis elevadas de elementos que produzcan centros profundos en el silicio. Sin embargo, el material de banda intermedia (4) se crea en la superficie de la oblea implantada (7) planteándose una dificultad técnica ya que, para fabricar una célula solar completa, resulta necesario envolver este material de banda intermedia entre un semiconductor de tipo p (5) y otro de tipo n (6) utilizando un proceso de baja temperatura que evite la segregación y formación de clústeres del elemento implantado. En esta patente, esta dificultad se resuelve creando la estructura p n mediante la deposición de capas de silicio amorfo hidrogenado de calidad a baja temperatura.

  • Herramientas de simulación para sistemas fotovoltaicos en ingeniería

     Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria; Guasch Murillo, Daniel
    Formación universitaria
    Date of publication: 2008-01
    Journal article

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  • Effects of shadowing on photovoltaic module performance

     Silvestre Berges, Santiago
    Progress in photovoltaics
    Date of publication: 2008-01
    Journal article

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  • Manipulación de micro-nano partículas en 2D y 3D

     Castañer Muñoz, Luis Maria; Silvestre Berges, Santiago; Rodriguez Martinez, Angel; Bermejo Broto, Alexandra; Bardes Llorensi, Daniel; Lopez Gonzalez, Juan Miguel
    Participation in a competitive project

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  • ELefANTC E-Learning for Acquiring New Types of Skills - Continued.

     Silvestre Berges, Santiago; Soriano Ibáñez, Miguel; Hernández Serrano, Juan Bautista
    Participation in a competitive project

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  • Analysis of power losses in pv systems

     Silvestre Berges, Santiago; Chouder, Aissa
    23rd Europeran Photovoltaic Solar Energy Conference
    Presentation of work at congresses

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  • Teaching PV in an Engineering environment

     Castañer Muñoz, Luis Maria; Silvestre Berges, Santiago
    4th International Workshop on Teaching in Photovoltaics
    Presentation of work at congresses

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  • Simulation of fuzzy-based MPP tracker and performance comparison with perturb & observe method

     Chouder, Aissa; Guinjoan Gispert, Francisco; Silvestre Berges, Santiago
    Revue des energies renouvelables
    Date of publication: 2008-12
    Journal article

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  • Power Losses in Shaded PV Modules

     Silvestre Berges, Santiago
    22nd European Photovoltaic Solar Energy Conference
    Presentation of work at congresses

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  • Shading effects in characteristic parameters of PV modules

     Silvestre Berges, Santiago
    Spanish Conference on Electron Devices
    Presentation of work at congresses

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  • Modelisation et simulation des composants de la mini-centrale photovoltaique connectee au reseau du cder

     Cherfa, F; Chouder, Aissa; Hadjarab, A; Oussaid, R; Silvestre Berges, Santiago
    ICRESD_07 - International Conference for Renewable Energies and Sustainable Development
    Presentation of work at congresses

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  • Etude Comparative de Simulation entre PVSYST3 et PSpice de la Centrale Photovoltaïque Connectée au Résau du CDER

     Chouder, Aissa; Cherfa, F; Hadjarab, A; Silvestre Berges, Santiago; Oussaid, R
    CER'07 - Colloque International Sur les Énergies Renovables
    Presentation of work at congresses

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  • Etude comparative de simulation entre PVsyst3 et PSpice de la centrale photovoltaïque connectée au réseau du CDER

     Chouder, Aissa; Cerfa, F; Hadj, A Arab; Silvestre Berges, Santiago
    Revue des energies renouvelables
    Date of publication: 2007-05
    Journal article

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  • Simulation of photovoltaic grid connected inverter in case of grid-failure

     Chouder, Aissa; Silvestre Berges, Santiago
    Revue des energies renouvelables
    Date of publication: 2006-12
    Journal article

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  • Investigación en Materia de una nueva generación de materiales, células y sistemas para la conversión fotovoltaica (GENESIS-FV) GENESIS CSD I00912

     Silvestre Berges, Santiago; Castañer Muñoz, Luis Maria; Puigdollers Gonzalez, Joaquin
    Participation in a competitive project

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  • IEEE- Senior member

     Silvestre Berges, Santiago
    Award or recognition

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  • ICT in company management and marketing. Module 1.3: English - managers and business terminology

     Editors, Terézia Hasková; Horváthová, Alexandra; Boris, Hudák; Podhradskú, Pavol; Poledna, Juraj; Sieglová, Eva; Silvestre Berges, Santiago; Trúchly, Peter; Morislav, Uricek
    Date of publication: 2005-10
    Book

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  • Selected applications of ICT in eneterprises, institutions and SMEs. Module 2.2: Management and Control of ICT infrastructure

     Zdenek, Brabec; Gamec, Ján; Hofman, Petr; Medvecký, Martin; Pauliny, Martin; Silvestre Berges, Santiago
    Date of publication: 2005-10
    Book

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  • Sistema d'Agents Portables Incrustats per a Entorns Naturals Segurs. (SAPIENS) (10605 IMSERSO)

     Català Mallofré, Andreu; Angulo Bahón, Cecilio; Guasch Murillo, Daniel; Silvestre Berges, Santiago; Diaz Boladeras, Marta; Cabestany Moncusi, Joan; Perez Lopez, Carlos
    Participation in a competitive project

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