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Ara es mostren els items 21-38 de 38

    • Identifying health status of wind turbines by using self organizing maps and interpretation-oriented post-processing tools 

      Blanco, Alejandro; Gibert, Karina; Marti Puig, Pere; Cusidó Roura, Jordi; Sole Casals, Jordi (2018-04-01)
      Article
      Accés obert
      Identifying the health status of wind turbines becomes critical to reduce the impact of failures on generation costs (between 25–35%). This is a time-consuming task since a human expert has to explore turbines individually. ...

    • Improved ensemble learning for wind turbine main bearing fault diagnosis 

      Beretta, Mattia; Vidal Seguí, Yolanda; Sepúlveda, José; Porro Martorell, Olga; Cusidó Roura, Jordi (Multidisciplinary Digital Publishing Institute, 2021-08-17)
      Article
      Accés obert
      The goal of this paper is to develop, implement, and validate a methodology for wind turbines’ main bearing fault prediction based on an ensemble of an artificial neural network (normality model designed at turbine level) ...

    • Mantenimiento predictivo de aerogeneradores a partir de datos de datos SCADA 

      Cusidó Roura, Jordi (2019-06)
      Article
      Accés obert
      El mantenimiento predictivo en aerogeneradores es un valor en alza. La extensión de vida es una tendencia clara del sector en la que ya están trabajando operadores como Acciona, Naturgy e Innogy, y ello requiere de un ...

    • Motor fault detection using a Rogowski sensor without an integrator 

      Poncelas, O; Rosero García, Javier Alveiro; Cusidó Roura, Jordi; Ortega Redondo, Juan Antonio; Romeral Martínez, José Luis (2009-10)
      Article
      Accés obert
      This paper presents a new approach for the current acquisition system in motor fault detection applications. This paper includes the study, design, and implementation of a Rogowski coil current sensor without the integrator ...

    • New mathematical model of an inverter-based generator for stability studies of microgrid Systems 

      Andrade Rengifo, Fabio; Romeral Martínez, José Luis; Kampouropoulos, Konstantinos; Cusidó Roura, Jordi (2013)
      Text en actes de congrés
      Accés obert
      A new mathematical model of a renewable generator, with a DC-AC interface, based on the concept of electrostatic machine is presented. This new model has a direct relationship between the DC and AC side. Moreover, it can ...

    • New model of a converter-based generator using electrostatic synchronous machine concept 

      Andrade Rengifo, Fabio; Romeral Martínez, José Luis; Cusidó Roura, Jordi; Cárdenas Araújo, Juan José (2014-06-01)
      Article
      Accés restringit per política de l'editorial
      In this paper, a new method for modeling converter-based power generators in ac-distributed systems is proposed. It is based on the concept of electrostatic synchronous machines. With this new concept, it is possible to ...

    • On-line fault detection method for induction machines based on signal convolution 

      Cusidó Roura, Jordi; Romeral Martínez, José Luis; García Espinosa, Antonio; Ortega Redondo, Juan Antonio; Riba Ruiz, Jordi-Roger (2010-06-28)
      Article
      Accés obert
      A new technique for induction motor fault detection and diagnosis is presented. This technique, which has been experimentally verified in stationary and non-stationary motor conditions, is based on the convolution of ...

    • Predicting hospital admissions to reduce crowding in the emergency departments 

      Cusidó Roura, Jordi; Comalrena, Joan; Alavi, Hamidreza; Llunas Mestres, Laia (Multidisciplinary Digital Publishing Institute, 2022-10-24)
      Article
      Accés obert
      Having an increasing number of patients in the emergency department constitutes an obstacle to the admissions process and hinders the emergency department (ED)’s ability to deal with the continuously arriving demand for ...

    • Protecció de la innovació tecnològica 

      Albiol Rodríguez, Jordi; Cusidó Roura, Jordi (Generalitat de Catalunya. CIDEM, 2009-09)
      Capítol de llibre
      Accés obert

    • Quantification of the information loss resulting from temporal aggregation of wind turbine operating data 

      Beretta, Mattia; Pelka, Karoline; Cusidó Roura, Jordi; Lichtenstein, Timo (2021-09-01)
      Article
      Accés obert
      SCADA operating data are more and more used across the wind energy domain, both as a basis for power output prediction and turbine health status monitoring. Current industry practice to work with this data is by aggregating ...

    • Recycling of sludge from drinking water treatment as ceramic material for the manufacture of tiles 

      Cremades Oliver, Lázaro Vicente; Cusidó Roura, Jordi; Arteaga, F. (2018-08-14)
      Article
      Accés obert
      Currently, the main destination for sludge from Drinking Water Treatment Plants (DWTP) is its disposal in sanitary landfills. However, its chemical composition and physical properties make it suitable for use as a building ...

    • Signal injection as a fault detection technique 

      Cusidó Roura, Jordi; Romeral Martínez, José Luis; Ortega Redondo, Juan Antonio; García Espinosa, Antonio; Riba Ruiz, Jordi-Roger (2011-03)
      Article
      Accés obert
      Double frequency tests are used for evaluating stator windings and analyzing the temperature. Likewise, signal injection on induction machines is used on sensorless motor control fields to find out the rotor position. ...

    • Stability analysis of a microgrid system based on inverter-interfaced distributed generators 

      Andrade Rengifo, Fabio; Kampouropoulos, Konstantinos; Cusidó Roura, Jordi; Romeral Martínez, José Luis (2013)
      Article
      Accés restringit per política de l'editorial
      This paper presents a phase-plane trajectory analysis and the appliance of Lyapunov´s methodology to evaluate the stability limits of a small signal model of a Microgrid system. The work done is based on a non-linear tool ...

    • Study of transient stability for parallel connected inverters in microgrid system works in stand-alone 

      Andrade Rengifo, Fabio; Cusidó Roura, Jordi; Romeral Martínez, José Luis; Cárdenas Araújo, Juan José (2011)
      Text en actes de congrés
      Accés obert
      Distributed generators systems and Microgrid are becoming more important to increase the renewable energy penetration in the public utility. This paper presents a mathematical model for connected inverters in Microgrid ...

    • Transient analysis and motor fault detection using the wavelet transform 

      Cusidó Roura, Jordi; Romeral Martínez, José Luis (INTECH, 2011-04)
      Capítol de llibre
      Accés obert

    • Transient stability analysis of inverter-interfaced distributed generators in a microgrid system 

      Andrade Rengifo, Fabio; Cusidó Roura, Jordi; Romeral Martínez, José Luis (IEEE Press. Institute of Electrical and Electronics Engineers, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper works with no-lineal tool and computer simulations, phase-plane trajectory analysis and method of Lyapunov for evaluate the limits of the small signal models and suggest to utilize models that can permit the ...

    • Wind fleet generator fault detection via SCADA alarms and autoencoders 

      Beretta, Mattia; Cárdenas Araújo, Juan José; Koch, Cosmin; Cusidó Roura, Jordi (Multidisciplinary Digital Publishing Institute, 2020-12)
      Article
      Accés obert
      A hybrid health monitoring system for wind turbine generators is introduced. The novelty of this research consists in approaching a 115-wind turbine fleet by using the fusion of multiple sources of information. Analog SCADA ...

    • Wind turbine database for intelligent operation and maintenance strategies 

      Marti-Puig, Pere; Blanco Martínez, Alejandro; Cusidó Roura, Jordi; Sole Casals, Jordi (Nature, 2024-02-29)
      Article
      Accés obert
      With the aim of helping researchers to develop intelligent operation and maintenance strategies, in this manuscript, an extensive 3-years Supervisory Control and Data Acquisition database of five Fuhrländer FL2500 2.5¿MW ...