Now showing items 1-20 of 99

    • A communication-less control scheme for a variable air-gap wireless energy transfer system using current source resonant converter 

      Ghahderijani, Mohammad Moradi; Castilla Fernández, Miguel; Rey López, Juan Manuel; Torres Martínez, Javier; Garnica López, Miguel Andrés (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      This paper presents a robust control method for wireless energy transfer systems using current source resonant converter without any communication network. The proposed control strategy is valid even for systems with ...
    • A novel electricity price forecasting approach based on dimension reduction strategy and rough artificial neural networks 

      Jahangir, Hamidreza; Tayarani, Hanif; Baghali, Sina; Ahmadian, Ali; Elkamel, Ali; Golkar, Masoud Aliakbar; Castilla Fernández, Miguel (2020-04-01)
      Article
      Restricted access - publisher's policy
      An accurate electricity price forecasting (EPF) plays a vital role in the deregulated energy markets and has a specific effect on optimal management of the power system. Considering all the potent factors in determining ...
    • A novel robust sliding mode controller for Half-bridge converter 

      Hang, Lijun; Liu, Sensen; Lu, Zhengyu; Castilla Fernández, Miguel (2010)
      Conference lecture
      Open Access
      This paper proposes one novel sliding mode controller for the Half-bridge converter to reduce the line and load disturbance. Based on the bilinear model of the Half-bridge DC/DC converter, the small signal model and the ...
    • Active and reactive power strategies with peak current limitation for distributed generation inverters during unbalanced grid faults 

      Camacho Santiago, Antonio; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Borrell Sanz, Angel; García de Vicuña Muñoz de la Nava, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2015-03-01)
      Article
      Open Access
      Distributed generation inverters have become a key element to improve grid efficiency and reliability, particularly during grid faults. Under these severe perturbations, inverter-based power sources should accomplish ...
    • Active damping control for a three phase grid-connected inverter using sliding mode control 

      Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Camacho Santiago, Antonio; Matas Alcalá, José; Castilla Fernández, Miguel; Miret Tomàs, Jaume (2013)
      Conference report
      Restricted access - publisher's policy
      This paper proposes a ne w active damping method based on virtual resistors for three-phase grid connected voltage source inverters (VSI) with LCL filter. The use of this filters is a standard solution to provide the ...
    • Adaptive sliding-mode control for a multiple-user inductive power transfer system without need for communication 

      Van Der Pijl, Frank F. A; Castilla Fernández, Miguel; Bauer, Pavol T. (IEEE Press. Institute of Electrical and Electronics Engineers, 2012-09-06)
      Article
      Restricted access - publisher's policy
      A complicating aspect in the control design of resonant inductive power transfer systems is the absence of a direct communication link between primary and (multiple) secondary system sides. This paper introduces a new ...
    • Adaptive slope voltage control for distributed generation inverters with improved transient performance 

      Rey Lopez, Juan Manuel; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Camacho Santiago, Antonio; Guzmán Solà, Ramon (2019-04-09)
      Article
      Restricted access - publisher's policy
      Reactive power injection in distributed generation inverters is an useful ancillary service for grid supporting purposes. For grid-feeding converters, the slope control method is the most common voltage regulation strategy ...
    • Aggregated economic analysis of the brazilian electricity distribution companies using a regulated market economic model 

      Cortez, Carolina; Bonatto, Benedito Donizeti; Arango, Héctor; Castilla Fernández, Miguel (Springer, 2020-03-29)
      Article
      Restricted access - publisher's policy
      While most of the research work in the field of electrical engineering was aroused by the scientific challenges to be overcome, it is fair to recognize that the practical importance of engineering hinges on its economic ...
    • An adaptive prefiltering method to improve the speed/accuracy tradeoff of voltage sequence detection methods under adverse grid conditions 

      Matas Alcalá, José; Castilla Fernández, Miguel; Miret Tomàs, Jaume; García de Vicuña Muñoz de la Nava, José Luis; Guzmán Solà, Ramon (Institute of Electrical and Electronics Engineers (IEEE), 2013-07-23)
      Article
      Restricted access - publisher's policy
      This paper deals with the improvement of the transient response and harmonic, subharmonic, and dc-offset voltage rejection capability of a grid voltage sequence detection scheme based on a second-order generalized integrator ...
    • Analysis of consensus-based islanded microgrids subject to unexpected electrical and communication partitions 

      Rosero Chandi, Carlos Xavier; Velasco García, Manel; Martí Colom, Pau; Camacho Santiago, Antonio; Miret Tomàs, Jaume; Castilla Fernández, Miguel (Institute of Electrical and Electronics Engineers (IEEE), 2018-01-01)
      Article
      Open Access
      Microgrids are power systems consisting of an electrical network composed by distributed loads and generation units that may include a communication network for improved operation. The considered microgrid in islanded mode ...
    • Analysis of the effect of clock drifts on frequency regulation and power sharing in inverter-based islanded microgrids 

      Martí Colom, Pau; Torres Martínez, Javier; Rosero, Carlos Xavier; Velasco García, Manel; Miret Tomàs, Jaume; Castilla Fernández, Miguel (2018-02-12)
      Article
      Open Access
      Local hardware clocks in physically distributed computation devices hardly ever agree because clocks drift apart and the drift can be different for each device. This paper analyses the effect that local clock drifts have ...
    • Analysis, design and implementation of a DC/DC boost resonant-inductor converter with sliding-mode control 

      Moradi Ghahderijani, Mohammad; Castilla Fernández, Miguel; Momeneh, Arash; Miret Tomàs, Jaume; García de Vicuña Muñoz de la Nava, José Luis (2018-03-20)
      Article
      Open Access
      Modern DC-DC resonant converters are normally build around a voltage-source series-resonant converter. This study aims to facilitate the practical use of current-source parallel-resonant converters due to their outstanding ...
    • Analysis, design and implementation of a residential inductive contactless energy transfer system with multiple mobile clamps 

      Momeneh, Arash; Castilla Fernández, Miguel; Moradi Ghahderijani, Mohammad; Miret Tomàs, Jaume; García de Vicuña Muñoz de la Nava, José Luis (2017-06-30)
      Article
      Open Access
      This study presents the analysis, design and implementation of a simple and cost-effective residential inductive contactless energy transfer system with multiple mobile clamps. The topology is based on the cascaded connection ...
    • Architecture and design of an inductive contactless energy transfer system with two mobile loads for residential applications 

      Momeneh, Arash; Castilla Fernández, Miguel; van der Pijl, Fredrik F.A.; Guzmán Solà, Ramon; Morales López, Javier (2015)
      Conference lecture
      Restricted access - publisher's policy
      Inductive contactless energy transfer systems with multiple mobile loads are very complex systems. Main challenges of these systems are to propose a suitable architecture and to design their power components. These ...
    • Avoiding overvoltage problems in three-phase distributed-generation systems during unbalanced voltage sags 

      Castilla Fernández, Miguel; Camacho Santiago, Antonio; Miret Tomàs, Jaume; Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis (2020-02-01)
      Article
      Open Access
      During voltage sags, distributed generation systems must fulfil specific grid-code requirements for reactive current injection. This ancillary service can produce overvoltage problems in networks operating in unbalanced ...
    • Circuits electrònics bàsics : problemes resolts 

      Sánchez García, Antonio Francisco; Castilla Fernández, Miguel (Edicions UPC, 1998)
      Book
      Restricted access to the UPC academic community
      Aquest llibre presenta una col·lecció de problemes resolts sobre circuits limitadors, circuits rectificadors, circuits reguladors amb zener, circuits de polarització de transistors, circuits d'amplificadors amb un transistor, ...
    • Communication-aware consensus for frequency restoration in islanded microgrids 

      Martí Colom, Pau; Velasco García, Manel; Martín Rull, Enric Xavier; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Camacho Santiago, Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Conference report
      Restricted access - publisher's policy
      MicroGrids (MGs) include spatially distributed generation (DG) systems and loads that may require operating autonomously in islanded mode. The operation of islanded MGs can benefit from consensus theory and practice, ...
    • Comparative study of reactive power control methods for photovoltaic inverters in low-voltage grids 

      Momeneh, Arash; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Martí Colom, Pau; Velasco García, Manel (2016-03-01)
      Article
      Open Access
      The increasing installation of photovoltaic panels in low-voltage grids causes an over voltage problem, especially during high production and low consumption periods. Generally the over voltage problem is overcome by ...
    • Consensus for active power sharing and frequency restoration in islanded microgrids subject to drifting clocks 

      Rosero Chandi, Carlos Xavier; Martí Colom, Pau; Velasco García, Manel; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Camacho Santiago, Antonio (Institute of Electrical and Electronics Engineers (IEEE), 2017)
      Conference report
      Restricted access - publisher's policy
      The application of consensus theory in the control of islanded microgrids (MG) is gaining increased attention because it facilitates the development of distributed control solutions. In particular, its application to active ...
    • Control design for multiphase synchronous buck converters based on exact constant resistive output impedance 

      Borrell Sanz, Angel; Castilla Fernández, Miguel; Miret Tomàs, Jaume; Matas Alcalá, José; García de Vicuña Muñoz de la Nava, José Luis (Institute of Electrical and Electronics Engineers (IEEE), 2013-11)
      Article
      Restricted access - publisher's policy
      This paper describes a control design methodology based on output impedance analysis for multiphase synchronous buck converters. This design leads to an optimal output voltage transient response. Two design alternatives ...