Exploració per tema "Voltage control"

Ara es mostren els items 20-39 de 42

    • LDO–assisted vs. linear–assisted DC/DC converters: a comprehensive study and comparison 

      Shirmohammadli, V.; Saberkari, Alireza; Martínez García, Herminio; Alarcón Cot, Eduardo José (Institute of Electrical and Electronics Engineers (IEEE), 2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper deals with a comprehensive study and comparison on the conventional linear-assisted converter and a new structure named, LDO-assisted converter based on a new class-AB LDO regulator instead of the conventional ...

    • MCU controlled DC-DC Buck/Boost converter for supercapacitors 

      Querol Borràs, Jorge (Universitat Politècnica de Catalunya / KTH Royal Institute of Technology, 2012-07-02)
      Projecte/Treball Final de Carrera
      Accés obert
      Realitzat a/amb:   Kungliga Tekniska högskolan
      [ANGLÈS] This work is focused on DC to DC conversion, what is a crucial function to enable the use of supercapacitors for energy storage. A theoretical study and comparison of methods, algorithms and techniques for software ...

    • Modulation and capacitor voltage balancing control of multilevel NPC dual active bridge DC-DC Converters 

      Filbà Martínez, Àlber; Busquets Monge, Sergio; Bordonau Farrerons, José (Institute of Electrical and Electronics Engineers (IEEE), 2020-04-01)
      Article
      Accés obert
      The present paper provides a solution to operate multilevel dual active bridge (ML-DAB) converters built upon neutral point clamped switching legs in a full-bridge disposition and with any number of levels on either side ...

    • Multi input sliding mode control of an autonomous fuel cell-supercapacitor hybrid system 

      Moré, Jerónimo José; Puleston, Paul; Kunusch, Cristian; Fossas Colet, Enric (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents the design of a sliding mode control strategy through an input decoupling of an hybrid fuel cell based system. The hybrid system is composed by a fuel cell stack and a Supercapacitors module, connected ...

    • Multilevel two quadrant DC/DC converter for regenerative braking in mobile applications 

      Massot Campos, Miquel; Montesinos Miracle, Daniel; Galceran Arellano, Samuel; Rufer, Alfred (2011)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      In this paper different cascaded and multilevel topologies are compared for regenerative braking systems using supercapacitors (SC). It shows that the multilevel buck derived topology can beneficiate from both reduced ...

    • Multiwideband terahertz communications via tunable graphene-based metasurfaces in 6G networks: Graphene enables ultimate multiwideband THz wavefront control 

      Taghvaee, Hamidreza; Pitilakis, Alexandros; Tsilipakos, Odysseas; Tasolamprou, Anna; Kantartzis, Nikolaos V.; Kafesaki, Maria; Cabellos Aparicio, Alberto; Alarcón Cot, Eduardo José; Abadal Cavallé, Sergi (Institute of Electrical and Electronics Engineers (IEEE), 2022-06)
      Article
      Accés obert
      The next generation of wireless networks is expected to tap into the terahertz (THz) band (0.1–10 THz) to satisfy the extreme latency and bandwidth density requirements of future applications. However, the development of ...

    • Overview of power processing structures for embedding energy storage in PV power converters 

      Citro, Costantino; Luna Alloza, Álvaro; Rocabert Delgado, Joan; Muñoz Aguilar, Raúl Santiago; Candela García, José Ignacio; Rodríguez Cortés, Pedro (IEEE Computer Society Publications, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The level of penetration of grid-connected photovoltaic (PV) systems has grown very quickly in recent years. Nonetheless, network stresses related to the recurrent voltage and frequency oscillations caused by their irregular ...

    • Pairing grid-forming VSC filter topologies with voltage control structures 

      Girona Badia, Jaume; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol (Elsevier, 2024-01)
      Article
      Accés obert
      This paper focuses on the voltage control of grid-forming Voltage Source Converters (VSCs) connected to AC networks. The work aims to identify the best pairing between voltage control structures and usual ac filter topologies. ...

    • Parameter-independent battery control based on series and parallel impedance emulation 

      Urtasun, Andoni; Sanchis Gúrpide, Pablo; Guinjoan Gispert, Francisco; Marroyo Palomo, Luis (Institute of Electrical and Electronics Engineers (IEEE), 2019-05-29)
      Article
      Accés obert
      Appropriate voltage control is essential in order to extend the useful life of a battery. However, when universal chargers are used, the design of this control becomes more complicated, given the fact that the battery ...

    • Phasor modeling approaches and simulation guidelines of voltage-source converters in grid-integration studies 

      Albernaz Lacerda Freitas, Vinícius; Prieto Araujo, Eduardo; Cheah Mañé, Marc; Gomis Bellmunt, Oriol (Institute of Electrical and Electronics Engineers (IEEE), 2022-05-13)
      Article
      Accés obert
      With the large integration of converter-interfaced generation (CIG) and widespread of power electronic interfaced technologies, power system dynamic behaviour is becoming progressively faster. As a consequence, is often ...

    • PI-based controller for low-power distributed inverters to maximise reactive current injection while avoiding over voltage during voltage sags 

      Miret Tomàs, Jaume; Garnica López, Miguel Andrés; Castilla Fernández, Miguel; García de Vicuña Muñoz de la Nava, José Luis; Camacho Santiago, Antonio (2018-10-25)
      Article
      Accés obert
      In the recently deregulated power system scenario, the growing number of distributed generation sources should be considered as an opportunity to improve stability and power quality along the grid. To make progress in this ...

    • Positive and Negative Sequence Control Strategies to Maximize the Voltage Support in Resistive-Inductive Grids During Grid Faults 

      Camacho Santiago, Antonio; Castilla Fernández, Miguel; Miret Tomàs, Jaume; García de Vicuña Muñoz de la Nava, José Luis; Guzmán Solà, Ramon (2017-07-27)
      Article
      Accés obert
      Grid faults are one of the most severe perturbations in power systems. During these extreme disturbances, the reliability of the grid is compromised and the risk of a power outage is increased. To prevent this issue, ...

    • Remote multi-nodal voltage unbalance compensation in islanded AC microgrids 

      Duarte Mejia, Josue Neftali; Velasco García, Manel; Martí Colom, Pau; Borrell Sanz, Ángel; Castilla Fernández, Miguel (Institute of Electrical and Electronics Engineers (IEEE), 2024-03)
      Article
      Accés restringit per política de l'editorial
      Microgrids (MG) are exposed to voltage quality deterioration due to the presence of voltage unbalance. To deal with this problem, existing solutions based on Distributed Generation (DG) units interfaced by power electronics ...

    • Robust repetitive control of power inverters for standalone operation in DG systems 

      Ramos Fuentes, German A.; Costa Castelló, Ramon; Isaza Ruget, Ricardo (2020-03-01)
      Article
      Accés obert
      Standalone operation of an inverted-based distributed generation unit is performed in voltage control mode. In this mode, it is important that the controller provides tracking and rejection of periodic signals. Strategies ...

    • Secondary switched control with no communications for islanded microgrids 

      Rey, Juan M; Martí Colom, Pau; Velasco García, Manel; Miret Tomàs, Jaume; Castilla Fernández, Miguel (Institute of Electrical and Electronics Engineers (IEEE), 2017-05-12)
      Article
      Accés obert
      Flexibility and reliability of AC microgrids are enhanced by reducing the dependence on communications in multi-layer hierarchical control. In this sense, this paper presents a secondary control with no communications for ...

    • Series interline DC/DC current flow controller for meshed HVDC grids 

      Sau Bassols, Joan; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol; Hassan, Fainan (2017-07-30)
      Article
      Accés restringit per política de l'editorial
      This paper proposes a DC/DC Current Flow Controller (CFC) for meshed High Voltage Direct Current (HVDC) grids. The CFC has the advantage of a simplified structure that allows to use minimum number of switches when ...

    • Sliding mode control of LCL full-bridge rectifiers 

      Dòria Cerezo, Arnau; Biel Solé, Domingo; Fossas Colet, Enric (2016-07-01)
      Capítol de llibre
      Accés restringit per política de l'editorial
      In control theory, sliding mode control, or SMC, is a nonlinear control method that alters the dynamics of a nonlinear system by application of a discontinuous control signal that forces the system to "slide" along a ...

    • Sliding-mode control for a three-phase unity power factor rectifier operating at fixed switching frequency 

      Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Morales López, Javier; Castilla Fernández, Miguel; Matas Alcalá, José (2015-02-11)
      Article
      Accés obert
      This paper presents an improved variable hysteresisband current-control in natural frame for a three-phase unity power rectifier. The proposed control algorithm is based on three decoupled sliding-mode controllers combined ...

    • Small signal stability analysis of offshore AC network having multiple VSC-HVDC system 

      Raza, Muhammad; Prieto Araujo, Eduardo; Gomis Bellmunt, Oriol (2017-07-11)
      Article
      Accés restringit per política de l'editorial
      This article presents a small signal analysis of an offshore AC network to integrate offshore wind energy with the main AC grid at shore through more than one VSC-HVDC transmission system. The offshore AC network reference ...

    • Techno-economic assessment of flexibility options versus grid expansion in distribution grids 

      Resch, Matthias; Bühler, Jochen; Schachler, B.; Sumper, Andreas (2021-01-01)
      Article
      Accés obert
      In this paper five different flexibility options are analysed from a techno-economic perspective as alternatives to traditional grid expansion for a specific distribution grid in Germany. The options are: two reactive power ...