Exploració per tema "Electric current converters"

Ara es mostren els items 21-40 de 547

    • A novel high step-up secondary side impedance source full-bridge converter 

      Salehi, Navid; Martínez García, Herminio; Velasco Quesada, Guillermo (International Centre for Numerical Methods in Engineering (CIMNE), 2018)
      Text en actes de congrés
      Accés obert
      In order to suppress the voltage stress of semiconductor devices, and solve the reverse recovery problem of diodes by decreasing the duty cycle of switches, impedance source converters could be consider as a solution. In ...

    • A novel robust sliding mode controller for Half-bridge converter 

      Hang, Lijun; Liu, Sensen; Lu, Zhengyu; Castilla Fernández, Miguel (2010)
      Comunicació de congrés
      Accés obert
      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 ...

    • A photovoltaic three-phase topology to reduce common mode voltage 

      Vázquez Guzmán, Gerardo; Kerekes, Tamas; Rocabert Delgado, Joan; Rodríguez Cortés, Pedro; Teodorescu, Remus; Aguilar, Daniel (2010)
      Text en actes de congrés
      Accés obert
      At the present time most of the photovoltaic (PV) applications require to be integrated to the electrical grid. There are mainly two types of PV systems: with galvanic isolation (transformer) and transformerless. PV ...

    • A proportional resonant controller tuning method for grid connected power converters with LCL+trap filter 

      Zhang, Weiyi; Mir Cantarellas, Antonio; Remón, D.; Luna Alloza, Álvaro; Rodríguez Cortés, Pedro (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Three-phase power converters are largely employed in power generation facilities based on renewable energy sources, and these converters commonly working in grid connection mode are frequently connected to the grid through ...

    • A regenerative active clamp circuit for DC/AC converters with high-frequency isolation in photovoltaic systems 

      Rocabert Delgado, Joan; Mata Dumenjó, Montserrat; Bordonau Farrerons, José; Beristain Gimenez, Jose Antonio (2004-11-15)
      Comunicació de congrés
      Accés obert
      DC/AC converters with high-frequency isolation and bidirectional power flow are extensively used in photovoltaic power systems and small isolated power converters at low and medium power ranges. The main disadvantages ...

    • A relay controller with parallel feed-forward compensation for a buck converter feeding constant power loads 

      Rafiezadeh, Roya; Griñó Cubero, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés obert
      A simple and efficient analog direct voltage control design for improving the performance and stability of a buck converter feeding constant power loads (CPLs) is the main aim of this article. One of the oldest and most ...

    • A robust grid current controller with grid harmonic and filter resonance damping capabilities using a closed-loop admittance shaping 

      Perez Morales, Jorge; Cóbreces Álvarez, Santiago; Wang, Xiongfei; Blaabjerg, Frede; Griñó Cubero, Robert (IEEE Press, 2017)
      Text en actes de congrés
      Accés obert
      This paper presents a grid current control of a grid connected Voltage Source Converter (VSC) with an LCL filter. The control method enables to shape the input admittance of the converter in addition to track a given current ...

    • A simple control strategy to increase the total efficiency of multi-converter systems 

      Hoff Dupont, Fabrício; Zaragoza Bertomeu, Jordi; Rech, Cassiano; Pinheiro, José Renes (2013)
      Text en actes de congrés
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      This paper presents a simple control strategy that is employed together with an optimization methodology to achieve optimal efficiency in systems composed by multiple parallel converters. An external loop is responsible ...

    • A simple method for reducing THD and improving the efficiency in CSI topology based on SiC power devices 

      Fernández Palomeque, Efrén Esteban; Paredes, Alejandro; Sala Caselles, Vicenç; Romeral Martínez, José Luis; Sala, Vicent; Paredes, Alejandro (2018-10-17)
      Article
      Accés obert
      Silicon carbide (SiC)-based switching devices provide significant performance improvements in many aspects, including lower power dissipation, higher operating temperatures, and faster switching; compared with conventional ...

    • A simple switching frequency regulated sliding mode controller for a VSI with a full digital implementation 

      Repecho del Corral, Víctor; Biel Solé, Domingo; Olm Miras, Josep Maria (Institute of Electrical and Electronics Engineers (IEEE), 2020-01-06)
      Article
      Accés obert
      This paper describes the design of a first order sliding mode controller for a VSI operating at fixed switching frequency. The proposal is simple, as it does not include any integral or resonant action in the switching ...

    • A simulation study of proportional resonant controller based on the implementation of frequency-adaptive virtual flux estimation with the LCL filter 

      Roslan, Nurul Fazlin; Suul, Jon Are; Luna Alloza, Álvaro; Candela García, José Ignacio; Rodríguez Cortés, Pedro (2015)
      Text en actes de congrés
      Accés obert
      This paper discusses the implementation of proportional resonant (PR) current controllers for a Voltage Source Converter (VSC) with LCL filter which is synchronized to the grid by virtual flux (VF) estimation with inherent ...

    • A stationary reference frame grid synchronization system for three-phase grid-connected power converters under adverse grid conditions 

      Rodríguez Cortés, Pedro; Luna Alloza, Álvaro; Muñoz Aguilar, Raúl Santiago; Etxebarría, Ion; Teodorescu, Remus; Blaabjerg, Frede (2012-01)
      Article
      Accés restringit per política de l'editorial
      Grid synchronization algorithms are of great importance in the control of grid-connected power converters, as fast and accurate detection of the grid voltage parameters is crucial in order to implement stable control ...

    • A survey on capacitor voltage control in neutral-point-clamped multilevel converters 

      Alepuz Menéndez, Salvador; Busquets Monge, Sergio; Nicolás Apruzzese, Joan; Filbà Martínez, Àlber; Bordonau Farrerons, José; Yuan, Xiaoyan; Kouro, Samir (2022-02-10)
      Article
      Accés obert
      Neutral-point-clamped multilevel converters are currently a suitable solution for a wide range of applications. It is well known that the capacitor voltage balance is a major issue for this topology. In this paper, a brief ...

    • A three-phase active rectifier topology for bipolar DC Ddstribution 

      Junyent Ferré, Adrià; Rodríguez Bernuz, Joan Marc (Institute of Electrical and Electronics Engineers (IEEE), 2018-02)
      Article
      Accés obert
      A new three-phase active rectifier topology is proposed for bipolar dc distribution, which can achieve the independent dc-pole control, with only one two-level voltage source converter and an ac-side grounding inductor. ...

    • A three-phase frequency-adaptive phase-locked loop for independent single-phase operation 

      Mirhosseini, Mitra; Pou Félix, Josep; Agelidis, Vassilios; Robles Sestafe, Eider; Ceballos Recio, Salvador (2014-12-01)
      Article
      Accés restringit per política de l'editorial
      This letter proposes a phase-locked loop (PLL) able to operate as an independent single-phase PLL in the context of three-phase systems. Its key advantage is that the extracted information allows the independent control ...

    • A unified analytical model for characterization of cable faults in VSC DC systems 

      Mesas García, Juan José; Monjo Mur, Lluís; Sainz Sapera, Luis; Pedra Durán, Joaquim (2015)
      Text en actes de congrés
      Accés obert

    • A unified current loop tuning approach for grid-connected photovoltaic inverters 

      Zhang, Weiyi; Remón Rodríguez, Daniel; Mir Cantarellas, Antonio; Rodríguez Cortés, Pedro (2016-09-01)
      Article
      Accés obert
      High level penetration of renewable energy sources has reshaped modern electrical grids. For the future grid, distributed renewable power generation plants can be integrated in a larger scale. Control of grid-connected ...

    • A Versatile workbench simulator: Five-phase inverter and PMa-SynRM performance evaluation 

      Acosta Cambranis, Fernando Geovany; Zaragoza Bertomeu, Jordi; Romeral Martínez, José Luis; Michalski, Tomasz Dobromir; Pou Muñoz, Viàtor (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés obert
      Thispaperpresents the design and structure of aversatileworkbench simulator forevaluating the performance of a five-phase inverter andPermanent Magnet assisted Synchronous Reluctance Motor(PMa-SynRM). The simulatorallows ...

    • A very low distortion high efficiency class-F power amplifier at 900 MHz. 

      Gilasgar, Mitra; Barlabe Dalmau, Antoni; Pradell i Cara, Lluís (2013)
      Text en actes de congrés
      Accés obert
      This paper presents a novel class - F power amplifier for mobile applications in which with a proper harmonic tuning structure the need f or an extra fil tering section is eliminated . A class - F ...

    • A way of increasing stability margin of current control in VSCs connected to the grid through LCL filters 

      Marín Arévalo, Leonardo Vidal; Rodríguez Cortés, Pedro; Candela García, José Ignacio; Rocabert Delgado, Joan (2017)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      VSCs connected to the grid through LCL filters are common in the integration of renewable energies into electrical systems. Therefore, in this paper small signal stability of the current loop of this configuration is ...