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Ara es mostren els items 249-268 de 344

    • New control strategy to allow the photovoltaic systems operation under grid faults 

      Azevedo, Gustavo M.S.; Rodríguez Cortés, Pedro; Cavalcanti, Marcelo C.; Vázquez Guzmán, Gerardo; Neves, F. (2009)
      Comunicació de congrés
      Accés obert
      This paper presents a new control strategy that allows the photovoltaic system operation under grid faults without overcurrent and assuring grid sinusoidal currents. The current limiter is made indirectly by using an ...

    • Novel analytical method for dynamic design of renewable SSG SPC unit to mitigate low-frequency electromechanical oscillations 

      Abdollahi, Mostafa; Candela García, José Ignacio; Rocabert Delgado, Joan; Atef Abbas Elsaharty, Mohamed; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2020-07)
      Article
      Accés obert
      Grid operators require grid connected RGUs to provide specific dynamic features. RGUs must support dynamic performance of grid and operate in such a way to ward off new issues in grid. Recently, unfavorable oscillatory ...

    • Optimal economic exploitation of hydrogen based grid-friendly zero energy buildings 

      Milo, Aitor; Gaztañaga, Haizea; Etxeberria Otadui, Ion; Bacha, Seddik; Rodríguez Cortés, Pedro (2011-01)
      Article
      Accés restringit per política de l'editorial
      This paper presents economically optimized energy and power management strategies for grid-friendly hydrogen based Zero Energy Buildings (ZEBs). The proposed energy management strategy is an adaptative optimization-based ...

    • Optimization of an experimental hybrid microgrid operation: reliability and economic issues 

      Milo, Aitor; Gaztañaga, Haizea; Etxeberria Otadui, Ion; Bilbao, Endika; Rodríguez Cortés, Pedro (2009)
      Text en actes de congrés
      Accés obert
      In this paper a hybrid microgrid system, composed of RES (Renewable Energy System) and CHP (Combined Heat and Power) systems together with a battery based storage system is presented. The microgrid is accompanied by a ...

    • Optimized control of multi-terminal DC grids using particle swarm optimization 

      Rouzbehi, Kumars; Miranian, Arash; Luna Alloza, Álvaro; Rodríguez Cortés, Pedro (2015-10-29)
      Article
      Accés obert
      The electric networks of the future will make an extensive use of DC grids. Therefore, the control of Multi-terminal DC (MTDC) grids is a key issue, which is gathering the attention of the industry and the research community. ...

    • Optimized control of multi-terminal DC GridsUsing particle swarm optimization 

      Rouzbehi, Kumars; Miranian, Arash; Luna Alloza, Álvaro; Rodríguez Cortés, Pedro (2013)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      This paper addresses the important issue of Multi-Terminal DC (MTDC) grid control strategy based on the particle swarm optimization (PSO) technique. The MTDC grid is controlled by the concept of vector control, in which ...

    • Overview of FACTS devices for wind power plants directly connected to the transmission network 

      Adamczyk, A.; Teodorescu, Remus; Mukerjee, R. N.; Rodríguez Cortés, Pedro (2010)
      Text en actes de congrés
      Accés obert
      In this paper state-of-the-art in FACTS for WPPs with AC connection is given. FACTS devices with their properties are described. HVDC, which in literature is also often recognized as FACTS device, is out of this paper ...

    • Overview of intelligent substation automation in distribution systems 

      Nieto, Juan Diego; Remón, D.; Mir Cantarellas, Antonio; Koch-Ciobotaru, Cosmin; Rodríguez Cortés, Pedro (2015)
      Text en actes de congrés
      Accés obert
      New trends in electricity production, that involve generating power locally at the distribution voltage level by using renewable energy sources, are changing the paradigm of the distribution network, giving it an active ...

    • 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 ...

    • Overview of recent grid codes for wind power integration 

      Altin, M.; Goksu, O.; Teodorescu, Remus; Rodríguez Cortés, Pedro; Bak-Jensen, Birgitte; Helle, L. (2010)
      Text en actes de congrés
      Accés obert
      As wind power penetration level increases, power system operators are challenged by the penetration impacts to maintain reliability and stability of power system. Therefore, grid codes are being published and continuously ...

    • Overview of the energy storage systems for wind power integration enhancement 

      Swierczynski, M.; Teodorescu, Remus; Rasmunssen, C. N.; Rodríguez Cortés, Pedro; Vikelgaard, H. (2010)
      Text en actes de congrés
      Accés obert
      This paper deals with state of the art of the Energy Storage (ES) technologies and their possibility of accommodation for wind turbines. Overview of ES technologies is done in respect to its suitability for Wind Power ...

    • Parameterization of a synchronous generator to represent a doubly fed induction generator with chopper protection for fault studies 

      Martínez Navarro, Jorge; Kjaer, P. C.; Rodríguez Cortés, Pedro; Teodorescu, Remus (2010-06-28)
      Article
      Accés restringit per política de l'editorial
      This paper addresses the representation of the wound rotor asynchronous generators by an equivalent synchronous generator, valid for short circuit current calculations. Modern wind power plants are required and designed ...

    • Partial shadowing detection based on equivalent thermal voltage monitoring for PV module diagnostics 

      Sera, Dezso; Teodorescu, Remus; Rodríguez Cortés, Pedro (2009)
      Text en actes de congrés
      Accés obert
      Partial shadowing of photovoltaic systems can overproportionally reduce the energy yield and lead to early ageing and failure of the shadowed cells. Large area shadows are relatively easy to detect due to the eminent ...

    • Performance analysis of conventional PSS and fuzzy controller for damping power system oscillations 

      Banna, Hasan UI; Luna Alloza, Álvaro; Rodríguez Cortés, Pedro; Cabrera Tobar, Ana; Ghorbani, Hamidreza; Ying, Shaoqing (2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Electro-mechanical oscillations are produced, in the machines of an interconnected power network, followed by a disturbance or due to high power transfer through weak tie lines. These oscillations should be damped as quickly ...

    • Performance improvement of the droop control for single-phase inverters 

      Azevedo, Gustavo M.S.; Calvancanti, M; Neves, F.; Rodríguez Cortés, Pedro; Rocabert Delgado, Joan (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The droop control uses the local average values of the active and reactive power components for sharing the load power demand among inverters in parallel. In this paper, a method that uses a virtual quadrature reference ...

    • Posicast control: a novel approach to mitigate multi-machine power system oscillations in presence of wind farm 

      Ghorbani, Hamidreza; Candela García, José Ignacio; Luna Alloza, Álvaro; Rodríguez Cortés, Pedro (Institute of Electrical and Electronics Engineers (IEEE), 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper, application of Posicast control method to generator excitation system is presented. The method is one of the simplest possible control design methods that can be applied to damp the oscillations caused by ...

    • Power capability investigation based on electrothermal models of press-pack IGBT three-level NPC and ANPC VSCs for multimegawatt wind turbines 

      Senturk, Osman S.; Helle, Lars; Rodríguez Cortés, Pedro; Munk-Nielsen, Stig; Teodorescu, Remus (2012-07)
      Article
      Accés restringit per política de l'editorial
      Wind turbine power capability is an essential set of data for both wind turbine manufacturers/operators and transmission system operators since the power capability determines whether a wind turbine is able to fulfill ...

    • Power control of VSC HVDC converters for limiting the influence of ac unbalanced faults on multi-terminal DC grids 

      Suul, Jon Are; Luna Alloza, Álvaro; Rodríguez Cortés, Pedro (2010)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      It will be important for the operation of future multi-terminal HVDC systems that each converter unit is capable of limiting the influence of nearby AC faults on the DC grid. Thus, the local control systems at each terminal ...

    • Power delivery in multiterminal VSC-HVDC transmission system for offshore wind power applications 

      da Silva, Rodrigo; Teodorescu, Remus; Rodríguez Cortés, Pedro (2010)
      Text en actes de congrés
      Accés obert
      This paper deals with one of the challenges in the field of offshore wind power systems: power transmission among the wind farms and the land when there is more than one AC grid to be considered. This case is known in ...

    • Power density investigation on the press-pack IGBT 3L-HB-VSCs applied to large wind turbines 

      Senturk, Osman S.; Munk-Nielsen, Stig; Teodorescu, Remus; Helle, L.; Rodríguez Cortés, Pedro (IEEE, 2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      With three different DC-side and AC-side connections, the three-level H-bridge voltage source converters (3L-HB-VSCs) are alternatives to 3L neutral-point-clamped VSCs (3L-NPC-VSCs) for interfacing large wind turbines ...