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Mostrando ítems 21-40 de 45

    • Hourly solution of voltage constraints in the Spanish electricity market. 

      Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Gómez San Román, Tomás; Echavarren Cerezo, Francisco; Navarrete Fernández, María Luisa; Casanova Lafarga, Rosa; López Camino, Gerardo (Sin editorial (Toronto, Canadá), 2003-07-13)
      The solution of voltage constraints in each hourly scenario of the Spanish electricity market must take into account: (a) the connection of off-line units (considering the active and reactive power injection effect), (b) ...

    • Impact of converter losses on the optimal power flow solution of hybrid networks based on VSC-MTDC 

      Zhao, Quanyu; García González, Javier; Gomis Bellmunt, Oriol; Prieto Araujo, Eduardo; Echavarren Cerezo, Francisco (2017-10-01)
      This paper studies the impact of Voltage Source Converter (VSC) losses on the solution of the Optimal Power Flow (OPF) of hybrid ACDC systems with a multi-terminal configuration. The motivation of this analysis is that the ...

    • Impact of demand-side management on transmission networks 

      González García, Alezeia; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Lobato Miguélez, Enrique (APDEE, AEDIE (Ponta Delgada, Portugal), 2011-06-30)
      DSM is the set of techniques which aim to introduce more efficiency in a power system by means of direct or indirect actions taken on demand, minimizing their impact on consumption utility and the quality of supply. This ...

    • Island power systems 

      Sigrist, Lukas; Lobato Miguélez, Enrique; Echavarren Cerezo, Francisco; Egido Cortés, Ignacio; Rouco Rodríguez, Luis (CRC Press (Boca Ratón, Estados Unidos de América), 2016-11-29)

    • Linear power flow algorithm with losses for multi-terminal VSC ACDC power systems 

      Fernández Pérez, José Carlos; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis (2022-05-01)
      Power flow analysis is a key tool for planning, operation and control of power systems. With future hybrid Supergrids in mind, a wide variety of power flow algorithms for multi-terminal VSC ACDC systems have been proposed. ...

    • Modeling of steady state fault current contribution of inverter-connected generation 

      Sigrist, Lukas; Renedo Anglada, Javier; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis
      This paper presents a new method to model the steady state fault current contribution of inverter?connected generation such as type 4 wind and PV generators during three?phase shortcircuits. The proposed method is based ...

    • Modeling of steady state fault current contribution of inverter-connected generation in PSSe 

      Sigrist, Lukas; Renedo Anglada, Javier; Echavarren Cerezo, Francisco; Pérez Thoden, Francisco José; Rouco Rodríguez, Luis
      This paper presents a method to model steady state fault current contribution of inverter-connected generation such as type 4 wind and PV generators or battery energy storage systems (BESS) in commercially available software ...

    • Modeling of steady state fault current contribution of inverter-connected generation in PSSe 

      Sigrist, Lukas; Renedo Anglada, Javier; Echavarren Cerezo, Francisco; Pérez Thoden, Francisco José; Rouco Rodríguez, Luis (Institute of Electrical and Electronics Engineers Power and Energy Society; Universidad Pontificia C (Madrid, España), 2021-07-29)
      This paper presents a method to model steady state fault current contribution of inverter-connected generation such as type 4 wind and PV generators or battery energy storage systems (BESS) in commercially available software ...

    • On the assignment of voltage control ancillary service of generators in Spain 

      Lobato Miguélez, Enrique; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis (2007-02-01)
      The aim of the Spanish voltage control ancillary service is the minimization of the transmission losses while keeping the system away from voltage instability. The latter target can be achieved maintaining an adequate ...

    • On the convergence of the sequential power flow for multiterminal VSC ACDC systems 

      Fernández Pérez, José Carlos; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis (2018-03-01)
      Following the vision of future Supergrids, the existing power systems are expected to evolve into ACDC systems containing Voltage Source Converters with multiterminal configurations. This paper presents a new sequential ...

    • On the nature of voltage impasse regions in power system dynamics studies 

      Oluic, Marina; Berggren, Bertil; Echavarren Cerezo, Francisco; Ghandhari Alavijh, Mehrdad; Rouco Rodríguez, Luis

    • On the nature of voltage impasse regions in power system dynamics studies 

      Oluic, Marina; Berggren, Bertil; Echavarren Cerezo, Francisco; Ghandhari Alavijh, Mehrdad; Rouco Rodríguez, Luis (2018-05-01)
      This paper presents a fundamental study of voltage collapses that occur on a post-fault trajectory of a stressed power system in seconds after large disturbances. The focus of the study are voltage collapses that are induced ...

    • On the nature of voltage impasse regions in power system dynamics studies 

      Oluic, Marina; Berggren, Bertil; Echavarren Cerezo, Francisco; Ghandhari Alavijh, Mehrdad; Rouco Rodríguez, Luis (Institute of Electrical and Electronics Engineers Power and Energy Society (Portland, Estados Unidos de América), 2018-08-05)

    • Optimization of voltage control in wind farms 

      Echavarren Cerezo, Francisco; González García, Alezeia; Rouco Rodríguez, Luis (APDEE, AEDIE (Ponta Delgada, Portugal), 2011-06-30)
      In recent years, wind power has experienced a wide development, emerging both as a potentially attractive means of providing new electricity generating capacity. In addition, modern wind power generators use double fed ...

    • Power flow algorithm using a second-order differentation approach 

      Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Benítez Domínguez, Álvaro; Sigrist, Lukas
      Load flow is the key tool for most of the studies related with electric power systems operation and planning. For a given electric network and power dispatch, power flow provides the state variables of the system, i.e. bus ...

    • Power flow algorithm using a second-order differentation approach 

      Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Benítez Domínguez, Álvaro; Sigrist, Lukas (Institute of Electrical and Electronics Engineers; Institute of Electrical and Electronics Engineers (Belgrado, Serbia), 2023-06-29)
      Load flow is the key tool for most of the studies related with electric power systems operation and planning. For a given electric network and power dispatch, power flow provides the state variables of the system, i.e. bus ...

    • Preventive analysis and solution of overloads in the Spanish electricity market 

      Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Gómez San Román, Tomás; Echavarren Cerezo, Francisco; Navarrete Fernández, María Isabel; Casanova Lafarga, Rosa; López Camino, Gerardo (2004-03-01)
      The technical feasibility of a power generation dispatch in competitive electricity markets consists of not having any overloaded equipment, not only in case of normal operating condition, but also when any contingency ...

    • Reconfiguration of large-scale distribution networks for planning studies 

      González García, Alezeia; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Gómez San Román, Tomás; Cabetas, J.
      Medium Voltage (MV) distribution networks are usually operated radially. However, its structure may be designed so that, in case of the failure of an element, the load downstream can be supplied by adjacent networks through ...

    • Reconfiguration of large-scale distribution networks for planning studies 

      González García, Alezeia; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Gómez San Román, Tomás; Cabetas, J. (2012-05-01)
      Medium Voltage (MV) distribution networks are usually operated radially. However, its structure may be designed meshed, so that in case of a failure of an element, the load downstream can be supplied by adjacent feeders ...

    • Renewable electric energy integration: Quantifying the value of design of markets for international transmission capacity 

      Barquín Gil, Julián; Bialek, Janusz W.; Boyd, Rodney; Dent, Chris J.; Echavarren Cerezo, Francisco; Grau, Thilo; von Hirschhausen, C.; Hobbs, Benjamin F.; et al., ? (2013-11-01)
      Integrating large quantities of variable renewable electricity generation remains a political and operational challenge. One of the main obstacles in Europe to installing at least 200 GWs of power from variable renewable ...