Now showing items 1-20 of 35

    • A Corrective Load Shedding Scheme to Mitigate Voltage Collapse 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis (01/01/2006)
      Voltage stability is concerned with the ability of a power system to maintain acceptable voltages at all buses. A measure of the power system voltage stability is the distance to the saddle node bifurcation of the power ...
    • A power flow solvability identification and calculation algorithm 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis (01/01/2006)
      This paper presents a continuation and optimization based algorithm to detect power flow unsolvability. In addition, the algorithm obtains the power flow solution, if it exists, no matter how ill-conditioned the power ...
    • A practical approach to solve power system constraints with application to 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 (01/11/2004)
      The solution of power system constraints is an important issue that has to be addressed to achieve a fair operation of a competitive electricity market. In the Spanish electricity market, the System Operator (SO) is in ...
    • A review of the state of the art of UFLS schemes for isolated power systems 

      Sigrist, Lukas; Rouco Rodríguez, Luis; Echavarren Cerezo, Francisco (01/07/2018)
      This paper presents a review of the state of the art of UFLS schemes for isolated power systems. Isolated power systems are especially sensitive to power imbalances and underfrequency load-shedding (UFLS) schemes are crucial ...
    • A sensitivities computation method for reconfiguration of radial networks 

      González García, Alezeia; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Gómez San Román, Tomás (01/08/2012)
      Distribution networks are operated in a radial configuration, but their topology, especially in urban areas, is normally meshed in order to improve reliability of supply. This makes it possible to configure the network ...
    • El colapso de tensión: Causas y soluciones (I/II) 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Rodríguez García, Juan Manuel (01/01/2006)
      El colapso de tensiones constituye uno de los fenómenos más estudiados en los sistemas de energía eléctrica durante los últimos años. El colapso de tensiones está íntimamente relacionado con el estudio de la estabilidad ...
    • El colapso de tensión: Causas y soluciones (II/II) 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Rodríguez García, Juan Manuel (01/03/2006)
      El colapso de tensiones constituye uno de los fenómenos más estudiados en los sistemas de energía eléctrica durante los últimos años. El colapso de tensiones está íntimamente relacionado con el estudio de la estabilidad ...
    • Contingency Analysis: A Feasibility Identification and Calculation Algorithm 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis (05/09/2005)
      This paper presents a continuation and optimization based algorithm to detect power flow unfeasibility under the occurrence of contingency hypothesis. In addition, the algorithm obtains the power flow solution under ...
    • Control de los sistemas de energía eléctrica 

      Echavarren Cerezo, Francisco; Egido Cortés, Ignacio; Lobato Miguélez, Enrique; Sigrist, Lukas (24/08/2015)
    • Decision trees applied to forecasting switched shunt devices within the Spanish power system 

      Lobato Miguélez, Enrique; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Ugedo Álvarez-Ossorio, Alejandro (01/06/2007)
      Static security assessment within a power system requires:(a) building a scenario of the power system network that represents the state of the network for a particular time spot and (b) running a number of static security ...
    • Electrotecnia 

      Alonso Alonso, Jesús; Calle Cesteros, Alberto; Echavarren Cerezo, Francisco; Estévez Solis, Ricardo; Fernández Alonso, Daniel; Fernández Magéster, Gerardo; García Ramos, Alberto; Hidalgo Romo, Raúl; Laloux Dallemagne, Damien; Maroto Carro, Juan Carlos; Mata García, Luis Javier; Pinela Ocaña, Jose Luis; Sánchez Carazo, María Teresa; Sánchez Medina, Alfonso Carlos; Sarandeses Yebra-Pimentel, Sabela; Soler Soneira, David; Timón Zapata, Iván José; Torres Pozas, Juan; Ugedo Álvarez-Ossorio, Alejandro; Urretavizcaya González, José María; Vázquez Bravo, Oswaldo; Ventosa Rodríguez, Mariano (24/10/2016)
    • Electrotecnia 

      Alonso Alonso, Jesús; Calle Cesteros, Alberto; Echavarren Cerezo, Francisco; Estévez Solis, Ricardo; Fernández Alonso, Daniel; Fernández Magéster, Gerardo; García Ramos, Alberto; Gómez-Escalonilla Torres, Javier; Hidalgo Romo, Raúl; Laloux Dallemagne, Damien; Maroto Carro, Juan Carlos; Picatoste Calvo, Enrique; Pinela Ocaña, Jose Luis; Sánchez Carazo, María Teresa; Sánchez Medina, Alfonso Carlos; Sarandeses Yebra-Pimentel, Sabela; Soler Soneira, David; Torres Pozas, Juan; Ugedo Álvarez-Ossorio, Alejandro; Urretavizcaya González, José María; Vázquez Bravo, Oswaldo; Ventosa Rodríguez, Mariano (29/08/2017)
    • Elimination of voltage violations in the Spanish electricity market: Part I: Theory 

      Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Gómez San Román, Tomás; Echavarren Cerezo, Francisco (01/08/2005)
      The solution of voltage violations in the Spanish electricity market must consider: (a) the connection of off-line units (considering the active and reactive power injection effect), (b) the adjustment of the voltage control ...
    • Elimination of voltage violations in the Spanish electricity market: Part II: Case study 

      Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Gómez San Román, Tomás; Echavarren Cerezo, Francisco (01/08/2005)
      The solution of voltage violations in each hourly scenario of the Spanish electricity market must consider: (a) the connection of off-line units (considering the active and reactive power injection effect), (b) the adjustment ...
    • Formulation, computation and improvement of steady state security margins in power systems. Part I: theoretical framework 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Gómez San Román, Tomás (01/02/2011)
      A steady state security margin for a particular operational point can be defined as the distance from this initial point to the secure operational limits of the system. Four of the most used steady state security margins ...
    • Formulation, computation and improvement of steady state security margins in power systems. Part II: results 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Gómez San Román, Tomás (01/02/2011)
      A steady state security margin for a particular operating point can be defined as the distance from this initial point to the secure operating limits of the system. Four of the most used steady state security margins are ...
    • Full active-reactive DC power flow model with loss compensation 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis
      This paper formulates a generic DC approximation of the full active-reactive AC power flow problem. This novel approximation includes a novel linear reactive DC model than can be used to estimate bus voltage magnitudes and ...
    • 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 (01/10/2017)
      This paper studies the impact of Voltage Source Converter (VSC) losses on the solution of the Optimal Power Flow (OPF) of hybrid AC/DC systems with a multi-terminal configuration. The motivation of this analysis is that ...
    • Island power systems 

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