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Mostrando ítems 1-11 de 11

    • A least-squares approach to estimate Lagrange multipliers in a combined method to voltages collapse detection 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Navarrete Fernández, María Isabel; Casanova Lafarga, Rosa; López, G.; Cacho, F.; Pézic, M. (Sin editorial (Vilamoura, Portugal), 2003-07-03)
      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 load shedding algorithm for improvement of load margin to voltage collapse 

      Echavarren Cerezo, Francisco; Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Navarrete Fernández, María Isabel; Casanova Lafarga, Rosa; López, G. (Sin editorial (Bolonia, Italia), 23/06/2003)
      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 mixed-integer LP-based network topology optimization algorithm for overload alleviation 

      Lobato Miguélez, Enrique; Echavarren Cerezo, Francisco; Rouco Rodríguez, Luis; Navarrete Fernández, María Luisa; Casanova Lafarga, Rosa; López Camino, Gerardo (Sin editorial (Bolonia, Italia), 2003-06-23)
      Line switching is used in power system operation to alleviate branch overloads. This paper presents a mixed-integer linear programming algorithm that determines the optimal switching strategies to remove or reduce overloads ...

    • 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 (2004-11-01)
      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 ...

    • An Integrated Tool for Analysis of Power System Constraints in the Spanish Electricity Market 

      Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Navarrete Fernández, María Isabel; Casanova Lafarga, Rosa; López, G.; García Castillejo, J. (Sin editorial (Seattle, Estados Unidos de América), 2000-07-16)
      The role of the System Operator in the Spanish electricity market, as it started on January 1st 1998, is to determine the technical feasibility of the generation dispatch provided by the Market Operator. The security ...

    • An LP-based optimal power flow for transmission losses and generator reactive margins minimization 

      Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Navarrete Fernández, María Isabel; Casanova Lafarga, Rosa; López, G. (Sin editorial (Oporto, Portugal), 2001-09-10)
      This paper describes a mixed-integer linear programming optimal power flow. The objective function consists of minmizing transmission losses and generator reactive outputs. The problem constraints are the power flow equations ...

    • Aplicación práctica de un despacho preventivo de activa: Redespacho de generación efectivos y de compensación 

      Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Navarrete Fernández, María Isabel; Casanova Lafarga, Rosa; López Camino, Gerardo (Sin editorial (Madrid, España), 2001-07-04)
      Los criterios técnicos de operación del sistema eléctrico español exigen que los flujos de potencia por las líneas y transformadores del sistema estén dentro de valores admisible, en funcionamiento normal y en caso de ...

    • ARO: Una herramienta para el análisis de restricciones de operación en el mercado español de energía eléctrica 

      Lobato Miguélez, Enrique; Rouco Rodríguez, Luis; Navarrete Fernández, María Isabel; Casanova Lafarga, Rosa; López Camino, Gerardo (2001-05-01)
      El tratamiento de restricciones técnicas impuestas por la red de transporte en mercados de energía eléctrica, cuya casación de ofertas de generación y demanda se realiza ignorando la red, es una tarea importante. Este es ...

    • 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) ...

    • 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 ...

    • Solution of daily 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 (Sevilla, España), 2002-06-24)
      Voltage constraints in the Spanish electricity market are solved connecting a set of off-line generators. The start up cost internalized in the fixed income term of the generator bid plays a key role in the solution of ...