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UPCommons. Portal del coneixement obert de la UPC
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88503 Publications
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  • Equivalent model of large-scale synchronous photovoltaic power plants

    Remón Rodríguez, Daniel; Mir Cantarellas, Antoni; Rodríguez Cortés, Pedro (2016)
    The impact that power plants employing renewable energy sources have on power systems is no longer negligible due to the ever-increasing portion of the power share that these generation systems represent. Therefore, the static and dynamic effects of these power plants on the grid must be analyzed in at least the same degree of detail as conventional generating units. For this purpose, it is necessary to develop models that are accurate and able to capture the dynamics of interest for the anal...

    Agencia para la Calidad del sistema Universitario de Cataluña (AQU)

    Rauret Dalmau, Gemma (2007)
    El sistema catalán de educación superior abarca sólo universidades tradicionales y en la actualidad no incluye otros tipos de instituciones, como los conservatorios de música. Sin embargo, sus universidades ofrecen una amplia gama de asignaturas. Actualmente, el sistema universitario catalán consta de doce universidades, siete de las cuales son públicas. Aproximadamente, hay 227.000 estudiantes matriculados en ellas, de los cuales casi una cuarta parte están inscritos en las universidades pri...

    Efecto de las altas temperaturas en aleaciones de titanio para aplicaciones aeronáuticas

    Morata Royes, Joan (2017)
    En este trabajo final de grado se estudian los fenómenos de oxidación que tienen lugar en una aleación de titanio 6Al-2Sn-4Zr-2Mo. El conocimiento del comportamiento en estas condiciones es muy necesario en el sector aeronáutico para la fabricación de componentes como motores o turbinas. La particularidad de este estudio recae en que los tratamientos térmicos que se realizan son cíclicos a diferencia de la gran mayoría de trabajos, que se observan en la literatura, donde se evalúa la respuest...

    Design and coordination of a capacitor and on-load tap changer system for voltage control in a wind power plant of doubly fed induction generator wind turbines

    Martinez, J.; Rodríguez Cortés, Pedro; Kjaer, P. C.; Teodorescu, Remus (2011)
    In this paper, a novel coordination and control strategy for capacitor banks and on-load tap changer for a wind power plant is introduced. The capacitor banks are controlled in such way that the steady-state usage of the converters for reactive power injection is driven below to a maximum desired value of 0.1 pu. Additionally, the control transients because of the capacitor bank switching are minimized by using a suitable control structure. The tap changer control is coordinated with...

    Efecto del envasado en atmósfera modificada sobre la vida útil y calidad de piña procesada congelada

    Lebón Santos, Martin (2015)
    Pineapple (Ananas comosus) is the world's most popular non-citrus tropical fruit. Consumer demand for packaged fresh-cut products is increasing rapidly in the world market, and the fresh-cut and packaged pineapple is already in many supermarkets and food service chains, as it is appreciated for its taste, flavor and juiciness. However, its shelf-life is limited by changes in color, texture, appearance, unpleasant tastes and microbial growth which are affected by packaging conditions, storage ...
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