Now showing items 21-25 of 25

    • Sensor-based optimized control of the full load instability in large hydraulic turbines 

      Presas Batlló, Alexandre; Valentín Ruiz, David; Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (Multidisciplinary Digital Publishing Institute (MDPI), 2018-03-30)
      Article
      Open Access
      Hydropower plants are of paramount importance for the integration of intermittent renewable energy sources in the power grid. In order to match the energy generated and consumed, Large hydraulic turbines have to work under ...
    • Study of the dynamic behavior of Pelton Turbines 

      Egusquiza Montagut, Mònica (Universitat Politècnica de Catalunya, 2020-02-14)
      Doctoral thesis
      Open Access
      The future of hydropower is tied to the rapid increase of new renewable energies, such as photovoltaic and wind energy. With the growing share of intermittent electricity production, the operation of hydropower installations ...
    • Synchronous condenser operation in Francis turbines: Effects in the runner stress and machine vibration 

      Valentín Ruiz, David; Presas Batlló, Alexandre; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard (Elsevier, 2020-02-01)
      Article
      Restricted access - publisher's policy
      Reactive power shortage is one of the current issues that endanger the stability of the power grid systems. Some massive blackouts have been experienced in the past years due to the unbalance of reactive power. One of the ...
    • Transmission of high frequency vibrations in rotating systems. Application to cavitation detection in hydraulic turbines 

      Valentín Ruiz, David; Presas Batlló, Alexandre; Egusquiza Montagut, Mònica; Valero Ferrando, Ma. del Carmen; Egusquiza Estévez, Eduard (Multidisciplinary Digital Publishing Institute, 2018-03-16)
      Article
      Open Access
      One of the main causes of damage in hydraulic turbines is cavitation. While not all cavitation appearing in a turbine is of a destructive type, erosive cavitation can severely affect the structure, thus increasing maintenance ...
    • Transposition of the mechanical behavior from model to prototype of Francis turbines 

      Valentín Ruiz, David; Presas Batlló, Alexandre; Valero Ferrando, Ma. del Carmen; Egusquiza Montagut, Mònica; Egusquiza Estévez, Eduard; Gomes, João; Avellan, François (Elsevier, 2020-06-01)
      Article
      Restricted access - publisher's policy
      Hydropower is nowadays essential for balancing the electrical grid providing flexibility and fast response. The role of hydraulic turbines has changed from working at their Best Efficiency Point (BEP) to work in the whole ...