The continuous variable speed technology is a key in the development of pumped storage units. When operating range rotation widened, unit's stable and safe operation will be constrained by conditions, such as cavitation, hump, power limit. This paper uses traditional fixed-speed station research object. Based on complete characteristic curves unit, modification hypothesis after application carr...

This paper presents a comparison between a decentralized and a distributed model-based predictive controller on a hydro power valley (HPV) benchmark recently proposed. The HPV is composed by three lakes and a river that is divided in six reaches that terminate with dams equipped with turbines for power production. The lakes and the river reaches are connected in three different ways: by a duct,...

Abstract The BEM method is extensively used for analyzing the aerodynamic performance of wind turbines and marine propellers. It computationally fast easily implemented while it can give fairly accurate results. Application to predict forces acting on rotor blades a model scale axial shaft-driven Counter-Rotating Pump-Turbine (CRPT) investigated. Some modifications have been proposed adopt clas...

The management of a water distribution network (WDN) is performed by valve and pump control, to regulate both the pressure and the discharge between certain limits. The energy that is usually merely dissipated by valves can instead be converted and used to partially supply the pumping stations. Pumps used as turbines (PAT) can be used in order to both reduce pressure and recover energy, with pr...

The flow hydrodynamics in a low specific speed radial pump-turbine reduced scale model is experimentally investigated under off-design operating conditions in generating mode. Wall pressure measurements, in the stator, synchronized with high-speed flow visualizations in the vaneless space between the impeller and the guide vanes using air bubbles injection are performed. When starting from the ...