Run-of-river hydropower plants are a cost-efficient technology that produce power output proportional to the instantaneous flow of water diverted from exploited stream by exploiting several mechanical, hydraulic, and electric devices. However, as no storage is available, its design operation tailored according unpredictability generation. Hence, modelling this type necessity for promotion devel...

The demand for energy storage systems is rising together with the proportion of renewable sources (RES) in power systems. highest capacity among various provided by pumped-storage hydropower (PSH). In this paper, ability real-time digital simulator (RTDS), e.g., dSpace–SCALEXIO, to emulate a complex plant four units, two common penstocks, surge tank, and long headrace tunnel investigated. RTDS ...

A particular river-whiting phenomenon occurred in the early 2000s in the Xiaoche River and since then it has been reoccurring from June to November each year. Residents were surprised by this phenomenon and worried about it. This study was designed to reveal the forming mechanism of the river-whiting phenomenon. A comparison of T, EC, ORP, DO, TDS and δ34S in the culvert water and discharge pip...

This work analyses the configuration and operation principles of hybrid wind-hydro power plants with pumped storage integrated into autonomous electric grid systems, in order to support high wind energy penetration. The plant consists of wind generation units, combined with a pumped-hydro storage system. It operates on a daily basis, storing the surplus wind production by pumping water in an el...

Over the past few years, there has been significant interest in importance of reversible hydro-pumping systems due to their favorable flexibility and economic environmental characteristics. When designing lines, it is crucial consider dynamic effects corresponding extreme pressures that may occur during normal emergency operating scenarios. This research describes essentially turbine operation,...

At low flow rate operation, Francis turbines feature a cavitating vortex rope in the draft tube resulting from the swirling flow of the runner outlet. The unsteady pressure field related to the precession of the vortex rope induces plane wave propagating in the entire hydraulic system. The frequency of the vortex rope precession being comprised between 0.2 and 0.4 times the turbine rotational s...