This paper studies the nonlinear modeling and operation stability of variable speed pumped storage power station (PSPS). Firstly, basic equations PSPS are established. Nonlinear state equation in form relative deviation value is derived by considering supplementary conditions. Then, Hopf bifurcation analysis carried out. Stable domain studied. Finally, influence factors on analyzed. Dynamic res...

The thermo-mechanical controlled process (TMCP) of 800-MPa-grade non-quenched tempered steel used for penstocks was simulated on a Gleeble-3500 thermo-mechanical simulator. The effect of the finish cooling temperature (FCT) which ranged from 350–550 ◦C on the microstructure and mechanical properties was studied. The microstructure of TMCP specimens is primarily composed of lath bainite (LB) and...

Hydropower plays a key role in the actual energy market due to its fast response and regulation capacity. In that way, hydraulic turbines are increasingly demanded to work at off-design conditions, where complex flow patterns and cavitation appear, especially in Francis turbines. The draft tube cavitation surge is a hydraulic phenomenon that appears in Francis turbines below and above its Best ...

We present a case study of Structural Health Monitoring (SHM) hybrid system based on Brillouin Distributed Fiber Optic Sensors (D-FOS), Vibrating Wire (VW) extensometers and temperature probes for an existing historical water penstock bridge positioned in mountain valley Valle d’Aosta Region, Northwestern Italy. assessed D-FOS performances this kind infrastructure, characterized by complex stru...

Computational analysis is the modern design optimization tool used widely for determining effect of different loading parameters where operating conditions and geometry are complex manual solutions to execute. This study has great significance in penstock branches as ancient technology least chance having minimum head loss good structural strength at same time. Bifurcation Raghuganga Hydropower...

This paper presents the development of a nonlinear model predictive controller (MPC) for controlling variable speed hydropower (VSHP) plants. The MPC coordinates turbine with virtual synchronous generator (VSG) control power electronics converter to optimize plant’s performance. main objective is deliver fast response frequency deviations by utilizing kinetic energy and generator. made possible...

The Red Rock Hydroelectric Project converted the existing Dam near Pella, Iowa, from a non-powered dam into multi-purpose dam. flood control was constructed by U.S. Army Corps of Engineers (USACE) in 1960s on Des Moines River Iowa. hydroelectric project developed Western Minnesota Municipal Power Agency and generates up to 55 MW with an average annual energy output 178 gigawatt-hours. new intak...