Abstract Power generation from intermittent renewable energy resources (e.g. wind, solar) requires regulation of the electric grid. Although most hydraulic turbines are designed to work in their best efficiency points, nowadays they being used more often under varying operating conditions stabilize Unstable and fluid flow during transient operation cause significant pressure fluctuations load v...

-A full-recovery technique was used in mortality experiments conducted with juveniles of American shad Alosa sapidissima and striped bass Morone saxatilis passed through Ossberger crossflow turbines to obtain antecedent information about their fish passage characteristics. Immediate turbine-induced mortality was 66% for 85-mm-long (total length) American shad. Turbineinduced mortality of stripe...

This research paper proposes a methodology to apply identification methods find simplified model of three different governors in single area electric power system (SAEPS). A SAEPS with governors-turbine is presented: hydraulic turbine, steam turbine and reheat turbine. In this same investigation, an analytic reduction has been performed, fifth order was found analytically, thus transfer functio...

Hydrostatic power transmission between the rotor of a wind turbine and generator, which can be placed on ground, is way to reduce cost installing turbine, reducing mass at height. The article shows ability hydrostatic cope with disturbance due change in air flow that drives rotor. When increasing flow, would normally lead an increase drive speed electric by adjusting geometric volume hydraulic ...

The pitch system is notably one of the critical subsystems a wind turbine, supporting its effective control towards maximising capture and at same time protecting integrity in cases excessive loads. A pitching mechanism also responsible for operational downtime, hence reliability performance needs to be carefully evaluated so as ensure availability. This study aims derive failure rates two conf...

The present paper demonstrates a proof-of-concept by introducing variable guide vane system in the draft tube of high-head Francis model turbine. aim is to examine hydraulic performance turbine while mitigating pressure pulsations tube. vanes can rotate about an axis up ±45°. mitigation studies were performed at lower- and upper-part loads. was examined all operating ranges within head. There s...