000255343 001__ 255343
000255343 005__ 20190812210022.0
000255343 037__ $$aCONF
000255343 245__ $$aForced response analysis of hydroelectric systems
000255343 260__ $$c2014$$bInternational Association For Hydraulic Research
000255343 269__ $$a2014
000255343 300__ $$a14
000255343 336__ $$aConference Papers
000255343 520__ $$aAt off-design operating points, Francis turbines develop cavitation vortex rope in the draft tube which may interact with the hydraulic system. Risk resonance assessment by means of eigenmodes computation of the system is usually performed. However, the system response to the excitation source induced by the cavitation vortex rope is not predicted in terms of amplitudes and phase. Only eigenmodes shapes with related frequencies and dampings can be predicted. Besides this modal analysis, the risk resonance assessment can be completed by a forced response analysis. This method allows identifying the contribution of each eigenmode into the system response which depends on the system boundary conditions and the excitation source location. In this paper, a forced response analysis of a Francis turbine hydroelectric power plant including hydraulic system, rotating train, electrical system and control devices is performed. First, the general methodology of the forced response analysis is presented and validated with time domain simulations. Then, analysis of electrical, hydraulic and hydroelectric systems are performed and compared to analyse the influence of control structures on pressure fluctuations induced by cavitation vortex rope.
000255343 542__ $$fCC BY
000255343 700__ $$aAlligné, Sébastien$$0243097
000255343 700__ $$0247140$$g180048$$aSilva, PCO
000255343 700__ $$aBéguin, Antoine$$0243138
000255343 700__ $$aKawkabani, Basile$$0240495
000255343 700__ $$aAllenbach, Philippe$$0242127
000255343 700__ $$aNicolet, Christophe
000255343 700__ $$0241012$$aAvellan, François
000255343 7112_ $$dSeptember 22-26, 2014$$cMontréal, Canada$$a27th IAHR Symposium on Hydraulic Machinery and Systems
000255343 773__ $$q1-14$$j1$$tProceedings of the 27th IAHR Symposium on Hydraulic Machinery and Systems
000255343 8560_ $$femilie.reynaud@epfl.ch
000255343 8564_ $$uhttps://infoscience.epfl.ch/record/255343/files/Forced%20response%20analysis%20of%20hydroelectric%20systems.pdf$$s393067
000255343 8564_ $$xpdfa$$uhttps://infoscience.epfl.ch/record/255343/files/Forced%20response%20analysis%20of%20hydroelectric%20systems.pdf?subformat=pdfa$$s1763569
000255343 909C0 $$xU10309$$pLMH$$mfrancois.avellan@epfl.ch$$0252135
000255343 909CO $$qGLOBAL_SET$$pconf$$pSTI$$ooai:infoscience.epfl.ch:255343
000255343 960__ $$aemilie.reynaud@epfl.ch
000255343 961__ $$alaurence.gauvin@epfl.ch
000255343 973__ $$rREVIEWED$$aEPFL
000255343 980__ $$aCONF
000255343 981__ $$aoverwrite