Prediction of Francis Turbine Prototype Part Load Pressure and Output Power Fluctuations with Hydroelectric Model

HYPERBOLE Symposium 2017 (HYdropower plants PERformance and flexiBle Operation towards Lean integration of new renewable Energies)

Alligné, S.^1 ; Nicolet, C.^1 ; Béguin, A.^1 ; Landry, C.^1 ; Gomes, J.^2 ; Avellan, F.^2

Power Vision Engineering Sàrl, Ch. Des champs courbes 1, Ecublens

CH 1024, Switzerland^1

Ecole Polytechnique Fédérale de Lausanne, Laboratory for Hydraulic Machines, Lausanne

CH 1007, Switzerland^2

关键词: Cavitation vortex ropes;    Doubly fed induction machines;    Electrical components;    Hydraulic excitations;    Hydroelectric systems;    Output power fluctuations;    Pressure fluctuation;    Reduced scale models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/813/1/012016/pdf
DOI  :  10.1088/1742-6596/813/1/012016

来源: IOP

【 摘 要 】

The prediction of pressure and output power fluctuations amplitudes on Francis turbine prototype is a challenge for hydro-equipment industry since it is subjected to guarantees to ensure smooth and reliable operation of the hydro units. The European FP7 research project Hyperbole aims to setup a methodology to transpose the pressure fluctuations induced by the cavitation vortex rope from the reduced scale model to the prototype generating units. A Francis turbine unit of 444MW with a specific speed value of ν = 0.29, is considered as case study. A SIMSEN model of the power station including electrical system, controllers, rotating train and hydraulic system with transposed draft tube excitation sources is setup. Based on this model, a frequency analysis of the hydroelectric system is performed for all technologies to analyse potential interactions between hydraulic excitation sources and electrical components. Three technologies have been compared: the classical fixed speed configuration with Synchronous Machine (SM) and the two variable speed technologies which are Doubly Fed Induction Machine (DFIM) and Full Size Frequency Converter (FSFC).