Simulation model of a variable-speed pumped-storage power plant in unstable operating conditions in pumping mode

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

Martínez-Lucas, G.^1 ; Pérez-Díaz, J.I.^1 ; Sarasúa, J.I.^1 ; Cavazzini, G.^2 ; Pavesi, G.^2 ; Ardizzon, G.^2

Department of Hydraulic, Energy and Environmental Engineering, Technical University of Madrid, C/ Profesor Aranguren 3, Madrid

28040, Spain^1

Department of Industrial Engineering, University of Padova, Via Venezia 1, Padova

35131, Italy^2

关键词: Design parameters;    Dynamic behaviors;    Hydraulic machines;    Numerical results;    Operating condition;    Operation conditions;    Reasonable accuracy;    Sinusoidal functions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/813/1/012028/pdf
DOI  :  10.1088/1742-6596/813/1/012028

来源: IOP

【 摘 要 】

This paper presents a dynamic simulation model of a laboratory-scale pumped-storage power plant (PSPP) operating in pumping mode with variable speed. The model considers the dynamic behavior of the conduits by means of an elastic water column approach, and synthetically generates both pressure and torque pulsations that reproduce the operation of the hydraulic machine in its instability region. The pressure and torque pulsations are generated each from a different set of sinusoidal functions. These functions were calibrated from the results of a CFD model, which was in turn validated from experimental data. Simulation model results match the numerical results of the CFD model with reasonable accuracy. The pump-turbine model (the functions used to generate pressure and torque pulsations inclusive) was up-scaled by hydraulic similarity according to the design parameters of a real PSPP and included in a dynamic simulation model of the said PSPP. Preliminary conclusions on the impact of unstable operation conditions on the penstock fatigue were obtained by means of a Monte Carlo simulation-based fatigue analysis.