LAUSR

Abstract Pumped storage generating system contains twenty-four transition processes, stability performance of these transition processes determine power system quality and unit vibration. This paper focuses on the stability performance of pumped storage generation system during the transition from condenser mode to generating mode. The physical feature of condenser mode is extensively analyzed, and a mathematical model that describes the dynamic transition process of PSGS is therefore built. As two typical factors related to transition process, the switching points (27 s,30 s and 33 s) and guide vane laws (exponential type and linear type) are selected and further performed to compare stability performance of PSGS. Based on this, numerical results indicate that delayed switching point results in system oscillations and exponential law of guide vane is benefit for quicker loading. This model and analysis method successfully express the transient characteristic of PSGS from condenser mode to generating mode, as well as effectively predict the dynamic response of system parameters.