The hub ratio of a bulb turbine has an important influence on the unit’s flow capacity, efficiency, and operating stability and is one of the key parameters governing the hydraulic performance and structural safety of the turbine. To select the optimal hub ratio matching the bulb turbine of a hydropower station after l...
Zheng-Peng Wei, Yang Liu, Zheng-Wei Wang et al.· Energies· 0 citations
Hydraulic short-circuit (HSC) operation is an important approach to enhancing the operational flexibility of pumped-storage power plants (PSPPs). However, under this new operating mode, the flow characteristics in the bifurcated pipe deteriorate significantly, posing a threat to the efficiency of the piping system and...
Shan Zhu, M. Xia, Shi-Zhe Liu et al.· Machines· 0 citations
The grid volatility caused by the integration of wind and solar power poses challenges to power systems, where Pumped Storage Hydropower (PSH) plays an irreplaceable role. During start-up, shutdown, and mode transition of pump turbines, near-zero flow conditions frequently occur, leading to severe hydraulic instability...
Hui Zeng, Yuhao Yan, Bin Wang et al.· Machines· 0 citations
During load rejection in pumped-storage power stations, the rotational speed of the pump-turbine increases abruptly. The consequent structural deterioration of the internal flow induces high-amplitude hydraulic excitations, posing a serious threat to the operational stability of the unit. This study investigates a Fran...
Lei Deng, Wenfu Han, Yuhao Yan et al.· Water· 0 citations
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