Effect of Operating Head on Dynamic Behavior of a Pump–Turbine Runner in Turbine Mode

Xiangyang Li, Jingwei Cao, Jianling Zhuang, Tongmao Wu, Hongyong Zheng, Yunfeng Wang, Wenqiang Zheng, Guoqing Lin and Zhengwei Wang
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Xiangyang Li: Fujian Xianyou Pumped Storage Co., Ltd., Putian 351267, China
Jingwei Cao: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China
Jianling Zhuang: Fujian Xianyou Pumped Storage Co., Ltd., Putian 351267, China
Tongmao Wu: Fujian Xianyou Pumped Storage Co., Ltd., Putian 351267, China
Hongyong Zheng: Fujian Xianyou Pumped Storage Co., Ltd., Putian 351267, China
Yunfeng Wang: Fujian Xianyou Pumped Storage Co., Ltd., Putian 351267, China
Wenqiang Zheng: Fujian Xianyou Pumped Storage Co., Ltd., Putian 351267, China
Guoqing Lin: Fujian Xianyou Pumped Storage Co., Ltd., Putian 351267, China
Zhengwei Wang: Department of Energy and Power Engineering, Tsinghua University, Beijing 100084, China

Energies, 2022, vol. 15, issue 11, 1-15

Abstract: Pumped storage units improve the stability of the power grid, and the key component is the pump–turbine. A pump–turbine usually needs to start and shutdown frequently, and the operating head varies greatly due to changes in the water level of the reservoir, which makes the dynamic behavior of a pump–turbine runner extremely complex. This paper investigates the effects of operating head on the dynamic response characteristics of a pump–turbine runner in turbine mode. The flow characteristics of the pump–turbine at maximum head, rated head and minimum head are analyzed, and the dynamic response characteristic of the pump–turbine runner are numerically studied. The results show that operating head can affect the pressure pulsation and dynamic stress characteristics of the pump–turbine runner, but it has little effect on the frequency spectra. The conclusions of this paper intend to improve understanding of the effects of the operating head on the dynamic behavior of the pump–turbine runner, therefore providing a theoretical reference for safe and stable operation of the pump–turbine unit.

Keywords: pump–turbine; numerical simulation; fluid-structure interaction; head; dynamic stress (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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