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

被引：4

作者：

Li, Xiangyang ^{[1
]}

Cao, Jingwei ^{[2
]}

Zhuang, Jianling ^{[1
]}

Wu, Tongmao ^{[1
]}

Zheng, Hongyong ^{[1
]}

Wang, Yunfeng ^{[1
]}

Zheng, Wenqiang ^{[1
]}

Lin, Guoqing ^{[1
]}

Wang, Zhengwei ^{[2
]}

机构：

[1] Fujian Xianyou Pumped Storage Co Ltd, Putian 351267, Peoples R China

[2] Tsinghua Univ, Dept Energy & Power Engn, Beijing 100084, Peoples R China

来源：

ENERGIES | 2022年 / 15卷 / 11期

基金：

中国国家自然科学基金;

关键词：

pump-turbine; numerical simulation; fluid-structure interaction; head; dynamic stress; STRESSES; FLOW;

D O I：

10.3390/en15114004

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

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.

引用

页数：15

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