机组额定水头与运行稳定性的关系  

The Relationship Between Rated Head of The Unit and Operational Stability

作　　者：丁鈺 DING Yu(Xinjiang Institute of Water&Hydropower Engineering Investigation,Design and ResearchCo.,Ltd.,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院,新疆乌鲁木齐830000

出　　处：《云南水力发电》2025年第3期137-140,共4页Yunnan Water Power

摘　　要：水头变幅大的水电站明显存在运行不稳定的问题,有大量电站还出现过叶片破裂、尾水锥管破损等运行事故。因此,额定水头的大小影响着水轮机在不同水头段的稳定运行以及机组的长期安全运行,也会对水电站能否充分利用水能产生影响。结合工程实例PNZ水电站,从水轮机稳定性相关方面,结合工程特性,对电站额定水头的选择进行了分析。Hydroelectric power stations with large head fluctuations have obvious problems of unstable operation,and a large number of power stations have also experienced operational accidents such as blade rupture and tailwater cone tube damage.Therefore,the size of the rated head affects the stable operation of the turbine in different head sections and the long-term safe operation of the unit,and also has an impact on whether the hydropower station can fully utilize water energy.Based on the engineering example of PNZ hydropower station,this article analyzes the selection of rated head for the power station from the perspective of turbine stability and engineering characteristics.

关 键 词：水电站 额定水头 水轮机选型 稳定性 

分 类 号：TK71.2[动力工程及工程热物理—流体机械及工程]