水电站机电技术2026，Vol.49Issue(4)：6-10,52,6.DOI:10.13599/j.cnki.11-5130.2026.04.002
古城水电站1号机组稳定性测试与运行特性分析
Stability test and operation characteristics analysis of Unit 1 of Gucheng Hydropower Plant
李林伟 1杜中奎 2王曾兰 1邓华1
作者信息
- 1. 杭州国电机械设计研究院有限公司,浙江 杭州 310000
- 2. 四川华电杂谷脑水电开发有限责任公司,四川 阿坝 624000
- 折叠
摘要
Abstract
A series of variable-speed,variable-excitation,and variable-load tests were carried out to analyze the post-maintenance operation stability of Unit 1 of Gucheng Hydropower Plant.The results are as follows:the hydroelectric generator operates in good overall state under rated conditions,and the vibration and runout amplitudes of main measuring points meet the specification requirements;the rotor mass unbalance is within the allowable range;during the variable-excitation process,the rotor exhibits significant shaft center displacement,which is primarily attributable to a fixed-direction magnetic pull force caused by misalignment between the stator and the rotor,a phenomenon directly associated with abnormal temperature differences in the shaft bearings;the variable-load test reveals a wide-amplitude vibration zone within the load range of 20%to 95%;frequency-domain analysis shows that the vibration energy is concentrated in low-frequency vortex strip components,while the rotational frequency vibration remains stable,indicating that the vibration is primarily excited by the vortex strip;furthermore,the vertical vibration of the upper frame exceeds the standard limit due to insufficient structural stiffness.It is recommended that the hydroelectric generator be operated at a high load to avoid the vibration zone,and that the monitoring of bearing runout and bearing pad temperature be strengthened.This study can provide a reference for the stability evaluation and operation optimization of similar hydroelectric generators.关键词
水轮发电机组/变转速/变励磁/变负荷/振摆Key words
hydro-generator set/variable-speed/variable-excitation/variable-load/vibration and runout分类
能源科技引用本文复制引用
李林伟,杜中奎,王曾兰,邓华..古城水电站1号机组稳定性测试与运行特性分析[J].水电站机电技术,2026,49(4):6-10,52,6.
