下迷宫压力脉动对抽水蓄能机组稳定性的影响分析
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摘要
水泵水轮机组的运行稳定性对抽水蓄能电站的安全高效运行至关重要。对广蓄A厂抽水蓄能机组发电工况进行了稳定性试验,深入分析了各工况下迷宫压力脉动、顶盖振动和水导轴承摆度信号之间的关系。结果表明:转频、转轮叶片通过频率及尾水管内的低频旋转涡带是引起下迷宫压力脉动的关键频率;下迷宫压力脉动信号与顶盖振动、水导轴承摆度信号高度相干,对抽水蓄能机组水平和垂直两个方向的振摆都有重要影响。
Pumped-storage power station was widely concerned since its important role. The running stability of the pump-turbine unit as the core component was essential to the safe and stable operation of the plant. The stability tests were conducted under working condition of hydroelectric generating set. The test data were analyzed,including the lower labyrinth pressure pulsation,the guide bearing swing and the head cover vibration. It was revealed that the main frequency causing the labyrinth pressure pulsation was the rotation frequency,the blade passing frequency of runner and the vortex rope of draft tube. The signals of labyrinth pressure fluctuation were strong correlated with the signals of the turbine bearing swing and the head cover vibration and had a strong influence on the vertical / horizontal vibration and swing of turbine.
Pumped-storage power station was widely concerned since its important role. The running stability of the pump-turbine unit as the core component was essential to the safe and stable operation of the plant. The stability tests were conducted under working condition of hydroelectric generating set. The test data were analyzed,including the lower labyrinth pressure pulsation,the guide bearing swing and the head cover vibration. It was revealed that the main frequency causing the labyrinth pressure pulsation was the rotation frequency,the blade passing frequency of runner and the vortex rope of draft tube. The signals of labyrinth pressure fluctuation were strong correlated with the signals of the turbine bearing swing and the head cover vibration and had a strong influence on the vertical / horizontal vibration and swing of turbine.
引文
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14 傅丽萍,阎宗国,吴烈龙,等.水轮发电机组上机架共振分析及补气减振[J].排灌机械工程学报,2013,31(6):501-506.Fu Liping,Yan Zongguo,Wu Lielong,et al.Research on upper bracket resonance and air admission damping of hydroelectric unit[J].Journal of Drainage and Irrigation Machinery Engineering,2013,31(6):501-506.(in Chinese)
15 梁兴雨,舒歌群.基于相干功率谱分析的复杂柴油机噪声源识别[J].内燃机学报,2006,24(4):344-350.Liang Xingyu,Shu Gequn.Identification of complex noise source of diesel engine based on coherent power spectrum analysis[J].Transactions of CSICE,2006,24(4):344-350.(in Chinese)
2 Run Hongjuan,Luo Xianwu,Zhu Lei,et al.Experimental study of the pressure fluctuations in a pump turbine at large partial flow conditions[J].Chinese Journal of Mechanical Engineering,2012,25(6):1205-1209.
3 冉红娟.中等比转速水泵水轮机的两种非稳态现象的研究[D].北京:清华大学,2010.Ran Hongjuan.Study on double positive slopes phenomena in pump turbines[D].Beijing:Tsinghua University,2010.(in Chinese)
4 郑源,汪保罗,曲波.混流式水轮机尾水管压力脉动研究综述[J].水力发电,2007,33(2):66-69.Zheng Yuan,Wang Baoluo,Qu Bo.Study on the pressure pulse in the draft tube of Francis turbine[J].Water Power,2007,33 (2):66-69.(in Chinese)
5 钱忠东,郑彪,杨建东,等.水轮机补气条件下压力脉动的数值分析[J].水力发电学报,2008,27(4):126-129.Qian Zhongdong,Zheng Biao,Yang Jiandong,et al.Numerical simulation and analysis of pressure pulsation in Francis hydraulic turbine with air admission[J].Journal of Hydroelectric Engineering,2008,27(4):126-129.(in Chinese)
6 刘锦涛,刘树红,孙跃昆,等.水泵水轮机空载开度压力脉动特性预测[J].工程热物理学报,2012,33(3):411-414.Liu Jintao,Liu Shuhong,Sun Yuekun,et al.Predietion of pressure fluctuation of a pump-turbine at no-load opening[J].Journal of Thermophysics,2012,33(3):411-414.(in Chinese)
7 Sun Yuekun,Zuo Zhigang,Liu Shuhong,et al.Experimental study of pressure fluctuations of a pump-turbine in transient period[C]∥First International Conference on Energy and Environmental Protection(ICEEP 2012),Huhhot,China.2012.
8 王乐勤,刘迎圆,刘万江,等.水泵水轮机泵工况的压力脉动特性[J].排灌机械工程学报,2013,31(1):7-10.Wang Leqin,Liu Yingyuan,Liu Wanjiang,et al.Pressure fluctuation characteristics of pump-turbine at pump mode[J].Journal of Drainage and Irrigation Machinery Engineering,2013,31(1):7-10.(in Chinese)
9 王正伟,周凌九.RSI现象的不稳定流动模拟[J].清华大学学报:自然科学版,2001,41(10):74-77.Wang Zhengwei,Zhou Lingjiu.Rotator-stator interaction induced unsteady-flow simulation[J].Journal of Tsinghua University:Science and Technology,2001,41(10):74-77.(in Chinese)
10 陈婧,马震岳,刘志明,等.水轮机压力脉动诱发厂房振动分析[J].水力发电,2004,30(5):24-27.Chen Jing,Ma Zhenyue,Liu Zhiming,et al.Vibration analysis of power house due to the pressure pulsation of hydro-turbine[J].Water Power,2004,30(5):24-27.(in Chinese)
11 郭涛,张立翔,姚激.水轮机流道压力脉动诱发厂房振动分析[J].地震工程与工程振动,2011,31(6):136-140.Guo Tao,Zhang Lixiang,Yao Ji.Vibration analysis of powerhouse induced by pulsation pressure of hydro-turbine[J].Journal of Earthquake Engineering and Engineering Vibration,2011,31(6):136-140.(in Chinese)
12 魏述和,张燎军,闫毅志.基于流固耦合数值方法的尾水涡带诱发尾水管振动分析[J].水力发电,2009,35(5):90-92.Wei Shuhe,Zhang Liaojun,Yan Yizhi.Analysis of draft tube vibration induced by tailrace eddy based on fluid-structure coupling numerical method[J].Water Power,2009,35(5):90-92.(in Chinese)
13 张伟,吴玉林,陈乃祥,等.蓄能机组压力脉动测试研究[J].水力发电学报,2001(1):72-78.Zhang Wei,Wu Yulin,Chen Naixiang,et al.Research on the test of pressure pulsation for pumped-storage unit[J].Journal of Hydroelectric Engineering,2001(1):72-78.(in Chinese)
14 傅丽萍,阎宗国,吴烈龙,等.水轮发电机组上机架共振分析及补气减振[J].排灌机械工程学报,2013,31(6):501-506.Fu Liping,Yan Zongguo,Wu Lielong,et al.Research on upper bracket resonance and air admission damping of hydroelectric unit[J].Journal of Drainage and Irrigation Machinery Engineering,2013,31(6):501-506.(in Chinese)
15 梁兴雨,舒歌群.基于相干功率谱分析的复杂柴油机噪声源识别[J].内燃机学报,2006,24(4):344-350.Liang Xingyu,Shu Gequn.Identification of complex noise source of diesel engine based on coherent power spectrum analysis[J].Transactions of CSICE,2006,24(4):344-350.(in Chinese)
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