| 混流式水轮机功率异常波动成因分析 |
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| 引用本文：陈晓云1,吴广宽2，3,刘胜柱2,冯建军2，3,罗兴锜2，3.混流式水轮机功率异常波动成因分析[J].电网与清洁能源,2020,36(2):98~102 |
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| 基金项目:国家自然科学基金项目（51679195）；陕西省自然科学基础研究计划资助项目（2018JM5102） |
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| 中文摘要:石门坎水电站混流式水轮机组在部分负荷下运行时，机组有功功率波动过大导致该电站无法并网发电。采用SST湍流模型对该电站水轮机在偏工况下的三维不稳定流动进行了仿真计算，重点分析了尾水内部压力脉动特性，研究发现：尾水管空腔涡带振动频率与发电机自振频率发生共振是引起机组有功功率摆动过大的主要原因。 |
| 中文关键词:混流式水轮机 非定常 尾水涡带 压力脉动 |
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| Analysis of Abnormal Fluctuations of Output Power of Francis Turbine |
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| Abstract:When the francis turbine unit of Shimenkan Hydropower Station operates under partial load， the fluctuation of active power of the unit is too large， which makes the power station unable to be connected to the grid. In this paper， the SST turbulence model is used to simulate the unsteady three-dimensional turbulence of the Francis turbine under partial load conditions. The characteristics of pressure fluctuation in the draft tube are analyzed. It is found that the resonance of the vibration frequency of the vortex band in the tailrace cavity and the natural vibration frequency of the generator is the main reason for excessive active power swing of the unit. |
| keywords:francis turbine unsteady tailrace vortex pressure fluctuation |
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