| 水轮机压力脉动的测试分析与评价 |
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| 引用本文： | 张瑞金,徐洪泉,张建光,徐国珍.水轮机压力脉动的测试分析与评价[J].水利水电技术,2003,34(11):76-78. |
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| 作者姓名： | 张瑞金 徐洪泉 张建光 徐国珍 |
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| 作者单位： | 1. 水利部,外资办公室,北京,100053
2. 中国水利水电科学研究院,北京,100038 |
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| 摘 要： | 近几年来,国内外一些新投入运行的大型电站在稳定性运行方面遇到了不少问题,有的已经解决,有的则还没有找到问题的原因,影响了电站的稳定运行。三峡水电站2003年已有多台机组投入运行,其将来能否安全稳定运行是人们共同关心和担心的问题。针对水轮机的稳定性问题,国内外进行了大量的研究工作,水轮机的压力脉动无疑是最受关注的问题之一。但是,
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| 关 键 词： | 水轮机 压力脉动 频谱分析 快速付里叶变换 |
| 文章编号： | 1000-0860(2003)11-0076-03 |
| 修稿时间： | 2003年5月26日 |
Analyzing and Evaluating on Pressure Fluctuation Measurement of Hydro Turbines |
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| Zhang Ruijin,Xu Hongquan,Zhang Jianguang,Xu Guozhen.Analyzing and Evaluating on Pressure Fluctuation Measurement of Hydro Turbines[J].Water Resources and Hydropower Engineering,2003,34(11):76-78. |
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| Authors: | Zhang Ruijin Xu Hongquan Zhang Jianguang Xu Guozhen |
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| Abstract: | The measurement position on pressure fluctuation acceptance test of hydro turbines should be located close to the outlet of wicket gate, because this position is near the sensitive region of vibration and similarity between prototype and model is better than that of the position on draft tube. The frequency resolution factor of Fast Fourier Transform (FFT) analysis of pressure fluctuation wave is equal to the reciprocal value of the total sampling time. For the lower frequency range,prolonging sampling time will increase the analysis precision, while for the higher frequency range, increasing the sampling points and shortening sampling time will increase the analysis precision. The transducer should be located near the main flow passage. The measurement tube can not be made of elastic materials. |
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| Keywords: | pressure fluctuation spectrum analysis Fast Fourier Transform (FFT) |
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