Abstract
With the operation of giant unit of hydroelectric plant represented by the Three Gorges Power Station, the vibration problem of hydraulic turbine set unit is increasingly outstanding, especially the vibration of structure induced by pressure fluctuation. In order to guarantee the normal operation of unit, model test is more important in the respect of predicting performance, increasing stability and avoiding vibration. The pressure fluctuation measurement system based on LabVIEW according to pressure fluctuation model test was designed in this paper. The system is applied to the hydro-turbine model test-bed of HEC so that real-time automatic test with the characteristics of high stability and precision is implemented successfully. It plays an important role in respects of mastering the operation characteristics collecting and analyzing pressure fluctuation signals. Moreover it is meaningful to the hydraulic engineering.
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