论文信息 - STUDY OF CAVITATION IN PUMP-STORAGE HYDRO POWER PLANT PROTOTYPE

STUDY OF CAVITATION IN PUMP-STORAGE HYDRO POWER PLANT PROTOTYPE

An experimental investigation has been made to detect cavitation in pump – storage hydro power plant prototype suffering from cavitation in pump mode. Vibrations and acoustic emission on the housing of turbine bearing and pressure fluctuations in the draft tube were measured and the corresponding signals have been recorded and analyzed. The analysis was based on the analysis of high-frequency content of measured variables. The pump – storage hydro power plant prototype has been operated at various input loads and Thoma numbers. Several estimators of cavitation were evaluated according to coefficient of determination between Thoma number and cavitation estimators. The best results were achieved with a compound discharge coefficient cavitation estimator. Cavitation estimators were evaluated in several intervals of frequencies.

Marko Hočevar | Tine Cencič

[1] Kazuyoshi Miyagawa,et al. STUDY OF CAVITATION EROSION ON HYDRAULIC TURBINE RUNNERS , 2003 .

[2] François Avellan,et al. Introduction to Cavitation in Hydraulic Machinery , 2004 .

[3] Shu-Qing Wang,et al. Cavitations Monitoring and Diagnosis of Hydropower Turbine on Line Based on Vibration and Ultrasound Acoustic , 2007, 2007 International Conference on Machine Learning and Cybernetics.

[4] Xavier Escaler,et al. CAVITATION MONITORING OF HYDROTURBINES: TESTS IN A FRANCIS TURBINE MODEL , 2006, CAV 2006.

[5] Eduard Egusquiza,et al. Detection of cavitation in hydraulic turbines , 2006 .

[6] M. Novak,et al. Monitoring of the cavitation in the Kaplan turbine , 1999, ISIE '99. Proceedings of the IEEE International Symposium on Industrial Electronics (Cat. No.99TH8465).

[7] François Avellan,et al. VIBRATION CAVITATION DETECTION USING ONBOARD MEASUREMENTS , 2003 .

[8] François Avellan,et al. Classification of Cavitation in Hydraulic Machines using Vibration Analysis , 2002 .

[9] Huixuan Shi,et al. Experimental Investigations on Cavitation in Large Kaplan Turbines , 2011, 2011 Third International Conference on Measuring Technology and Mechatronics Automation.

[10] Brane Širok,et al. An investigation of the relationship between acoustic emission, vibration, noise and cavitation structures on a Kaplan turbine , 2007 .