JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Improved prediction of Pump Turbine Dynamic Behavior using a Thoma number dependent Hill Chart and Site Measurements
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Improved prediction of Pump Turbine Dynamic Behavior using a Thoma number dependent Hill Chart and Site Measurements
Manderla, Maximilian; Kiniger, Karl N.; Koutnik, Jiri;
  PDF(new window)
 Abstract
Water hammer phenomena are important issues for the design and the operation of hydro power plants. Especially, if several reversible pump-turbines are coupled hydraulically there may be strong unit interactions. The precise prediction of all relevant transients is challenging. Regarding a recent pump-storage project, dynamic measurements motivate an improved turbine modeling approach making use of a Thoma number dependency. The proposed method is validated for several transient scenarios and turns out to improve correlation between measurement and simulation results significantly. Starting from simple scenarios, this allows better prediction of more complex transients. By applying a fully automated simulation procedure broad operating ranges of the highly nonlinear system can be covered providing a consistent insight into the plant dynamics. This finally allows the optimization of the closing strategy and hence the overall power plant performance.
 Keywords
pump turbine;hydraulic transients;turbine modelling;draft tube pressure;Thoma number;automated simulation;
 Language
English
 Cited by
1.
S-shaped characteristics on the performance curves of pump-turbines in turbine mode – A review, Renewable and Sustainable Energy Reviews, 2016, 60, 836  crossref(new windwow)
 References
1.
Nicolet C., Alligne S., Bergant A. and Avellan F., 2011, "Parametric study of water column separation in Francis pumpturbine draft tube," SHF: Pumped storage Powerplants.

2.
Murai H., 1980, "Hydrodynamic Topics in Developments of High Head Pump-Turbines and Investigations on Related Problems in Japan," IAHR.

3.
Nicolet C., 2007, "Hydroacoustic modeling and numerical simulation of unsteady operation of hydroelectric systems," Thesis EPFL $n^{\circ}$ 3751, http://simsen.epfl.ch/

4.
Pejovic S., Zhang Q. Z., Karney B. and Gajic A., 2011, "Analysis of Pump-Turbine "S" Instability and Reverse Waterhammer Incidents in Hydropower Systems," 4-th International Meeting on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems.

5.
Martin C. S., 2000, "Instability of Pump-Turbines with S-shaped Characteristics," Proceedings of the 20th IAHR Symposium on Hydraulic machinery and systems.

6.
Klemm D., 1982, "Stabilizing the characteristic of a pumped turbine in the range between turbine part load and reverse pump operation," Voith Research and Construction.

7.
You G., Kong L. and Liu D., 2006, "Pump-turbine S zone and its effect at Tianhuangping pumped storage power plant," Journal of Hydroelectric Engineering.

8.
Landry C., Alligne S., Hasmatuchi V., Roth S., Mueller A. and Avellan F., 2010, "Non-Linear Stability of a Reduced Scale Model Pump-Turbine at Off-Design Operation," IAHR.

9.
Nicolet C., Allinge S., Kawkabani B., Koutnik J., Simond J. and Avellan F., 2009, "Stability Study of Francis Pump-Turbine at runaway," 3rd IAHR International Meeting of the Workgroup on Cavitation and Dynamic Problems in Hydraulic Machinery and Systems.

10.
Kiniger K. N. and List B., 2012, "Strategies for Avoidance of Transient Low Pressure in Complex Pump-Turbine Schemes," 17th International Seminar on Hydropower Plants, Vienna, 2012.

11.
Fang Y. and Koutnik J., 2012, "The Numerical Simulation of the Delayed Load Rejection of a Pump-turbine Powerplant," IAHR.

12.
Kiniger K. N., Manderla M., List B. and Koutnik J., 2014, "Improved Prediction of Transients in Complex Pump-Turbine Schemes using a Refined Simulation Model based on Prototype Measurements," 18th International Seminar on Hydropower Plants, Vienna, 2014.