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Energies 2016, 9(3), 199; doi:10.3390/en9030199

Measuring the Dynamic Characteristics of a Low Specific Speed Pump—Turbine Model

1
Waterpower Laboratory, NTNU, Alfred Getz vei 4, Trondheim 7491, Norway
2
Rainpower, S.P.Andersen vei 7, Trondheim 7031, Norway
*
Author to whom correspondence should be addressed.
Academic Editors: Ånund Killingtveit and Juan Ignacio Pérez-Díaz
Received: 29 January 2016 / Revised: 4 March 2016 / Accepted: 7 March 2016 / Published: 15 March 2016
(This article belongs to the Special Issue Hydropower)
View Full-Text   |   Download PDF [706 KB, uploaded 15 March 2016]   |  

Abstract

This paper presents results from an experiment performed to obtain the dynamic characteristics of a reversible pump-turbine model. The characteristics were measured in an open loop system where the turbine initially was run on low rotational speed before the generator was disconnected allowing the turbine to go towards runaway. The measurements show that the turbine experience damped oscillations in pressure, speed and flow rate around runaway corresponding with presented stability criterion in published literature. Results from the experiment is reproduced by means of transient simulations. A one dimensional analytical turbine model for representation of the pump-turbine is used in the calculations. The simulations show that it is possible to reproduce the physics in the measurement by using a simple analytical model for the pump-turbine as long as the inertia of the water masses in the turbine are modeled correctly. View Full-Text
Keywords: reversible pump-turbine; stability; transient calculations reversible pump-turbine; stability; transient calculations
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Walseth, E.C.; Nielsen, T.K.; Svingen, B. Measuring the Dynamic Characteristics of a Low Specific Speed Pump—Turbine Model. Energies 2016, 9, 199.

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