Operation of the counter-rotating type pump-turbine unit installed in the power stabilizing system

This serial research intends to put a unique power stabilization system with a pumped storage into practical use. The pumped storage is equipped with a counter-rotating type pump-turbine unit whose operating mode can be shifted instantaneously in response to the fluctuation of power from renewable r...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2014-01, Vol.22 (1), p.12032-12039
Main Authors: Kanemoto, T, Honda, H, Kasahara, R, Miyaji, T
Format: Article
Language:English
Subjects:
Constants
Fluctuation
Fluid dynamics
Fluid flow
Pumped storage
Renewable resources
Rotation
Rotational
Serials
Stabilization
Sustainable yield
Turbines
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Summary:This serial research intends to put a unique power stabilization system with a pumped storage into practical use. The pumped storage is equipped with a counter-rotating type pump-turbine unit whose operating mode can be shifted instantaneously in response to the fluctuation of power from renewable resources. This paper verifies that the system is reasonably effective to stabilize the fluctuating power. It is necessary to quickly increase the rotational speed when the operation is shifted from the turbine to the pumping modes, because the unit cannot pump-up water from a lower reservoir at a slow rotational speed while keeping gross/geodetic head constant. The maximum hydraulic efficiency at the turbine mode is close to the efficiency of the counter-rotating type hydroelectric unit designed exclusively for the turbine mode. The system is also provided for a pilot plant to be operated in the field.
ISSN:1755-1315
1755-1307
1755-1315
DOI:10.1088/1755-1315/22/1/012032