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

27th IAHR Symposium on Hydraulic Machinery and Systems

Kanemoto, T.^1 ; Honda, H.^2 ; Kasahara, R.^2 ; Miyaji, T.^2

Faculty of Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan^1

Graduate School of Engineering, Kyushu Institute of Technology, Kitakyushu, Fukuoka, Japan^2

关键词: Counter rotating;    Hydraulic efficiency;    Hydroelectric units;    Operating modes;    Power stabilization;    Pumped Storage;    Renewable resource;    Rotational speed;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/22/1/012032/pdf
DOI  :  10.1088/1755-1315/22/1/012032

来源: IOP

【 摘 要 】

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.