| 摘要 |
The invention relates to a hydroelectric power plant which comprises a flow path having an upper water level and a lower water level, two turbines that are connected in series in the flow path, each comprising a rotor, a housing and a draft tube. The invention is characterized by the following features: the first machine when seen in the direction of flow is a radial-flow or semiaxial-flow or axial-flow turbine; the second machine when seen in the direction of flow is a radial-flow, semi-radial or axial-flow turbine. |
