| 摘要 |
<p>PURPOSE:To adjust without step a water-distribution pressure by comparing primary side pressure with secondary side pressure of a pump, and switching over an output circuit of a generator properly to supply electric energy to the generator. CONSTITUTION:Water stored in a water distribution pond 1 is supplied to a contour water distribution block 4 through a water distribution main pipe 2. Pressure and water distribution block supply pressure in their heads of natural flow-down from a primary pressure gauge 21 and a secondary pressure gauge 22 is inputted to a controller 23. In addition, the controller 23 calculates difference between two pressure, and in the case it is less than pre-determined value set in advance, an operation mode of a pump main body 3 is controlled in a booster mode, and a power driving command is outputted to an AC/DC converter 24. In the case difference between two pressure is in excess of the pre-determined value, the operation mode is controlled in a pressure reduction mode, and a brake driving command is outputted to a controller 8.</p> |
