| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a water-power generation system using a squirrel-cage induction generator. <P>SOLUTION: The water-power generation system is provided with a water-mill 1, a pressure sensor 2a for measuring the entrance side pressure of the water-mill 1, a pressure sensor 2b for measuring the exit side pressure, the squirrel-cage induction generator 3 driven by the water-mill 1, a rectification step-up circuit 4, a smoothing capacitor 5, a diode rectifying circuit 6, and a rotational speed controller 8 for the generator 3. An intermediate speed between a non-restraint operation speed and an operation speed suitable for power generation in a pressure value of the water-mill 1 measured by the pressure sensor 2 is calculated by using each characteristic data of a non-restraint speed and a speed suitable for power generation for each pressure of the water-mill recorded in an internal storage device of the controller 8. An operation speed command as the intermediate speed is given to the generator 3. The water-power generation system is started in a state that regenerative power generated by a difference between the intermediate operation speed and the non-restraint operation speed is smaller than when the operation speed command is given at the speed suitable for power generation. After that, it is shifted to the suitable operation speed and the regenerative power is largely outputted. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
