| 摘要 |
PURPOSE:To permit proper flow amount regulation control by a method wherein either one of the guide vanes of highest pressure stage or lowest pressure stage is set at an objective flow amount corresponding opening degree and the other guide vane is set at a predetermined opening degree in case the control to regulate the flow amount into the objective flow amount is effected upon a stationary operation. CONSTITUTION:When the flow amount regulation control is effected under the stationary operation of a Francis type two-stage pump water wheel, having the high pressure stage runner 2 and the low pressure stage runner 3, the objective guide vane opening degree Ao is determined at first by an operational control unit 18 in accordance with the objective flow anount Qo from an objective flow amount inputting unit 20 based on the data specifying a relation between a flow amount Q set by a data inputting device 19 and the opening degree Ao of the guide vane, thereafter, the opening degree of the high pressure stage movable guide vane 15 is set in accordance with the same opening degree Ao. Then, the opening degree (a) of the guide vane 12 is set so that said opening degree Ao and the opening degree of the low pressure stage movable guide vane 12 satisfy the relation of relative opening degrees by utilizing the water level difference of upper and lower ponds, which is detected by a water level detecting device 17. |
