| 摘要 |
PURPOSE:To permit proper flow amount regulation control by a method wherein the movable guide vane of either one of highest pressure stage or lowest pressure stage is controlled so that a relative difference between an actual flow amount and an objective flow amount enters within a specified range 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 through a control unit 21 in accordance with the objective flow amount 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). The opening degree of the low pressure stage movable guide vane 12 is controlled so that the relative difference or a relative ratio of the actual opening degree (a) of said vane 12 and said opening degree (ao) enters within a specified range. |
