Method of controlling wicket gates of a pump-turbine

Details Method of controlling wicket gates of a pump-turbine Method of controlling wicket gates of a pump-turbine

1978-09-07

1981-03-03

Powell, Jr., Everette A.

Rotary kinetic fluid motors or pumps

Method of operation

415 36, F03B 1502

Patent

active

042537940

ABSTRACT:
A method of controlling the wicket gates of a pump-turbine having in the turbine operation area S-section where discharge per unit head and torque per unit head reduce with the reduction of speed per unit head. The pump-turbine is incorporated in a hydraulic system together with at least one of other pump-turbines. A penstock includes a plurality of pipelines each extending from the upstream side of each of the pump-turbines, while a tailrace includes a plurality of pipelines each extending from the downstream side of each of the pump-turbines; and at least one of the upstream ends of the pipelines of the penstock and the downstream ends of the pipelines of the tailrace are connected to a common pipeline. Upon sudden removal of load from the pump-turbine having the S-section, the wicket gates are closed at an earlier timing so that the hydraulic pressure in the penstock may reach the maximum value before the pump-turbine initiates to operate in the S-section.

REFERENCES:
patent: 3275293 (1966-09-01), Hosogai et al.
patent: 3339567 (1967-09-01), Fukasu et al.
patent: 3403888 (1968-10-01), Hartland

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