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

1980-09-02

1983-05-10

Powell, Jr., Everette A.

Rotary kinetic fluid motors or pumps

Method of operation

415500, F03B 310, F03B 1502

Patent

active

043827454

ABSTRACT:
A method of controlling wicket gates of a pump-turbine which prevents abnormal hydraulic pressure variation when load carried on the pump-turbine is removed during the turbine operation thereof. The wicket gates are controlled to open when it is detected that discharge per unit head reduces with the reduction of speed per unit head. When it is once detected that the ratio of variation in the discharge per unit head to the variation in the speed per unit head is reversed from a positive value to a negative value, the wicket gates are closed.

REFERENCES:
patent: 3030070 (1962-04-01), Krauss
patent: 3063460 (1962-11-01), Krauss
patent: 3275293 (1966-09-01), Hosogai et al.
patent: 3339567 (1967-09-01), Fukasu et al.
patent: 3403888 (1968-10-01), Hartland
patent: 3452962 (1969-07-01), Willi
patent: 3886373 (1975-05-01), Okada
patent: 4014624 (1977-03-01), Takase et al.
patent: 4073594 (1978-02-01), Takagi et al.
patent: 4201925 (1980-05-01), Kuwabara et al.
patent: 4253794 (1981-03-01), Kuwabara

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