Pump turbine

Details Pump turbine Pump turbine

2005-01-25

2005-01-25

Look, Edward K. (Department: 3745)

Rotary kinetic fluid motors or pumps

Method of operation

C415S910000

Reexamination Certificate

active

06846154

ABSTRACT:
In a pump turbine which can be operated in a pumping mode or a generating mode by switching the rotating direction of a runner, the discharge passing through the runner is adjusted based on a wicket gate opening; the speed of the runner is sensed; a target speed is temporarily set to a first speed different from a rated speed on generation starting; a response speed of a speed control via discharge adjusting means is controlled to a lower level after the speed reaches the target speed than that before the speed reaches the target speed; and finally, the target speed is slowly led to the rated speed, thus enhancing the stability of the speed when the turbine is started and enlarging a head range in which synchronization is achieved.

REFERENCES:
patent: 3236498 (1966-02-01), Kerensky
patent: 3309057 (1967-03-01), Tonooka
patent: 4201925 (1980-05-01), Kuwabara et al.

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