Pump turbine
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United States of America Patent
Stats
-
Jan 25, 2005
Grant Date -
Oct 10, 2002
app pub date -
Mar 15, 2002
filing date -
Apr 5, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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