Method of controlling wicket gates of a pump-turbine
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United States of America Patent
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-
May 10, 1983
Issued Date -
N/A
app pub date -
Sep 2, 1980
filing date -
May 20, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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