Method for operating pumps
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United States of America Patent
Stats
-
Jul 12, 1988
Grant Date -
N/A
app pub date -
Dec 29, 1980
filing date -
Dec 28, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for operating pumps in a pumping-up power plant having a single speed reversible pump-turbine and a booster pump, the booster pump being provided in a branch pipe which is provided in parallel with a portion of a draft tunnel between the pump-turbine and a lower reservoir, is disclosed. The method includes the steps of, closing guide vanes of the pump-turbine, opening the portion of the draft tunnel which runs in parallel with the branch pipe, closing the branch pipe, then starting the pump-turbine in air as a pump, and starting the booster pump. After the rotational speed of the pump-turbine reaches a predetermined value and the rotational speed of the booster pump reaches a predetermined value, the method also includes the steps of, starting exhaustion of the air remaining inside the pump-turbine, closing the portion of the draft tunnel, opening the branch pipe, and opening the guide vanes of the pump-turbine after completion of the exhaustion and completion of closing the portion of the draft tunnel.
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