Pump-turbine

Details Pump-turbine Pump-turbine

1998-02-27

2000-03-28

Look, Edward K.

Rotary kinetic fluid motors or pumps

With control means responsive to non-cyclic condition...

By shaft speed or torque responsive means

415 1, 415 13, 415 14, 415 15, 415 16, 415 17, 415 24, 415 26, 415 42, 415 43, 415 48, 415 50, 415910, F01B 2526

Patent

active

060423315

ABSTRACT:
An upper reservoir-side conduit or a lower reservoir-side conduit is branched in the vicinity of pump-turbine ends and at least a first pump-turbine out of a plurality of pump-turbines which share the conduit portions located farther than the branch points with the other pump-turbine or pump-turbines is provided with a rotational speed increase detector. When it is detected that the rotational speed of the first pump-turbine has exceeded a second predetermined value higher than a rated speed, a command is issued also to at least one of the other pump-turbines to limit the guide vane closing speed in that pump-turbine to a speed approximately equal to or lower than the speed after the shift to a slow closing of the guide vanes.

REFERENCES:
patent: 4253794 (1981-03-01), Kuwabara
patent: 4354800 (1982-10-01), Kuwabara
patent: 4382745 (1983-05-01), Kuwabara
patent: 4624622 (1986-11-01), Kuwabara

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