Water-driven machine set with the speed reference value set for

Details Water-driven machine set with the speed reference value set for Water-driven machine set with the speed reference value set for

1987-01-02

1989-02-21

Shoop, Jr., William M.

Prime-mover dynamo plants

Electric control

Fluid-current motors

290 52, F03B 1502

Patent

active

048067814

ABSTRACT:
A machine set (1) consists of a water-driven turbine (11) and a generator (12) coupled thereto. The generator feeds a network of constant frequency (3) via a frequency-controlled converter (2). The speed reference value (n*) of the machine set is given by means simulating turbine characteristics (4) in dependence on two characteristic quantities (a.sub.o or .PHI.) with optimum efficiency and is finely optimized (n) preferably by a maximum power-point control (5). The upper and lower water level (L.sub.u, L.sub.H) can be preset, in a single or double-action controlled turbine (11) additionally by a control device (6) if one of the two characteristic quantities (a.sub.o or .PHI., respectively) is used as a control signal for the nozzle orifice or the aperture at the guide wheel or rotor. Advantageously, in the case of the double-controlled turbine, the characteristic quantity not needed for the level control is slaved as a further control signal with the optimum efficiency, and the characteristic quantity used for the level control is limited.

REFERENCES:
patent: 4367890 (1983-01-01), Spirk
patent: 4400659 (1983-08-01), Barron et al.
patent: 4475334 (1984-10-01), Kuwabara
patent: 4533835 (1985-08-01), Beckwith
patent: 4641040 (1987-02-01), Megnint
patent: 4674279 (1987-06-01), Ali et al.

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