Low-head hydroelectric installation

Details Low-head hydroelectric installation Low-head hydroelectric installation

1985-02-25

1987-02-03

Hix, L. T.

Prime-mover dynamo plants

Turbogenerators

363165, 322 14, H01D 1510

Patent

active

046410406

ABSTRACT:
Low-head hydroelectric installation, in particular for a tidal power station, intended to operate under variable heads of water that can fall to values in the region of zero. When the head of water is lower than a defined value (Hd), lower than at least half the nominal head (Hn), the turbo-machine (1) is made to rotate at a speed (n1, n2, n2, . . . ) lower than the synchronous speed (ns) and bringing its efficiency near to the heart of the efficiency contours. For this purpose, a frequency converter (7) is inserted between the rotary electrical machine (3) and the network (4), the converter (7) being constructed for a power in all cases lower than at least half the nominal power (Pn).

REFERENCES:
patent: 1674610 (1928-06-01), Pfau
patent: 4367890 (1983-01-01), Spirk

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