Shaft turning parking bus for multiple unit installations utiliz

Details Shaft turning parking bus for multiple unit installations utiliz Shaft turning parking bus for multiple unit installations utiliz

1976-05-10

1978-01-17

Schaefer, Robert K.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Connecting or disconnecting

290 52, H02J 300

Patent

active

040694240

ABSTRACT:
In an electrical power generating installation which includes a plurality of turbine-generator sets, a parking bus is disclosed, which is provided with a potential regulated at a relatively low and constant frequency of the order of 1-2 Hz. Switching and phase and frequency matching means are provided, which enable the same controlled variable frequency starting system used for start-up of the turbine-generator sets, to be used for gradually adjusting the rotational speed of a selected turbine-generator set to a point where phase and frequency may be matched with that of the parking bus, to then permit the generator member of such set to be electrically transferred to the bus. By means of such arrangement, any number of turbine-generator sets may be connected in parallel to the parking bus which thereupon effects a simultaneous, continued low speed rotation of the sets for cooling or other purposes. The sophisticated, complex, and costly start-up system, is thus freed of any requirement for continuing rotation of the sets during the long cool-down period, whereby in typical installations but a single such start-up system is required.

REFERENCES:
patent: 3543038 (1970-11-01), Putz et al.
patent: 3753002 (1973-08-01), Jacobsen et al.
patent: 3764815 (1973-10-01), Habock et al.

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