Shaft turning parking bus for multiple unit installations...

H - Electricity – 02 – J

Patent

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322/3.3

H02J 3/38 (2006.01) H02P 9/08 (2006.01)

Patent

CA 1085452

ABSTRACT OF DISCLOSURE 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, upon which the generator member of such set is 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 there- upon 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 requi- rement 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.

268711

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