Battery/mains generator set for the production of interruption-f

Details Battery/mains generator set for the production of interruption-f Battery/mains generator set for the production of interruption-f

1978-09-01

1980-05-13

Hix, L. T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 68, 307 46, 322 16, H02J 906

Patent

active

042030412

ABSTRACT:
A battery/mains generator set for the production of a continuing electricity supply in the event of failure of the mains supply, the set comprising an a.c. machine capable of operating either as a generator or as a motor and, mechanically coupled thereto, a d.c. machine also operable either as a generator or as a motor, the a.c. machine being, in operation, permanently connected, with the mains supply through a static switch, which prevents back-flow of power into the mains, the a.c. machine, when mains driven, being operable as a motor and driving the d.c. machine, which then operates as a generator and charges a battery in accordance with a required I/V characteristic curve, and, on failure of the mains supply, the d.c. machine being operable as a motor powered by the battery to drive the a.c. machine as a generator, thereby providing an output supply to an external load in place of the mains supply, the set also including a current transformer connected to pass the reactive current flowing between the mains and the a.c. machine or the external load and to supply a potential regulator connected to control a controllable exciter winding of the a.c. machine, whereby the a.c. machine will be operated in accordance with the requirement of the external load for reactive power during mains operation.

REFERENCES:
patent: 3142793 (1964-07-01), Grillo
patent: 3514625 (1970-05-01), Lane
patent: 3609426 (1971-10-01), Gaul

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