No break power transfer control for a VSCF power generating syst

Details No break power transfer control for a VSCF power generating syst No break power transfer control for a VSCF power generating syst

1989-01-23

1990-06-26

Leung, Philip H.

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

307 46, 307 87, 363 95, H02J 906, H02J 900

Patent

active

049374621

ABSTRACT:
In aircraft applications, it may be necessary or desirable to transfer one or more loads between a variable speed, constant frequency (VSCF) power generating system and a further source of AC power. Prior controls for effecting such transfer, however, have been unduly complex. In order to overcome this problem, a control for a VSCF system senses the deviation of a parameter of the power developed by an inverter of the system relative to a parameter of the power developed by an AC power source and controls the inverter in accordance with such deviation to cause the parameter of the power developed thereby to approach the parameter of the power developed by the AC power source. The inverter and the AC power source are connected in parallel across one or more loads when the parameter deviation is within a certain range. Either the inverter or the AC power source is thereafter disconnected a certain time after the two were connected in parallel to complete the power transfer.

REFERENCES:
patent: 3932764 (1976-01-01), Corey
patent: 4516035 (1985-05-01), Rhoads et al.
patent: 4572961 (1986-02-01), Borger
patent: 4695776 (1987-09-01), Dishner et al.
patent: 4703193 (1987-10-01), Kawabata
patent: 4731690 (1988-03-01), Beg et al.
patent: 4782241 (1988-11-01), Baker et al.
Mehl et al., "A Minimum Interruption AC Electric Power Generating System for Avionics", presented by the American Institute of Aeronautics and Astronautics, 1984.

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