Method and apparatus for power inverter synchronization

Details Method and apparatus for power inverter synchronization Method and apparatus for power inverter synchronization

2007-02-27

2007-02-27

Mullins, Burton S. (Department: 2836)

Electrical transmission or interconnection systems

Plural load circuit systems

Plural sources of supply

C307S031000, C307S051000

Reexamination Certificate

active

10741905

ABSTRACT:
A control circuit synchronizes an ac power inverter to the mains voltage of an electrical grid by matching the fundamental phasor components of the inverter's output voltage to the fundamental phasor components of the mains voltage. Once such matching meets an acceptable voltage error threshold, the control circuit initiates contactor closure, verifies contactor closure, and then initiates a changeover from voltage-mode control used in synchronization operations to a current-mode control of the inverter's output. The control circuit provides corresponding disconnection control when disconnection from the grid is desired, wherein the regulated power of the inverter is ramped down in controlled fashion until it reaches a lower threshold whereupon contactor opening is initiated. Once contactor opening is verified, regulation control reverts to stand-alone voltage mode control or to shut down, as needed or desired.

REFERENCES:
patent: 5255176 (1993-10-01), Hatta et al.
patent: 5642006 (1997-06-01), Cech
patent: 6072302 (2000-06-01), Underwood et al.
patent: 6198176 (2001-03-01), Gillette
patent: 6219623 (2001-04-01), Wills
patent: 6304468 (2001-10-01), Ichinose et al.
patent: 6380719 (2002-04-01), Underwood et al.
patent: 7015597 (2006-03-01), Colby et al.
patent: 2001/0048290 (2001-12-01), Underwood et al.
patent: 2001/0052704 (2001-12-01), Bosley et al.
patent: 4011049 (1991-10-01), None
patent: 19949997 (2001-06-01), None
patent: 2831349 (2003-04-01), None
patent: 08103085 (1996-04-01), None
patent: 2001 231157 (2001-08-01), None

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