Interconnecting power generation system

Details Interconnecting power generation system Interconnecting power generation system

2007-06-19

2007-06-19

Jackson, Stephen W. (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

Reexamination Certificate

active

10731879

ABSTRACT:
To provide an interconnecting power generation system which can detect an abnormality in the utility power supply and can be isolated from a utility power system and can prevent damage to a turbogenerator.An interconnecting power generation system comprises: an interconnecting inverter14; a voltage phase shift circuit20which synchronizes the output voltage phase of the interconnecting inverter14with the utility power voltage phase and monitors zero crossings of the utility power voltage, and which shifts the output voltage phase from the utility power voltage phase and shifts the shifted output voltage phase to the utility power voltage phase; a phase comparator24for comparing the voltage phase of the utility power system10and the output voltage phase of the interconnecting inverter; and an interconnection control unit30which detects a power outage caused by an interruption of power supply from the utility power system10based on a series of a predetermined number of matching signals outputted from the phase comparator24and sends a control signal to a circuit breaker22to shut off the output of the interconnecting inverter14from the utility power system10.

REFERENCES:
patent: 5798631 (1998-08-01), Spee et al.
patent: 6411065 (2002-06-01), Underwood et al.
patent: 6487096 (2002-11-01), Gilbreth et al.
patent: 2002/0060556 (2002-05-01), Wall
patent: 6-38696 (1989-04-01), None
patent: 3142029 (1994-04-01), None
patent: 3127250 (1995-01-01), None
patent: PCT/JP2003/010564 (2002-08-01), None

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