Islanding detection apparatus for a distributed generation...

Details Islanding detection apparatus for a distributed generation... Islanding detection apparatus for a distributed generation...

2006-10-12

2010-11-30

Fleming, Fritz M (Department: 2836)

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

C307S102000, C307S103000

Reexamination Certificate

active

07843082

ABSTRACT:
An islanding detection apparatus for a distributed generation power system and a detection method therefor operates a power converter to act as a virtual capacitor or inductor at a frequency close to but unequal to that of a utility power system under abnormal condition of the utility power system. When power failure occurs in the utility power system, only the distributed generation power system supplies power to a load so that a load voltage has been changed in at least one of amplitude and frequency which can be immediately detected islanding phenomenon.

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patent: 430731 (2001-04-01), None

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