Electricity: single generator systems – Automatic control of generator or driving means – Plural conditions
Reexamination Certificate
2011-05-24
2011-05-24
Cuevas, Pedro J. (Department: 2839)
Electricity: single generator systems
Automatic control of generator or driving means
Plural conditions
C290S044000, C361S062000
Reexamination Certificate
active
07948217
ABSTRACT:
A distributed generation system that can suppress a voltage fluctuation caused by a distributed generation by an apparatus of a small power capacity in the distributed generation itself and stabilize the power system voltage without inserting interharmonic voltage or current into the power system and without interference among a plurality of distributed generations. Parameter α(t) varying with time is estimated based on fluctuating component ΔP of the active power P generated by the distributed generation and the voltage fluctuating component ΔV attributable to the distributed generation developed at the point of connection between the distributed generation and power system. The distributed generation produces reactive power Q=−αP or Q=−αΔP, to thereby suppresses only the voltage fluctuation of the power system attributable to the distributed generation.
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Fukuda Shoji
Futami Motoo
Ichinose Masaya
Matsutake Mitsugu
Oohara Shinya
Antonelli, Terry Stout & Kraus, LLP.
Cuevas Pedro J.
Hitachi , Ltd.
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