Electrical transmission or interconnection systems – Plural supply circuits or sources – Plural generators
Reexamination Certificate
2007-10-31
2010-02-02
Deberadinis, Robert L. (Department: 2836)
Electrical transmission or interconnection systems
Plural supply circuits or sources
Plural generators
Reexamination Certificate
active
07656060
ABSTRACT:
A method of operating a power system is provided. The power system has a plurality of generator sets and a bus. The method monitors the bus and generator sets disconnected from the bus. The method supplies to a control device information associated with the operating state of each of the generator sets and the bus. The method determines a relative frequency mismatch and a relative phase mismatch between the frequency and phase of the bus and a generator, and generates a frequency speed bias and a phase speed bias for the generator. The method adds the frequency and phase speed biases to form a total speed bias, tunes the total speed bias to make the frequency and phase speed biases combine in a complementary manner, and connects the generator to the bus when the voltage, frequency, and phase of the generator are within a permissible range of the bus.
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Caterpillar Inc.
Deberadinis Robert L.
Finnegan Henderson Farabow Garrett & Dunner
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