Data processing: generic control systems or specific application – Specific application – apparatus or process – Electrical power generation or distribution system
Reexamination Certificate
2011-01-25
2011-01-25
Bahta, Kidest (Department: 2123)
Data processing: generic control systems or specific application
Specific application, apparatus or process
Electrical power generation or distribution system
C702S061000
Reexamination Certificate
active
07877169
ABSTRACT:
There is provided herein methods and apparatus for apparatus for controlling the interconnection of an auxiliary AC generator with an electrical system, such as an electrical distribution system, e.g., a utility grid. A measuring circuit measures the frequency of an auxiliary AC generator and the phase angle between one voltage phase of the generator and the correspondent voltage phase of the electric utility's electricity supply lines, i.e., the grid, each of which are averaged and filtered. The measured frequency of the auxiliary AC generator is matched to the frequency of the electrical system and the measured phase angle of the generator is matched to the electric utility's electricity supply lines. Once matching is achieved to within a defined tolerance, interconnecting contactors are closed.
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Chen Henry (Ying Hong)
Slota Frederick B.
Bahta Kidest
Electro Industries / Gauge Tech
Hespos Gerald E.
Porco Michael J.
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