Electricity: power supply or regulation systems – For reactive power control
Reexamination Certificate
2008-08-11
2011-12-13
Berhane, Adolf (Department: 2838)
Electricity: power supply or regulation systems
For reactive power control
C323S209000, C323S211000
Reexamination Certificate
active
08076910
ABSTRACT:
Automated power factor correction analysis methods based on an automatically determined hierarchy representing how IEDs and transformers are linked together in an electrical system for reducing a utility bill, releasing capacity to the electrical system, reducing losses, and/or improving voltages. The automatically determined hierarchy places the system elements in spatial context and is exploited by the power factor correction analysis methods to identify power factor correction opportunities. Recommendations are made as to sizing and location of capacitors within the hierarchy where power factor improvements can be achieved. Harmonic distortion levels can be checked first to determine whether safe levels exist for capacitor banks. Recommendations are also checked to avoid leading power factors anywhere in the system due to the addition of capacitor banks. Capacitor bank location is tailored to the end-user's goal for power factor correction. Cost savings and payback periods associated with any ameliorative power factor correction activities are also determined.
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Berhane Adolf
Schneider Electric USA , Inc.
Tran Nguyen
LandOfFree
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