Electricity: power supply or regulation systems – For reactive power control – Using impedance
Patent
1998-05-11
1999-10-05
Berhane, Adolf Deneke
Electricity: power supply or regulation systems
For reactive power control
Using impedance
G05F 170
Patent
active
059630213
ABSTRACT:
A transient reducing capacitor switching device that switches grounded capacitors into a multi-phase power line, wherein each phase of the line carries an AC voltage signal that cycles its polarity. A first switch is associated with a first grounded capacitor, a second switch is associated with a second grounded capacitor and a third switch is associated with a third grounded capacitor. A switch controller switches the first capacitor into the first phase of the power line substantially when the voltage signal in the first phase crosses zero potential. The switch controller has a delay that delays at least one-quarter of one cycle after the first capacitor was switched into the first phase, then switches the second capacitor into the second phase of the line substantially when the voltage signal in the second phase crosses zero potential. The switch controller then delays at least another one-quarter of one cycle after the second capacitor was switched into the second phase, then switches the third capacitor into the third phase of the line substantially when the voltage signal in the third phase crosses zero potential.
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Berkebile Lee E.
Rostron Joseph P.
Berhane Adolf Deneke
Siemens Power Transmission & Distribution, LLC
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