Phase control switching device

Details Phase control switching device Phase control switching device

2011-05-03

2011-05-03

Fleming, Fritz M (Department: 2836)

Electrical transmission or interconnection systems

Switching systems

Condition responsive

C307S116000, C307S125000

Reexamination Certificate

active

07936093

ABSTRACT:
In a phase control switching device that controls a closing phase of a three-phase switching device connected between a power-supply-side transmission line and a compensation transmission line having a shunt reactor, a closing-phase control unit operates based on a closing command to the three-phase switching device, generates, for each phase, a closing phase in which the three-phase switching device is closed at zero points, both polarities of which are inverted into the same polarity, among zero points where zero points of a voltage changing ratio and zero points of the shunt reactor current coincide with each other, and controls the three-phase switching device.

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Written Opinion (PCT/ISA/210) dated May 15, 2007.
Decision of a Patent Grant in corresponding JP application issued Feb. 25, 2011, and English-language translation, 3 pages.

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