Electricity: power supply or regulation systems – For reactive power control – Using converter
Reexamination Certificate
2006-01-10
2006-01-10
Nguyen, Matthew V. (Department: 2838)
Electricity: power supply or regulation systems
For reactive power control
Using converter
C323S208000
Reexamination Certificate
active
06984962
ABSTRACT:
A device for control of a compensator connected to a polyphase electric transmission network for reactive electric power in dependence on a voltage sensed in the transmission network. A voltage controller, in dependence on the difference of a reference value for the voltage and its sensed value, forms a reference value for a reactive power flow through the compensator. A transformation element represents the sensed voltage as a voltage vector in a rotating two-phase system of coordinates and forms a compensation signal in dependence on a sensed change of the angular position of the voltage vector in the two-phase system of coordinates. A summation element forms the reference value for reactive power flow through the compensator in dependence on the compensation signal.
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Ängquist Lennart
Thordvaldsson Björn
ABB AB
Franklin Eric J.
Nguyen Matthew V.
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