Electricity: power supply or regulation systems – For reactive power control – Using converter
Patent
1994-06-30
1996-01-16
Nguyen, Matthew V.
Electricity: power supply or regulation systems
For reactive power control
Using converter
323205, G05F 170, G05F 300
Patent
active
054850754
ABSTRACT:
A self-commutated static var compensator and a method is used for stabilizing a power system by controlling an output of a self-commutated converter for receiving/supplying power from/to the power system. A constant system voltage maintaining controller calculates a first target value signal of the reactive current in accordance with a difference between a reference voltage and a voltage detected by a voltage detector, and a reactive current controller generates a second target value signal of the reactive current in accordance with a difference between the first target value signal of the reactive current and a detected current. A converter controller applies a gate driving pulse to the self-commutated converter in response to the second target value signal of the reactive current and second target value signal of the active current. A loss reduction circuit stops the gate driving pulse corresponding to the second target value of the reactive current from being supplied to the gate of the self-commutated converter when reactive power output from the self-commutated converter is close to zero.
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Ichikawa Fumitoshi
Mori Takashi
Kabushiki Kaisha Toshiba
Nguyen Matthew V.
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