Reactive power controller without initial abrupt disturbance on power source
First Claim
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1. A reactive power controller, comprising:
- self-commutated inverter means, including controllable rectifier elements and diodes, for generating a reactive power;
a DC voltage capacitor connected in parallel to the self-commutated inverter means;
a coupling reactor connected between the self-commutated inverter means and an AC system power source;
producing means for producing a modulation control signal indicating amounts to be adjusted of an amplitude and a phase of an output AC voltage of the self-commutated inverter means, in accordance with a DC voltage across the DC voltage capacitor and an AC voltage from the AC system power source; and
adjusting means for adjusting the amplitude and the phase of the output AC voltage of the self-commutated inverter means in accordance with the modulation control signal from the producing means such that reactive power from the self-commutated inverter means at a starting moment of operation of the reactive power controller is suppressed.
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Abstract
A reactive power controller for controlling a reactive power output from a self-commutated inverter capable of eliminating an uncontrolled reactive power at the starting moment of its operation. The reactive power controller includes a device for producing a signal indicating amounts to be adjusted of an amplitude and a phase of an output AC voltage of the self-commutated inverter, in accordance with a DC voltage over a DC capacitor and an AC voltage of an AC system power source, and a device for adjusting the amplitude and the phase of the output AC voltage of the self-commutated inverter in accordance with the indication of the producing device.
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6 Claims
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1. A reactive power controller, comprising:
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self-commutated inverter means, including controllable rectifier elements and diodes, for generating a reactive power; a DC voltage capacitor connected in parallel to the self-commutated inverter means; a coupling reactor connected between the self-commutated inverter means and an AC system power source; producing means for producing a modulation control signal indicating amounts to be adjusted of an amplitude and a phase of an output AC voltage of the self-commutated inverter means, in accordance with a DC voltage across the DC voltage capacitor and an AC voltage from the AC system power source; and adjusting means for adjusting the amplitude and the phase of the output AC voltage of the self-commutated inverter means in accordance with the modulation control signal from the producing means such that reactive power from the self-commutated inverter means at a starting moment of operation of the reactive power controller is suppressed. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification