| 摘要 |
PROBLEM TO BE SOLVED: To provide a reactive power compensating device which achieves low-distorted waveform and leveling voltage fluctuation without causing errors in the amount of compensation, even if system impedance and the like fluctuates on the power supply side. SOLUTION: This reactive power compensating device connecting a saturable reactor Lb and a capacitor C connected in parallel with each other between a system power supply Vs and a load 1, generating leading or lagging reactive power based on a power fluctuation in the load, canceling or suppressing the power fluctuation in the load for suppression or improvement of a receiving point voltage Vp fluctuation, is provided with a voltage-type converter 5 whose output side is serially-connected to a saturable reactor Lb for applying the desired voltage Vt to the saturable reactor Lb, a detection circuit 6 detecting power fluctuation in the load, and a compensation-amount computing circuit 7 determining the amount of compensation from the output of the detecting circuit 6, correcting an error between the outputted compensation current Ia and the amount of the determined compensation for the output control of a converter 5, and variably controls the voltage Vt for causing saturable reactor current It to vary. |
