| 摘要 |
PURPOSE:To suppress voltage fluctuation within a prescribed value without increasing inverter capacity for larger load fluctuation in a device for outputting a compensation current by an inverter with a detected load current as a control current reference and suppressing the voltage fluctuation of a system provided with an unbalanced load. CONSTITUTION:From a current component iq1 (equivalent to the fundamental wave wattless positive phase components in a 3-phase AC current) separated in a filter 16, a capacitor current part iqC is subtracted in a subtractor 21 and further, a bias part IqB is subtracted in the subtractor 22. Thus, a voltage difference between the time of a high load and the time of a light load is reduced in corresponding to the bias part and the voltage fluctuation is suppressed. |
