Patent ID: 8970154
Filing Date: 2015-03-03
Classification: H02M,H02P

Abstract:
1. A power conversion apparatus comprising: a converter connected between an AC power supply and a DC link section, for converting AC power of the AC power supply to DC power and outputting the DC power to the DC link section; an inverter connected between the DC link section and an AC load, for converting DC power of the DC link section to AC power and supplying the AC power to the AC load; a capacitor connected in the DC link section; and a control section for controlling the inverter based on a voltage instruction, wherein the power conversion apparatus includes: a voltage detection section for detecting voltage of the DC link section; a filter section for extracting an AC component of the voltage detected by the voltage detection section; and a gain section for multiplying the AC component extracted by the filter section, by a predetermined gain, thereby outputting a correction signal, the control section controls the inverter based on a signal obtained by adding the correction signal to the voltage instruction, and the power conversion apparatus includes peak value deriving means for outputting a peak value of the AC component extracted by the filter section, so that the magnitude of the correction signal is adjusted based on the peak value of the AC component outputted from the peak value deriving means.