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|1. (WO2017033429) POWER CONVERSION DEVICE|
|Applicants:||PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
|Title:||POWER CONVERSION DEVICE|
A control circuit 27 calculates active power and inactive power on the basis of the instantaneous current and instantaneous voltage calculated on the output side of an inverter circuit 22 and the phase of a system 30, and, from the active power and inactive power, estimates the ripple component of the voltage of a smoothing first capacitor C1 arranged between a DC power source 10 and the inverter circuit 22. The voltage detected in the first capacitor C1 is corrected by the estimated ripple component, and a drive signal of the inverter circuit 22 is generated on the basis of the deviation between the corrected voltage and the target voltage of the first capacitor C1, and on the basis of the current and voltage detected on the output side of the inverter circuit 22.