OUTPUT VOLTAGE CONTROL APPARATUS AND SYSTEM FOR THE INVERTER OF AN UNINTERRUPTIBLE POWER SUPPLY

摘要

PURPOSE: An output voltage control device is provided to minimize a harmonic circulating current regardless of a load condition of an uninterruptible power supply device by controlling the harmonic component of an output voltage of an inverter. CONSTITUTION: An elementary wave deviation compensation part(110) generates a signal for compensating an elementary wave error from the output voltage of an inverter. A harmonic voltage compensation part(120) generates a signal for compensating the harmonic voltage component from the output voltage of the inverter. A harmonic current compensation part(130) generates a signal for compensating the harmonic current component from the output voltage of the inverter. A controller(140) generates a command signal for improving the THD(Total Harmonic Distortion) of the output voltage of inverter.