A New Dead Time Compensation method for Stand - alone Inverter under Unbalanced Loads
نویسندگان
چکیده
phase stand-alone inverter is caused by unbalanced load and a dead time distorts inverter output voltage more unsymmetrically. When the inverter supplies unbalanced load, three phase output voltages include unbalanced odd harmonics but dq-axis voltages at synchronous reference frame have even harmonics with different magnitude each other. In this paper, a new compensation method is proposed to improve the symmetry of inverter output voltage and simultaneously compensate the voltage distortion caused by dead time. The proposed dead time compensation method uses proportional integral (PI) and resonant (R) control. The effectiveness of the proposed method has been investigated and verified through experiments by a 10kW inverter under unbalanced load.
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