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At present, there are many methods to improve the compensation performance of active power filter (APF). However, to improve the reliability of APF, dead-time between two IGBT switches in the same bridge must be set large enough to guarantee the IGBT operating safely, which will impact the output performance of APF. This paper proposes a modeling method on a specific order harmonic to investigate the dead-time’s influence to the compensation performance of APF. The theoretical analysis is well verified by the simulation results. At last, some methods are recommended to minimize the unexpected effect caused by dead-time. Keywords-active power filter (APF); power quality; harmonic; dead-time effect

Research on Mechanism of Dead-time Influencing APF’s Compensation Performance