Abstract
Compensation of harmonics in high frequency range by active power filter (APF) using SiC-MOSFET inverter is investigated. A new control method of APF controlled by deadbeat control and repetitive control is proposed. Aiming at frequency, the sampling time is further shortened and increasing the switching frequency is designed in the digital control system. The control of harmonics compensation is realized by the repetitive control, which is adapted for high frequency harmonics by using periodicity. And the current regulator for the output current of the APF is realized by the deadbeat control, which can regulate the output current accurately without delay. SiC-MOSFET inverter is applied to the APF to obtain high frequency switching. Performance of the harmonics compensation by the proposed method is investigated in experiment and excellent compensation is performed in the range to 30th order (1.8kHz) harmonics. A theoretical analysis, simulation results and experimental results using SiC-MOSFET inverter are presented.
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