Harmonic Impedance Control Strategy with Adaptive Harmonic Compensation
Aiming at the power quality problems brought about by the high proportion of power electronic load access in industrial parks,a harmonic impedance control strategy based on APF with adaptive harmonic compensation current limiting function is proposed.The harmonic impedance control strategy can control the command current of the sys-tem without difference and control each harmonic component independently,and the adaptive harmonic compensation current limiting can target harmonic compensation,and the combination of the two can control each selected harmonic component individually,so that the effect of harmonic compensation after current limiting is significantly improved.The control strategy in the system capacity does not exceed the limit in Matlab/Simulink to build a simulation mod-el,the results show that the control strategy response speed is fast,after the treatment of the total harmonic distortion rate of 2.91％,a reduction of 27.08％,three-phase imbalance degree of 8.52％,a reduction of 16.15％,the compensa-tion effect is obvious.
harmonicadaptive harmonic compensation current limitingthree-phase unbalanceharmonic impedance control
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