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With the rapid development of power electronics dominated power systems, the impact of supraharmonics generated by power electronic devices on power quality is becoming more and more significant, leading to supraharmonics becoming a new type of power quality problem that cannot be ignored. Current research of supraharmonics focuses on the generation mechanism, propagation mechanism, interaction effects, measurement and standardization, but no effective suppression scheme for supraharmonics has been proposed so far. This paper proposes a hybrid power filter scheme suitable for dealing with supraharmonics in low-voltage power distribution networks, which is composed of a passive part and an active part connected in series. Among them, the active part is a linear amplifier circuit with high bandwidth for supraharmonics compensation, and the passive part is used to share the grid fundamental frequency voltage drop. In this paper, it is verified through simulation and experiment that the filter scheme has significant suppression effect on supraharmonics and good dynamic performance, and the operating loss and output capacity of the active part are significantly reduced.
Li et al. (Mon,) studied this question.