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Song, Geum Seop; Cui, Shenghui; Jung, Jae-Jung
IEEE transactions on power electronics, 2024-Sept., 2024-9-00, Letnik: 39, Številka: 9Journal Article
In neutral point clamped (NPC) converters, the voltage ripples in each dc-link capacitor are mainly influenced by the third harmonic component in the neutral point of the three-level NPC converter. These low-order harmonic voltage ripples distort the output of the converter and compromise system stability. Moreover, as the converter's output increases, the capacitor's ripple component escalates correspondingly, necessitating capacitors with a higher capacitance to maintain the reliability of the NPC converter. In this article, a novel technique is introduced that is designed to mitigate voltage ripples in the dc-link capacitor of three-level NPC converters. By employing a zigzag transformer, the method effectively compensates for the third harmonic component of the voltage in the dc link, resulting in a significant reduction of ripple. The validity and effectiveness of the proposed method are corroborated through comprehensive simulations and experiments.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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