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This paper proposes a new breed of solid-state transformer (SST) distribution tail system mainly based on hybrid cascaded multilevel converter and resonant DC-DC converters between medium-voltage distribution and low-voltage customer side. The proposed SST topology mainly combines per-phase cascaded H-bridge converters based on the DC transformers (DCTs) with the square-wave two-level VSC based on...
This paper proposes a novel individual phase current control scheme for star-connected cascaded power electronics transformer (PET) under unbalanced grid voltage conditions, and PET mainly combines the cascaded H-bridge converter with resonant DC-DC converters (CLLC) between medium-voltage distribution and low-voltage customer DC side. Compared with traditional DQ decoupling current control, each...
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