An Active Power Decoupling Strategy to Reduce the Capacitor Size of a Cascaded H-Bridge Converter in a Solid State Transformer

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Abstract

This paper presents a control strategy for active power decoupling in a Solid State Transformer (SST) using a cascaded H-bridge (CHB) converter, dual active bridge (DAB) converters, and a high-frequency link (HFL). The strategy balances capacitor voltage and decouples power flow, significantly reducing second harmonic voltage ripple in DC link capacitors and potentially reducing their size.

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- Embargo expired in 18-03-2025
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