Grid-Connected Self-Synchronous Cascaded H-Bridge Inverters with Autonomous Power Sharing: Preprint Article Swipe

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Soham Dutta , Minghui Lu , Branko Majmunović , Rahul Mallik , Gab‐Su Seo , Dragan Maksimović , Brian F. G. Johnson ·

YOU? · · 2021 · Open Access · · OA: W4286900791

Cascaded inverters are widely applied in applications where elevated ac voltages are required while using semiconductor devices with lower voltage ratings. Here, we focus on structures that require localized power transfer between low-voltage sources/loads dispersed across inverter dc links and the inverter ac-sides are series-connected across a three-phase medium-voltage ac grid. To date, decentralized controllers that allow for bi-directional power transfer in such systems are limited. To fill this gap, we propose a virtual oscillator controller which modulates the power processed by each inverter in a purely decentralized manner.