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

Soham Dutta, Minghui Lu, Branko Majmunovic, Rahul Mallik, Gab-Su Seo, Dragan Maksimovic, Brian Johnson

Research output: Contribution to conferencePaper

Abstract

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.
Original languageAmerican English
Number of pages11
StatePublished - 2021
EventIEEE Energy Conversion Congress and Exposition (ECCE 2021) -
Duration: 10 Oct 202114 Oct 2021

Conference

ConferenceIEEE Energy Conversion Congress and Exposition (ECCE 2021)
Period10/10/2114/10/21

NREL Publication Number

  • NREL/CP-5D00-80468

Keywords

  • autonomous power sharing
  • Cascaded converters
  • decentralized control
  • PWM interleaving
  • self synchronization

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