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

Conference · Mon Oct 18 04:00:00 EDT 2021

OSTI ID:1827308

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

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.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
• DOE Contract Number: AC36-08GO28308; AC36-08GO28308
• OSTI ID: 1827308
• Report Number(s): NREL/CP-5D00-80468; MainId:42671; UUID:45a594fa-7f06-4be1-9016-3294111b5d9e; MainAdminID:48424
• Country of Publication: United States
• Language: English

Related Subjects

Cascaded converters
POWER TRANSMISSION AND DISTRIBUTION
SOLAR ENERGY
PWM interleaving
autonomous power sharing
decentralized control
self synchronization