Inverter Controls for Smooth Transition Operation and Voltage Balancing of Networked Microgrids

Sawant, Jay Ramesh; Jain, Rishabh; Pratt, Annabelle

doi:10.1109/ECCE53617.2023.10362066

Inverter Controls for Smooth Transition Operation and Voltage Balancing of Networked Microgrids

Conference · Thu Dec 28 23:00:00 EST 2023

DOI:https://doi.org/10.1109/ECCE53617.2023.10362066· OSTI ID:2305404

Sawant, Jay Ramesh; Jain, Rishabh; Pratt, Annabelle

With increasing penetrations of distributed energy resources (DERs), researchers have extensively studied the formation and networking of microgrids to improve reliability during distribution system outages. However, these operations might require DERs in the microgrids to switch between grid-following (GFL) and grid-forming (GFM) modes of operation. A smooth transition between the operation modes should be ensured to have a stable system operation and to avoid nuisance tripping. Additionally, as we network microgrids, inverter control schemes with voltage-balancing controls are needed for unbalanced distribution networks. This paper presents the design of a GFM and GFL capable inverter control scheme for reliable operation in networked microgrids with mechanisms for 1) smooth transition between the GFL and GFM modes, and 2) negative sequence voltage control for voltage balancing. Using electromagnetic transient (EMT) simulations, the control scheme is first tested on a simple two-source power system using a digital real-time simulator. Next, a real-world distribution feeder with unbalanced loading and multiple DERs is used to demonstrate stable operation during the networking of microgrids with voltage balance support.

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Electricity (OE)

DOE Contract Number:: AC36-08GO28308

OSTI ID:: 2305404

Report Number(s):: NREL/CP-5D00-88812; MainId:89591; UUID:a9e53db8-d9c8-4683-b000-868407965b63; MainAdminId:71800

Country of Publication:: United States

Language:: English

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POWER TRANSMISSION AND DISTRIBUTION
distributed energy resources
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microgrids
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