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Circulating Current Reduction of Back-to-Back MMC with Advanced Grid-Support Functionalities for Medium-Voltage Applications
A Lyapunov energy function based circulating current reduction scheme for a back to back modular multilevel converter based system for a microgrid application has been proposed in this digest. In order to ensure no circulating or zero sequence currents within the modules, the dyn...
Roy Chowdhury, V. et al NLR
Dec 31, 2022
Microgrid Controller Survey Report: 2024 Update
In the past decade, the number of microgrids deployed by electric utilities, end-use customers, and third parties has been increasing significantly both in the US and worldwide. The increase is driven by various reasons, such as carbon emission reduction, energy efficiency improve...
Liu, G. and Starke, M. Oak Ridge National Laboratory
Mar 31, 2024
Validation of Microgrid Algorithms using At-Scale Simulation and Emulation Real-Time (ASSERT) Framework
This paper presents a novel framework for validating microgrid algorithms using a At-Scale Simulation and Emulation Real-Time (ASSERT) setup. The proposed universal microgrid validation framework was developed at Advanced Research on Integrated Energy Systems (ARIES) platform at N...
Chanda, S. et al NLR
Dec 31, 2022
Black Start of Unbalanced Microgrids Harmonizing Single and Three-Phase Grid-Forming Inverters: Preprint
As power systems are transforming with increasing penetrations of inverter-based resources (IBRs), system restoration using IBRs has drawn attention. Using distributed grid-forming (GFM) assets located near critical loads, either three-phase or single-phase, to establish microgrid...
Seo, G. et al NLR
Jul 31, 2023
Cybersecurity Certification Recommendations for Interconnected Grid Edge Devices and Inverter Based Resources
Escalating deployment of PV and grid-edge devices on the distribution grid has increased the sustainability and efficiency of the electric grid. However, the increasing number of distributed energy resources (DERs) deployed creates a heightened cyber-physical interdependency on th...
Hupp, W. et al NLR
Oct 31, 2021
Analysis of Microgrid Performance, Reliability, and Resilience (AMPeRRe) Computational Model: Novel Analytical Model to Forecast the Outcomes of Installation Power Grids
Federal facilities, industrial areas, academic campuses, and communities are working to incorporate greater renewable energy sources and energy storage in their power infrastructure. While renewable sources of energy can—and do—support several facilities, uncertainty still exi...
Bozada, T. et al
Nov 30, 2024
Impact of IEEE 1547 Standard on Smart Inverters and the Applications in Power Systems
This white paper presents smart inverter features along with the implementation challenges and potential solutions. The paper describes smart inverter functionality and discusses their modeling, capabilities, testing, and certification. Originally published by a "fast track" worki...
Bravo, R. et al California Institute of Technology
Jul 31, 2020
Prevention of Unintentional Islands in Power Systems with Distributed Resources
This resource examines the phenomenon of unintentional islanding when a portion of the grid continues to be energized by distributed energy resources during a larger outage. It describes potential risks to safety and equipment, reviews existing standards and detection methods, and...
Kroposki, B. NLR
Aug 23, 2016
A Novel Power-Hardware-in-the-Loop Interface Method for Grid-Forming Inverter Systems
Power-hardware-in-the-loop (PHIL) simulations of grid-forming (GFM) inverter systems facilitate the testing of drastic scenarios, such as on-grid to off-grid transitions and islanded microgrid operations without a stiff grid. To the authors' best knowledge, most studies in the lit...
Chakraborty, S. et al University of Minnesota
Dec 31, 2021
Evaluation of MVDC Electrical Interties Connecting Remote Communities: an Alaska Case Study
This Alaska Center for Energy and Power report presents a techno-economic case study of interconnecting two remote, islanded power systems via a 25-mile electrical intertie. Using HOMER Pro models (including scenarios with energy storage), the analysis compares AC and DC intertie ...
Chamberlin, M. et al University of Alaska Fairbanks
Aug 21, 2023
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