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Voices of Experience: Microgrids for Resiliency
This report in the 'Voices of Experience' series compiles lessons learned from utilities, communities, and developers about using microgrids to enhance resilience against grid disruptions. It covers topics such as microgrid design, technology selection, financing, regulatory consi...
NREL, S. NLR
Oct 31, 2020
Revision of IEEE Std 1547: Additional Topics
This TechSurveillance article is the last in a series of four articles that describe the changes proposed for IEEE 1547, provide the rationale for these changes, and describe how they will affect the planning, design, protection, and operation of rural electric cooperative distri...
Walling, R. Walling Energy Systems Consulting, LLC
Mar 31, 2017
Hierarchical Data-Driven Protection for Microgrid with 100% Renewable Penetration: Preprint
The accurate detection and isolation of faults is critical for the reliable operation of microgrids (MGs). Traditional protection approaches are even more challenged for 100% renewable MGs because inverter-based resources (IBRs) are the only sources for fault current which are usu...
Zamzam, A. and Wang, J. NLR
Oct 31, 2023
Operation of Grid Forming Converters as Self Excited Induction Generators Under Non-Ideal Loading Conditions
Self-excited induction generators offer a robust solution for power production for standalone as well as grid-connected systems. In general, self-excited induction generators require excitation capacitors which make use of the machine magnetization characteristics for voltage buil...
Roy Chowdhury, V. and Mather, B. NLR
Dec 31, 2023
Black-Starting Microgrids Using Inverter-Based Distributed Energy Resources
Recent trends in power systems show increasing deployment of inverter-based distributed energy resources (DERs) at the distribution level. Efforts have also been made to use inverter-based DERs for system restoration of critical sections of distribution feeders. In the past few ye...
Sawant, J. et al NLR
Dec 31, 2024
The Value of Battery Storage in Military Microgrids: An Assessment for ESTCP
Fixed military installations cannot function without a reliable supply of electricity. The U.S. Department of Defense’s (DoD’s) mission is under increasing threat as the power backbone of installations faces growing risk from grid power outages, especially as outages of up to ...
Marqusee, J. et al NLR
Dec 31, 2019
Wind Resource Maps and Data
NREL's wind resource maps and data page hosts downloadable maps, shapefiles, and tabular data depicting wind speeds, power density, and turbine class estimates across the United States. The resources include high resolution wind maps at multiple hub heights, offshore wind resource...
NLR
Apr 12, 2025
Cybersecurity Certification Standard for Distributed Energy and Inverter-Based Resources
NREL and UL co-presented on their joint effort to develop a cybersecurity certification standard for distributed energy resources (DERs) at a meeting of the Cybersecurity Advisory Team for State Solar (CATSS). The advisory team is hosted by NASEO and NARUC. The presentation outlin...
Saleem, D. and Slowinske, M. NLR
Jan 23, 2022
A Primer on the Unintentional Islanding Protection Requirement in IEEE Std 1547-2018
This primer provides an accessible explanation of the unintentional islanding protection provisions in IEEE Std 1547-2018. It describes why preventing unintentional islanding is critical, outlines testing and detection methods, and clarifies performance requirements for distribute...
Narang, D. et al NLR
Mar 31, 2022
New Approaches to Distributed PV Interconnection: Implementation Considerations for Addressing Emerging Issues
This report discusses innovative approaches to distributed photovoltaic (PV) interconnection aimed at addressing emerging issues such as high penetrations, rapid interconnection requests, and evolving standards. It examines options like hosting capacity analysis, flexible intercon...
McAllister, R. et al Western Interstate Energy Board
Jan 31, 2019
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