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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
Design of a Non-PLL Grid-Forming Inverter for Smooth Microgrid Transition Operation
This paper develops a controller for a grid-forming (GFM) inverter that is capable of operating as either a GFM or grid-feeding source that can improve the operation of a microgrid during on-off grid transitions through use of a novel synchronization approach. Furthermore, this co...
Wang, J. et al NLR
Aug 01, 2020
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
Design of Resilient Electric Distribution Systems for Remote Communities: Surgical Load Management using Smart Meters
This paper describes a systematic process of designing resilient electric distribution systems and microgrids using smart meters for surgical load management (SLM) as part of Advanced Metering Infrastructure (AMI). The work focuses on selection approach, integration, and interoper...
Panwar, M. et al NLR
Dec 31, 2020
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
A Guide to Updating Interconnection Rules and Incorporating IEEE Std 1547-2018
This NREL resource provides a roadmap for revising interconnection rules and standards to incorporate the provisions of IEEE Std 1547-2018. It discusses key changes in the standard including ride-through, reactive power control, and communications and offers recommendations for up...
Ingram, M. et al NLR
Sep 30, 2021
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
User Objectives and Design Approaches for Microgrids: Options for Delivering Reliability and Resilience, Clean Energy, Energy Savings, and Other Priorities
This briefing paper, produced by NARUC and NASEO's Microgrids State Working Group, explores why different customers pursue microgrids and how design choices affect outcomes. Microgrids can operate in grid-connected or islanded mode, using local generation, storage and controls to ...
National Association of Regulatory Utility Commissioners, N.
Dec 31, 2020
Use of Traveling Wave Signatures in Medium-Voltage Distribution Systems for Fault Detection and Location
Protection systems are a critical feature for the proper operation of a power grid. Protection systems should be able to quickly detect, identify, locate, and isolate the faults within a time frame that prevents damage to grid components and reduces customer outages. As more inver...
Prabakar, K. et al NLR
Jul 31, 2021
Microgrids for Energy Resilience: A Guide to Conceptual Design and Lessons from Defense Projects
This playbook from the Rocky Mountain Institute offers a comprehensive framework for regulators, utilities, and developers to design and implement non-wires solutions (NWS). NWS are alternatives to conventional grid infrastructure upgrades that use distributed resources, demand re...
Booth, S. et al NLR
Dec 31, 2019
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