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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
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
Design of a Microgrid Transition Controller II: System Recovery Under Abnormal Conditions
This paper presents a microgrid transition controller for managing emergency operation when the microgrid experiences a system blackout caused by an internal or external fault. The developed transition controller consists of various application function blocks, including normal op...
Wang, J. et al NLR
Dec 31, 2017
Revision of IEEE Standard 1547: The Background for Change
This article is the first in a four-part series regarding the IEEE standard 1547 and its impact on the electric grid. The background and purpose of this standard is discussed here, and subsequent articles will focus on related issues of voltage regulation, disturbance performance,...
Walling, R. Walling Energy Systems Consulting, LLC
Oct 31, 2016
Revision of IEEE Standard 1547: New Disturbance Response Requirements
This resource summarizes the new disturbance-response requirements in the revised IEEE Std 1547, covering ride through capabilities, frequency and voltage excursion tolerances, and dynamic response expectations for distributed energy resources. It likely discusses how DER must res...
Walling, R. Walling Energy Systems Consulting, LLC
Jan 31, 2017
A Solar Hosting Capacity Analysis on a Synthetic Rural Alaska Microgrid Model
The report discusses procedures used to conduct a hosting capacity analysis (HCA) on a synthetic Alaskan microgrid model. This includes the test case used, assumptions in the analysis, and the several algorithms implemented. The maximum distribution transformer and line loading o...
Francisco, A. et al University of Alaska Fairbanks
Apr 24, 2025
uGrid: Reliable Minigrid Design and Planning Toolset for Rural Electrification
Introduces uGrid, an open-source minigrid design and planning toolset created with minigrid developers to support rural electrification. Integrates equipment sizing and resource allocation with uGridNet for distribution network layout and reliability cost–benefit analysis, inclu...
Cicilio, P. et al Oregon State University
Nov 10, 2019
Clean Energy Microgrids: Considerations for State Energy Offices and Public Utility Commissions to Increase Resilience, Reduce Emissions, and Improve Affordability
This FEMP guide outlines techniques to mitigate hail damage to solar PV installations. It covers risk assessment, module selection with hail-resistant ratings, array tilt considerations, mounting structures, protective covers, and insurance considerations. The resource aims to hel...
National Association of Regulatory Utility Commissioners and National Association of State Energy Officials
Apr 30, 2023
High-Penetration Photovoltaic Integration Handbook for Distribution Engineers
This handbook, produced by NREL, offers practical guidance for distribution engineers facing high penetration of photovoltaic (PV) systems on their networks. It addresses technical challenges such as voltage regulation, protection coordination, reverse power flow, and transformer ...
Seguin, R. et al NLR
Dec 31, 2015
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