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Interoperable, Inverter Based Distributed Energy Resources Enable 100% Renewable and Resilient Utility Microgrids
As microgrids transition away from use of conventional generating resources and increasingly rely on renewable resources towards decarbonization goals, it is crucial to evaluate the capability inverter-based resources to provide microgrid stability and resilience. Particularly, mi...
Abcede, L. et al San Diego Electric and Gas
Dec 31, 2024
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
Cyber Security Primer for DER Vendors, Aggregators, and Grid Operators
This report provides an introduction to cyber security for distributed energy resources (DER)—such as photovoltaic (PV) inverters and energy storage systems (ESS). This material is motivated by the need to assist DER vendors, aggregators, grid operators, and broader PV industry ...
Carter, C. et al Sandia National Laboratories
Jul 31, 2017
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
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
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
Background Information on the Power Quality Requirements in IEEE Std 1547-2018
This document provides context for the power quality requirements contained in IEEE Std 1547-2018. It explains why limits on voltage regulation, flicker, harmonics, and unintentional islanding were specified, and how distributed energy resources should comply. The guide discusses ...
Ingram, M. et al NLR
Sep 30, 2021
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