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Unleashing the Frequency: Multi-Megawatt Demonstration of 100% Renewable Power Systems with Decentralized Communication-Less Control Scheme
Power systems, which range in size from small microgrids to island systems to large regional grids, are typically managed by a central controller that requires complex communication methods and can be unreliable and pose cyber security risks in certain applications, especially whe...
Koralewicz, P. et al NLR
Aug 31, 2022
Dynamic Shaping of Grid Response of Multi-Machine Multi-Inverter Systems Through Grid-Forming IBRs: Preprint
We consider the problem of controlling the frequency response of weakly-coupled multi-machine multi-inverter low-inertia power systems via grid-forming inverter-based resources (IBRs). In contrast to existing methods, our approach relies on dividing the larger system into multiple...
Poolla, B. et al NLR
Jun 30, 2024
Exceedance Probabilities and Recurrence Intervals for Extended Power Outages in the United States
Power outages cause significant economic and societal impacts. An increasing likelihood of extreme weather coupled with aging grid infrastructure is leading to a higher prevalence of extended power outages, which can leave customers without power for multiple days or even weeks. P...
Ericson, S. et al NLR
Sep 30, 2022
Design of Zone-Based Hierarchical Protection System for 100% Renewable Microgrids: Preprint
Design of a reliable and secure protection system for a 100% renewable microgrid with only inverter-based resources (IBRs), is quite challenging. Most of the existing protection schemes in the state-of-the-art are suitable for microgrids with mixed-type of distributed energy resou...
Chakraborty, S. and Wang, J. NLR
May 31, 2024
Modeling of Thermal Storage Systems in MILP Distributed Energy Resource Models
Thermal energy storage (TES) and distributed generation technologies, such as combined heat and power (CHP) or photovoltaics (PV), can be used to reduce energy costs and decrease CO2 emissions from buildings by shifting energy consumption to times with less emissions and/or lower ...
Steen, D. et al Lawrence Berkeley National Laboratory
Dec 31, 2014
U.S. Enhanced Geothermal Systems
Enhanced geothermal systems (EGS) can unlock geothermal resources in areas without naturally permeable reservoirs by creating engineered fractures to extract heat. NREL's EGS dataset rates potential sites across the United States by integrating geologic temperatures, depths, and c...
NLR
Feb 21, 2018
Renewable Energy Development in Indian Country: A Handbook for Tribes
This handbook, produced by the U.S. DOE Office of Indian Energy in collaboration with NREL, offers a comprehensive guide for tribes pursuing renewable energy development. It covers project planning, resource assessment, financing, partnerships, permitting, and tribal governance co...
MacCourt, D. U.S. Department of Energy
May 31, 2010
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
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
Applying IEEE Std 1547-2018: What Public Utilities Commissions Need To Decide and Do
This resource from NREL outlines the key decisions and actions that public utility commissions must undertake to implement IEEE Std 1547 2018, the revised interconnection standard for distributed energy resources. It explains policy choices such as adopting default ride through ...
Boemer, D. Electric Power Research Institute
Aug 20, 2018
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