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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
Microgrid System Project Development Checklist
This Federal Energy Management Program (FEMP) checklist outlines key steps for developing microgrid projects at federal facilities and other sites. It covers project initiation, feasibility studies, stakeholder engagement, financing, procurement, design, construction, commissionin...
Program, M. U.S. Department of Energy
Apr 06, 2025
Hail Damage Mitigation for Solar Photovoltaic Systems
Developed by the U.S. Army and U.S. Army Corps of Engineers, the AMPeRRe computational model forecasts performance, reliability, and resilience outcomes for installation power grids and microgrids. The model incorporates factors such as generation mix, load characteristics, outage...
Program, M. U.S. Department of Energy
Dec 31, 2025
Technical Specifications for On-site Solar Photovoltaic Systems
This FEMP resource offers detailed technical specifications for the procurement and installation of on-site solar photovoltaic systems. It covers performance requirements, design standards, component quality, safety criteria, and integration with existing electrical infrastructure...
Program, M. U.S. Department of Energy
Dec 31, 2025
Resilience Hubs: Creating a Resilience Hub and Spoke Network
Outlines siting and design considerations for Resilience Hubs, including roof condition and PV suitability, storage needs, accessibility, flood risk, and space for pets/children. Lists essential services (e.g., power, charging, refrigeration, potable water) and basic operational r...
Network, D. Urban Sustainability Directors Network
Dec 31, 2023
NREL's PVWatts Calculator
PVWatts is an easy to use calculator from NREL that estimates the annual energy output and levelized cost of electricity for a grid connected photovoltaic system based on system size, location, array tilt, and basic performance assumptions. It uses National Solar Radiation Databas...
NLR
Dec 31, 2024
REopt
REopt is a techno-economic optimization platform developed by NREL that recommends optimal sizes and dispatch strategies for distributed energy resources including solar photovoltaics, wind turbines, batteries, and thermal technologies based on site specific load profiles, utility...
NLR
Dec 31, 2025
Solar Photovoltaic Hardening for Resilience – Wildfire
This content explores the regions in the United States facing the highest wildfire risks and provides an overview of the diverse strategies available to photovoltaic (PV) system professionals, including designers, installers, owners, and operators, to effectively manage this risk....
Program, M. U.S. Department of Energy
Mar 30, 2026
Solar Photovoltaic Hardening for Resilience – Winter Weather
Produced by FEMP, this guide offers recommendations for hardening solar photovoltaic systems against winter weather hazards such as snow loads, ice buildup, and low temperatures. It covers design considerations, equipment selection, structural reinforcement, and maintenance practi...
Program, M. U.S. Department of Energy
Dec 31, 2025
Marine and Hydrokinetic Resource Maps and Data
This resource page consolidates maps and datasets for marine and hydrokinetic energy resources. Users can access regional and national assessments of wave energy, tidal stream energy, ocean currents, and in-stream river power. The datasets include spatially gridded resource intens...
NLR
Dec 16, 2024
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