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Geothermal Heat Pump System Technical Specifications
This FEMP document specifies technical requirements for geothermal heat pump (GHP) systems used in federal buildings. It covers system sizing, efficiency ratings, refrigerants, controls, ground loop design, installation practices, and commissioning procedures. The specifications h...
Program, M. U.S. Department of Energy
Jul 07, 2025
Considerations for Distributed Energy Resource Integration in Puerto Rico: Analytical Support for Interconnection and IEEE Std 1547-2018
This report documents collaborative efforts by several U.S. national laboratories to support Puerto Rico's integration of distributed energy resources (DER) into its electric grid. The multi-lab team provided technical analyses, grid modeling, and stakeholder engagement to develop...
Narang, D. et al NLR
Jan 31, 2021
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
Microgrid and Integrated Microgrid Systems Program
This program report from the U.S. Department of Energy's Office of Electricity summarizes initiatives aimed at advancing microgrids and integrated microgrid systems. It describes program goals, funded projects, research areas, and partnerships. The program seeks to develop technol...
U.S. Department of Energy
Dec 31, 2021
Roadmap for Photovoltaic Cyber Security
Cyber-secure, resilient energy is paramount to the prosperity of the United States. As the experience and sophistication of cyber adversaries grow, so too must the US power system’s defenses, situational awareness, and response and recovery strategies. Traditionally, power syste...
Johnson, J. Sandia National Laboratories
Nov 30, 2017
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
Quantitative Small-Signal Stability Analysis of Grid-Forming Inverters in Large-Scale Power Systems
In this paper, the challenges induced by the integration of inverter-based resources (IBRs) into existing power systems are discussed. Although the grid-forming (GFM) control has been used to enhance system performance in multiple sections of electric power systems (e.g., transmis...
Ding, L. et al Purdue University
Dec 31, 2022
Cybersecurity Guidance for Distributed Energy Resource Management Systems (DERMS)
As part of the Securing Solar for the Grid (S2G): Cybersecurity for Solar Systems workshop at RE + in Las Vegas, Nevada, NREL researchers discuss an ongoing effort to develop cybersecurity guidance for vendors and operators of distributed energy resource management systems (DERMS)...
Saleem, D. et al NLR
Sep 13, 2023
Utility and Grid Operator Resources for Future Power Systems Webinar Series: Introduction to Microgrids
NREL's collection highlights research, datasets, and decision support tools for transmission and distribution planning, interconnection studies, and operations. The page helps utilities and grid operators evaluate options for accommodating emerging large loads, including data cent...
Prabakar, K. NLR
Jul 15, 2025
A Cyber-Resilience Risk Management Architecture for Distributed Wind
Distributed wind is an electric energy resource segment with strong potential to be deployed in many applications, but special consideration of resilience and cybersecurity is needed to address the unique conditions associated with distributed wind. Distributed wind is a strong ca...
Culler, M. et al Idaho National Laboratory
Oct 17, 2021
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