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Impact of Load Tap Changer Control Operation Under Microgrid Conditions
Every microgrid is unique in its diversity of assets, operation, and network structure. This uniqueness presents challenges for each microgrid implementation that need to be understood and addressed to prevent power quality concerns, stability issues, and blackouts. In this resear...
Prabakar, K. et al NLR
Dec 31, 2021
Black Start of Unbalanced Microgrids Harmonizing Single and Three-Phase Grid-Forming Inverters: Preprint
As power systems are transforming with increasing penetrations of inverter-based resources (IBRs), system restoration using IBRs has drawn attention. Using distributed grid-forming (GFM) assets located near critical loads, either three-phase or single-phase, to establish microgrid...
Seo, G. et al NLR
Jul 31, 2023
User Objectives and Design Approaches for Microgrids: Options for Delivering Reliability and Resilience, Clean Energy, Energy Savings, and Other Priorities
This briefing paper, produced by NARUC and NASEO's Microgrids State Working Group, explores why different customers pursue microgrids and how design choices affect outcomes. Microgrids can operate in grid-connected or islanded mode, using local generation, storage and controls to ...
National Association of Regulatory Utility Commissioners, N.
Dec 31, 2020
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
NREL and SDGandE Collaboration to Support SDGandE Grid and Storage Efforts: Cooperative Research and Development Final Report, CRADA Number: CRD-14-562
This project will enable effective utilization of high penetration of photovoltaics (PV) in islanded microgrids, increasing overall system efficiency, decreased fuel costs and resiliency of the overall system to help meet the SunShot goals of enhancing system integration methods t...
Baggu, M. NLR
Dec 31, 2016
Cybersecurity Certification Recommendations for Interconnected Grid Edge Devices and Inverter Based Resources
Escalating deployment of PV and grid-edge devices on the distribution grid has increased the sustainability and efficiency of the electric grid. However, the increasing number of distributed energy resources (DERs) deployed creates a heightened cyber-physical interdependency on th...
Hupp, W. et al NLR
Oct 31, 2021
Dispatching Grid-Forming Inverters in Grid-Connected and Islanded Mode
This paper explores the dispatchability of grid-forming (GFM) inverters in grid-connected and islanded mode. GFM inverters usually use droop control to automatically share power with other GFM sources (inverters and synchronous generators) and follow the change in the load demand;...
Wang, J. et al NLR
Dec 31, 2023
Power Sector Transformation Pathways: Exploring Objectives, Factors. and Technology Innovations to Inform Power Sector Pathway Decisions
The power and heating sectors are responsible for around 30% of global CO2 emissions and this share is likely to grow as countries move towards electrification of the transportation and building sectors. Therefore, enabling forward-thinking, long term strategies in the power secto...
Cox, S. et al NLR
Jan 31, 2020
Southwest Wind Power RandD Test Site Development at the National Wind Technology Center: Cooperative Research and Development Final Report, CRADA Number CRD-12-00472
Southwest Windpower, Inc. (SWWP) has been designing and distributing small wind turbines for more than 22 years and is the recognized global leader in the design, manufacturing and distribution of small wind systems (400-3000 watts). The company has been a pioneer in the developme...
Jager, D. and Huskey, A. NLR
Jul 31, 2020
Learning-Based Building Flexibility Estimation and Control to Improve Microgrid Economics and Resilience: Preprint
This paper proposes a learning-based building flexibility estimation and control framework to improve system economics and resilience. A data-driven building load flexibility model consisting of weather forecasting and estimating load consumption is proposed to quantify building h...
Ding, F. et al NLR
Jun 30, 2024
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