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Improved Control Strategy of Grid-Forming Inverters for Fault Ride-Through in a Microgrid System
This paper develops an improved control strategy of grid-forming (GFM) inverters with fault ride-through capabilities to guarantee the stable operation of microgrids under fault conditions, especially islanded microgrids and asymmetrical faults. The proposed control strategy inclu...
Wang, J. NLR
Dec 31, 2021
Impacts of Dispatch Strategies and Forecast Errors on the Economics of Behind-the-Meter PV-Battery Systems
To assess the economic value of batteries in hybrid PV-battery systems, one must create a dispatch profile for the battery. Many analyses of battery value assume perfect forecasts of PV generation and load, determining an upper limit on the value of the battery. Prior work that ac...
Mirletz, B. and Laws, N. NLR
Dec 31, 2022
High-Frequency Signature-Based Fault Detection for Future MV Distribution Grids: Preprint
Increased deployment of Distributed Energy Resources (DERs) and microgrids are significantly changing the operation of distribution grid. Increasing penetration of power electronics based DERs also raise several operational problems such as protection coordination issues, voltage ...
Velaga, Y. et al NLR
Jun 30, 2020
Distributed Wind Controls: A Research Roadmap for Microgrids, Infrastructure Resilience, and Advanced Controls Launchpad (MIRACL)
The Microgrids, Infrastructure Resilience, and Advanced Controls Launchpad (MIRACL) project’s controls research area aims to expand the benefits from distributed wind (DW) generation assets beyond solely providing low cost power directly to consumers. To make distributed wind tu...
Reilly, J. et al NLR
Dec 31, 2020
Security-Constrained Design of Isolated Multi-Energy Microgrids
Energy supply in rural and off-grid communities has traditionally relied on diesel-based microgrids, due to limited access. But global environmental concerns are pushing for the transformation of these systems into renewable-based microgrids. This transition to more complex system...
Mashayekh, S. et al Lawrence Berkeley National Laboratory
Mar 31, 2018
Networked Microgrid Optimal Design and Operations Tool: Regulatory and Business Environment Study
Microgrids increase the reliability of the electric supply at the distribution level by combining multiple power generation assets, storage systems, and loads. Networking two or more microgrids has the potential to increase reliability more efficiently and at a lower cost by takin...
Flores-Espino, F. et al NLR
Apr 30, 2020
A Broad Overview of Energy Efficiency and Renewable Energy Opportunities for Department of Defense Installations
The Strategic Environmental Research and Developmental Program (SERDP)/Environmental Security Technology Certification Program (ESTCP) is the Department of Defense's (DOD) environmental science and technology program focusing on issues related to environment and energy for the mil...
Anderson, K. NLR
Jul 31, 2011
Grid Application and Controls Development for Medium-Voltage SiC-Based Grid Interconnects: Preprint
In this paper, the grid-interconnection requirements of directly connected medium voltage (MV) SiC-based converters are studied and the necessary control implementations are detailed. These power electronic converters use the interconnection standard IEEE 1547-2018, but can also h...
Singh, A. et al NLR
Sep 30, 2020
Design of a State Machine for Smooth Microgrid Transition Operation
A state machine is proposed in the energy management system (EMS) of a microgrid as the solution for smooth microgrid's transition operation. This state machine includes six 'states' that cover all the operating modes during the microgrid's transition operation: two basic modes (g...
Wang, J. et al NLR
Jul 02, 2018
Distribution Optimal Resilience Design Tool “LPNORM”
The Distribution Optimal Resilience Design Tool, known as LPNORM, is a software module distributed through NRECA’s Open Modeling Framework that helps utilities plan resilience investments on distribution circuits. Users can import detailed circuit and pole models, define extreme...
Pinney, D. National Rural Electric Cooperative Association
Oct 31, 2024
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