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Developing Use Cases for Evaluation of ADMS Applications to Accelerate Technology Adoption: Preprint
Grid modernization for the distribution systems comprise of the ability to effectively monitor and manage unplanned events while ensuring reliable operations. Integration of Distributed Energy Resources (DERs) and proliferation of autonomous smart controllers like microgrids and s...
Veda, S. et al NLR
Apr 30, 2017
Study of Seamless Microgrid Transition Operation Using Grid-Forming Inverters
This paper investigates operational techniques to achieve seamless (smooth) microgrid (MG) transitions by dispatching a grid-forming (GFM) inverter. In traditional approaches, the GFM inverter must switch between grid-following (GFL) and GFM control modes during MG transition oper...
Wang , J. et al NLR
Dec 31, 2022
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
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
Integrated Synchronization Control of Grid-Forming Inverters for Smooth Microgrid Transition
This paper develops an integrated synchronization control technique for a grid-forming inverter operating within a microgrid that can improve the microgrid's transients during microgrid transition operation. This integrated synchronization control includes the disconnection synchr...
Wang, J. et al NLR
Jul 31, 2019
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
Design of a Microgrid Transition Controller II: System Recovery Under Abnormal Conditions
This paper presents a microgrid transition controller for managing emergency operation when the microgrid experiences a system blackout caused by an internal or external fault. The developed transition controller consists of various application function blocks, including normal op...
Wang, J. et al NLR
Dec 31, 2017
Hardware-in-the-Loop Test Bed and Test Methodology for Microgrid Controller Evaluation
Increasing penetration levels of distributed energy resources are making the deployment of microgrids more feasible. Controllers that operate such microgrids are key to realizing the objectives of the microgrid owner or operator and there is a need to evaluate microgrid controller...
Prabakar, K. et al NLR
Aug 16, 2018
Black-Starting Microgrids Using Inverter-Based Distributed Energy Resources
Recent trends in power systems show increasing deployment of inverter-based distributed energy resources (DERs) at the distribution level. Efforts have also been made to use inverter-based DERs for system restoration of critical sections of distribution feeders. In the past few ye...
Sawant, J. et al NLR
Dec 31, 2024
Igiugig Site Visit Report
NREL (NREL) team conducted a site visit during January 23-25, 2019 with the Igiugig Village Council (IVC) and other stakeholders to assist the community of Igiugig in refining their long-term energy strategy. The agenda included a tour of the village, data collection, presentation...
Kilcher, L. et al NLR
Oct 31, 2021
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