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Unleash Values From Grid-Edge Flexibility
Summarizes control strategies, coordination frameworks, and value streams enabled by grid edge assets. Highlights practical experience, gaps in visibility and interoperability, and opportunities to scale flexibility services across distribution systems.
Ding, F. et al NLR
Jan 01, 2022
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
DERMS Online: A New Voltage Sensitivity-Enabled Feedback Optimization Framework
Demonstrates a perturb and observe voltage sensitivity method to reformulate nonlinear control into tractable LP problems for real-time operation. Evaluates performance and discusses deployment considerations for distribution systems with high DER penetration.
Yao, Y. et al NLR
Jan 01, 2022
An Overview of Issues Related to IEEE Std 1547-2018 Requirements Regarding Voltage and Reactive Power Control
This overview discusses the voltage and reactive power control provisions of IEEE Std 1547-2018 and highlights implementation challenges for distributed energy resource interconnections. It covers topics such as voltvar control curves, ride through capabilities, coordination with ...
Narang, D. et al NLR
Aug 31, 2021
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
Fuel Cell Inverter Transition Between Modes of Operation (Grid-Forming and Grid-Following)
This NREL dataset provides data and documentation from experiments investigating how a fuel cell inverter transitions between grid-forming and grid-following modes of operation. The dataset includes time-series measurements of voltages, currents, and control signals during mode tr...
Nemsow, N. et al NLR
Dec 26, 2024
Experimental Validation of a Diesel Genset Frequency Dynamics Model for Use in Remote Area Power Systems
Addresses the need for accurate diesel generator dynamic models in converter-dominated remote microgrids by experimentally identifying and validating a frequency dynamics model for a 400 kVA diesel genset. Notes that original vendor/system models often do not match observed field ...
Rauniyar, M. et al Electric Power Research Institute
Jun 12, 2024
Power-Hardware-in-the-Loop Interfaces for Inverter-Based Microgrid Experiments Including Transitions
Microgrids continue to proliferate, particularly those that rely on inverter-based resources as the microgrid's voltage and frequency leader. Hardware-in-the-loop simulations can de-risk microgrid deployments, and therefore we need power hardware-in-the-loop (PHIL) interfaces for ...
Pratt, A. et al NLR
Dec 31, 2022
Using Energy Storage-Based Grid Forming Inverters for Operational Reserve in Hybrid Diesel Microgrids
Studies transient dynamics in a hybrid diesel microgrid during loss of wind generation and evaluates a transition from diesel spinning reserve to a battery energy storage system operating reserve using grid-forming inverters. Combines electromagnetic simulations with a power hardw...
Hernandez-Alvidrez, J. et al Sandia National Laboratories
Mar 26, 2022
Diesel Generator Controller Evaluation via Controller-Hardware-in-the-Loop for Various Microgrid Operation Modes
This paper presents the Controller-Hardware-in-the-Loop (CHIL) evaluation of a diesel generator controller for various microgrid operation modes. The model of the diesel generator (governor, exciter, and primary control) is simulated in real time, and the secondary control is impl...
Wang, J. et al NLR
Jan 31, 2019
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