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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
Background Information on the Protection Requirements in IEEE Std 1547-2018
This resource offers explanatory background on the protection requirements outlined in IEEE Std 1547-2018, the standard governing interconnection of distributed energy resources (DER). It discusses the rationale behind protective device settings, fault detection, anti-islanding re...
Mahmud, R. and Ingram, M. NLR
Dec 31, 2021
An Overview of Distributed Energy Resource (DER) Interconnection: Current Practices and Emerging Solutions
This guidebook provides an overview of key issues for utilities and utility regulators to consider as deployments of distributed energy resources (DER) increase, including what has been tried in the field and emerging good practices. Topics covered include: Interconnection Applica...
Horowitz, K. et al NLR
Mar 31, 2019
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
Synchronization of Lienard-Type Oscillators in Heterogenous Electrical Networks
Motivated by potential applications for power-electronic converters in microgrids, we study the problem of global asymptotic synchronization of Lienard-type nonlinear oscillators in heterogenous LTI electrical networks with series R-L circuits modeling interconnections. By heterog...
Johnson, B. et al University of Minnesota
Dec 31, 2017
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
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
Test of a 250 kVA Battery-Inverter System Micro-Grid: Cooperative Research and Development Final Report, CRADA Number CRD-11-460
Portland General Electric (PGE) is installing a 5-megawatt (MW) lithium-ion-based battery-inverter system (BIS) in Salem, Oregon, as part of the Pacific Northwest Smart Grid Demonstration Project. NREL will assist PGE in testing a 250-kilovolt-ampere (kVA) portion of the BIS in or...
Kramer, W. et al NLR
Nov 30, 2013
A Power-Hardware-in-the-Loop (PHIL) Evaluation of Service Restoration With Networked Microgrids
This paper describes the power-hardware-in-the loop (PHIL) evaluation of the feasibility of service restoration solutions determined by the PowerModelsONM.jl tool. This tool incorporates microgrids and the networking of microgrids into its determination of an optimal service resto...
Jain, R. et al NLR
Dec 31, 2023
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