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Operation of Grid Forming Converters as Self Excited Induction Generators Under Non-Ideal Loading Conditions
Self-excited induction generators offer a robust solution for power production for standalone as well as grid-connected systems. In general, self-excited induction generators require excitation capacitors which make use of the machine magnetization characteristics for voltage buil...
Roy Chowdhury, V. and Mather, B. NLR
Dec 31, 2023
Cyber Security Primer for DER Vendors, Aggregators, and Grid Operators
This report provides an introduction to cyber security for distributed energy resources (DER)—such as photovoltaic (PV) inverters and energy storage systems (ESS). This material is motivated by the need to assist DER vendors, aggregators, grid operators, and broader PV industry ...
Carter, C. et al Sandia National Laboratories
Jul 31, 2017
Decentralized Microgrid Protection Through Relative Fault Direction Classification: Preprint
Protection in inverter-based resources (IBRs) dominated microgrids generally face significant challenges due to the low fault current and inconsistent fault behaviors from IBRs. Recently, machine learning-based approaches have attracted considerable attention to address these chal...
Chen, Y. et al NLR
Aug 31, 2024
NREL Topic 1 Final Report: Cohesive Application of Standards-Based Connected Devices to Enable Clean Energy Technologies
This document is the final report of a two-year development, test, and demonstration project entitled “Cohesive Application of Standards-Based Connected Devices to Enable Clean Energy Technologies”. The project was part of NREL’s (NREL) Integrated Network Test-bed for Energ...
Hudgins, A. et al NLR
Jan 31, 2018
Distributed Energy Resources Interconnection Workshop 2022
Foundational presentations on DER aggregation, wholesale participation, and the role of IEEE 1547 in interconnection. Provides slides and references aimed at regulators and utilities beginning to modernize interconnection practices.
Narang, D. et al NLR
Dec 31, 2021
5 Resources
5 Resources
Microgrid Controller Survey Report: 2024 Update
In the past decade, the number of microgrids deployed by electric utilities, end-use customers, and third parties has been increasing significantly both in the US and worldwide. The increase is driven by various reasons, such as carbon emission reduction, energy efficiency improve...
Liu, G. and Starke, M. Oak Ridge National Laboratory
Mar 31, 2024
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
Evaluation of Multi-Inverter Anti-Islanding With Grid Support and Ride-Through and Investigation of Island Detection Alternatives
The report, Evaluation of Multi-Inverter Anti-Islanding With Grid Support and Ride-Through and Investigation of Island Detection Alternatives, documents results from a set of laboratory simulations and experiments. This report documents results from a set of laboratory simulations...
Ropp, M. et al Sandia National Laboratories
Dec 31, 2018
Value Streams in Microgrids: A literature Review
Microgrids are an increasingly common component of the evolving electricity grids with the potential to improve local reliability, reduce costs, and increase penetration rates for distributed renewable generation. The additional complexity of microgrids often leads to increased in...
Stadler, M. et al Lawrence Berkeley National Laboratory
Dec 31, 2015
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
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