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Geothermal Energy and Resilience in Arctic Countries
The eight Arctic countries Iceland, Canada, Denmark (Greenland and the Faroe Islands) Norway, Sweden, Finland, Russia, and the United States (Alaska) have diverse energy systems, but can be split into two distinct groups based on energy characteristics. The first group includes sy...
Kolker, A. et al NLR
Dec 31, 2021
Circulating Current Reduction of Back-to-Back MMC with Advanced Grid-Support Functionalities for Medium-Voltage Applications
A Lyapunov energy function based circulating current reduction scheme for a back to back modular multilevel converter based system for a microgrid application has been proposed in this digest. In order to ensure no circulating or zero sequence currents within the modules, the dyn...
Roy Chowdhury, V. et al NLR
Dec 31, 2022
Virtual Cable Impedance based Load Sharing in a Microgrid for Parallel Connected Grid Forming Converters
This paper presents a novel approach to power sharing between direct connected grid-forming converters, utilizing virtual cable impedance and droop-based outer loop control. To enhance stability, resistive droop is implemented, while virtual cable impedance with non-zero resistive...
Roy Chowdhury, V. et al NLR
Dec 31, 2024
Networked Microgrids for Improved Resilient Operation: A Case Study in Adjuntas Puerto Rico
This paper presents a case study of a network microgrid orchestrator designed to allow coordinated operation of microgrids. Through Control Hardware in the Loop (CHIL), the proposed microgrid orchestrator was validated using, as case study two community-owned microgrids in Adjunta...
Ferrari, M. et al Oak Ridger National Laboratory
Oct 31, 2023
Load Control for Frequency Response A Literature Review
As electricity grids employ greater fractions of renewable energy, which introduce additional variability and uncertainty in the net-load, balancing electrical load and generation becomes more challenging. This paper reviews the literature documenting physical simulations and real...
Anderson, B. et al NLR
Jan 31, 2022
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
Use of Traveling Wave Signatures in Medium-Voltage Distribution Systems for Fault Detection and Location
Protection systems are a critical feature for the proper operation of a power grid. Protection systems should be able to quickly detect, identify, locate, and isolate the faults within a time frame that prevents damage to grid components and reduces customer outages. As more inver...
Prabakar, K. et al NLR
Jul 31, 2021
A Cyber-Resilience Risk Management Architecture for Distributed Wind
Distributed wind is an electric energy resource segment with strong potential to be deployed in many applications, but special consideration of resilience and cybersecurity is needed to address the unique conditions associated with distributed wind. Distributed wind is a strong ca...
Culler, M. et al Idaho National Laboratory
Oct 17, 2021
Inverter Controls for Smooth Transition Operation of Networked Microgrids
Islanding sections of a distribution grid as microgrids and networking these microgrids offer promising opportunities for improving system reliability; however, this approach may need distributed energy resources (DERs) to switch between grid-connected and islanded operation witho...
Sawant, J. et al NLR
Dec 31, 2022
A Novel Resilience-Oriented Cellular Grid Formation Approach for Distribution Systems with Behind-the-Meter Distributed Energy Resources
This paper presents a resilience-oriented cellular grid formation approach to achieve scalable and reconfigurable community microgrid operations for distribution systems with behind-the-meter distributed energy resources. A set of interconnected solar photovoltaics, energy storage...
Kumar, U. and Ding, F. NLR
Dec 31, 2022
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