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Universal Passive Synchronization Method for Grid-Forming Inverters Without Mode Transition
Power systems are transforming with increasing levels of inverter-based resources (IBRs). This transformation requires critical roles of grid-forming (GFM) inverters replacing synchronous generators for bulk power system stabilization and ancillary services, also allowing flexible...
Chang, H. et al NLR
Dec 31, 2022
Revision of IEEE Standard 1547: New Reactive Power and Voltage Regulation Capability Requirements
This article is the second in a four-part series regarding the IEEE standard 1547 and its impact on the electric grid. The background and purpose of this standard was reviewed in the first article, Revision of IEEE Standard 1547: The Background for Change. This article focuses on...
Walling, R. Walling Energy Systems Consulting, LLC
Dec 01, 2016
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
Coupled Transmission and Distribution Simulations To Assess Distributed Energy Resource To Power System Faults
This resource describes a methodology that couples transmission and distribution system simulations to assess how distributed energy resources (DER) affect power-system fault responses. By linking detailed distribution models with bulk power system models, researchers can evaluate...
Kenyon, R. et al University of Colorado Boulder
Nov 30, 2020
High-Penetration Photovoltaic Integration Handbook for Distribution Engineers
This handbook, produced by NREL, offers practical guidance for distribution engineers facing high penetration of photovoltaic (PV) systems on their networks. It addresses technical challenges such as voltage regulation, protection coordination, reverse power flow, and transformer ...
Seguin, R. et al NLR
Dec 31, 2015
Controller Hardware-in-the-Loop Evaluation of a Microgrid Controller for a Microgrid System with Multiple Grid-Forming Inverters
This paper presents the laboratory evaluation of a commercial Microgrid Management System (MGMS) implemented in the real-world Bronzeville Microgrid which features a futuristic scenario with high renewable energy integration and the use of multiple Grid-Forming (GFM) inverters. Th...
Xie, F. et al NLR
Dec 31, 2024
Dynamic Shaping of Grid Response of Multi-Machine Multi-Inverter Systems Through Grid-Forming IBRs: Preprint
We consider the problem of controlling the frequency response of weakly-coupled multi-machine multi-inverter low-inertia power systems via grid-forming inverter-based resources (IBRs). In contrast to existing methods, our approach relies on dividing the larger system into multiple...
Poolla, B. et al NLR
Jun 30, 2024
The Advanced Microgrid: Integration and Interoperability
Produced by Sandia National Laboratories, this paper examines the concept of the advanced microgrid and the need for integration and interoperability across hardware, software, and communications interfaces. It discusses the evolution from traditional islanded microgrids to system...
Bower, W. et al Sandia National Laboratories
Feb 28, 2014
Flexible Operation of Microgrids Through Operator-Configurable Microgrid Controllers
Microgrids are becoming critical assets in power distribution systems. This is partly due to the resiliency and reliability challenges faced by power distribution systems in the last decade and partly due to the increased integration of distributed energy resource assets, such as ...
Curtiss, P. et al SandC Electric Company
Dec 31, 2024
Regulating Voltage: Recommendations for Smart Inverters
This report from GridLab provides recommendations for regulators and utilities on leveraging the advanced capabilities of smart inverters to manage voltage on distribution networks with high penetrations of solar and other DERs. It explains how functions such as volt VAR, frequenc...
O’Connell, R. et al GridLab
Sep 11, 2019
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