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Study of Inverter Control Strategies on the Stability of Low-Inertia Microgrid Systems
This paper investigates the stability of low-inertia microgrid systems with two control strategies that have different percentages of grid-forming (GFM) inverters. The first control strategy has approximately 50% GFM inverters, and all the battery inverters are working in GFM con...
Wang, J. and Saraswat, G. NLR
Dec 31, 2021
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
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
Quantitative Small-Signal Stability Analysis of Grid-Forming Inverters in Large-Scale Power Systems
In this paper, the challenges induced by the integration of inverter-based resources (IBRs) into existing power systems are discussed. Although the grid-forming (GFM) control has been used to enhance system performance in multiple sections of electric power systems (e.g., transmis...
Ding, L. et al Purdue University
Dec 31, 2022
Droop Control-Based Dispatch of an Islanded Microgrid with Multiple Grid-Forming Sources
Before rotating, fossil fuel-based, synchronous generators (SGs) are phased out, in line with renewable generation goals, grid-forming (GFM) inverters are expected to parallel SGs. Primary droop control allows GFM inverters to share power without communication; however, it is nece...
Ganguly, S. et al NLR
Dec 31, 2022
Design Power Control Strategies of Grid-Forming Inverters for Microgrid Application
This paper develops and compares two control schemes in the application control layer of a non-phase-locked loop (non-PLL) grid-forming (GFM) inverter to gain insight and understanding into how the two schemes affect the dynamic responses of GFM inverters and the transition operat...
Wang, J. NLR
Dec 31, 2020
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
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
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
An Innovative Energy Management System for Microgrids with Multiple Grid-Forming Inverters
As increasingly more grid-forming (GFM) inverter-based resources replace traditional fossil-fueled synchronous generators as the GFM sources in microgrids, the existing microgrid energy management systems (EMS) need to be updated to control and coordinate multiple GFM inverters th...
Comden, J. and Wang, J. NLR
Dec 31, 2023
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