Large-Signal Stability Assessment for Islanded MGs With a Mix of Grid-Following and Grid-Forming Inverters: A Networked Oscillators-Based Approach

Shu Gao; Hanbin Dang; Lei Wang; Yuhua Du; Xiaonan Gao; Hongjian Lin; Yigeng Huangfu

doi:10.1109/TPEL.2025.3605581

Large-Signal Stability Assessment for Islanded MGs With a Mix of Grid-Following and Grid-Forming Inverters: A Networked Oscillators-Based Approach

Shu Gao
, Hanbin Dang
, Lei Wang
, Yuhua Du
, Xiaonan Gao
, Hongjian Lin
, Yigeng Huangfu

School of Automation

Research output: Contribution to journal › Article › peer-review

Abstract

This letter proposes a networked oscillators-based approach to analyze the large-signal stability of inverter-dominated microgrids (MGs). Compared with the conventional methods, the proposed analysis is applicable to islanded MGs with a mix of grid-following and grid-forming inverters. The equivalent networked oscillator model of such MGs with a general topology is developed, and the system’s frequency stability domain is analytically derived. A stability evaluation scheme is proposed accordingly and its effectiveness has been validated on a controller hardware-in-the-loop testbed for multiinverter applications.

Original language	English
Pages (from-to)	190-196
Number of pages	7
Journal	IEEE Transactions on Power Electronics
Volume	41
Issue number	1
DOIs	https://doi.org/10.1109/TPEL.2025.3605581
State	Published - Jan 2026

Keywords

Grid-following (GFL) inverter
grid-forming (GFM) inverter
islanded microgrid (MG)
large signal stability
networked oscillators

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10.1109/TPEL.2025.3605581

Cite this

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title = "Large-Signal Stability Assessment for Islanded MGs With a Mix of Grid-Following and Grid-Forming Inverters: A Networked Oscillators-Based Approach",

abstract = "This letter proposes a networked oscillators-based approach to analyze the large-signal stability of inverter-dominated microgrids (MGs). Compared with the conventional methods, the proposed analysis is applicable to islanded MGs with a mix of grid-following and grid-forming inverters. The equivalent networked oscillator model of such MGs with a general topology is developed, and the system{\textquoteright}s frequency stability domain is analytically derived. A stability evaluation scheme is proposed accordingly and its effectiveness has been validated on a controller hardware-in-the-loop testbed for multiinverter applications.",

keywords = "Grid-following (GFL) inverter, grid-forming (GFM) inverter, islanded microgrid (MG), large signal stability, networked oscillators",

author = "Shu Gao and Hanbin Dang and Lei Wang and Yuhua Du and Xiaonan Gao and Hongjian Lin and Yigeng Huangfu",

note = "Publisher Copyright: {\textcopyright} 1986-2012 IEEE.",

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doi = "10.1109/TPEL.2025.3605581",

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AU - Gao, Shu

AU - Dang, Hanbin

AU - Wang, Lei

AU - Du, Yuhua

AU - Gao, Xiaonan

AU - Lin, Hongjian

AU - Huangfu, Yigeng

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AB - This letter proposes a networked oscillators-based approach to analyze the large-signal stability of inverter-dominated microgrids (MGs). Compared with the conventional methods, the proposed analysis is applicable to islanded MGs with a mix of grid-following and grid-forming inverters. The equivalent networked oscillator model of such MGs with a general topology is developed, and the system’s frequency stability domain is analytically derived. A stability evaluation scheme is proposed accordingly and its effectiveness has been validated on a controller hardware-in-the-loop testbed for multiinverter applications.

KW - Grid-following (GFL) inverter

KW - grid-forming (GFM) inverter

KW - islanded microgrid (MG)

KW - large signal stability

KW - networked oscillators

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Large-Signal Stability Assessment for Islanded MGs With a Mix of Grid-Following and Grid-Forming Inverters: A Networked Oscillators-Based Approach

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Keywords

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