Analysis of Oscillation Energy Flow in IBRs Causing Poorly-Damped Natural SSO Modes

Lilan Karunaratne; Nilanjan Ray Chaudhuri; Sina Ameli; Constantino Lagoa

doi:10.1109/PESGM52009.2025.11225343

Analysis of Oscillation Energy Flow in IBRs Causing Poorly-Damped Natural SSO Modes

Lilan Karunaratne
, Nilanjan Ray Chaudhuri
, Sina Ameli
, Constantino Lagoa

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The theory of oscillation energy flow into synchronous generators has been well-studied and has led to popularity of dissipative energy flow-based oscillation source detection. On the contrary, very little exploration has been performed on developing the theory of oscillation energy dissipation of grid-following inverter-based resources (GFL IBRs), particularly in the context of poorly-damped natural subsynchronous oscillation (SSO) modes caused by the interaction of GFL IBRs with the rest of the grid. This paper develops analytical insights into the constituents of the path-dependent integrals of the oscillation energy from GFL IBRs and establishes their links with phase-locked-loop (PLL) and voltage controller parameters that are typically responsible for causing poorly-damped SSO modes. These findings are structured into lemmas and a theorem followed by validation through numerical simulations.

Original language	English (US)
Title of host publication	2025 IEEE Power and Energy Society General Meeting, PESGM 2025
Publisher	IEEE Computer Society
ISBN (Electronic)	9798331509958
DOIs	https://doi.org/10.1109/PESGM52009.2025.11225343
State	Published - 2025
Event	2025 IEEE Power and Energy Society General Meeting, PESGM 2025 - Austin, United States Duration: Jul 27 2025 → Jul 31 2025

Publication series

Name	IEEE Power and Energy Society General Meeting
ISSN (Print)	1944-9925
ISSN (Electronic)	1944-9933

Conference

Conference	2025 IEEE Power and Energy Society General Meeting, PESGM 2025
Country/Territory	United States
City	Austin
Period	7/27/25 → 7/31/25

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
Nuclear Energy and Engineering
Energy Engineering and Power Technology
Electrical and Electronic Engineering

Access to Document

10.1109/PESGM52009.2025.11225343

Cite this

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title = "Analysis of Oscillation Energy Flow in IBRs Causing Poorly-Damped Natural SSO Modes",

abstract = "The theory of oscillation energy flow into synchronous generators has been well-studied and has led to popularity of dissipative energy flow-based oscillation source detection. On the contrary, very little exploration has been performed on developing the theory of oscillation energy dissipation of grid-following inverter-based resources (GFL IBRs), particularly in the context of poorly-damped natural subsynchronous oscillation (SSO) modes caused by the interaction of GFL IBRs with the rest of the grid. This paper develops analytical insights into the constituents of the path-dependent integrals of the oscillation energy from GFL IBRs and establishes their links with phase-locked-loop (PLL) and voltage controller parameters that are typically responsible for causing poorly-damped SSO modes. These findings are structured into lemmas and a theorem followed by validation through numerical simulations.",

author = "Lilan Karunaratne and \{Ray Chaudhuri\}, Nilanjan and Sina Ameli and Constantino Lagoa",

note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 2025 IEEE Power and Energy Society General Meeting, PESGM 2025 ; Conference date: 27-07-2025 Through 31-07-2025",

year = "2025",

doi = "10.1109/PESGM52009.2025.11225343",

language = "English (US)",

series = "IEEE Power and Energy Society General Meeting",

publisher = "IEEE Computer Society",

booktitle = "2025 IEEE Power and Energy Society General Meeting, PESGM 2025",

address = "United States",

}

Karunaratne, L, Ray Chaudhuri, N, Ameli, S & Lagoa, C 2025, Analysis of Oscillation Energy Flow in IBRs Causing Poorly-Damped Natural SSO Modes. in 2025 IEEE Power and Energy Society General Meeting, PESGM 2025. IEEE Power and Energy Society General Meeting, IEEE Computer Society, 2025 IEEE Power and Energy Society General Meeting, PESGM 2025, Austin, United States, 7/27/25. https://doi.org/10.1109/PESGM52009.2025.11225343

Analysis of Oscillation Energy Flow in IBRs Causing Poorly-Damped Natural SSO Modes. / Karunaratne, Lilan; Ray Chaudhuri, Nilanjan; Ameli, Sina et al.
2025 IEEE Power and Energy Society General Meeting, PESGM 2025. IEEE Computer Society, 2025. (IEEE Power and Energy Society General Meeting).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Analysis of Oscillation Energy Flow in IBRs Causing Poorly-Damped Natural SSO Modes

AU - Karunaratne, Lilan

AU - Ray Chaudhuri, Nilanjan

AU - Ameli, Sina

AU - Lagoa, Constantino

PY - 2025

Y1 - 2025

N2 - The theory of oscillation energy flow into synchronous generators has been well-studied and has led to popularity of dissipative energy flow-based oscillation source detection. On the contrary, very little exploration has been performed on developing the theory of oscillation energy dissipation of grid-following inverter-based resources (GFL IBRs), particularly in the context of poorly-damped natural subsynchronous oscillation (SSO) modes caused by the interaction of GFL IBRs with the rest of the grid. This paper develops analytical insights into the constituents of the path-dependent integrals of the oscillation energy from GFL IBRs and establishes their links with phase-locked-loop (PLL) and voltage controller parameters that are typically responsible for causing poorly-damped SSO modes. These findings are structured into lemmas and a theorem followed by validation through numerical simulations.

AB - The theory of oscillation energy flow into synchronous generators has been well-studied and has led to popularity of dissipative energy flow-based oscillation source detection. On the contrary, very little exploration has been performed on developing the theory of oscillation energy dissipation of grid-following inverter-based resources (GFL IBRs), particularly in the context of poorly-damped natural subsynchronous oscillation (SSO) modes caused by the interaction of GFL IBRs with the rest of the grid. This paper develops analytical insights into the constituents of the path-dependent integrals of the oscillation energy from GFL IBRs and establishes their links with phase-locked-loop (PLL) and voltage controller parameters that are typically responsible for causing poorly-damped SSO modes. These findings are structured into lemmas and a theorem followed by validation through numerical simulations.

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DO - 10.1109/PESGM52009.2025.11225343

M3 - Conference contribution

AN - SCOPUS:105025193827

T3 - IEEE Power and Energy Society General Meeting

BT - 2025 IEEE Power and Energy Society General Meeting, PESGM 2025

PB - IEEE Computer Society

T2 - 2025 IEEE Power and Energy Society General Meeting, PESGM 2025

Y2 - 27 July 2025 through 31 July 2025

ER -

Analysis of Oscillation Energy Flow in IBRs Causing Poorly-Damped Natural SSO Modes

Abstract

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UN SDGs

All Science Journal Classification (ASJC) codes

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