Sequence Impedance Modeling of Grid-Forming Inverters

Weihang Yan; Shahil Shah; Vahan Gevorgian; David Gao

doi:10.1109/PESGM46819.2021.9638001

Sequence Impedance Modeling of Grid-Forming Inverters

Weihang Yan, Shahil Shah, Vahan Gevorgian, David Gao

Power Systems Engineering

University of Denver

Research output: Contribution to conference › Paper › peer-review

12 Scopus Citations

Abstract

Grid-forming control of inverter-based resources has been identified as a critical technology for operating power systems with high levels of inverter-based resources. This paper presents the sequence impedance modeling of a grid-forming inverter to evaluate its small-signal stability properties. Droop control structure is implemented to control the inverter in grid-forming mode, and the impact of individual controller on the inverter impedance characteristics is discussed. The developed sequence impedance model is compared with that of the grid-following inverter. It is found from the developed sequence impedance models that grid-forming inverters are less prone to harmonic resonance problems during operation with weaker grids. The developed models are validated using PSCAD simulations.

Original language	American English
Number of pages	5
DOIs	https://doi.org/10.1109/PESGM46819.2021.9638001 https://doi.org/10.1109/PESGM46819.2021.9638001
State	Published - 2021
Event	2021 IEEE Power and Energy Society General Meeting, PESGM 2021 - Washington, United States Duration: 26 Jul 2021 → 29 Jul 2021

Conference

Conference	2021 IEEE Power and Energy Society General Meeting, PESGM 2021
Country/Territory	United States
City	Washington
Period	26/07/21 → 29/07/21

Bibliographical note

See NREL/CP-5D00-78234 for preprint

NREL Publication Number

NREL/CP-5D00-82307

Keywords

grid- following inverter
grid-forming inverter
impedance modeling
stability

UN SDGs

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

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Cite this

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title = "Sequence Impedance Modeling of Grid-Forming Inverters",

abstract = "Grid-forming control of inverter-based resources has been identified as a critical technology for operating power systems with high levels of inverter-based resources. This paper presents the sequence impedance modeling of a grid-forming inverter to evaluate its small-signal stability properties. Droop control structure is implemented to control the inverter in grid-forming mode, and the impact of individual controller on the inverter impedance characteristics is discussed. The developed sequence impedance model is compared with that of the grid-following inverter. It is found from the developed sequence impedance models that grid-forming inverters are less prone to harmonic resonance problems during operation with weaker grids. The developed models are validated using PSCAD simulations.",

keywords = "grid- following inverter, grid-forming inverter, impedance modeling, stability",

author = "Weihang Yan and Shahil Shah and Vahan Gevorgian and David Gao",

note = "See NREL/CP-5D00-78234 for preprint; 2021 IEEE Power and Energy Society General Meeting, PESGM 2021 ; Conference date: 26-07-2021 Through 29-07-2021",

year = "2021",

doi = "10.1109/PESGM46819.2021.9638001",

language = "American English",

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T1 - Sequence Impedance Modeling of Grid-Forming Inverters

AU - Yan, Weihang

AU - Shah, Shahil

AU - Gevorgian, Vahan

AU - Gao, David

N1 - See NREL/CP-5D00-78234 for preprint

PY - 2021

Y1 - 2021

N2 - Grid-forming control of inverter-based resources has been identified as a critical technology for operating power systems with high levels of inverter-based resources. This paper presents the sequence impedance modeling of a grid-forming inverter to evaluate its small-signal stability properties. Droop control structure is implemented to control the inverter in grid-forming mode, and the impact of individual controller on the inverter impedance characteristics is discussed. The developed sequence impedance model is compared with that of the grid-following inverter. It is found from the developed sequence impedance models that grid-forming inverters are less prone to harmonic resonance problems during operation with weaker grids. The developed models are validated using PSCAD simulations.

AB - Grid-forming control of inverter-based resources has been identified as a critical technology for operating power systems with high levels of inverter-based resources. This paper presents the sequence impedance modeling of a grid-forming inverter to evaluate its small-signal stability properties. Droop control structure is implemented to control the inverter in grid-forming mode, and the impact of individual controller on the inverter impedance characteristics is discussed. The developed sequence impedance model is compared with that of the grid-following inverter. It is found from the developed sequence impedance models that grid-forming inverters are less prone to harmonic resonance problems during operation with weaker grids. The developed models are validated using PSCAD simulations.

KW - grid- following inverter

KW - grid-forming inverter

KW - impedance modeling

KW - stability

UR - http://www.scopus.com/inward/record.url?scp=85124147924&partnerID=8YFLogxK

U2 - 10.1109/PESGM46819.2021.9638001

DO - 10.1109/PESGM46819.2021.9638001

M3 - Paper

AN - SCOPUS:85124147924

T2 - 2021 IEEE Power and Energy Society General Meeting, PESGM 2021

Y2 - 26 July 2021 through 29 July 2021

ER -

Sequence Impedance Modeling of Grid-Forming Inverters

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

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