Sequence Impedance Modeling of Grid-Forming Converters: Preprint

Weihang Yan; Shahil Shah; Vahan Gevorgian; David Wenzhong Gao

Sequence Impedance Modeling of Grid-Forming Converters: Preprint

Weihang Yan, Shahil Shah, Vahan Gevorgian, David Wenzhong Gao

Power Systems Engineering

University of Denver

Research output: Contribution to conference › Paper

Abstract

Grid-forming control of inverter-based resources (IBRs) has been identified as a critical technology for operating power systems with high levels of inverter-based resources. This paper presents sequence impedance modeling of grid-forming inverters to evaluate its small-signal stability properties. Droop based grid-forming control with full consideration of the multiloop structure is studied, 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	8
State	Published - 2021
Event	2021 IEEE Power and Energy Society General Meeting - Duration: 25 Jul 2021 → 29 Jul 2021

Conference

Conference	2021 IEEE Power and Energy Society General Meeting
Period	25/07/21 → 29/07/21

Bibliographical note

See NREL/CP-5D00-82307 for paper as published in proceedings

NREL Publication Number

NREL/CP-5D00-78234

Keywords

grid-following converter
grid-forming converter
impedance modeling
stability

Access to Document

https://www.nrel.gov/docs/fy21osti/78234.pdf

Cite this

@conference{56805409382743b1b35fcef2d822dcb7,

title = "Sequence Impedance Modeling of Grid-Forming Converters: Preprint",

abstract = "Grid-forming control of inverter-based resources (IBRs) has been identified as a critical technology for operating power systems with high levels of inverter-based resources. This paper presents sequence impedance modeling of grid-forming inverters to evaluate its small-signal stability properties. Droop based grid-forming control with full consideration of the multiloop structure is studied, 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 converter, grid-forming converter, impedance modeling, stability",

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

note = "See NREL/CP-5D00-82307 for paper as published in proceedings; 2021 IEEE Power and Energy Society General Meeting ; Conference date: 25-07-2021 Through 29-07-2021",

year = "2021",

language = "American English",

}

TY - CONF

T1 - Sequence Impedance Modeling of Grid-Forming Converters: Preprint

AU - Yan, Weihang

AU - Shah, Shahil

AU - Gevorgian, Vahan

AU - Gao, David Wenzhong

N1 - See NREL/CP-5D00-82307 for paper as published in proceedings

PY - 2021

Y1 - 2021

N2 - Grid-forming control of inverter-based resources (IBRs) has been identified as a critical technology for operating power systems with high levels of inverter-based resources. This paper presents sequence impedance modeling of grid-forming inverters to evaluate its small-signal stability properties. Droop based grid-forming control with full consideration of the multiloop structure is studied, 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 (IBRs) has been identified as a critical technology for operating power systems with high levels of inverter-based resources. This paper presents sequence impedance modeling of grid-forming inverters to evaluate its small-signal stability properties. Droop based grid-forming control with full consideration of the multiloop structure is studied, 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 converter

KW - grid-forming converter

KW - impedance modeling

KW - stability

M3 - Paper

T2 - 2021 IEEE Power and Energy Society General Meeting

Y2 - 25 July 2021 through 29 July 2021

ER -

Sequence Impedance Modeling of Grid-Forming Converters: Preprint

Abstract

Conference

Bibliographical note

NREL Publication Number

Keywords

Access to Document

Fingerprint

Cite this