Stability Assessment of A Radial Grid With Power Converters

Xingqi Liu; Zhixiang Zou; Jiajun Yang; Jian Tang; Zhiren Liu; Giampaolo Buticchi; Zheng Wang; Ming Cheng

doi:10.1109/OJPEL.2021.3138509

Stability Assessment of A Radial Grid With Power Converters

Xingqi Liu, Zhixiang Zou, Jiajun Yang, Jian Tang, Zhiren Liu, Giampaolo Buticchi, Zheng Wang, Ming Cheng

Research output: Journal Publication › Article › peer-review

14 Citations (Scopus)

Abstract

The increase proportion of power converters causes stability problems in the radial grid. To address these issues, this paper firstly proposes a unified modeling procedure and applies it to two types of converters. Secondly, the impedance models are used to analyze the stability of a radial grid with converters under four cases. The influence of the short circuit ratio (SCR) and line impedance on system stability are investigated. Then, a comprehensive sensitivity analysis is performed in order to investigate the effects of parameters variations on the closed-loop poles of the system under different conditions. Finally, the accuracy of the model and theoretical analysis are verified by simulations and Hardware-in-the-Loop (HiL) tests.

Original language	English
Pages (from-to)	61-74
Number of pages	14
Journal	IEEE Open Journal of Power Electronics
Volume	3
DOIs	https://doi.org/10.1109/OJPEL.2021.3138509
Publication status	Published - 2022

Keywords

Complex frequency domain
Grid-following converter
Grid-forming converter
Impedance model
Radial grid
Sensitivity analysis
Stability

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/OJPEL.2021.3138509

Cite this

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title = "Stability Assessment of A Radial Grid With Power Converters",

abstract = "The increase proportion of power converters causes stability problems in the radial grid. To address these issues, this paper firstly proposes a unified modeling procedure and applies it to two types of converters. Secondly, the impedance models are used to analyze the stability of a radial grid with converters under four cases. The influence of the short circuit ratio (SCR) and line impedance on system stability are investigated. Then, a comprehensive sensitivity analysis is performed in order to investigate the effects of parameters variations on the closed-loop poles of the system under different conditions. Finally, the accuracy of the model and theoretical analysis are verified by simulations and Hardware-in-the-Loop (HiL) tests.",

keywords = "Complex frequency domain, Grid-following converter, Grid-forming converter, Impedance model, Radial grid, Sensitivity analysis, Stability",

author = "Xingqi Liu and Zhixiang Zou and Jiajun Yang and Jian Tang and Zhiren Liu and Giampaolo Buticchi and Zheng Wang and Ming Cheng",

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doi = "10.1109/OJPEL.2021.3138509",

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T1 - Stability Assessment of A Radial Grid With Power Converters

AU - Liu, Xingqi

AU - Zou, Zhixiang

AU - Yang, Jiajun

AU - Tang, Jian

AU - Liu, Zhiren

AU - Buticchi, Giampaolo

AU - Wang, Zheng

AU - Cheng, Ming

PY - 2022

Y1 - 2022

N2 - The increase proportion of power converters causes stability problems in the radial grid. To address these issues, this paper firstly proposes a unified modeling procedure and applies it to two types of converters. Secondly, the impedance models are used to analyze the stability of a radial grid with converters under four cases. The influence of the short circuit ratio (SCR) and line impedance on system stability are investigated. Then, a comprehensive sensitivity analysis is performed in order to investigate the effects of parameters variations on the closed-loop poles of the system under different conditions. Finally, the accuracy of the model and theoretical analysis are verified by simulations and Hardware-in-the-Loop (HiL) tests.

AB - The increase proportion of power converters causes stability problems in the radial grid. To address these issues, this paper firstly proposes a unified modeling procedure and applies it to two types of converters. Secondly, the impedance models are used to analyze the stability of a radial grid with converters under four cases. The influence of the short circuit ratio (SCR) and line impedance on system stability are investigated. Then, a comprehensive sensitivity analysis is performed in order to investigate the effects of parameters variations on the closed-loop poles of the system under different conditions. Finally, the accuracy of the model and theoretical analysis are verified by simulations and Hardware-in-the-Loop (HiL) tests.

KW - Complex frequency domain

KW - Grid-following converter

KW - Grid-forming converter

KW - Impedance model

KW - Radial grid

KW - Sensitivity analysis

KW - Stability

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JO - IEEE Open Journal of Power Electronics

JF - IEEE Open Journal of Power Electronics

ER -

Stability Assessment of A Radial Grid With Power Converters

Abstract

Keywords

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