SISO Transfer Functions for Stability Analysis of Grid-Connected Voltage-Source Converters

Hongyang Zhang; Xiongfei Wang; Lennart Harnefors; Hong Gong; Jean Philippe Hasler; Hans Peter Nee

doi:10.1109/TIA.2019.2898978

SISO Transfer Functions for Stability Analysis of Grid-Connected Voltage-Source Converters

Hongyang Zhang, Xiongfei Wang^*, Lennart Harnefors, Hong Gong, Jean Philippe Hasler, Hans Peter Nee

^*Corresponding author for this work

Research output: Contribution to journal › Journal article › Research › peer-review

52 Citations (Scopus)

Abstract

Converter-grid interaction is of great interest in a weak-grid condition. This paper presents a single-input-single-output (SISO) open-loop transfer function for the stability analysis of grid-connected voltage-source converters. Differing from the conventional input impedance method and the eigenvalue analysis, an alternative multi-input-multi-output closed-loop system is developed in the paper and it eventually yields an SISO open-loop transfer function. This enables the application of a single Nyquist curve for analyzing the overall system stability. The model is validated against time-domain simulations as well as experimental results showing excellent accuracy for predicting the system stability.

Original language	English
Article number	8640057
Journal	IEEE Transactions on Industry Applications
Volume	55
Issue number	3
Pages (from-to)	2931-2941
Number of pages	11
ISSN	0093-9994
DOIs	https://doi.org/10.1109/TIA.2019.2898978
Publication status	Published - May 2019

Keywords

Multi-input-multi-output (MIMO)
Nyquist stability criterion
Single-input-single-output (SISO)
Voltage-source converter (VSC)
Weak grid

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10.1109/TIA.2019.2898978

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Cite this

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title = "SISO Transfer Functions for Stability Analysis of Grid-Connected Voltage-Source Converters",

abstract = "Converter-grid interaction is of great interest in a weak-grid condition. This paper presents a single-input-single-output (SISO) open-loop transfer function for the stability analysis of grid-connected voltage-source converters. Differing from the conventional input impedance method and the eigenvalue analysis, an alternative multi-input-multi-output closed-loop system is developed in the paper and it eventually yields an SISO open-loop transfer function. This enables the application of a single Nyquist curve for analyzing the overall system stability. The model is validated against time-domain simulations as well as experimental results showing excellent accuracy for predicting the system stability.",

keywords = "Multi-input-multi-output (MIMO), Nyquist stability criterion, Single-input-single-output (SISO), Voltage-source converter (VSC), Weak grid",

author = "Hongyang Zhang and Xiongfei Wang and Lennart Harnefors and Hong Gong and Hasler, {Jean Philippe} and Nee, {Hans Peter}",

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AU - Zhang, Hongyang

AU - Wang, Xiongfei

AU - Harnefors, Lennart

AU - Gong, Hong

AU - Hasler, Jean Philippe

AU - Nee, Hans Peter

PY - 2019/5

Y1 - 2019/5

N2 - Converter-grid interaction is of great interest in a weak-grid condition. This paper presents a single-input-single-output (SISO) open-loop transfer function for the stability analysis of grid-connected voltage-source converters. Differing from the conventional input impedance method and the eigenvalue analysis, an alternative multi-input-multi-output closed-loop system is developed in the paper and it eventually yields an SISO open-loop transfer function. This enables the application of a single Nyquist curve for analyzing the overall system stability. The model is validated against time-domain simulations as well as experimental results showing excellent accuracy for predicting the system stability.

AB - Converter-grid interaction is of great interest in a weak-grid condition. This paper presents a single-input-single-output (SISO) open-loop transfer function for the stability analysis of grid-connected voltage-source converters. Differing from the conventional input impedance method and the eigenvalue analysis, an alternative multi-input-multi-output closed-loop system is developed in the paper and it eventually yields an SISO open-loop transfer function. This enables the application of a single Nyquist curve for analyzing the overall system stability. The model is validated against time-domain simulations as well as experimental results showing excellent accuracy for predicting the system stability.

KW - Multi-input-multi-output (MIMO)

KW - Nyquist stability criterion

KW - Single-input-single-output (SISO)

KW - Voltage-source converter (VSC)

KW - Weak grid

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DO - 10.1109/TIA.2019.2898978

M3 - Journal article

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JF - IEEE Transactions on Industry Applications

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SISO Transfer Functions for Stability Analysis of Grid-Connected Voltage-Source Converters

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Multi-Timescale Stability of Modular Cascaded Power Electronic Systems

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SISO Transfer Functions for Stability Analysis of Grid-Connected Voltage-Source Converters

Abstract

Keywords

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Multi-Timescale Stability of Modular Cascaded Power Electronic Systems

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