Impedance-Based Stability Analysis for Interconnected Converter Systems with Open-Loop RHP Poles

Yicheng Liao, Xiongfei Wang*

*Kontaktforfatter

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Resumé

The small-signal stability of interconnected converter systems can be tackled by the impedance-based analysis method, where the Bode plots of the individual impedances derived from subsystems are utilized for a design-oriented analysis. However, those methods only apply to the interconnected systems without having open-loop right half-plane (RHP) poles. This paper thus proposes a general stability analysis method based on Bode plots of individual impedances, which allows considering the open-loop RHP poles and shaping the impedances for stabilizing the system. Experimental case studies on the current control interactions of two paralleled grid-tied inverters validate the effectiveness of the method.
OriginalsprogEngelsk
TidsskriftIEEE Transactions on Power Electronics
ISSN0885-8993
DOI
StatusE-pub ahead of print - 2020

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Poles
Electric current control
Large scale systems

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title = "Impedance-Based Stability Analysis for Interconnected Converter Systems with Open-Loop RHP Poles",
abstract = "The small-signal stability of interconnected converter systems can be tackled by the impedance-based analysis method, where the Bode plots of the individual impedances derived from subsystems are utilized for a design-oriented analysis. However, those methods only apply to the interconnected systems without having open-loop right half-plane (RHP) poles. This paper thus proposes a general stability analysis method based on Bode plots of individual impedances, which allows considering the open-loop RHP poles and shaping the impedances for stabilizing the system. Experimental case studies on the current control interactions of two paralleled grid-tied inverters validate the effectiveness of the method.",
keywords = "Interconnected converters, Right half-plane poles, Bode plots, Impedance-based analysis, Stability",
author = "Yicheng Liao and Xiongfei Wang",
year = "2020",
doi = "10.1109/TPEL.2019.2939636",
language = "English",
journal = "I E E E Transactions on Power Electronics",
issn = "0885-8993",
publisher = "IEEE",

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TY - JOUR

T1 - Impedance-Based Stability Analysis for Interconnected Converter Systems with Open-Loop RHP Poles

AU - Liao, Yicheng

AU - Wang, Xiongfei

PY - 2020

Y1 - 2020

N2 - The small-signal stability of interconnected converter systems can be tackled by the impedance-based analysis method, where the Bode plots of the individual impedances derived from subsystems are utilized for a design-oriented analysis. However, those methods only apply to the interconnected systems without having open-loop right half-plane (RHP) poles. This paper thus proposes a general stability analysis method based on Bode plots of individual impedances, which allows considering the open-loop RHP poles and shaping the impedances for stabilizing the system. Experimental case studies on the current control interactions of two paralleled grid-tied inverters validate the effectiveness of the method.

AB - The small-signal stability of interconnected converter systems can be tackled by the impedance-based analysis method, where the Bode plots of the individual impedances derived from subsystems are utilized for a design-oriented analysis. However, those methods only apply to the interconnected systems without having open-loop right half-plane (RHP) poles. This paper thus proposes a general stability analysis method based on Bode plots of individual impedances, which allows considering the open-loop RHP poles and shaping the impedances for stabilizing the system. Experimental case studies on the current control interactions of two paralleled grid-tied inverters validate the effectiveness of the method.

KW - Interconnected converters

KW - Right half-plane poles

KW - Bode plots

KW - Impedance-based analysis

KW - Stability

U2 - 10.1109/TPEL.2019.2939636

DO - 10.1109/TPEL.2019.2939636

M3 - Journal article

JO - I E E E Transactions on Power Electronics

JF - I E E E Transactions on Power Electronics

SN - 0885-8993

ER -