Synchronization Stability Analysis Under Ultra-Weak Grid Considering Reactive Current Dynamics

Bin Hu; Ling Zhan; Subham Sahoo; Liang Chen; Heng Nian; Frede Blaabjerg

doi:10.1109/TIE.2024.3370947

Synchronization Stability Analysis Under Ultra-Weak Grid Considering Reactive Current Dynamics

Bin Hu, Ling Zhan, Subham Sahoo, Liang Chen, Heng Nian, Frede Blaabjerg

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

Abstract

The synchronization stability of grid-following converter has attracted extensive attention. It has been reported that the transient synchronization behavior during a grid fault is dominated by the phase-locked loop (PLL), while the current loop is always approximated as a unity gain. Nevertheless, this letter notices that the reactive current dynamics will also influence the synchronization stability under ultra-weak grid, which increases the risk of losing synchronization, and causes the PLL output frequency to be outside the limitation. Accordingly, a refined fourth-order model is proposed to reveal the above underlying mechanism and quantify this coupling effect.

Original language	English
Journal	I E E E Transactions on Industrial Electronics
Pages (from-to)	1-4
Number of pages	4
ISSN	0278-0046
DOIs	https://doi.org/10.1109/TIE.2024.3370947
Publication status	Published - 20 Mar 2024

Keywords

Current Dynamics
Grid-following converter
Phase locked loop
Synchronization Stability
ultra-weak grid
Power system stability
Circuit faults
Synchronization
Phase locked loops
phase-locked loop (PLL)
Current dynamics
Stability criteria
synchronization stability
grid-following converter (GFC)
Circuit stability
Transient analysis

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title = "Synchronization Stability Analysis Under Ultra-Weak Grid Considering Reactive Current Dynamics",

abstract = "The synchronization stability of grid-following converter has attracted extensive attention. It has been reported that the transient synchronization behavior during a grid fault is dominated by the phase-locked loop (PLL), while the current loop is always approximated as a unity gain. Nevertheless, this letter notices that the reactive current dynamics will also influence the synchronization stability under ultra-weak grid, which increases the risk of losing synchronization, and causes the PLL output frequency to be outside the limitation. Accordingly, a refined fourth-order model is proposed to reveal the above underlying mechanism and quantify this coupling effect.",

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author = "Bin Hu and Ling Zhan and Subham Sahoo and Liang Chen and Heng Nian and Frede Blaabjerg",

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doi = "10.1109/TIE.2024.3370947",

language = "English",

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journal = "I E E E Transactions on Industrial Electronics",

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T1 - Synchronization Stability Analysis Under Ultra-Weak Grid Considering Reactive Current Dynamics

AU - Hu, Bin

AU - Zhan, Ling

AU - Sahoo, Subham

AU - Chen, Liang

AU - Nian, Heng

AU - Blaabjerg, Frede

PY - 2024/3/20

Y1 - 2024/3/20

N2 - The synchronization stability of grid-following converter has attracted extensive attention. It has been reported that the transient synchronization behavior during a grid fault is dominated by the phase-locked loop (PLL), while the current loop is always approximated as a unity gain. Nevertheless, this letter notices that the reactive current dynamics will also influence the synchronization stability under ultra-weak grid, which increases the risk of losing synchronization, and causes the PLL output frequency to be outside the limitation. Accordingly, a refined fourth-order model is proposed to reveal the above underlying mechanism and quantify this coupling effect.

AB - The synchronization stability of grid-following converter has attracted extensive attention. It has been reported that the transient synchronization behavior during a grid fault is dominated by the phase-locked loop (PLL), while the current loop is always approximated as a unity gain. Nevertheless, this letter notices that the reactive current dynamics will also influence the synchronization stability under ultra-weak grid, which increases the risk of losing synchronization, and causes the PLL output frequency to be outside the limitation. Accordingly, a refined fourth-order model is proposed to reveal the above underlying mechanism and quantify this coupling effect.

KW - Current Dynamics

KW - Grid-following converter

KW - Phase locked loop

KW - Synchronization Stability

KW - ultra-weak grid

KW - Power system stability

KW - Circuit faults

KW - Synchronization

KW - Phase locked loops

KW - phase-locked loop (PLL)

KW - Current dynamics

KW - Stability criteria

KW - synchronization stability

KW - grid-following converter (GFC)

KW - Circuit stability

KW - Transient analysis

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U2 - 10.1109/TIE.2024.3370947

DO - 10.1109/TIE.2024.3370947

M3 - Journal article

SN - 0278-0046

SP - 1

EP - 4

JO - I E E E Transactions on Industrial Electronics

JF - I E E E Transactions on Industrial Electronics

ER -

Synchronization Stability Analysis Under Ultra-Weak Grid Considering Reactive Current Dynamics

Abstract

Keywords

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