Impedance Decomposition for Design-Oriented Analysis of Grid-Forming Voltage-Source Converters

Liao, Yicheng; wang, xiongfei

doi:10.36227/techrxiv.12855167.v1

Cited by 3 publications

(9 citation statements)

References 45 publications

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“…11. That means the SSO instability tends to happen in a strong grid under the same droop gains in voltage-type VSCs, which coincides with results in [36,62].…”

Section: A Grid Strength (Slow-and Fast-interactions)supporting

confidence: 83%

“…To limit the scope of this paper, the dc-link dynamics are ignored considering only the dc/ac and ac/dc stages. [36,37]. 3.…”

Section: Mechanisms Of Control Dynamics-induced Converter-driven Stab...mentioning

confidence: 99%

“…It is found that the voltage-loop will make the converter prone to be less damped and lose system stability more easily since the stable region is reduced with inner V-I control. Besides, it is found in [36] that a larger voltage control bandwidth may enhance system SSO stability. Additionally, the Q-v droop impact on system stability is weaker than the p-f droop.…”

Section: ) Droop Controlmentioning

confidence: 99%

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Review of Small-Signal Converter-Driven Stability Issues in Power Systems

Kong

Xue

Qiao

et al. 2022

IEEE Open J. Power Energy

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New grid devices based on power electronics technologies are increasingly emerging and introduce two new types of stability issues into power systems, which are different from traditional power system stability phenomena and not well understood from a system perspective. This paper intends to provide the state of the art on this topic with a thorough and detailed review of the converter-driven stability issues in partial or all power electronics-based grids. The underlying and fundamental mechanisms of the converter-driven stability issues are uncovered through different types of root causes, including converter controls, grid strength, loads, and converter operating points. Furthermore, a six-inverter two-area meshed system is constructed as a representative test case to demonstrate these unstable phenomena. Finally, the challenges to cope with the converter-driven stability issues in future power electronics-based grids are identified to elucidate new research trends.

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“…11. That means the SSO instability tends to happen in a strong grid under the same droop gains in voltage-type VSCs, which coincides with results in [36,62].…”

Section: A Grid Strength (Slow-and Fast-interactions)supporting

confidence: 83%

“…To limit the scope of this paper, the dc-link dynamics are ignored considering only the dc/ac and ac/dc stages. [36,37]. 3.…”

Section: Mechanisms Of Control Dynamics-induced Converter-driven Stab...mentioning

confidence: 99%

Section: ) Droop Controlmentioning

confidence: 99%

See 1 more Smart Citation

Review of Small-Signal Converter-Driven Stability Issues in Power Systems

Kong

Xue

Qiao

et al. 2022

IEEE Open J. Power Energy

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show abstract

“…Interactions between the voltage control loop and outer power control loops in GFM converters can also lead to instable oscillations [39]. In [40] it is determined that those instabilities are more sensitive to the voltage and active power control than to the reactive power control. Furthermore, it is presented that a larger voltage control bandwidth can increase the stability and instabilities can be prevented by appropriate tuning of the voltage and active power control parameters.…”

Section: B: Voltage and Power Controlmentioning

confidence: 99%

Classification of Converter-Driven Stability and Suitable Modeling and Analysis Methods

Eckel,

Babazadeh,

Becker

2024

IEEE Access

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The significant increase of converter interfaced generation, consumption, storage, and transmission in power systems, results in the need to consider converter-driven stability in detail, as well as to study modelling and analysis methods with which such stability effects can be represented and investigated. Due to the multiple causes of converter-driven stability effects, a classification into further categories of fast and slow converter-driven stability is necessary, which is systematically presented in this paper. We further provide a detailed overview on appropriate modelling methods including static, quasi-dynamic and dynamic modelling and their respective applications. Typical analysis methods such as eigenvalue and impedance based analysis are explained and related to the previous modelling approaches. Based on that, a guide to which modelling and analysis method is appropriate for which type of converterdriven stability, is provided. In addition, open and recent research questions with regard to studies on nonlinear analyses of large systems with acceptable computational costs are pointed out.

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“…The impedance-based analytical method serves as a promising approach to investigate the control interactions in converter-based systems [65]- [68]. The dc-link impedance can characterize the interactions of interconnected systems through the dc bus [65].…”

Section: Sources and Loads Application Scenariomentioning

confidence: 99%

Stability and Control of Grid-Forming Converters with Regulated DC-Link Dynamics

Zhao

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Impedance Decomposition for Design-Oriented Analysis of Grid-Forming Voltage-Source Converters

Cited by 3 publications

References 45 publications

Review of Small-Signal Converter-Driven Stability Issues in Power Systems

Review of Small-Signal Converter-Driven Stability Issues in Power Systems

Classification of Converter-Driven Stability and Suitable Modeling and Analysis Methods

Stability and Control of Grid-Forming Converters with Regulated DC-Link Dynamics

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