Adaptive Tuning of Phase-Locked Loop Parameters for Grid-Connected Inverters in Weak Grid Cases

Ling, Zihan; Xu, Jinming; Wu, Yuchen; Hu, Yuan; Xie, Shaojun

doi:10.1109/iciea51954.2021.9516438

Cited by 2 publications

(2 citation statements)

References 15 publications

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“…Therefore, impedance estimation is an important research topic in the power electronics community as it allows grid monitoring (with an impedance estimation done during grid operation) [4], [5], [6], grid event detection (e.g. grid reconfigurations) [7], [8] and potentially converter adaptation [9], [10] during grid operation.…”

Section: Introductionmentioning

confidence: 99%

An Asymmetric Perturbation Signal for Enhanced Perturbation Injection Capabilities of a Grid-connected Converter

Mace,

Cervone,

Dujic

2024

2024 IEEE Applied Power Electronics Conference and Exposition (APEC)

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Impedance estimation is an important tool for gridconverter interaction evaluation. Using existing grid-connected converters for perturbation injection enables grid impedance estimation during operation without additional hardware (namely dedicated perturbation injection equipment). However, such equipment (e.g. converters for PV systems, BESS, EV charging stations...) have limited voltage reserve, leading to reduced perturbation injection capabilities (i.e. perturbation magnitude) with conventional perturbation signals (pseudo-random binary signals or chirp signals). To enhance the perturbation capabilities of those converters, an asymmetric signal is proposed that increases the perturbation magnitude at a maximum operating point. An extension to a wide-bandwidth chirp signal is then presented.

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Section: Introductionmentioning

confidence: 99%

An Asymmetric Perturbation Signal for Enhanced Perturbation Injection Capabilities of a Grid-connected Converter

Mace,

Cervone,

Dujic

2024

2024 IEEE Applied Power Electronics Conference and Exposition (APEC)

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“…[24] limited the selection range of the control parameters based on the relationship between frequency domain indicators and current control parameters, thereby optimizing the parameters of the current control loop. An adaptive PLL parameter design method was proposed to ensure sufficient phase angle margin by adjusting PLL parameters in real time [25]. However, the existing methods did not give the principle of control parameters selection according to the different stability margins of the system nor can quantify the stability level of the system.…”

Section: Introductionmentioning

confidence: 99%

A Quantitative Stability Evaluation Method of VSC for Optimizing Control Parameters and Extending Stability Boundary to Avoid Oscillations

Jiang¹,

Han

Sun

et al. 2023

Applied Sciences

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Oscillations caused by the interaction between voltage source converters (VSCs) and weak grids are vital threats to the stability of power systems. Determining the appropriate parameters for the control of VSCs is essential to prevent the occurrence of oscillations in advance. To achieve this goal, a quantitative evaluation method of system stability for VSCs is proposed in this article to specify the stability boundary of control parameters. Then, an active damping controller for current control and a parameter optimization method for the phase-locked loop (PLL) is proposed, and the related parameters are designed based on the guidance of the proposed evaluation method. With planting the parameters optimization in the control of VSC, the stability boundary of control parameters of VSC is extended, so that the stability of VSC can be significantly improved. Finally, simulations are presented to verify the effectiveness of the theoretical analysis.

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Adaptive Tuning of Phase-Locked Loop Parameters for Grid-Connected Inverters in Weak Grid Cases

Cited by 2 publications

References 15 publications

An Asymmetric Perturbation Signal for Enhanced Perturbation Injection Capabilities of a Grid-connected Converter

An Asymmetric Perturbation Signal for Enhanced Perturbation Injection Capabilities of a Grid-connected Converter

A Quantitative Stability Evaluation Method of VSC for Optimizing Control Parameters and Extending Stability Boundary to Avoid Oscillations

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