A novel robust active damping control strategy based on H∞ loop shaping for the grid-tied LCL inverter

LCL-type grid-connected inverters have been widely used in renewable power generation due to their size and cost advantages. However, the LCL filter has a problem of insufficient damping, which may lead to power system instability. Two common methods are used to address this problem: passive damping (PD) and active damping (AD). PD methods suppress resonance by adding resistors to the LCL filter, but this approach increases system losses. AD methods enhance damping through control to suppress resonance. Existing AD methods are often significantly affected by grid-side inductance perturbation, resulting in insufficient robustness. To address this issue, this article proposes a novel robust active damping (RAD) control strategy based on H∞ loop shaping. Simulation analysis and experimental research show that the RAD control method exhibits superior robustness compared with the traditional capacitor current active damping control.

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Publication Details

Journal
Frontiers in Energy Research
Published
2024-10-18
DOI
https://doi.org/10.3389/fenrg.2024.1473060
Citations
2
Primary Topic
Microgrid Control and Optimization
Type
article
Field-Weighted Citation Impact
0.66

Funders

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article

A novel robust active damping control strategy based on H∞ loop shaping for the grid-tied LCL inverter

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A novel robust active damping control strategy based on H∞ loop shaping for the grid-tied LCL inverter

Gang Xu, Changli Shi, Tongzhen Wei, Ruiqi Min, Wenyong Guo, Zongjie Liu, Wenju Sang, Zeyin He, J.x. Shen, Yun Hong, Xiaoxu Li, Xue Han, Junzhi Li, Siyuan Song
article en
2 citations

Abstract

LCL-type grid-connected inverters have been widely used in renewable power generation due to their size and cost advantages. However, the LCL filter has a problem of insufficient damping, which may lead to power system instability. Two common methods are used to address this problem: passive damping (PD) and active damping (AD). PD methods suppress resonance by adding resistors to the LCL filter, but this approach increases system losses. AD methods enhance damping through control to suppress resonance. Existing AD methods are often significantly affected by grid-side inductance perturbation, resulting in insufficient robustness. To address this issue, this article proposes a novel robust active damping (RAD) control strategy based on H∞ loop shaping. Simulation analysis and experimental research show that the RAD control method exhibits superior robustness compared with the traditional capacitor current active damping control.

Frontiers in Energy ResearchVol. 12
Chinese Academy of Sciences (CN), Beijing Jiaotong University (CN), Shanghai Micro Satellite Engineering Center (CN), Institute of Electrical Engineering (CN), University of Chinese Academy of Sciences (CN)
Fundamental Research Funds for the Central Universities
Affordable and clean energy
Openalex Percentile: Top 29%
Microgrid Control and Optimization
0.66
DOIOpen Access PDFOpenAlex
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