Digital Low-Pass-Filter-Based Single-Loop Damping for LCL-Filtered Grid-Tied Inverters

Pei Cai, Xiaohua Wu, Yongheng Yang, Wenli Yao, Frede Blaabjerg

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2 Citationer (Scopus)

Abstrakt

Damping the LCL-filter resonance is an essential issue for grid-connected inverters. In most of the prior-art solutions, active damping focuses on a dual-loop architecture, e.g., using the capacitor-current to damp the resonance, thus complicating the entire control loop and/or increasing the cost. Digital filters (such as notch and all-pass filters) directly cascaded into the current controller, referred to as a single-loop scheme, are thus more economical, which feature no extra sensors and a simple open-loop scheme with easy parameter tuning. This paper proposes a practical single-loop damping method for grid-current feedback control (GCF) based on a first-order digital low-pass filter, which realizes damping by lagging the phase and meanwhile reducing the magnitude response for a sufficient gain margin. Simulations verify the proposed method.
OriginalsprogEngelsk
TitelProceedings of IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society
Antal sider6
ForlagIEEE Press
Publikationsdatookt. 2018
Sider6122-6127
ISBN (Trykt)978-1-5090-6685-8
ISBN (Elektronisk) 978-1-5090-6684-1
DOI
StatusUdgivet - okt. 2018
Begivenhed44th Annual Conference of the IEEE Industrial Electronics Society - Omni Shoreham Hotel, Washington, USA
Varighed: 21 okt. 201823 okt. 2018
http://www.iecon2018.org/

Konference

Konference44th Annual Conference of the IEEE Industrial Electronics Society
LokationOmni Shoreham Hotel
LandUSA
ByWashington
Periode21/10/201823/10/2018
Internetadresse

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Citationsformater

Cai, P., Wu, X., Yang, Y., Yao, W., & Blaabjerg, F. (2018). Digital Low-Pass-Filter-Based Single-Loop Damping for LCL-Filtered Grid-Tied Inverters. I Proceedings of IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society (s. 6122-6127). IEEE Press. https://doi.org/10.1109/IECON.2018.8591089