Analysis and Design of Robust LLCL-Type Filters for Grid-Tied Applications with Capacitor-Current Active Damping

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

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Abstrakt

LCL filters are adopted to attenuate the switching-frequency harmonics in grid-tied applications. To meet stringent grid requirements, higher order filters have further been proposed. LLCL, is an example, which can provide an additional trap at the switching sideband frequency, and thus, it can better attenuate switching-frequency harmonics. Unlike traditional high-order filters with resonance frequency below the Nyquist frequency, this paper place it of the LLCL above the Nyquist frequency with trap frequency set at the dominant harmonics. Then, with capacitor-current damping, new stability regions are explored and employed for robust design against the grid impedance variations. Simulations verify the analysis and design.
OriginalsprogEngelsk
TitelProceedings of the 2020 IEEE 9th International Power Electronics and Motion Control Conference (IPEMC2020-ECCE Asia)
Antal sider7
ForlagIEEE
Publikationsdatonov. 2020
Sider785-791
Artikelnummer9367919
ISBN (Elektronisk)978-1-7281-5301-8
DOI
StatusUdgivet - nov. 2020
Begivenhed9th IEEE International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia - Nanjing, Kina
Varighed: 29 nov. 20202 dec. 2020

Konference

Konference9th IEEE International Power Electronics and Motion Control Conference, IPEMC 2020 ECCE Asia
LandKina
ByNanjing
Periode29/11/202002/12/2020

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