Robust design of LCL-filters for active damping in grid converters

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Pena-Alzola, Rafael and Liserre, Marco and Blaabjerg, Frede and Yang, Yongheng; (2014) Robust design of LCL-filters for active damping in grid converters. In: Proceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society. IEEE, AUT, pp. 1248-1253. ISBN 9781479902248 (https://doi.org/10.1109/IECON.2013.6699311)

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Abstract

Grid converters require a simple inductor or an LCL-filter to limit the current ripples. The LCL-filter is nowadays the preferred solution as it allows lower inductance values. In order to solve the stability concerns, active damping is preferred to passive damping since it does not use dissipative elements. However, large variations in the grid inductance and resonances arising from parallel converters may still compromise the system stability. This calls for a robust design of LCL-filters with active damping. This paper proposes a design flow with little iteration for two well-known methods, namely lead-lag network and current capacitor feedback. The proposed formulas for the resonance frequency, grid and converter inductance ratio, and capacitance of the LCL-filter allow calculating all the LCL-filter parameters. An estimation for the achieved Total Harmonic Distortion (THD) of the grid current is also provided. Experimental results show very robust designs to the parameter variations.

  • Item type:Book Section
    ID code:70302
    Dates:
    Date
    Event
    6 January 2014
    Published
    10 November 2013
    Accepted
    Notes:© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting /republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Department:Faculty of Engineering > Electronic and Electrical Engineering
    Depositing user: Pure Administrator
    Date deposited:28 Oct 2019 10:08
    Last modified:14 Dec 2024 01:05
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/70302
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