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

Rafael Pena-Alzola, Marco Liserre, Frede Blaabjerg, Yongheng Yang

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

9 Citations (Scopus)
5 Downloads (Pure)

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.

Original languageEnglish
Title of host publicationProceedings, IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society
Place of PublicationPiscataway, N.J.
PublisherIEEE
Pages1248-1253
Number of pages6
ISBN (Print)9781479902248
DOIs
Publication statusPublished - 6 Jan 2014
Event39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013 - Vienna, Austria
Duration: 10 Nov 201314 Nov 2013

Conference

Conference39th Annual Conference of the IEEE Industrial Electronics Society, IECON 2013
CountryAustria
CityVienna
Period10/11/1314/11/13

    Fingerprint

Keywords

  • LCL filters
  • active damping
  • grid converters

Cite this

Pena-Alzola, R., Liserre, M., Blaabjerg, F., & Yang, Y. (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 (pp. 1248-1253). [6699311] Piscataway, N.J.: IEEE. https://doi.org/10.1109/IECON.2013.6699311