LCL-filter design for robust active damping in grid-connected converters

Rafael Peña-Alzola, Marco Liserre, Frede Blaabjerg, Martin Ordonez, Yongheng Yang

Research output: Contribution to journalArticle

103 Citations (Scopus)

Abstract

Grid-connected converters employ LCL-filters, instead of simple inductors, because they allow lower inductances while reducing cost and size. Active damping, without dissipative elements, is preferred to passive damping for solving the associated stability problems. However, large variations in the grid inductance may compromise system stability, and this problem is more severe for parallel converters. This situation, typical of rural areas with solar and wind resources, calls for robust LCL-filter design. This paper proposes a design procedure with remarkable results under severe grid inductance variation. The procedure considers active damping using lead-lag network and capacitor current feedback. Passive damping is also discussed. The design flow, with little iteration and no complex algorithms, selects the proper ratios between the switching and resonance frequency, the grid and converter inductance, and the filter capacitance and total inductance. An estimation for the grid current total harmonic distortion (THD) is also proposed. Simulation and experiments validate the proposals.

LanguageEnglish
Pages2192-2203
Number of pages12
JournalIEEE Transactions on Industrial Informatics
Volume10
Issue number4
Early online date7 Oct 2014
DOIs
Publication statusPublished - 1 Nov 2014

Fingerprint

Inductance
Damping
Harmonic distortion
System stability
Capacitors
Capacitance
Lead
Feedback
Costs
Experiments

Keywords

  • active damping
  • grid connected converter
  • LCL-filter
  • robust design
  • stability
  • weak grid

Cite this

Peña-Alzola, Rafael ; Liserre, Marco ; Blaabjerg, Frede ; Ordonez, Martin ; Yang, Yongheng. / LCL-filter design for robust active damping in grid-connected converters. In: IEEE Transactions on Industrial Informatics. 2014 ; Vol. 10, No. 4. pp. 2192-2203.
@article{307825c9f61a4056a89a9ca89d90e2a9,
title = "LCL-filter design for robust active damping in grid-connected converters",
abstract = "Grid-connected converters employ LCL-filters, instead of simple inductors, because they allow lower inductances while reducing cost and size. Active damping, without dissipative elements, is preferred to passive damping for solving the associated stability problems. However, large variations in the grid inductance may compromise system stability, and this problem is more severe for parallel converters. This situation, typical of rural areas with solar and wind resources, calls for robust LCL-filter design. This paper proposes a design procedure with remarkable results under severe grid inductance variation. The procedure considers active damping using lead-lag network and capacitor current feedback. Passive damping is also discussed. The design flow, with little iteration and no complex algorithms, selects the proper ratios between the switching and resonance frequency, the grid and converter inductance, and the filter capacitance and total inductance. An estimation for the grid current total harmonic distortion (THD) is also proposed. Simulation and experiments validate the proposals.",
keywords = "active damping, grid connected converter, LCL-filter, robust design, stability, weak grid",
author = "Rafael Pe{\~n}a-Alzola and Marco Liserre and Frede Blaabjerg and Martin Ordonez and Yongheng Yang",
note = "{\circledC} 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.",
year = "2014",
month = "11",
day = "1",
doi = "10.1109/TII.2014.2361604",
language = "English",
volume = "10",
pages = "2192--2203",
journal = "IEEE Transactions on Industrial Informatics",
issn = "1551-3203",
number = "4",

}

LCL-filter design for robust active damping in grid-connected converters. / Peña-Alzola, Rafael; Liserre, Marco; Blaabjerg, Frede; Ordonez, Martin; Yang, Yongheng.

In: IEEE Transactions on Industrial Informatics, Vol. 10, No. 4, 01.11.2014, p. 2192-2203.

Research output: Contribution to journalArticle

TY - JOUR

T1 - LCL-filter design for robust active damping in grid-connected converters

AU - Peña-Alzola, Rafael

AU - Liserre, Marco

AU - Blaabjerg, Frede

AU - Ordonez, Martin

AU - Yang, Yongheng

N1 - © 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.

PY - 2014/11/1

Y1 - 2014/11/1

N2 - Grid-connected converters employ LCL-filters, instead of simple inductors, because they allow lower inductances while reducing cost and size. Active damping, without dissipative elements, is preferred to passive damping for solving the associated stability problems. However, large variations in the grid inductance may compromise system stability, and this problem is more severe for parallel converters. This situation, typical of rural areas with solar and wind resources, calls for robust LCL-filter design. This paper proposes a design procedure with remarkable results under severe grid inductance variation. The procedure considers active damping using lead-lag network and capacitor current feedback. Passive damping is also discussed. The design flow, with little iteration and no complex algorithms, selects the proper ratios between the switching and resonance frequency, the grid and converter inductance, and the filter capacitance and total inductance. An estimation for the grid current total harmonic distortion (THD) is also proposed. Simulation and experiments validate the proposals.

AB - Grid-connected converters employ LCL-filters, instead of simple inductors, because they allow lower inductances while reducing cost and size. Active damping, without dissipative elements, is preferred to passive damping for solving the associated stability problems. However, large variations in the grid inductance may compromise system stability, and this problem is more severe for parallel converters. This situation, typical of rural areas with solar and wind resources, calls for robust LCL-filter design. This paper proposes a design procedure with remarkable results under severe grid inductance variation. The procedure considers active damping using lead-lag network and capacitor current feedback. Passive damping is also discussed. The design flow, with little iteration and no complex algorithms, selects the proper ratios between the switching and resonance frequency, the grid and converter inductance, and the filter capacitance and total inductance. An estimation for the grid current total harmonic distortion (THD) is also proposed. Simulation and experiments validate the proposals.

KW - active damping

KW - grid connected converter

KW - LCL-filter

KW - robust design

KW - stability

KW - weak grid

UR - http://www.scopus.com/inward/record.url?scp=84910045326&partnerID=8YFLogxK

U2 - 10.1109/TII.2014.2361604

DO - 10.1109/TII.2014.2361604

M3 - Article

VL - 10

SP - 2192

EP - 2203

JO - IEEE Transactions on Industrial Informatics

T2 - IEEE Transactions on Industrial Informatics

JF - IEEE Transactions on Industrial Informatics

SN - 1551-3203

IS - 4

ER -