Frequency Adaptability of Harmonics Controllers for Grid-Interfaced Converters

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Abstract

A wider spread adoption of power electronic converters interfaced renewable energy systems has brought more attention to harmonic issues to the electrical grid, and means are taken to improve it in the control. More advanced closed-loop harmonic controllers are thus demanded to enhance the renewable energy integration in order to be grid-friendly. However, usually being treated as a constant factor in the design of harmonic controllers, the grid frequency varies with the generation-load imbalance, and thus may lead to deterioration of the power quality. This paper explores the frequency sensitivity of the most popular harmonic controllers for grid-interfaced converters. The frequency adaptability of these harmonic controllers is evaluated in the presence of a variable grid frequency within a specified reasonable range, e.g., +-1% of the nominal grid frequency (50 Hz). Solutions to the improvement of the frequency variation immunity of the discussed harmonic controllers are also emphasized. Case studies of a single-phase grid- connected photovoltaic system are provided to verify the analysis.
Original languageEnglish
JournalInternational Journal of Control
Volume90
Issue number1
Pages (from-to)3-14
Number of pages12
ISSN0020-7179
DOIs
Publication statusPublished - Apr 2017

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Controllers
Power quality
Power electronics
Deterioration

Keywords

  • Renewable energy
  • Power electronics
  • Grid converters
  • Pulse width modulation (PWM)
  • Harmonics
  • Frequency variation
  • Current controller
  • Harmonic controller

Cite this

@article{34b7434eb7b240df829dbcac332c6977,
title = "Frequency Adaptability of Harmonics Controllers for Grid-Interfaced Converters",
abstract = "A wider spread adoption of power electronic converters interfaced renewable energy systems has brought more attention to harmonic issues to the electrical grid, and means are taken to improve it in the control. More advanced closed-loop harmonic controllers are thus demanded to enhance the renewable energy integration in order to be grid-friendly. However, usually being treated as a constant factor in the design of harmonic controllers, the grid frequency varies with the generation-load imbalance, and thus may lead to deterioration of the power quality. This paper explores the frequency sensitivity of the most popular harmonic controllers for grid-interfaced converters. The frequency adaptability of these harmonic controllers is evaluated in the presence of a variable grid frequency within a specified reasonable range, e.g., +-1{\%} of the nominal grid frequency (50 Hz). Solutions to the improvement of the frequency variation immunity of the discussed harmonic controllers are also emphasized. Case studies of a single-phase grid- connected photovoltaic system are provided to verify the analysis.",
keywords = "Renewable energy, Power electronics, Grid converters, Pulse width modulation (PWM), Harmonics, Frequency variation, Current controller, Harmonic controller",
author = "Yongheng Yang and Keliang Zhou and Frede Blaabjerg",
year = "2017",
month = "4",
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language = "English",
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pages = "3--14",
journal = "International Journal of Control",
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Frequency Adaptability of Harmonics Controllers for Grid-Interfaced Converters. / Yang, Yongheng; Zhou, Keliang; Blaabjerg, Frede.

In: International Journal of Control, Vol. 90, No. 1, 04.2017, p. 3-14.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Frequency Adaptability of Harmonics Controllers for Grid-Interfaced Converters

AU - Yang, Yongheng

AU - Zhou, Keliang

AU - Blaabjerg, Frede

PY - 2017/4

Y1 - 2017/4

N2 - A wider spread adoption of power electronic converters interfaced renewable energy systems has brought more attention to harmonic issues to the electrical grid, and means are taken to improve it in the control. More advanced closed-loop harmonic controllers are thus demanded to enhance the renewable energy integration in order to be grid-friendly. However, usually being treated as a constant factor in the design of harmonic controllers, the grid frequency varies with the generation-load imbalance, and thus may lead to deterioration of the power quality. This paper explores the frequency sensitivity of the most popular harmonic controllers for grid-interfaced converters. The frequency adaptability of these harmonic controllers is evaluated in the presence of a variable grid frequency within a specified reasonable range, e.g., +-1% of the nominal grid frequency (50 Hz). Solutions to the improvement of the frequency variation immunity of the discussed harmonic controllers are also emphasized. Case studies of a single-phase grid- connected photovoltaic system are provided to verify the analysis.

AB - A wider spread adoption of power electronic converters interfaced renewable energy systems has brought more attention to harmonic issues to the electrical grid, and means are taken to improve it in the control. More advanced closed-loop harmonic controllers are thus demanded to enhance the renewable energy integration in order to be grid-friendly. However, usually being treated as a constant factor in the design of harmonic controllers, the grid frequency varies with the generation-load imbalance, and thus may lead to deterioration of the power quality. This paper explores the frequency sensitivity of the most popular harmonic controllers for grid-interfaced converters. The frequency adaptability of these harmonic controllers is evaluated in the presence of a variable grid frequency within a specified reasonable range, e.g., +-1% of the nominal grid frequency (50 Hz). Solutions to the improvement of the frequency variation immunity of the discussed harmonic controllers are also emphasized. Case studies of a single-phase grid- connected photovoltaic system are provided to verify the analysis.

KW - Renewable energy

KW - Power electronics

KW - Grid converters

KW - Pulse width modulation (PWM)

KW - Harmonics

KW - Frequency variation

KW - Current controller

KW - Harmonic controller

U2 - 10.1080/00207179.2015.1022957

DO - 10.1080/00207179.2015.1022957

M3 - Journal article

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SP - 3

EP - 14

JO - International Journal of Control

JF - International Journal of Control

SN - 0020-7179

IS - 1

ER -