Offshore wind farm harmonic resonance analysis, part I: Converter harmonic model

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

Offshore wind power technology has matured significantly and now directly competes with conventional and onshore wind power generation. Thanks to continuous technological developments and significant cost reduction, offshore wind power is closing the gap with the onshore wind power about the levelized cost of electricity; however the technology challenges in the offshore environment still poses threats to the long-term operational reliability and profitability of offshore wind farm projects. This article focuses on one such threat: harmonic resonance in the offshore grid and presents an analytical solution to identify and mitigate it by applying advanced harmonic modelling of an offshore wind turbine. The analytical derivation of the frequency dependent positive and negative sequence impedance of a converter harmonic model of a 8MW generic wind turbine is presented. It concludes by comparing the frequency domain converter harmonic model of a generic 8MW offshore wind turbine with its time domain counterpart as well as the ideal current source model (conventional solution) under the distorted grid condition. The results obtained confirm that the converter harmonic model demonstrates superior accuracy when compared to the ideal current source model (conventional solution) for low order harmonics resonance interaction assessment. To conclude, the discrepancies in the results obtained from the time domain and the frequency domain models respectively deserves further investigation. Particularly the frequency dependent impedance as derived from the average model of the associated power electronics should be examined in detail as its validity depends strongly on the phenomena one is interested in (typically the average model provides sufficient accuracy when the frequency of interest under investigation is ten times smaller than the switching frequency).

Original languageEnglish
Title of host publication2017 IEEE Manchester PowerTech, Powertech 2017
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Number of pages6
DOIs
Publication statusPublished - 13 Jul 2017
Event12th IEEE PES PowerTech Conference - University of Manchester, Manchester, United Kingdom
Duration: 18 Jun 201722 Jun 2017
Conference number: 12
http://ieee-powertech.org/

Conference

Conference12th IEEE PES PowerTech Conference
Abbreviated titlePowerTech 2017
CountryUnited Kingdom
CityManchester
Period18/06/1722/06/17
OtherTowards and Beyond Sustainable Energy Systems
Internet address

Fingerprint

Offshore wind farms
Converter
Harmonic
Wind Power
Wind Turbine
Wind power
Offshore wind turbines
Impedance
Frequency Domain
Time Domain
Model
Grid
Power Electronics
Domain Model
Dependent
Profitability
Costs
Electricity
Switching frequency
Cost reduction

Keywords

  • frequency dependent
  • frequency domain
  • harmonic resonance
  • Norton equivalent
  • off shore wind power

Cite this

Sun, Y., De Jong, E., Cobben, J. F. G., & Cuk, V. (2017). Offshore wind farm harmonic resonance analysis, part I: Converter harmonic model. In 2017 IEEE Manchester PowerTech, Powertech 2017 [7980931] Piscataway: Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/PTC.2017.7980931
Sun, Yin ; De Jong, Erik ; Cobben, J. F.G. ; Cuk, Vladimir. / Offshore wind farm harmonic resonance analysis, part I : Converter harmonic model. 2017 IEEE Manchester PowerTech, Powertech 2017. Piscataway : Institute of Electrical and Electronics Engineers, 2017.
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abstract = "Offshore wind power technology has matured significantly and now directly competes with conventional and onshore wind power generation. Thanks to continuous technological developments and significant cost reduction, offshore wind power is closing the gap with the onshore wind power about the levelized cost of electricity; however the technology challenges in the offshore environment still poses threats to the long-term operational reliability and profitability of offshore wind farm projects. This article focuses on one such threat: harmonic resonance in the offshore grid and presents an analytical solution to identify and mitigate it by applying advanced harmonic modelling of an offshore wind turbine. The analytical derivation of the frequency dependent positive and negative sequence impedance of a converter harmonic model of a 8MW generic wind turbine is presented. It concludes by comparing the frequency domain converter harmonic model of a generic 8MW offshore wind turbine with its time domain counterpart as well as the ideal current source model (conventional solution) under the distorted grid condition. The results obtained confirm that the converter harmonic model demonstrates superior accuracy when compared to the ideal current source model (conventional solution) for low order harmonics resonance interaction assessment. To conclude, the discrepancies in the results obtained from the time domain and the frequency domain models respectively deserves further investigation. Particularly the frequency dependent impedance as derived from the average model of the associated power electronics should be examined in detail as its validity depends strongly on the phenomena one is interested in (typically the average model provides sufficient accuracy when the frequency of interest under investigation is ten times smaller than the switching frequency).",
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Sun, Y, De Jong, E, Cobben, JFG & Cuk, V 2017, Offshore wind farm harmonic resonance analysis, part I: Converter harmonic model. in 2017 IEEE Manchester PowerTech, Powertech 2017., 7980931, Institute of Electrical and Electronics Engineers, Piscataway, 12th IEEE PES PowerTech Conference, Manchester, United Kingdom, 18/06/17. https://doi.org/10.1109/PTC.2017.7980931

Offshore wind farm harmonic resonance analysis, part I : Converter harmonic model. / Sun, Yin; De Jong, Erik; Cobben, J. F.G.; Cuk, Vladimir.

2017 IEEE Manchester PowerTech, Powertech 2017. Piscataway : Institute of Electrical and Electronics Engineers, 2017. 7980931.

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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AB - Offshore wind power technology has matured significantly and now directly competes with conventional and onshore wind power generation. Thanks to continuous technological developments and significant cost reduction, offshore wind power is closing the gap with the onshore wind power about the levelized cost of electricity; however the technology challenges in the offshore environment still poses threats to the long-term operational reliability and profitability of offshore wind farm projects. This article focuses on one such threat: harmonic resonance in the offshore grid and presents an analytical solution to identify and mitigate it by applying advanced harmonic modelling of an offshore wind turbine. The analytical derivation of the frequency dependent positive and negative sequence impedance of a converter harmonic model of a 8MW generic wind turbine is presented. It concludes by comparing the frequency domain converter harmonic model of a generic 8MW offshore wind turbine with its time domain counterpart as well as the ideal current source model (conventional solution) under the distorted grid condition. The results obtained confirm that the converter harmonic model demonstrates superior accuracy when compared to the ideal current source model (conventional solution) for low order harmonics resonance interaction assessment. To conclude, the discrepancies in the results obtained from the time domain and the frequency domain models respectively deserves further investigation. Particularly the frequency dependent impedance as derived from the average model of the associated power electronics should be examined in detail as its validity depends strongly on the phenomena one is interested in (typically the average model provides sufficient accuracy when the frequency of interest under investigation is ten times smaller than the switching frequency).

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BT - 2017 IEEE Manchester PowerTech, Powertech 2017

PB - Institute of Electrical and Electronics Engineers

CY - Piscataway

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Sun Y, De Jong E, Cobben JFG, Cuk V. Offshore wind farm harmonic resonance analysis, part I: Converter harmonic model. In 2017 IEEE Manchester PowerTech, Powertech 2017. Piscataway: Institute of Electrical and Electronics Engineers. 2017. 7980931 https://doi.org/10.1109/PTC.2017.7980931