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Modeling and Mitigation for High Frequency Switching Transients Due to Energization in Offshore Wind Farms

Author

Listed:
  • Yanli Xin

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Bo Liu

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Wenhu Tang

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China)

  • Qinghua Wu

    (School of Electric Power Engineering, South China University of Technology, Guangzhou 510640, China
    Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, UK)

Abstract

This paper presents a comprehensive investigation on high frequency (HF) switching transients due to energization of vacuum circuit breakers (VCBs) in offshore wind farms (OWFs). This research not only concerns the modeling of main components in collector grids of an OWF for transient analysis (including VCBs, wind turbine transformers (WTTs), submarine cables), but also compares the effectiveness between several mainstream switching overvoltage (SOV) protection methods and a new mitigation method called smart choke. In order to accurately reproduce such HF switching transients considering the current chopping, dielectric strength (DS) recovery capability and HF quenching capability of VCBs, three models are developed, i.e., a user–defined VCB model, a HF transformer terminal model and a three-core (TC) frequency dependent model of submarine cables, which are validated through simulations and compared with measurements. Based on the above models and a real OWF configuration, a simulation model is built and several typical switching transient cases are investigated to analyze the switching transient process and phenomena. Subsequently, according to the characteristics of overvoltages, appropriate parameters of SOV mitigation methods are determined to improve their effectiveness. Simulation results indicate that the user–defined VCB model can satisfactorily simulate prestrikes and the proposed component models display HF characteristics, which are consistent with onsite measurement behaviors. Moreover, the employed protection methods can suppress induced SOVs, which have a steep front, a high oscillation frequency and a high amplitude, among which the smart choke presents a preferable HF damping effect.

Suggested Citation

  • Yanli Xin & Bo Liu & Wenhu Tang & Qinghua Wu, 2016. "Modeling and Mitigation for High Frequency Switching Transients Due to Energization in Offshore Wind Farms," Energies, MDPI, vol. 9(12), pages 1-16, December.
    • Handle: RePEc:gam:jeners:v:9:y:2016:i:12:p:1044-:d:84998
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    References listed on IDEAS

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    1. Jakob Glasdam & Claus Leth Bak & Jesper Hjerrild, 2012. "Transient Studies in Large Offshore Wind Farms Employing Detailed Circuit Breaker Representation," Energies, MDPI, vol. 5(7), pages 1-18, July.
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    Cited by:

    1. Marek Florkowski & Jakub Furgał & Maciej Kuniewski & Piotr Pająk, 2020. "Overvoltage Impact on Internal Insulation Systems of Transformers in Electrical Networks with Vacuum Circuit Breakers," Energies, MDPI, vol. 13(23), pages 1-14, December.
    2. Gang Liu & Yaxun Guo & Yanli Xin & Lei You & Xiaofeng Jiang & Ming Zheng & Wenhu Tang, 2018. "Analysis of Switching Transients during Energization in Large Offshore Wind Farms," Energies, MDPI, vol. 11(2), pages 1-13, February.
    3. Daniela Pagnani & Frede Blaabjerg & Claus Leth Bak & Filipe Miguel Faria da Silva & Łukasz H. Kocewiak & Jesper Hjerrild, 2020. "Offshore Wind Farm Black Start Service Integration: Review and Outlook of Ongoing Research," Energies, MDPI, vol. 13(23), pages 1-24, November.

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