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<p>Wind energy conversion systems represent a significant renewable energy source, offering a viable alternative to finite fossil fuels. Among the grid-connected wind turbine generators, permanent magnet synchronous generators and doubly-fed induction generators are widely utilized. Given their prevalence, it becomes essential to explore their reliability and lifespan management to ensure the sustainability of power grids and provide industrial consumption. This research focuses on inspecting and evaluating wind turbine generators, specifically the PMSG and DFIG, within the context of wind energy conversion systems. Utilizing a 1.5&#xa0;MW grid-integrated wind turbine system, the study investigates the critical failure modes of these generators through lifetime analysis. Reliability criteria are carefully chosen to assess the reliability status of these generators under various faulty conditions. The findings from the reliability assessments are used to establish Markov chains, and reliability studies yield the mean time to failure as a parameter for estimating lifespan. Faulty conditions are categorized into converter-level faults and generator-level faults. Based on the simulation results, the PMSG fails under two fault conditions but demonstrates better performance than the DFIG in the case of a demagnetization fault. Initially, after the analysis is conducted, the PMSG exhibits higher reliability. However, over the long term, the DFIG surpasses it, achieving the highest reliability in a nine-year period. Ultimately, the study aims to recommend the most reliable generator for wind turbine systems, offering valuable insights for engineering applications.</p>

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Reliability and lifetime analysis on wind energy conversion systems: case study PMSG and DFIG

  • 期刊论文

  • 发表日期：

    2025年7月31日

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  • Navid Dehghan,
  • Ali Amini,
  • Mohammad Hossein Shaabani,
  • Seyed Hossein Hosseinian,
  • Behrooz Vahidi

摘要

Wind energy conversion systems represent a significant renewable energy source, offering a viable alternative to finite fossil fuels. Among the grid-connected wind turbine generators, permanent magnet synchronous generators and doubly-fed induction generators are widely utilized. Given their prevalence, it becomes essential to explore their reliability and lifespan management to ensure the sustainability of power grids and provide industrial consumption. This research focuses on inspecting and evaluating wind turbine generators, specifically the PMSG and DFIG, within the context of wind energy conversion systems. Utilizing a 1.5 MW grid-integrated wind turbine system, the study investigates the critical failure modes of these generators through lifetime analysis. Reliability criteria are carefully chosen to assess the reliability status of these generators under various faulty conditions. The findings from the reliability assessments are used to establish Markov chains, and reliability studies yield the mean time to failure as a parameter for estimating lifespan. Faulty conditions are categorized into converter-level faults and generator-level faults. Based on the simulation results, the PMSG fails under two fault conditions but demonstrates better performance than the DFIG in the case of a demagnetization fault. Initially, after the analysis is conducted, the PMSG exhibits higher reliability. However, over the long term, the DFIG surpasses it, achieving the highest reliability in a nine-year period. Ultimately, the study aims to recommend the most reliable generator for wind turbine systems, offering valuable insights for engineering applications.