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Micro wind energy systems in harsh environments: Failure analysis of small wind turbines at remote sites in Labrador.

机译:恶劣环境中的微型风能系统:拉布拉多偏远地区的小型风力发电机的故障分析。

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摘要

The operational reliability of small-scale wind turbines in isolated, harsh environments is examined in this thesis. Bell-Aliant operates nearly 40 micro wind turbines (900 W) at hilltop telecommunication tower sites in Labrador, several of which have experienced catastrophic failure, due in part to the extreme meteorological conditions. Consequently, a technological challenge is presented. What are the external forces that caused these failures? Under what circumstances can failure be expected to recur? What, if any, flaws with the machinery may contribute to failure? How may the risk of failure be reduced? This work responds to these questions and in doing so demonstrates a systematic and analytical approach applicable to similar problems. A literature review discusses wind energy technology, applications and the challenges faced when operating in extreme climates. A statistical analysis of site-specific parameters suggests the best indicators of turbine failure potential at a given site were found to he wind speed and turbulence. A forensic mechanical and material analysis of the primary failure mechanism was conducted, highlighting flawed nacelle design. An experimental program whereby turbine response characteristics are analyzed with respect to machine alterations aimed at improving operational reliability showed simple blade modifications are not sufficient to mitigate the primary failure mechanism.
机译:本文研究了小型风力涡轮机在孤立,恶劣环境下的运行可靠性。 Bell-Aliant在拉布拉多的山顶电信塔站点运营着将近40台微型风力涡轮机(900瓦),其中部分由于极端的气象条件而遭受了灾难性的破坏。因此,提出了技术挑战。是什么导致这些故障的外力?在什么情况下可以预期失败会再次发生?机械的缺陷(如果有)会导致故障吗?如何降低失败的风险?这项工作回答了这些问题,并以此证明了适用于类似问题的系统和分析方法。文献综述讨论了风能技术,应用以及在极端气候下运行时面临的挑战。对特定地点参数的统计分析表明,在给定地点,发现风速和湍流的最佳涡轮机故障指标。对主要故障机理进行了取证机械和材料分析,突出了机舱设计的缺陷。一项针对汽轮机响应特性而针对机器变更进行分析的实验程序,旨在提高运行可靠性,结果表明,简单的叶片改造不足以缓解主要故障机理。

著录项

  • 作者

    Roberts, Jonas.;

  • 作者单位

    Memorial University of Newfoundland (Canada).;

  • 授予单位 Memorial University of Newfoundland (Canada).;
  • 学科 Alternative Energy.;Engineering Environmental.
  • 学位 M.Eng.
  • 年度 2009
  • 页码 167 p.
  • 总页数 167
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 普通生物学;
  • 关键词

  • 入库时间 2022-08-17 11:37:50

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