新西兰的地磁感应电流缓解:工业投入的操作缓解方法开发

IF 3.7 2区 地球科学
Space Weather Pub Date : 2023-11-27 DOI:10.1029/2023sw003533
D. H. Mac Manus, C. J. Rodger, A. Renton, J. Ronald, D. Harper, C. Taylor, M. Dalzell, T. Divett, M. A. Clilverd
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引用次数: 0

摘要

减少地磁感应电流(gic)对电网的影响是在风暴期间和之后保护电网资产和保持可靠电力传输的重要步骤。在本研究中,在最坏的极端风暴情景下测试了多种缓解策略,以调查其对新西兰输电网络的有效性。通过与我们的行业合作伙伴transwer新西兰有限公司直接合作,已经制定了一项以目标线路断开形式的缓解策略。事实证明,这一缓解战略比以前的战略更有效,既能减少对GIC风险最大的变压器的GIC震级和持续时间,又能保持整个新西兰的持续供电。在这一缓解计划下,30个最危险的变压器中有27个的60分钟平均GIC减少了,整个网络的GIC减少了16%。这一最新缓解措施已被新西兰国家控制室采纳为管理GIC的一项业务程序。此外,仿真结果表明,在特定变压器上安装14个电容阻断装置可使网络中的总GIC总额额外减少16%。由于这项研究的结果,transpwer正在考虑以电容器阻滞剂的形式进一步缓解这种情况。我们强烈建议与相关电网供应商合作,制定有效的缓解战略,减少GIC,并将对配电的影响降至最低。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Geomagnetically Induced Current Mitigation in New Zealand: Operational Mitigation Method Development With Industry Input
Reducing the impact of Geomagnetically induced currents (GICs) on electrical power networks is an essential step to protect network assets and maintain reliable power transmission during and after storm events. In this study, multiple mitigation strategies are tested during worst-case extreme storm scenarios in order to investigate their effectiveness for the New Zealand transmission network. By working directly with our industry partners, Transpower New Zealand Ltd, a mitigation strategy in the form of targeted line disconnections has been developed. This mitigation strategy proved more effective than previous strategies at reducing GIC magnitudes and durations at transformers at most risk to GIC while still maintaining the continuous supply of power throughout New Zealand. Under this mitigation plan, the average 60-min mean GIC decreased for 27 of the top 30 at-risk transformers, and the total network GIC was reduced by 16%. This updated mitigation has been adopted as an operational procedure in the New Zealand national control room to manage GIC. In addition, simulations show that the installation of 14 capacitor blocking devices at specific transformers reduces the total GIC sum in the network by an additional 16%. As a result of this study Transpower is considering further mitigation in the form of capacitor blockers. We strongly recommend collaborating with the relevant power network providers to develop effective mitigation strategies that reduce GIC and have a minimal impact on power distribution.
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