Assessing the Impact of Weak and Moderate Geomagnetic Storms on UK Power Station Transformers
Assessing the Impact of Weak and Moderate Geomagnetic Storms on UK Power Station Transformers
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DOI：
10.1029/2021sw003021
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发表时间：
2022-04-01
影响因子：
3.7
通讯作者：
Walach, M-T
中科院分区：
文献类型：
--
作者：
Lewis, Z. M.;Wild, J. A.;Walach, M-T
有充分的证据表明，空间天气会影响电力基础设施，近几十年来已经观察到几起事件，这些事件与大型地磁暴直接相关（例如，1989年魁北克水电公司事件）。然而，从长远来看，人们对低水平地磁感应电流对变压器健康的影响了解较少。在这项研究中，地磁活动对13个发电站变压器在英国的长期影响进行了调查。2010年至2015年的溶解气体测量结果用于寻找Transformer退化与全球SYM-H指数和dBdt $\frac {d}B}{d}t}$升高之间存在联系的证据，这些数据是在苏格兰南部的Eskdalemuir磁力计站测量的。首先，使用溶解气体分析方法，特别是低能量退化三角形，对这一时期最重要的风暴进行了案例研究。这些案例研究，然后增加了统计调查，包括叠加时代分析的多个风暴事件。在这段时间内，没有发现系统性空间气象影响的证据，这可能是由于太阳在这一时期相对平静以及所研究的变压器的现代性。
It is well documented that space weather can impact electricity infrastructure, and several incidents have been observed in recent decades and directly linked to large geomagnetic storms (e.g., the Hydro Quebec incident in 1989). However, less is understood about the impact of lower-level geomagnetically induced currents on the health of transformers in the long term. In this study, the long term impact of geomagnetic activity on 13 power station transformers in the UK is investigated. Dissolved gas measurements from 2010 to 2015 were used to look for evidence of a link between degradation of the transformer and heightened levels of the global SYM-H index and dBdt $\frac{\mathrm{d}B}{\mathrm{d}t}$ as measured at Eskdalemuir magnetometer station in southern Scotland. First, case studies of the most significant storms in this time period were examined using dissolved gas analysis methods, specifically the Low Energy Degradation Triangle. These case studies were then augmented with a statistical survey, including Superposed Epoch Analysis of multiple storm events. No evidence of a systematic space weather impact can be found during this time period, likely owing to the relatively quiet nature of the Sun during this epoch and the modernity of the transformers studied.