Geomagnetically induced currents in the Irish power network during geomagnetic storms
Geomagnetically induced currents in the Irish power network during geomagnetic storms
复制标题
DOI：
10.1002/2016sw001534
复制
发表时间：
2016-11
期刊：
影响因子：
--
通讯作者：
S. Blake;P. Gallagher;J. McCauley;A. Jones;C. Hogg;J. Campanyà;C. Beggan;A. Thomson;G. Kelly;David Bell
中科院分区：
文献类型：
--
作者：
S. Blake;P. Gallagher;J. McCauley;A. Jones;C. Hogg;J. Campanyà;C. Beggan;A. Thomson;G. Kelly;David Bell
地磁感应电流（Geomagnetically Induced Currents，GIC）是一种常见的地球空间天气灾害。它们发生在电力传输网络中，已知在高纬度和中纬度国家都有不利影响。在这里，我们研究了爱尔兰输电网络（地磁纬度54.7-58.5°N）在五个地磁风暴（2016年3月6-7日，2015年12月20-21日，2015年3月17-18日，2003年10月29-31日和1989年3月13-14日）期间的GIC。我们使用平面波方法模拟电场，并结合两个地电阻率模型，其中一个是来自大地电磁测量（大地电磁（MT）模型）。然后，我们计算GIC在220，275和400千伏输电网络。在所研究的最大风暴期间，峰值电场被计算为高达3.8 V km−1，使用我们的MT模型，相关的GIC高达23 A。使用我们的均匀电阻率模型，这些峰值分别为1.46 V km−1和25.8 A。我们发现，三个400和275千伏变电站是最有可能的位置，爱尔兰变压器经历大GIC。
Geomagnetically induced currents (GICs) are a well‐known terrestrial space weather hazard. They occur in power transmission networks and are known to have adverse effects in both high‐latitude and midlatitude countries. Here we study GICs in the Irish power transmission network (geomagnetic latitude 54.7–58.5°N) during five geomagnetic storms (6–7 March 2016, 20–21 December 2015, 17–18 March 2015, 29–31 October 2003, and 13–14 March 1989). We simulate electric fields using a plane wave method together with two ground resistivity models, one of which is derived from magnetotelluric measurements (magnetotelluric (MT) model). We then calculate GICs in the 220, 275, and 400 kV transmission network. During the largest of the storm periods studied, the peak electric field was calculated to be as large as 3.8 V km−1, with associated GICs of up to 23 A using our MT model. Using our homogenous resistivity model, those peak values were 1.46 V km−1 and 25.8 A. We find that three 400 and 275 kV substations are the most likely locations for the Irish transformers to experience large GICs.