Impulsive disturbances of the geomagnetic field as a cause of induced currents of electric power lines
Impulsive disturbances of the geomagnetic field as a cause of induced currents of electric power lines
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DOI：
10.1051/swsc/2019015
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发表时间：
2019
影响因子：
3.3
通讯作者：
V. Belakhovsky;V. Pilipenko;M. Engebretson;Y. Sakharov;Vasily Selivanov
中科院分区：
文献类型：
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作者：
V. Belakhovsky;V. Pilipenko;M. Engebretson;Y. Sakharov;Vasily Selivanov
地磁感应电流（GIC）是社会对稳定电力供应的重大挑战。空间天气激活了近地环境中的全球电磁和等离子体过程，然而，GIC的最高风险与那些具有巨大能量产出的过程没有直接关系，而是与太弱但快速的过程有关。在这里，我们考虑几个典型的例子，这样的快速过程和他们的影响，在科拉半岛和卡累利阿输电线路：行星际冲击，移动对流涡旋，脉冲嵌入亚暴，和不规则的Pi 3脉动。地磁场的变化是使用来自IMAGE（国际极光地磁效应监测器）磁力计阵列的数据进行检查的。我们已经证实，在所考虑的脉冲事件的电离层电流波动在东西和南北方向，它们诱发GIC在纬度延伸的电力线。揭示磁暴和亚磁暴期间地磁快速变化的精细结构，不仅具有重要的实用意义，而且具有重要的基础科学意义。
Geomagnetically induced currents (GICs) represent a significant challenge for society on a stable electricity supply. Space weather activates global electromagnetic and plasma processes in the near-Earth environment, however, the highest risk of GICs is related not directly to those processes with enormous energy yield, but too much weaker, but fast, processes. Here we consider several typical examples of such fast processes and their impact on power transmission lines in the Kola Peninsula and in Karelia: interplanetary shocks; traveling convection vortices; impulses embedded in substorms; and irregular Pi3 pulsations. Geomagnetic field variability is examined using data from the IMAGE (International Monitor for Auroral Geomagnetic Effects) magnetometer array. We have confirmed that during the considered impulsive events the ionospheric currents fluctuate in both the East-West and North-South directions, and they do induce GIC in latitudinally extended electric power line. It is important to reveal the fine structure of fast geomagnetic variations during storms and substorms not only for a practical point of view but also for a fundamental scientific view.