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地磁感应电流(GIC)可能对各种人工长距离导电体造成影响与危害.地磁扰动产生的感应电场的强度与地磁场强度、地下电阻率结构相关,在导电系统内生成的GIC的强度则同时与导电系统的内在结构有关.计算了加拿大Manitoba省三个典型地区在2000年7月15日的一个强烈磁暴期间产生的感应电场.通过对地磁活动性的统计分析,估计加拿大魁北克电网可能经受的最大GIC达每相78A(一年一次)和234A(每十年一次).
The geomagnetic induced current (GIC) may affect and damage all kinds of artificial long-distance electrical conductors.The intensity of induced electric field generated by geomagnetic disturbance is related to the strength of geomagnetic field and the structure of underground resistivity, while the intensity of GIC generated in the conductive system is Is related to the internal structure of the conductive system.The induced electric field generated during a strong magnetic storms in three typical areas of Manitoba, Canada, on July 15, 2000, was calculated.Through the statistical analysis of geomagnetic activity, it is estimated that the power grid in Quebec, Canada may be subjected to Maximum GIC up to 78A per phase (once a year) and 234A (every ten years).