捷克输电网地磁感应电流建模
Modelling of Geomagnetically Induced Currents in the Czech Transmission Grid
摘要：
我们调查的地磁感应电流（GIC）在捷克输电网络的最大预期幅度。我们计算一个模型，利用Lehtinen-Pirjola方法，考虑平面波模型的地电场，并使用传输网络参数好心提供的运营商。我们发现，在万圣节风暴事件期间的捷克输电网的节点预期的最大振幅约为15 A。对于具有1 V/km地电场的“极端风暴”条件，预期最大值不超过40 A。我们推测，最近证实的统计相关性增加的地磁活动和异常率在电网中可能是由于反复暴露的设备的低振幅GIC。
英文摘要：
We investigate the maximum expected magnitudes of the geomagnetically induced currents (GICs) in the Czech transmission power network. We compute a model utilising the Lehtinen-Pirjola method, considering the plane-wave model of the geoelectric field, and using the transmission network parameters kindly provided by the operator. We find that the maximum amplitudes expected in the nodes of the Czech transmission grid during the Halloween storm-like event are about 15 A. For the "extreme-storm" conditions with a 1-V/km geoelectric field, the expected maxima do not exceed 40 A. We speculate that the recently proven statistical correlation between the increased geomagnetic activity and anomaly rate in the power grid may be due to the repeated exposure of the devices to the low-amplitude GICs.
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