Geomagnetically induced currents (GICs) in a quasi-meridional power transmission line on the Kola Peninsula are analyzed during the intervals of Pc5/Pi3 (frequency range from 1.5 to 5 mHz) pulsations recorded at the IMAGE magnetometer network. We have analyzed GIC in a transformer at the terminal station Vykhodnoy (\(68^{\circ }\) N, \(33^{\circ }\) E) during the entire year of 2015, near the maximum of the 24th Solar cycle. To quantify the efficiency of GIC generation by geomagnetic pulsations, a ratio between power spectral densities of GIC and magnetic field variations is introduced. Upon examination of the geomagnetic pulsation efficiency in GIC generation, the emphasis is given to its dependence on frequency and spatial scale. To estimate pulsation spatial scales in latitudinal and longitudinal directions, the triangle of stations KEV-SOD-KIL has been used. Large-scale pulsations (with a high spectral coherence, low phase difference, and similar amplitudes at latitudinally separated stations) are found to be more effective in GIC generation than small-scale pulsations. The GIC response also depends on the pulsation scale across the electric power line.

在IMAGE磁强计网络记录的Pc5 / Pi3（频率范围从1.5到5 mHz）脉动间隔期间，分析了可拉半岛准准输电线路中的地磁感应电流（GIC）。我们已经分析了终端站Vykhodnoy（\（68 ^ {\ circ} \）  N，\（33 ^ {\ circ} \）的变压器中的GIC E）在2015年全年，接近第24个太阳周期的最大值。为了量化由地磁脉动产生的GIC的效率，引入了GIC的功率谱密度与磁场变化之间的比率。在检查GIC产生中的地磁脉动效率时，重点在于其对频率和空间尺度的依赖。为了估计横向和纵向的脉动空间尺度，已经使用了站KEV-SOD-KIL的三角形。发现在GIC生成中，大型脉动（频谱相干性高，相位差低，并且在横向分开的站点处具有相似的幅度）比小型脉动更有效。GIC响应还取决于电源线上的脉动范围。