7Albertson V D, Thorson J M, Miske S A, et al. The effects of geomagnetic storms on electric power system [J]. IEEE Trans. Power Appar. & Syst., 1974, PAS-93 (4):1031-1044.
8Albertson V D, Thorson J M, Clayton R E et al. Solar induced currents in power system: cause and effects[J]. IEEE Trans. Power Appar. & Syst., 1973, PAS-92(2): 471-477.
9Kappenman J G. Albertson for the geomagnetic storms [J]. IEEE Spect. Magaz., 1990,27(3):27-33.
10Walling R A, Khan A H. Characteristics of transformer exciting-current during geomagnetic disturbance[J]. IEEE Trans. Power Deliv., 1991,6(4):1707-1714.