Variation Rate Characteristics of Mid-to-low Latitude Area Geomagnetic Field During Geomagnetic Storms
WANG Zezhong1, YU Huabing1, PAN Chao1, YAN Lei2, ZHAO Lili2
1. Beijing Key Laboratory of High Voltage and Electromagnetic Compatibility, North China Electric Power University, Beijing 102206, China;2. Shanxi Shuozhou Power Supply Company, Shuozhou 036002, Shanxi Province, China
Abstract：The geomagnetic field changes acutely during geomagnetic storms. According to Faraday's law of the electromagnetic induction, the change of the geomagnetic field produces a geomagnetically induced current in the power grid, which directly damages the power equipment and threatens the safe operation of the power grid. The more dramatically geomagnetic field changes, the bigger geomagnetically induced current in the power grid becomes, and thus, the greater harm to the power grid. In this paper, based on the H and D components of the recent geomagnetic storm data measured by several mid-to-low latitude geomagnetic observatories, the variation law of the amplitude of north-south and east-west geomagnetic component change rate (dX/dt and dY/dt) pulses with geomagnetic latitude is analyzed when the geomagnetic field changes very severely. Finally, the possibilities of the power grid in different directions being affected by GIC with the change of latitude are discussed. The analysis results will contribute to the evaluation, the measurement and the control of GIC in the current and future power grids in China.
王泽忠;余华兵;潘超;闫磊;赵莉莉. 磁暴期间中低纬度地区地磁场变化率的规律[J]. , 2013, 31(28-29): 74-80.
WANG Zezhong;YU Huabing;PAN Chao;YAN Lei;ZHAO Lili. Variation Rate Characteristics of Mid-to-low Latitude Area Geomagnetic Field During Geomagnetic Storms. , 2013, 31(28-29): 74-80.