摘要
为研究地磁暴产生的地磁感应电流(GIC)对变压器励磁特性的影响,以中国安徽地区的蒙城观测台所测得地磁波动数据和皖南地区大地土壤电阻率参数为基础,建立该地区交流网架模型,基于平面波法计算得到地磁暴期间地磁场和地磁感应电流(GIC)分布,并通过变压器UMEC模型,分析GIC对所分析地区变压器励磁特性的影响,利用CDEGS实现地磁场、电力系统网架与GIC侵害变压器的联合仿真,进一步确定地磁暴期间GIC计算与风险评估。结果表明:受强太阳风暴的影响,地磁暴对所分析地区交流电网造成强烈冲击影响,其电网中所感应到的GIC要比直流输电的影响大得多,同时造成变压器励磁电流的峰值增大。文中所提方法能够为电力系统中GIC的计算与其对变压器偏磁特性的影响提供参考。
In order to study the effect of geomagnetic induction current(GIC) generated by geomagnetic storms on excitation characteristics of transformer,taking magnetic wave data measured by Mengcheng observatory in China Anhui area and the earth soil resistivity parameter in the south of Anhui area as the foundation,the area communication network frame model is established.The distribution of earth magnetic field and magnetic induction current during geomagnetic storms(GIC) is obtained based on the calculation of plane wave method.The analysis of GIC on the transformer excitation characteristics of analyzed area is conducted by UMEC transformer model.The joint simulation of geomagnetic field,power system infrastructure and GIC intrusion transformer is realized by using CDEGS,and GIC calculations and risk assessments during geomagnetic storms are further determined.The results show that,under the influence of strong solar storms,geomagnetic storms have a strong impact on the AC power grid in the analyzed area,GIC induced in the grid is much more influential than the DC power transmission,and the peak value of transformer excitation current increases.The proposed method can provide reference for GIC calculation in power system and its influence on the magnetic bias characteristics of transformer.
作者
姜朋亮
赵文彬
卢武
沈浩
吴兴旺
Jiang Pengliang;Zhao Wenbin;Lu Wu;Shen Hao;Wu Xingwang(School of Electrical Engineering,Shanghai University of Electric Power,Shanghai 200090,China;State Grid Anqing Power Supply Company,Anqing 246000,Anhui,China;Electric Power Research Institute of Anhui Electric Power Co.,Ltd.,Hefei 230031,China)
出处
《电测与仪表》
北大核心
2021年第2期25-33,共9页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51707113)。
关键词
地磁暴
地磁感应电流
变压器
励磁特性
CDEGS
geomagnetic storm
geomagnetic induction current
transformer
excitation characteristic
CDEGS
