不同材料对变电站内三相空心电抗器磁场干扰的屏蔽效果研究  

Research for magnetic shielding effect of 3-phase air core reactor in substation by using different materials

作　　者：汪先进 周凯[1] 赵世林 陈玉豪 陈诗佳 黄永禄 WANG Xianjin;ZHOU Kai;ZHAO Shilin;CHEN Yuhao;CHEN Shijia;HUANG Yonglu(School of Electrical Engineering and Information,Sichuan University,Chengdu 610065,China;Wanzhou Power Supply Branch,State Grid Chongqing Electric Power Company,Chongqing 404100,China;Skills training center,State Grid Sichuan Electric Power Co.,Ltd.,Chengdu 610072,China)

机构地区：[1]四川大学电气信息学院,四川成都610065 [2]国网重庆市电力公司万州供电分公司,重庆404100 [3]国网四川省电力公司技能培训中心,四川成都610072

出　　处：《电力科学与技术学报》2021年第4期150-156,共7页Journal of Electric Power Science And Technology

基　　金：中国博士后科学基金(2015T80976)。

摘　　要：为研究变电站现场三相空心电抗器对附近线路的磁场干扰及不同材料的屏蔽特性,在建立三维电磁场仿真模型基础上,研究高电导率材料与高磁导率材料对空间磁场的变化情况,并阐明其变化原因。同时利用有限元仿真结果中的矢量磁位对电抗器附近线路的感应电压进行计算,对不同屏蔽材料下的电压抑制效果进行讨论。结果表明:采用高磁导率材料屏蔽时需要将三相屏蔽体连通才能取得良好的屏蔽效果,同时高磁导率材料边缘大量磁力线的穿出可能造成附近区域线路的干扰增强。因此,采用高磁导率三相连通屏蔽还需要考虑变电站现场线路的分布情况。In order to research the magnetic field interference on cables nearby 3-phase air core reactor and the shielding effect of different materials,this paper analyses the influence of high conductivity materials and high permeability materials on spatial magnetic field on the basis of 3D electromagnetic field simulation model.Then the influence mechanisms are expounded.Furthermore,the induced voltages in different shielding measures are calculated and discussed basing on magnetic vector potential obtained from the finite element simulation results.The results show that,for the shielding of high permeability materials,good shielding effect can be achieved only by connecting 3 phases shield together.Moreover,a large number of magnetic leakages on the edge of shield may aggravate the magnetic field interference in surrounding areas.Therefore,the distribution of onsite cables in substation needs to be considered when applying high permeability 3-phase connection shielding.

关 键 词：磁场干扰 空心电抗器 屏蔽方法 有限元法 

分 类 号：TM472[电气工程—电器]