750 kV微损耗经济型故障限流器工频短路电磁环境  

Electromagnetic Environment of 750 kV Economical Fault Current Limiter Under Power Frequency Short-circuit

作　　者：侯东洋 刘敬华 刘川燕 邹军[1] HOU Dongyang;LIU Jinghua;LIU Chuanyan;ZOU Jun(State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment,Department of Electrical Engineering,Tsinghua University,Beijing 100084,China;State Grid Corporation of China,Beijing 100031,China;China Power Construction Engineering Consulting Central Southern Co.,Ltd.,Wuhan 430071,China)

机构地区：[1]清华大学电机工程与应用电子技术系电力系统及发电设备控制和仿真国家重点实验室,北京100084 [2]国家电网有限公司,北京100031 [3]中国电力建设工程咨询中南有限公司,武汉430071

出　　处：《高电压技术》2022年第11期4638-4646,共9页High Voltage Engineering

基　　金：国家自然科学基金(520771111)。

摘　　要：在工频短路故障时,故障限流器的投入使用会产生短时强电磁环境,威胁二次系统的安全、稳定运行。为此,建立了限流器3维有限元仿真模型,在模拟计算中采用区域分解法,然后利用MATLAB和COMSOL联合仿真平台,计算了工频短路时限流器的电磁环境。计算结果表明,相对于传统方式,区域分解法可以满足计算精度的要求,同时提高有限元计算的效率。工频短路时,限流器周围磁场关于x轴和y轴呈对称分布,在水平方向磁场曲线呈现“M”状分布。此外,随着高度的减小,磁场极大值的位置逐渐向两侧移动。最后,在限流器下方加装导电铝板来保护弱电设备,结果表明该方法具有较好的磁场防护效果。In case of power frequency short-circuit fault,the operation of fault current limiter will produce short-term strong electromagnetic environment,which will threaten the safe and stable operation of the secondary system.Therefore,a three-dimensional finite element simulation model of fault current limiter is established in this paper.The domain decomposition method is used in the simulation,and then the electromagnetic environment of power frequency short-circuit is calculated by using the joint simulation platform of MATLAB and COMSOL.From the calculation results,compared with the traditional method,the domain decomposition method can meet the requirements of calculation accuracy and improve the efficiency of finite element calculation.In case of power frequency short circuit,the distribution of magnetic field is in x-axially and y-axially symmetrical distribution,and in horizontally“M”distribution.With the decrease of the height,the position of the maximum gradually moves to both sides.A magnetic field protection method with aluminum plate is proposed,and it has good magnetic field protection effect.

关 键 词：故障限流器 工频短路 有限元法 电磁环境 电磁防护 区域分解法 

分 类 号：TM471[电气工程—电器]