一种强电磁设备低频辐射特性等效建模方法  

Aequivalent Modeling Method for Low-Frequency Radiation Characteristics of High-Power Electromagnetic Equipment

作　　者：陈豪 刘其凤 李永明[1] 黄琛[2] 张淮清[1] Chen Hao;Liu Qifeng;Li Yongming;Huang Chen;Zhang Huaiqing(State Key Laboratory of Power Transmission Equipment&System Security and New Technology Chongqing University,Chongqing 400044 China;Key Laboratory of electromagnetic compatibility China Ship Development and Design Center,Wuhan 430064 China)

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044 [2]中国舰船研究设计中心电磁兼容性重点实验室,武汉430064

出　　处：《电工技术学报》2023年第20期5354-5368,共15页Transactions of China Electrotechnical Society

基　　金：射频系统强电磁脉冲环境效应预测与防护技术研究(cstc2021ycjh-bgzxm0330);随机电磁环境中汽车线缆网络电磁干扰特性的高效预测方法研究(cstc2020jcyj-msxmX0825,2020CDJ-LHZZ-078)资助项目。

摘　　要：随着高开关频率的新型电力电子器件广泛应用到舰船等平台上的强电磁设备中,强电磁设备产生的低频辐射会对平台上的敏感设备产生严重的影响,因此必须对强电磁设备的低频辐射特性进行准确建模表征,支撑开展强电磁设备低频场分布特征的量化预测,以便提升整个平台的电磁兼容性能。传统等效偶极子法在对大尺寸辐射源进行等效建模时,存在偶极子阵列所需的等效偶极子源数量多,高度、位置选择困难等问题。为解决上述问题,该文提出一种基于自适应差分进化算法的强电磁设备低频辐射特性等效偶极子建模的方法。该方法从强电磁设备附近的近场辐射特性测试数据出发,将强电磁设备低频辐射等效为分布在多个区域的偶极子阵列组合的分布式辐射源,并通过自适应差分进化算法优化各区域偶极子阵列的数量、位置以及高度等等效源参数,并通过试验和算例验证该方法可在满足一定精度条件下,能大幅度减小偶极子数量,得到强电磁设备最优的低频分布式等效源模型。As new power electronics with high switching frequencies are widely used in high-power,high-current,and large-volume electrical equipment on aircraft,ships,and other platforms,the low-frequency radiation generated by high-power electromagnetic equipment seriously impactssensitive equipment.Therefore,it is important to accurately model and characterize the low-frequency radiation characteristics of the equipment and support the predictions of its low-frequency field distribution characteristics to improve the entire platform's electromagnetic compatibility.When the traditional equivalent dipole method is used for equivalent modeling of the radiation characteristics of the large radiation sources,the required dipole array contains many equivalent dipole sources,and choosing the array height and dipole positionis challenging.Therefore,this paper proposes an equivalent dipole method based on the adaptive differential evolution algorithm for the low-frequency radiation characteristics of high-power electromagnetic equipment.Firstly,to reduce the number of dipoles in the array,the low-frequency radiation of the high-power electromagnetic equipment is equivalent to the distributed radiation source equivalent model of dipole arrays distributed in multiple regions according to the near-field test data.Secondly,the adaptive differential evolution with an optional external archive(JADE)is introduced to optimize the equivalent modeling of the low-frequency radiation characteristics to obtain the number,position,and height of dipole arrays that meet the requirements of high-precision equivalent modeling.Finally,to solve the ill-conditioned matrix in each iteration of the equivalent dipole method based on JADE,the least squares method,and Tikhonov regularization are used to solve the ill-conditioned matrix.The generalized cross-validation method(GCV)solves the corresponding Tikhonov regularization parameters of the matrix equation to obtain the stable solution of the equation.The distributed radiation source equivalent model o

关 键 词：低频辐射干扰 等效源法 三维磁偶极子阵列 自适应差分进化算法 近场数据 

分 类 号：TM155[电气工程—电工理论与新技术]