摘要
为了实现对继电保护装置电磁敏感性的系统化分析及预测,提出了一种描述其信号端口电磁干扰传播通道特性的方法.该方法参照IEC相关电磁兼容试验标准,根据输入、输出波形得到信号端口电磁干扰传播通道传递函数的频域表达式,基于频域采样的离散值,以矢量匹配法(VFM)结合有理函数逼近构造传递函数的宏模型,在宏模型的基础上导出了该电磁干扰传播通道的等效电路.运用这种方法能很好地解决仿真过程中出现的时域、频域混合问题以及随着函数逼近过程中阶数增高出现的矩阵病态问题.通过仿真结果和试验结果的对比,验证了该方法的正确性和可行性.
To realize systematic analysis and forecast for electromagnetic susceptibility （EMS）, a method is presented to characterize electromagnetic interference （EMI） coupling path of signal port of relay protection equipment in power system. Referring to test standard of IEC, the transfer function of EMI coupling path in frequency domain is gotten according to the tested interference waveform. Based on discrete value by method （VFM） is adopted combining rational sampling in frequency domain, the vector fitting function approximation to construct the macromoel and equivalent circuit of EMI coupling path, thus the problem of ill-condition matrix with high order approximation is alleviated and the mixed frequeney/time domain problem is solved. Good coincidence between the simulated result and the measurements demonstrates the validity of this modeling method.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2009年第10期104-108,共5页
Journal of Xi'an Jiaotong University
基金
教育部高等学校博士学科点专项科研基金资助项目(20060698036)
教育部新世纪优秀人才支持计划资助项目(NCET-07-0675)
陕西省自然科学基金资助项目(2007E222)
关键词
继电保护装置
电磁干扰传播通道
矢量匹配法
宏模型
relay protection equipment
electromagnetic interference coupling path
vector fitting method
macromodel
