基于频率差的工频磁场抗扰度试验方法  

Test Method for Power Frequency Magnetic Field Immunity Based on Frequency Difference

作　　者：刘杲培 邓代记[2] Liu Gaopei;Deng Daiji

机构地区：[1]南京南瑞继保工程技术有限公司 [2]南京南瑞继保电气有限公司

出　　处：《安全与电磁兼容》2024年第3期63-68,105,共7页Safety & EMC

摘　　要：现有工频磁场抗扰度试验方法评价受试设备在工频磁场骚扰下的采样性能时,试验结果随机,可能出现误判。结合GB/T 17626.8-2006要求、试验方法及试验仪器的特点,文章分析了试验结果出现随机现象的原因。在此基础上,提出了基于受试设备基本分量及干扰分量频率差的工频磁场抗扰度试验方法。多种电气二次设备的工频磁场抗扰度试验结果表明,频率差法通过人为合理设置频率差,在受试设备的正常使用状态下,可有效检测出工频磁场骚扰对受试设备的最大影响程度,消除了试验结果的随机性。频率差法适应性好、操作简便,不仅适用于电力工业领域,也有利于形成具有良好的共同性和重复性的基准。When evaluating the sampling performance of the tested equipment under power frequency magnetic field disturbance using existing power frequency magnetic field immunity testing methods,the test results are random and may result in misjudgments.Based on the requirements of GB/T 17626.8-2006,testing methods,and characteristics of testing instruments,this article analyzes the reasons for the occurrence of random phenomena in test results.On this basis,a power frequency magnetic field immunity test method based on the frequency difference between the basic components and interference components of the tested equipment is proposed.The results of power frequency magnetic field immunity tests on various electrical secondary equipment show that the frequency difference method effectively detects the maximum impact of power frequency magnetic field disturbance on the tested equipment under normal use by artificially setting the frequency difference reasonably,eliminating the randomness of test results.The frequency difference method has good adaptability and is easy to operate.It is not only applicable to the field of power industry,but also conducive to forming benchmarks with good commonality and repeatability.

关 键 词：电磁兼容 抗扰度试验 工频磁场 频率差 幅值误差 相位误差 

分 类 号：G63[文化科学—教育学]