单极性长持续时间脉冲电流的测量研究  

Research on the measurement of monopole long duration current pulse

作　　者：万翔 孙伟[1] 王影影 姚学玲[2] 黄海博 Wan Xiang;Sun Wei;Wang Yingying;Yao Xueling;Huang Haibo(School of Mechanical and Electrical Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China)

机构地区：[1]西安建筑科技大学机电学院,西安710055 [2]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《电测与仪表》2020年第17期116-122,共7页Electrical Measurement & Instrumentation

基　　金：国家自然科学基金资助项目(51577151,51477132)。

摘　　要：文章基于频率跨度较大的单极性长持续时间雷电流波,就如何拓宽自积分式Rogowski线圈测量带宽及如何增大电流测量范围的问题展开研究。针对脉冲电流波具有波前部分快速变化与波尾部分缓慢变化的特点,在对不同脉冲电流波频谱分析的基础上,设计了锰锌(Mn-Zn)和镍锌(Ni-Zn)铁氧体作为磁芯的自积分式Rogowski线圈,对不同频率跨度的脉冲电流波进行测量。对比测量结果,得到以下结论:镍锌铁氧体作为磁芯,磁导率越高,线圈下限频率越低,低频响应越好,而高频部分的响应越差;磁导率相同的锰锌铁氧体和镍锌铁氧体磁芯,饱和磁通越大,线圈所能准确测量的电流幅值越大。In this paper,based on the unipolar long duration lightning current wave with large frequency span,how to widen the measuring bandwidth of self-integrating Rogowski coil and how to increase the measuring range of current are studied.Aiming at the characteristics of the pulse current wave,which is characterized by the rapid change of the front part and the slow change of the tail part,a self-integrating Rogowski coil with manganese-zinc(Mn-Zn)and nickel-zinc(Ni-Zn)ferrite as the core is designed based on the analysis of the frequency spectrum of different pulse current waves,and the pulse current waves with different frequency spans are measured,the following conclusions are obtained by comparing the measured results,in which the nickel-zinc ferrite as the core,the higher the magnetic permeability,the lower the lower limit frequency of the coil,the better the low-frequency response,and the worse the response of the high-frequency part;the manganese-zinc ferrite and nickel-zinc ferrite of the magnetic core with the same permeability rate,the larger the saturation flux,the larger the current amplitude that the coil can accurately measure.

关 键 词：雷电流波 频谱分析 磁导率 ROGOWSKI线圈 

分 类 号：TM835[电气工程—高电压与绝缘技术]