基于宽频混合自积分的脉冲电流测量探头  

Pulse Current Measurement Probe Based on Broadband Hybrid Self-integration

作　　者：王永生[1] 苏芳菲 万臻博 张习文 丁卫东[1] WANG Yongsheng;SU Fangfei;WAN Zhenbo;ZHANG Xiwen;DING Weidong(State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University,Xi’an 710049,China;State Grid Zhengzhou Power Supply Company of Henan Electric Power Company,Zhengzhou 450006,China)

机构地区：[1]西安交通大学电工材料电气绝缘全国重点实验室,西安710049 [2]国网河南省电力公司郑州供电公司,郑州450006

出　　处：《高电压技术》2024年第1期432-440,共9页High Voltage Engineering

基　　金：国家自然科学基金(52007144)。

摘　　要：目前有很多针对脉冲功率装置的纳秒脉冲电流测量传感器的研究,但现有脉冲电流测量探头大多关注高频信号的采集特性,很少见到对高低频信号都有较好响应的宽频带纳秒脉冲电流测量探头。基于一种新的电路拓扑设计了一款采用混合积分器的宽频电流传感器,并对其工作原理和电缆匹配方式进行了理论分析,介绍了电流探头整体的结构设计,通过阶跃响应实验探究了不同参数对研制的电流探头输出波形的影响。实验结果表明:积分电阻、采样电容对时间常数和低频灵敏度影响较大,积分电阻增加时探头输出幅值减小时间常数增大,采样电容减小时探头输出信号幅值增加时间常数减小;采样电阻对高频灵敏度影响较大,阻值过大会引起测量信号波头过冲畸变。在实际参数设计时,可以根据实际测量需求调整以上高、低频灵敏度的相关参数来满足实际测量要求。At present,many researches on nanosecond pulse current measurement sensors for pulsed power devices are available,however,most of the existing measurement probes for pulse current focus on the acquisition characteristics of high-frequency signals,and few measurement probes for broadband nanosecond-pulse current have an excellent response to both high-frequency and low-frequency signals.In this paper,a broadband current sensor using a hybrid integrator is designed based on a new circuit topology,and its working principle and cable matching mode are theoretically analyzed.The overall structure design of the current probe is introduced,and the influence of different parameters on the output waveform of the designed current probe is explored through step response experiments.The experimental results show that the integral resistance and sampling capacitance have a great influence on the time constant and low-frequency sensi-tivity.When the integral resistance increases,the probe output amplitude decreases,and the time constant increases.When the sampling capacitance decreases,the probe output signal amplitude increases and the time constant decreases.The sampling resistance has a great influence on the high-frequency sensitivity,and excessive resistance will cause overshoot distortion of the measuring signal wave front.In the actual parameter design,the above high and low-frequency sensitivi-ty-related parameters can be adjusted according to the actual measurement requirements to meet the actual measurement requirements.

关 键 词：B-dot LR积分器 RC积分器 测量 快脉冲电流 

分 类 号：TM933.1[电气工程—电力电子与电力传动]