摘要
为准确测量脉冲成形网络PFN中的脉冲大电流,建立了测量系统中所使用的Rogowski线圈的数学模型,并通过对其数学模型的频域分析,给出了外积分型Rogowski线圈采样电阻的选取方法。同时为使采用外积分型Rogowski线圈的测量系统获得良好的频域特性,给出了一种改进型一次积分电路,并通过MATLAB软件仿真,比较了采用改进型积分电路和普通RC无源积分电路下系统的频域特性。仿真和实验的结果表明,采用所给的改进型一次积分电路能够扩宽整个测量系统的频带以及提高测量系统的灵敏度。
PFN is widely used in modem science and technology, such as in the research of ITER and electro thermal chemical launch technology. In order to accurately measure the pulsed high current in PFN, the mathematical model of Rogowski coil which has been used in the measurement system is established. By analyzing its mathematical mod- el in frequency-domain, the method for choosing the sampling resistance of the outer-integrator Rogowski coil is presented. In order to ensure the measurement system to gain the optimum frequency domain characteristic, a kind of improved primary integral circuit is proposed. By using the MATLAB software to simulate the system under two different integral circuits that are improved primary integral circuit and normal RC integral circuit without power source, the frequency response between two kinds of measurement systems is compared. The schematic of experimental system is given and the principle of the experimental system is introduced in the paper. The simulation resuits and experimental results are illustrated respectively. It can be seen that the bandwidth of frequency of the whole measuring circuit is expanded and the sensitivity of the system for measurement is increased by using improved primary integral circuit. It is also proved that the values of sampling resistance and integral parameters using in the experimental system are correct and reasonable from the experimental results. The method for choosing the sampling resistance and the improved primary integral circuit that is given in the paper are valuable for pulse current measurement using Rogowski coil.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2007年第7期84-87,共4页
High Voltage Engineering
基金
国家高科技863研究发展计划~~
关键词
脉冲成形网络
脉冲电流测量
ROGOWSKI线圈
幅频特性
频带
采样电阻
灵敏度
PFN
pulse current measurement
Rogowski coil
amplitude-frequency characteristic
bandwidth of frequency
sampling resistance
sensitivity
作者简介
钟和清 1974-,男,博士,工程师,研究方向为电力电子与电力传动技术、电磁兼容技术和脉冲功率技术.E-mail：raybest@263.net
张华 1982-,男,硕士生,研究方向为电力电子与电力传动.
