直流大电流测量技术研究

发布时间：2018-05-05 07:52

本文选题：直流电流测量 + 磁化电流　；参考：《华北电力大学》2014年硕士论文

【摘要】：首先介绍了直流大电流测量的几种主要原理,分别列举了由分流器、霍尔效应、巨磁电阻效应、磁光效应、传统铁芯式直流电流互感器、直流比较仪、罗柯夫斯基(Rogowski)线圈等测量原理组成的各种直流电流传感器,混合式直流电流传感器、组合式高压直流互感器,阐述了它们的外形、特征、工作特性和应用实例。然后以理论分析和实验观察相结合的方式对单铁心磁调制器进行了深入的研究。从铁磁性物质的磁滞回线开始,分析研究了交流和直流同时激励时铁芯的磁滞回线；单一的正弦波电压源激励作用下磁化电流的波形；正弦波电压与直流电流同时磁化时的铁芯线圈电路等,针对理论分析的每一部分内容都用实验观察的方法做了验证。接下来,在实验研究和理论分析的基础上提出了一种测量直流电流的新方案——单铁芯磁调制器峰差式直流电流测量方案,指出新测量方案有开环测量和闭环测量两种方式,并分别列出了用硬件和用单片机加软件来实现开环测量和闭环测量的电原理图。
[Abstract]:The main principles of DC large current measurement are introduced, and the various DC current sensors, such as the shunt, Holzer effect, giant magnetoresistance effect, magnetoresistance effect, the traditional core type DC current transformer, the DC comparator and the Rocco J J Ki (Rogowski) coil, are respectively enumerated. The shape, characteristics, working characteristics and application examples of the combined HVDC transformer are described. Then the single core magnetic modulator is studied in a combination of theoretical analysis and experimental observation. From the hysteresis loop of ferromagnetic material, the hysteresis loop of the core is analyzed and studied at the simultaneous excitation of AC and DC. Line; the waveform of the magnetization current under the excitation of a single sinusoidal voltage source; the iron core coil circuit when the sinusoidal voltage and the DC current are magnetized at the same time. Each part of the theoretical analysis is verified by the experimental observation method. Then, a measuring method is put forward on the basis of experimental research and theoretical analysis. The new scheme of current current is the peak difference DC current measurement scheme of single iron core magnetic modulator. It points out that the new measurement scheme has two modes of open loop and closed loop measurement, and the electrical schematic of open loop measurement and closed loop measurement with hardware and single chip computer and software are listed respectively.

【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM835.2

【参考文献】