Rogowski线圈宽范围电流测量的研究

发布时间：2017-12-30 21:32

本文关键词：Rogowski线圈宽范围电流测量的研究　出处：《贵州大学》2016年硕士论文　论文类型：学位论文

【摘要】：当前,电网自动化和智能化已经相对成熟,电网二次系统已基本实现了计算机综合自动化的控制。但仍有部分电磁式电流和电压互感器在很多变电站上挂网运行。另外,随着现代工业的不断发展,电力系统的输、配电量的不断增大,以及电压等级的不断提高,传统的电磁式互感器在测量信号的精度、范围、动态响应宽度方面暴露了很多的弱点,难以满足电网对设备参数的需要。因此,本文对较为先进的Rogowski线圈电流互感器进行研究,此项研究无论是对实现电网的智能化,还是保证电网的安全可靠运行均具有特别重要的实践价值。本文首先介绍了国内外电子式电流互感器的研究状况,陈述了Rogowski线圈测量电流的原理,论证罗氏线圈作为传感器元件所具有的优良特性。研究了结构、电磁参数对Rogowski线圈动态性能的影响,提出一种合理的Rogowski线圈设计方案。在此基础上,实现了测量信号的处理,以STC89C52为控制芯片,ADE7753为信号处理芯片,设计了整体的硬件电路,并创新性的实现了电流的宽范围测量。在LabVIEW 2011虚拟仪器开发平台上设计了上位机软件实现实时电流值的显示以及Rogowski线圈变比的设置。最后对互感器角差、比差的补偿进行了研究,得出样条插值的补偿方法,实现了软件的补偿。根据实验测试,Rogowski线圈宽范围测量电流的功能和对信号的处理已基本实现,为Rogowski线圈电流互感器在智能电网中的应用研究提供了理论依据。
[Abstract]:At present, the automation and intelligence of power grid has been relatively mature. The secondary system of power network has basically realized the control of computer integrated automation. However, some electromagnetic current and voltage transformers still operate on many substations. In addition, with the development of modern industry. With the transmission of power system, the increasing of distribution quantity and the constant improvement of voltage level, the traditional electromagnetic transformer has exposed many weaknesses in measuring signal precision, range and dynamic response width. It is difficult to meet the needs of the equipment parameters of the power network. Therefore, this paper studies the more advanced Rogowski coil current transformer, whether it is to realize the intelligent power grid. It is of great practical value to ensure the safe and reliable operation of power grid. Firstly, this paper introduces the research status of electronic current transformers at home and abroad. The principle of current measurement by Rogowski coil is described, and the excellent characteristics of Roche coil as a sensor element are demonstrated. The structure of the coil is studied. Based on the influence of electromagnetic parameters on the dynamic performance of Rogowski coil, a reasonable design scheme of Rogowski coil is proposed. On this basis, the processing of measurement signal is realized. Taking STC89C52 as the control chip, ADE7753 is used as the signal processing chip, and the whole hardware circuit is designed. And creatively realized the wide range of current measurement. In LabVIEW. The host computer software is designed on the virtual instrument development platform in 2011 to realize the display of the real time current value and the setting of the Rogowski coil ratio. Finally, the angle difference of the transformer is given. The compensation of the ratio difference is studied, and the compensation method of spline interpolation is obtained, and the software compensation is realized. The function of Rogowski coil wide range current measurement and signal processing have been basically realized, which provides a theoretical basis for the application of Rogowski coil current transformer in smart grid.
【学位授予单位】：贵州大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TM452

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