基于ARM的电能质量监测系统的研究与设计

发布时间：2018-05-22 13:04

本文选题：电能质量 + ARM　；参考：《哈尔滨理工大学》2017年硕士论文

【摘要】：电力系统中,大量电力电子装置及非线性负载投入使用,产生了电压扰动、电压波形畸变、闪变等电能质量问题。严重危及电网的稳定运行,同时对用户造成了严重影响。为此,本文设计了一种基于ARM+Linux的电能质量监测仪,实现了对电能质量的在线监测,为有效地改善、治理电能质量问题提供真实的数据。本文详细分析了国内外电能质量监测技术的研究现状,主要从电能质量监测装置、电能质量监测分类以及电能质量监测方法三个方面进行论述;详细介绍了我国电能质量标准中对电能质量参数指标的含义、特性及标准算法。提出了以ARM为处理器,嵌入式Linux为软件核心的电能质量监测系统的总体设计方案;完成了以ARM为核心的硬件系统设计。硬件系统主要包括信号调理模块、A/D转换模块、系统供电模块;对硬件进行了测频电路的测试、选用二阶巴特沃斯低通滤波电路作为抗混叠滤波电路,并进行了仿真分析,铁电FM25V20用于存储一些重要参数,以总线速度进行写操作,大大提高了读写速度及储存能力。构建了电能质量嵌入式Linux操作系统软件开发平台,完成了电能质量硬件系统上的引导程序、内核及文件系统移植;开发了底层驱动程序,引出Linux系统的驱动模型。设计实现了电能质量的应用软件,采用快速傅立叶变换进行信号处理,通过Qt/embedded完成电能质量的人机接口设计。在电能质量检测系统硬件平台上对嵌入式Linux操作系统软件功能进行了测试,实验测试表明,本电能质量监测系统能够完成电能质量监测任务,主要包括电压偏差、频率偏差、总谐波畸变率,均在允许范围内。从性能、实时性、成本等角度出发,本系统能够满足实际应用需求,且具有较好的人机交互性,符合最新的电能质量监测要求。
[Abstract]:In power system, a large number of power electronic devices and nonlinear loads are put into use, resulting in voltage disturbance, voltage waveform distortion, flicker and other power quality problems. It seriously endangers the stable operation of the power grid, and at the same time has a serious impact on the users. Therefore, this paper designs a kind of power quality monitor based on ARM Linux, realizes the on-line monitoring of power quality, and provides real data for effectively improving and solving power quality problems. In this paper, the research status of power quality monitoring technology at home and abroad is analyzed in detail, mainly from three aspects: power quality monitoring device, power quality monitoring classification and power quality monitoring method. The meaning, characteristics and standard algorithm of power quality parameters in power quality standards in China are introduced in detail. The overall design scheme of power quality monitoring system with ARM as processor and embedded Linux as software core is put forward, and the hardware system based on ARM is designed. The hardware system mainly includes signal conditioning module / A / D conversion module and system power supply module. The frequency measurement circuit of the hardware is tested, and the second-order Butterworth low-pass filter circuit is selected as the anti-aliasing filter circuit, and the simulation analysis is carried out. Ferroelectric FM25V20 is used to store some important parameters and write at bus speed, which greatly improves the speed of reading and writing and the ability of storage. The software development platform of the power quality embedded Linux operating system is constructed, the boot program on the power quality hardware system is completed, the kernel and file system are transplanted, the bottom driver program is developed and the driving model of the Linux system is elicited. The application software of power quality is designed and realized. The fast Fourier transform is used to process the signal and the man-machine interface of power quality is designed by Qt/embedded. The software functions of embedded Linux operating system are tested on the hardware platform of the power quality detection system. The experimental results show that the power quality monitoring system can accomplish the power quality monitoring task, mainly including voltage deviation and frequency deviation. The total harmonic distortion rate is within the allowable range. From the point of view of performance, real-time and cost, the system can meet the practical application requirements, and has better man-machine interaction, and meets the latest power quality monitoring requirements.
【学位授予单位】：哈尔滨理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM930

【相似文献】