基于 ARM 的金属氧化物避雷器在线监测系统设计与实现

摘要

针对现有金属氧化物避雷器在线监测系统抗干扰能力差，数据处理不准确，工作不稳定等诸多问题，设计了基于ARM控制芯片和ZigBee技术的MOA在线监测系统，给出了系统的整体设计方案，完成了信号采样、调理单元和A RM终端的设计。采用有线和无线通讯相结合的方式进行通讯，采取屏蔽、接地和隔离等措施进行抗干扰处理。进行了系统主程序、工况辨识子程序、信号采集与分析子程序和通讯子程序等软件设计，采用组态软件技术设计了系统的上位机软件。对数字滤波、FFT变换和基波电流峰值的提取等进行了仿真分析，仿真结果验证了系统的可行性和有效性。%Metal Oxide Arrester (MOA) on-line monitoring system based on ARM chip and ZigBee technol-ogy has been designed in this paper to overcome the problems of existing M OA such as poor anti-interfer-ence ability ,inaccurate data processing and instability .Under the overall design of the system ,signal sam-pling unit ,signal conditioning unit and ARM terminals have been completed .Wired and wireless commu-nication ,shielding ,grounding and isolation ,etc .anti-interference measures have been used in the system . Software design consists of main program design ,state identification subroutine design ,signal acquisition and analysis subroutine design and communication subroutine design and so on .The upper computer soft-ware system adopts configuration software technology .A simulation analysis of the digital filter ,FFT transformation and fundamental current peak extraction is obtained .The simulation results verify the fea-sibility and effectiveness of the system .