基于ARM+FPGA的电压监测仪现场校验装置设计与实现
Design and implementation of field calibration device for voltage monitor based on ARM+FPGA
黄亚龙 1孙雄 1徐浩然 1叶加星1
作者信息
- 1. 江苏方天电力技术有限公司,江苏 南京 211102
- 折叠
摘要
针对电压监测仪因受器件老化及现场环境影响等导致测量准确度降低和现场校验困难等问题,提出了一种基于ARM+FPGA的电压监测仪现场校验设计方案.介绍了校验系统的校验原理及指标,并给出了校验系统的组成及设计原理框图;详细阐述了ARM+FPGA主控模块、幅值调整电路、滤波电路、功率放大电路和通信电路等硬件模块设计.考虑到日趋严重的电网谐波污染,引入鲁棒锁相环实现谐波电压检测以提高监测精度.给出校验系统的软件设计流程,并实现电压监测及误差校验等功能.在无谐波和有谐波环境下进行了系统准确度和长时间稳定度测试.实验结果表明,该校验装置能产生精度为0.05 级的标准电压源,以满足校验和长时间工作稳定性要求,有效解决了电压监测仪现场校验难题.
Abstract
For solving the accuracy reduction of voltage monitor due to aging and bad environment,a field calibration scheme for voltage monitor based on ARM+FPGA is proposed in this paper.The princi-ple and index of the calibration system are introduced,as well as design diagram of the system.The de-sign scheme of ARM+FPGA control module,amplitude adjustment circuit,filter circuit,power amplifier circuit and communication circuit are described in detail.Considering serious harmonic pollution of power grid,a robust phase-locked loop is used to realize harmonic detection for improving system accuracy.The software of the calibration system is described,realizing functions of voltage monitoring and error cal-ibration.Accuracy and long-term stability of the system are tested in non-harmonics and harmonic en-vironments.The experimental results show that the calibration system can produce a standard voltage source with 0.05 precision,meets the requirements of calibration and long-term stability,and can solve the problem of field calibration of voltage monitor.
关键词
电压监测仪/现场校验/谐波/鲁棒锁相环Key words
voltage monitor/field calibration/harmonic/robust phase-locked loop引用本文复制引用
基金项目
国家自然科学基金(51577086)
国家电网科技项目(OFW-23737-JS)
出版年
2024
NETL
NSTL
万方数据