自动化检定流水线环境下射频信号对智能电能表误差的影响分析

Analysis of the influence of RF signal on the error of smart electricity meter in the environment of automatic verification pipeline

随着智能电网的不断发展和完善,智能电能表作为计量电能的终端产品被广泛应用,而对其检定的自动化程度也越来越高,因此,智能电能表自动化检定流水线得到快速发展。与此同时,智能电能表自动化检定流水线的环境中,移动通信射频信号对电能表计量准确度的电磁辐射影响也逐渐引起了关注。为了研究射频信号对电能表计量的影响,文中分析了射频信号对电能表计量影响的干扰途径,分析了射频信号影响电能表计量的机理。测试了自动化检定流水线的环境中射频干扰信号的强度,基于干扰信号的调制方式建立了干扰信号数学模型,根据干扰信号数学模型和实测射频信号的功率谱,通过仿真分析确定了干扰信号对电能表的影响属于一种均匀性分布的噪声。建立了射频信号对电能表计量误差影响的数学模型,通过仿真分析电能表误差,给出智能电能表大规模自动化检定流水线射频信号的影响结果。

With the continuous development and improvement of smart grid,the smart electricity meters are widely used as terminal products for measuring electric energy,and the automation degree of their verification is also getting higher and higher.Therefore,the automatic verification pipeline of smart electricity meters has been rapidly developed.Meanwhile,the electromagnetic radiation effect of high-frequency radio signals of mobile communication on the metering accuracy of electricity meters is also gradually attracting attention in the environment of automatic verification pipeline of smart electricity meters.In order to study the influence of high-frequency RF signal on the metering of electricity meters,this paper firstly analyzes the interference path of the influence of RF signal on the metering of electricity meters,and analyzes the mechanism of the influence of RF signal on the metering of electricity meters.Secondly,the automatic detection line of high frequency radio frequency interference signal strength is tested,and the interference signal mathematical model is established based on the interference signal modulation mode,and then,according to the mathematical model and the measured interference signals of RF signal power spectrum,and the effect of interference signals of electricity meter belongs to a kind of uniformity of the distribution of noise is determined through the simulation analysis.Finally,the mathematical model of the influence of RF signal on the metering error of electricity meters is established,and the influence of RF signal on the large-scale automatic verification pipeline of smart electricity meters is given by analyzing the error of electricity meters through simulation.