Research On The Influence Of Radio Frequency Signal And Power Frequency Magnetic Field On The Energy Of Electric Energy Meter

With the comprehensive advancement of the construction of smart grids,the demand for intelligent electricity meters as a terminal product for measuring electrical energy has greatly increased,which has led to a sudden increase in the meter inspection quantity.The traditional verification mode is not only inefficient,but also wastes a lot of manpower,material resources and financial resources.Therefore,the automatic verification pipeline for large-scale intelligent electricity meters has developed rapidly.At the same time,the influence of the electromagnetic environment on the automatic verification line of intelligent electricity meters on the measurement accuracy of intelligent electricity meters has gradually attracted attention.Firstly,this paper introduces the principle of intelligent electricity meters and its shunt and voltage divider,summarizes the research status of electromagnetic compatibility and the influence of electromagnetic environment on intelligent electricity meter,analyzes the source of electromagnetic environment on the automatic verification assembly line and the mechanism of the influence of RF signal and power frequency magnetic field on intelligent electricity meter,and measures the RF signal and voltage divider on the automatic verification assembly line Intensity of power frequency magnetic field.Secondly,the type of RF signal is determined,and the key technologies of RF signal in communication system are studied:orthogonal frequency division multiplexing(OFDM)modulation and QAM modulation.The 64QAM modulation model of RF signal is established,and the characteristics of RF signal are simulated and analyzed.Finally,based on the working mechanism of intelligent electricity meters and RF signal interference channels of the impact of intelligent electricity meter,intelligent electricity meter radio frequency interference structured model is established,and the interference of structured model,on the basis of electricity meters measuring error influence of RF signal mathematic model,the simulation calculation error size,automatic verification lines of RF signal is given to the result of intelligent electricity meters.