Analysis Of The Influence Of Harmonic On Electric Energy Meter And Research On Its Countermeasures

Harmonics are sinusoidal voltages or currents generated by non-linear loads and are distortion waveforms formed by sinusoidal superposition of higher harmonics.Harmonics also generate electrical energy,which is different from the electrical energy produced by the original sine wave,affecting the economic benefits of electricity supply and demand.The paper first introduces the causes and research status and significance of harmonics,and then analyzes the structure and measurement principle of inductive energy meters and electronic energy meters,and theoretically derives the influence of harmonics on the accuracy of energy measurement.The MATLAB simulation platform is used to establish the harmonic generation model,and the variation of the linear load under the action of harmonics and the specific influence of power,phase angle and amplitude are studied.The linear load and the nonlinear load are established under the action of sine wave power.And the linear load waveform changes and the specific effects of phase angle,amplitude and power,verify that the theoretical inference of harmonics on the energy metering is correct,and the irrationality of existing energy metering methods.Aiming at the measurement problem of frequency fluctuation,a measurement method using Hanning window interpolation correction algorithm is proposed.Through calculation and simulation,this method can effectively correct the measurement deviation problem.Finally,this paper proposes the application of the least twoBy multiplying the energy metering mode of the regression model,the method can accurately identify the linear load,the nonlinear load and the harmonic power emitted by the system,and can better solve the problem that the current metering mode is unreasonable.