Analysis of The Impact of Harmonics on Power Metering of High Voltage Transmission Lines

In order to analyse the impact of harmonics on the measurement accuracy and precision of UHV(Ultra High Voltage) line power metering meter, this paper takes MATLAB/Simulink as the simulation platform, and establishes a simulation model of UHV transmission line and power metering meter, so as to measure the fundamental wave of electric energy and the various harmonics power. In order to solve the fence effect and spectrum leakage caused by non-integer period sampling, this paper combines the FFT with the Hanning window interpolation method. The simulation results show that the model built and the method adopted in this paper can accurately obtain the magnitude and direction of the harmonic power, and effectively solve the problem of metering accuracy.