Analysis of higher harmonics influence from non-linear sources of 6 Kv on losses in conducting parts based on wavelet analysis

In order to analyze non-sinusoidal modes of power supply systems, an accurate determination of parameters for these modes is required. Effective values of currents and voltages are among these parameters. The work is based on the wavelet transform, which allows the values for these parameters depending on each harmonic component to be accurately defined without losing data in the time domain. The power supply system under the non-stationary and non-sinusoidal operation mode is considered in the paper. Analysis of higher harmonics influence from non-linear sources of 6 kV on losses in electric power lines is performed. In particular, effective values of currents and losses in the 6 KV line for each harmonic component separately are calculated. The results obtained by the wavelet-transform are compared to the results obtained by the Fourier transform and analytical calculation. As a numerical experiment a simulation model of the network with a non-linear, non-stationary load is developed in the environment of MATLAB Simulink.