THD Analysis of Converter Power Station 25 kV 50 Hz

The article deals with the waveform total harmonic distortion (THD) analysis at the multilevel converter output under selected conditions. The simulations results take into account the influence of the converter topology, the number of converter levels and the phase shift in the individual branches of single-phase multilevel converters, the switching frequency and the type of PWM. The converter simulation also considers specific traffic situations with a subsequent evaluation of the investigated quantities influence. The analysis aim can be summarized in finding the ideal configuration of the output converter from the THD point of view.