Determination of network voltage distortion factor by digital computer simulation

A method for the computation of the voltage distortion factor by digital computer simulation of a network and a thyristor-regulated d.c.-motor drive has been developed. The influence of higher harmonics and network and motor-armature time constants on the network voltage distortion factor has been investigated. The results obtained from the voltage distortion factor computation are represented by curve families with normalised values of network and drive parameters. A good correlation has been found between computation results and experimentally obtained values.