Recently, Power Quality is attracting the attention
of researchers focused on distribution network reconfiguration. Mainly,
harmonic distortion as an emerging issue of distribution networks plays an essential
role in power quality-oriented network reconfiguration. Commonly, harmonic
analysis of distribution networks is being performed while considering
non-linear loads, capacitor banks, sub-transmission transformers, and line
impedances. However, in harmonic analysis, the presence of linear loads and
their effects are being neglected. Consideration of linear loads in harmonic
analysis affects the impedance characteristic of the distribution network. Consequently,
it changes the total harmonic distortion of bus voltages. In this paper, for
the first time, exhaustive research is performed on the effect of linear loads in
distribution network reconfiguration by considering five conventional linear
load models. The evaluations are conducted on two balanced and unbalanced distribution
networks: IEEE 69-bus and 95-bus practical Iranian distribution network using
particle swarm optimization aiming to find the minimum total losses of the
network. Comparison results confirm that the linear load modelling is very
effective in the optimum configuration.
Appraisal of linear load effect on non-linear distortion coefficient from rectifier
