Recognition of harmonic sources in distribution network using fractal analysis

Abstract

One of the most important power quality problems is harmonic pollution in power system. In recent years there has been an increase in voltage and current distortion in the distribution network due to the extensive use of power electronic and computer controlled devices. In this paper, using fractal analysis the source of harmonic pollution has been identified in a radial power system distribution network. The fractal technique provides both time and spectral information of the nonlinear load harmonic patterns. The network is simulated using EMTP/ ATP software. Simulation results have been presented which show that the proposed method can successfully identify the location of the harmonic source in case of a single harmonic source and location of dominant source of harmonic pollution in case of multiple harmonic sources in the system.