A Study to Investigate Total Harmonic Distortion in Electric Railway Power System

In recent years, harmonic distortion has emerged as a significant issue in electric distribution systems. Many electric utilities have been grappling with problems linked to harmonic distortion within their networks. THD, arising from non-linear loads and equipment can lead to voltage and current waveform distortions within the power supply network, causing power quality issues and potentially affecting the performance of trains and associated equipment. The proliferation of electronic devices and power-hungry systems in railway networks has heightened concerns about THD, which can have detrimental effects on equipment performance and power quality. Waveform distortion is a constant presence to some degree in electric power systems. However, there is a mounting apprehension regarding this issue due to the growing prevalence of nonlinear and sensitive electric and electronic equipment. These concerns extend to both customers and utilities alike. The purpose of this research is to explore the harmonic distortion induced by electric locomotives within the utility supply network. During this survey, aside from examining harmonic distortion, monitor and analyze other power quality issues within the railway electric supply system. The findings from this on-site survey, which supplies power to the railway electric supply system, will be presented along with recommended remedial actions.