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Power quality pre-evaluation method considering the impact of electrified railway

In order to assess the greatest impact of electrified railway on the power quality of the points of common coupling, a power quality prediction and evaluation method considering the impact of electrified railway is proposed. This paper explains the prediction and evaluation method based on a typical case of an electrified railway system. First, according to the characteristics of the traction power supply system, the power system, and all the different working conditions of the traction load, various power quality indicators at the public connection point are simulated and calculated. Then, combined with the power quality background harmonic test results of the substations, the power quality prediction evaluation results that take into account the impact of electrified railway are obtained. Finally, according to the requirements of the national standard, the limits of various power quality indicators are listed, and the prediction and evaluation conclusions are given by comparing the evaluation results and the limits. It provides a basis for the subsequent electrified railway power quality management plan and reactive power compensation device configuration.